Careers at Sixt

You want to work on the core of high-impact mobility experiences, drive topics across multiple product and platform areas, and shape the future architecture of a broad Java backend landscape? Then join us and help evolve the systems behind digital checkout, post-booking journeys, customer self-service, and the shared platform capabilities around them. We are building and operating business-critical backend services with a strong focus on scalability, resilience, observability, and testability. Join us in Pullach near Munich and help shape the future of mobility with us! YOUR ROLE AT SIXT You design, build, and evolve reliable and scalable backend services in modern Java and Spring Boot across multiple product areas and shared platform capabilities You stay hands-on in code, lead cross-team technical initiatives, and drive topics from idea to production with clear business impact You work across REST and gRPC APIs, event-driven flows, PostgreSQL, Redis, Kafka, Flyway, and shared platform libraries to deliver robust customer-facing solutions You raise the bar on architecture, observability, performance, security, testing, and developer experience in a cloud-native environment with Kubernetes, CI/CD, and modern engineering guardrails You collaborate closely with product managers and cross-functional team members across backend, web, and mobile, and you mentor engineers through strong technical leadership, reviews, and knowledge sharing You use AI-assisted tooling pragmatically where it improves quality, speed, or developer experience, and you help define sensible engineering practices around it YOUR SKILLS MATTER Experience You have deep experience building backend services with modern Java and Spring Boot, and you are comfortable operating at Staff level across architecture, implementation, and cross-team technical leadership Architecture You are experienced in microservices and event-driven architectures, and you know how to design for reliability, scalability, idempotency, and long-term maintainability Data Stores You have worked with PostgreSQL, JPA/Hibernate, Flyway, Redis, and Kafka, and understand how to choose the right persistence and messaging patterns for the problem Operations You are comfortable owning services in production environments and improving them through observability, metrics, alerting, CI/CD, and Kubernetes-based operations AI-Assisted Development You are comfortable using AI-assisted tools thoughtfully and know how to apply them in ways that remain reviewable, reliable, and useful in day-to-day engineering work Curiosity You are collaborative, and product-minded, willing to work across the stack when needed; experience with React, TypeScript, micro-frontends, and end-to-end feature delivery is a huge plus WHAT WE OFFER Extra benefits Enjoy discounts on SIXT rent, share, ride and SIXT+, attractive vehicle leasing offers, and exclusive deals with partners for travel, tech, fashion and more Mobility boost We support you with a monthly mobility allowance of €20 per month for even more freedom Future security We contribute to your retirement plan and support you with capital-forming benefits to ensure you are well covered Feel-good atmosphere Stay active with our modern SIXT gym, various leisure activities like the gaming area or the SIXT choir, and enjoy our high-quality employee restaurant Flexibility Enjoy 30 days of vacation and a hybrid working model with flexible hours Giving back Take one day each year to volunteer at a charitable organization dedicated to supporting children About us: We are a globally leading mobility service provider with a revenue of €4.3 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 360,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 100 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight. Get started with us and apply now!

At SIXT, we are building the semantic foundation that lets AI agents and thousands of analysts query our data platform reliably in natural language. As Senior Analytics/Data Engineer in our Data Platform team, you design the semantic layer and ontologies on top of our AWS-based data platform and build the text-to-SQL agents that turn them into business value. You will join a team of 30 data engineers building the data platform for analytics and AI agents across the SIXT group, working with state-of-the-art LLM technology to shape how our business interacts with data, apply now and become part of Team Orange! YOUR ROLE AT SIXT You define and build our semantic layer (metrics, dimensions, entities) on top of the AWS data warehouse, creating a single source of truth for KPIs consumed by BI tools, analysts, and AI agents You design and implement text-to-SQL agents on the data warehouse, from retrieval and prompt strategy over query generation and validation to evaluation pipelines that measure answer accuracy You specify ontologies and business glossaries for the mobility domain (rental, fleet, pricing, customer) and publish them in machine-readable form so agents and services can consume them You integrate semantic context, metadata, and lineage from our data catalogue into agent workflows, and define the standards that make datasets "agent-ready" You partner closely with data engineers, analysts, and our AI platform teams, evangelize semantic modeling best practices, and mentor engineers across the platform organization You continuously evaluate emerging tooling (semantic layer engines, knowledge graphs, LLM frameworks) and drive build-vs-buy decisions YOUR SKILLS MATTER Education You have B.Tech, B.E, or Master's degree in Computer Science or a closely related discipline Experience You bring 9+ years in analytics/data engineering, including hands-on experience building a semantic or metrics layer (e.g. dbt Semantic Layer, Cube, AtScale, LookML) and productionizing LLM based applications, ideally text-to-SQL or RAG systems Tech Stack You are highly proficient in SQL and Python; you have worked with modern cloud data warehouses (Redshift, Snowflake, or Databricks) on AWS, and with LLM frameworks and APIs (e.g. LangChain, Bedrock, Anthropic API) Semantic Modeling You have experience in dimensional and semantic data modeling is a Big plus; Knowledge of ontology standards (RDF, OWL, SKOS), knowledge graphs, or MCP-based agent context is again an advantage Ways of Working You work with engineering best practices (Git, CI/CD, code reviews, testing), take ownership end-to-end, and communicate complex concepts clearly to technical and business stakeholders WHAT WE OFFER Grow Further, Go Further Advance your skills and unlock your potential with our Education Assistance Program AI Excellence With Claude by Anthropic and SIXTgpt, our own AI platform, you work with state-of-the-art AI tools from day one, with the freedom to try new technologies and use AI to work faster and smarter Balance Your Career Benefit from a hybrid work environment complemented by flexible working hours Fuel Your Day Great work deserves great fuel — enjoy meal benefits that keep you energised and ready to bring your A-game Your Wellness Matters We are committed to your well-being through comprehensive insurance, wellness programs, health checkups, and fitness benefits Recognition That Counts We create a culture of appreciation, rewarding your impact through referral incentives and loyalty perks as you grow with us Growing Families, Growing Joy As your family grows, we are here to celebrate with a special newborn gift for your little one About us: We are a globally leading mobility service provider with a revenue of €4.00 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 350,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 110 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight. Get started with us and apply now!

Every SIXT rental starts on the web — search, offer, checkout — a funnel that serves millions of customers across 110+ countries. How we build it has changed: coding was never the bottleneck, judgment is. Engineers here turn ambiguous product problems into specifications precise enough for AI agents to execute, drive those agents in small, verifiable steps, and personally own what reaches production — backed by the technical depth to read, debug, and stand behind every change. It's a different kind of engineering, and we're not done shaping it. Join Team Orange and help shape how it gets built. YOUR ROLE AT SIXT Turn ambiguous product problems into clear, testable specifications — success criteria and edge cases spelled out — that agents can execute against Work with AI tools, adapt and improve agentic ecosystem by building strong guardrails and processes that keeps the product stable Drive agents in small, verifiable steps, correcting and re-steering when the output drifts from intent Own what your agents ship to production: debug to root cause, and encode prevention — a test, a lint rule, an agent constraint — so the same issue is caught automatically next time Ship medium-to-complex features end-to-end with minimal guidance Deliver production-quality, reusable React components and integrate reliably with backend YOUR SKILLS MATTER Bachelor's/Master's in Computer Science or a related field, with 3–6 years of frontend software engineering experience Strong React.js — component contracts, state management, rendering/performance behavior — with a solid grasp of how the browser parses, renders, and paints a page, enough to guide AI toward semantic, accessible HTML. Depth is important: it lets you review and trust agent output Proficient with HTML, CSS, JSON, build tools, and Git, with excellent debugging skills. Treats cross-browser compatibility and measurable frontend performance as defaults, not afterthoughts Sets up agentic workflows: delegates well-scoped tasks to AI agents, reviews output critically for correctness, standards, and architectural drift, recognises low-value output and course-corrects before it merges — and can explain any of it Shares agent workflows to speed up the team and onboard them on good AI practices, discuss trade-offs in reliability, performance, and correctness with the team Good problem-solving and communication with strong ownership across execution and delivery: collaborates with Product/peers, challenges unclear framing, builds judgment on architecture and outcomes WHAT WE OFFER A Global Tech Hub in Lisbon Join a thriving international tech community and work alongside engineers, product experts, and business teams who turn ideas into real impact. Our hubs at Factory Lisboa in Beato and ARTs Lisboa in Parque das Nações are where great tech gets built Learning & Knowledge Exchange Level up through regular events with internal and external speakers. We value curiosity, continuous learning, and open exchange – across teams, disciplines, and borders Flexible Work Setup Two office days a week, flexible hours, and modern spaces built for both deep focus and team collaboration – work the way that brings out your best Time Off & Wellbeing Enjoy 28 vacation days per year, an additional day off on your birthday, one volunteer day annually, and private health insurance that also covers your spouse and children free of charge Practical Everyday Benefits Get a yearly Coverflex allowance and a daily meal allowance to make everyday life a little easier SIXT Perks Get exclusive rates on all SIXT services, with special discounts extended to your family and friends. Because great perks are even better when you can share them About us: We are a globally leading mobility service provider with a revenue of €4.00 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 350,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 110 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight. Get started with us and apply now!

Machine Learning Engineering at SIXT turns models into systems that decide prices, forecast demand, and steer a fleet of hundreds of thousands of vehicles, millions of times a day. You build these systems with our Data Scientists, run them in production, and shape the ML platform while it is still being built. The numbers you move are real. Transform the way the world moves, because people expect better. Join Team Orange in Lisbon. YOUR ROLE AT SIXT You build ML systems together with Data Scientists, from the first design session to the validated outcome in production. One team, one goal You own design and architecture: how features are computed once and served consistently, how predictions flow out, how training, serving, and retraining fit together You get models live safely: offline evaluation, shadow runs, champion/challenger, rollback. You run what you ship You make quality structural: you define what a healthy ML system looks like, encode it as automated checks and alerts, and root cause issues so they do not recur You are the bridge to MLOps: you bring the team's needs to the platform, bring platform standards back into the team, and co-own the templates and tooling that make the next use case faster You multiply the team You set the engineering bar, design how coding agents execute the ML lifecycle from data preparation to deployment, and grow production practice together with Data Scientists YOUR SKILLS MATTER Experience You have shipped and operated ML systems in production for 3+ years and know where they break: training/serving skew, leakage, drift, silent degradation Software Engineering You are fluent in Python, SQL and one more language such as Go or Java: you read, review, and debug production code with confidence, whatever agent wrote it ML Systems Design You design clean contracts between data, model, and consumers and reason about latency, cost, and failure ML Fundamentals You understand forecasting, regression, and optimization well enough to challenge a model design and to recognize a wrong model in production Software Factory You define acceptance criteria, orchestrate coding agents for implementation, QA, and security, and step in where they fall short. You review outcomes, not keystrokes, and want to shape how a team works this way Platform Containers, orchestration, CI/CD, and model registries are daily tools. You have worked hands on in a major cloud platform, ideally AWS. Infrastructure as code is a plus Team Spirit You act as a partner to Data Science, Product and Engineering, not a ticket executor: you challenge unclear framing, explain trade offs in business terms, and communicate fluently in English across cultures WHAT WE OFFER A Global Tech Hub in Lisbon Join a thriving international tech community and work alongside engineers, product experts, and business teams who turn ideas into real impact. Our hubs at Factory Lisboa in Beato and ARTs Lisboa in Parque das Nações are where great tech gets built Learning & Knowledge Exchange Level up through regular events with internal and external speakers. We value curiosity, continuous learning, and open exchange – across teams, disciplines, and borders Flexible Work Setup Two office days a week, flexible hours, and modern spaces built for both deep focus and team collaboration – work the way that brings out your best Time Off & Wellbeing Enjoy 28 vacation days per year, an additional day off on your birthday, one volunteer day annually, and private health insurance that also covers your spouse and children free of charge Practical Everyday Benefits Get a yearly Coverflex allowance and a daily meal allowance to make everyday life a little easier SIXT Perks Get exclusive rates on all SIXT services, with special discounts extended to your family and friends. Because great perks are even better when you can share them About us: We are a globally leading mobility service provider with a revenue of €4.00 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 350,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 110 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight. Get started with us and apply now!

At SIXT, we are engineering the future of mobility, one system at a time. As a Senior Backend Engineer in our Data Science Finance team, you will develop the systems that power the full financial risk steering cycle. This is a role where backend engineering meets real-world operations at scale, in a team that builds with purpose and moves with pace. If this sounds like your next move, apply now! YOUR ROLE AT SIXT You build ML powered systems together with Data Scientists and ML Engineers, from the first design session to the validated outcome in production, with one team working toward one goal You understand the business and the processes to build solutions and not only write code You design and build robust backend services in Go that power the risk steering cycle and decision-making workflows You are responsible for designing, developing, and operating end-to-end distributed systems on the cloud You participate in code reviews, contribute to team knowledge sharing and maintain documentation You work on event-driven systems and keep yourself up to date with the latest technologies to help you create scalable and resilient software YOUR SKILLS MATTER Education You hold a B.Tech, B.E., or Master's Degree in Computer Science or a closely related discipline Tech Stack You bring strong, production-proven experience in Go, plus confidence in at least one more language such as Python or Java Experience You have 7+ years of experience working in sophisticated technology environments such as building cloud-native applications, solving scalability challenges, designing event-driven solutions, and good to have working experience in ML-powered products Cloud You have already designed or operated distributed systems and microservices architectures, with a clear understanding of the trade-offs that come with operating at scale, and experience working with cloud providers (AWS or similar) Tools & Systems You have good understanding of event-driven platforms, pub-sub and messaging using brokers such as Kafka, NSQ or RabbitMQ Mindset You have a product-oriented mindset and attention to detail Team Spirit You act as a partner to Risk, Engineering, and Data Science; you challenge unclear framing, explain trade-offs in business terms, and communicate fluently WHAT WE OFFER Grow Further, Go Further Advance your skills and unlock your potential with our Education Assistance Program AI Excellence With Claude by Anthropic and SIXTgpt, our own AI platform, you work with state-of-the-art AI tools from day one, with the freedom to try new technologies and use AI to work faster and smarter Balance Your Career Benefit from a hybrid work environment complemented by flexible working hours Fuel Your Day Great work deserves great fuel: enjoy meal benefits that keep you energised and ready to bring your A-game Your Wellness Matters We are committed to your well-being through comprehensive insurance, wellness programs, health checkups, and fitness benefits Recognition That Counts We create a culture of appreciation, rewarding your impact through referral incentives and loyalty perks as you grow with us Growing Families, Growing Joy As your family grows, we are here to celebrate with a special newborn gift for your little one About us: We are a globally leading mobility service provider with a revenue of €4.00 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 350,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 110 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight. Get started with us and apply now!

We work at the intersection of pricing science, offer personalisation, advanced statistics, and scalable software. You'll build and bring into production state-of-the-art probabilistic models - like hierarchical Bayesian regression, SVI, or bandit algorithms - that power millions of pricing and offer decisions at SIXT every day. Beyond pricing, we're building the intelligence layer that decides which offer and which experience each customer sees, so your models shape both what we charge and what we show. From shaping the analytical question to deploying live models, you'll own the full lifecycle, supported by an innovation-friendly culture and great team. If you're excited by real-world impact, rigorous methods, and turning cutting-edge ideas into production - even if you don't tick every box - we'd love to hear from you! YOUR ROLE AT SIXT You architect and prototype advanced regression models (linear, GLM, mixed-effects, Gaussian Process) with a principled Bayesian approach, guiding pricing strategy at scale You design and productionise personalisation and recommendation systems - two-tower retrieval, embedding-based candidate generation, learning-to-rank, sequential/transformer models - with contextual bandits and off-policy evaluation to keep them learning from real interactions You apply techniques like SVI, MCMC, and importance sampling to enable robust decision-making under uncertainty, even with sparse, high-volume, or streaming data You build and maintain reproducible pipelines for feature engineering, label generation, and automated data validation using tools like Airflow or Dagster, ensuring high code quality and reliability You deploy models via FastAPI, Docker, or Kubeflow, and establish real-time monitoring with Bayesian control charts and performance dashboards to catch drift and anomalies early You design sophisticated A/B and multivariate tests, apply quasi-experimental and causal impact methods, and quantify the value of information to balance exploration and exploitation You collaborate with product, revenue, and customer experience leaders to translate ambiguous ideas into testable hypotheses, while mentoring peers and elevating Bayesian practice through internal publications and workshops YOUR SKILLS MATTER Expertise You bring deep statistical chops, with 5+ years of applying regression, hierarchical models, or state-space methods in production Computing proficiency You have a well-stocked Bayesian toolbelt - fluent in PyMC, Stan, NumPyro, TFP, or similar - and are comfortable writing custom likelihoods and priors Modeling You have proven experience scaling inference using SVI, black-box VI, or advanced MCMC techniques on large datasets Personalisation (nice to have) You have experience with recommender and personalisation stacks - two-tower / embedding retrieval, learning-to-rank, sequential models, contextual bandits - plus counterfactual or off-policy evaluation to prove incremental value rather than optimise click-through Engineering practices You write solid, production-grade Python code and are familiar with type hints, testing frameworks, and CI/CD workflows Infrastructure You are hands-on with cloud platforms like AWS, GCP, or Azure, and have experience with containerization (Docker/K8s) and workflow orchestration Stakeholder management You communicate uncertainty, lift, and risk in plain English for executives, while engaging deeply with scientists and engineers WHAT WE OFFER A Global Tech Hub in Lisbon Join a thriving international tech community and work alongside engineers, product experts, and business teams who turn ideas into real impact. Our hubs at Factory Lisboa in Beato and ARTs Lisboa in Parque das Nações are where great tech gets built Learning & Knowledge Exchange Level up through regular events with internal and external speakers. We value curiosity, continuous learning, and open exchange – across teams, disciplines, and borders Flexible Work Setup Two office days a week, flexible hours, and modern spaces built for both deep focus and team collaboration – work the way that brings out your best Time Off & Wellbeing Enjoy 28 vacation days per year, an additional day off on your birthday, one volunteer day annually, and private health insurance that also covers your spouse and children free of charge Practical Everyday Benefits Get a yearly Coverflex allowance and a daily meal allowance to make everyday life a little easier SIXT Perks Get exclusive rates on all SIXT services, with special discounts extended to your family and friends. Because great perks are even better when you can share them About us: We are a globally leading mobility service provider with a revenue of €4.00 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 350,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 110 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight. Get started with us and apply now!

Join our team of data science and machine learning experts to shape next-generation fleet strategies. We answer one of the most impactful questions in our business: how many cars of each type should be in each location, at any point in time? Our long-term fleet planning decisions directly drive revenue management, purchasing, and pricing across the business — and ensure we have the right cars in the right places to deliver the best experience for every customer. We're looking for a Senior Data Scientist – Operations Research with a strong background in mathematical optimization and machine learning — someone with both a solid theoretical foundation and a proven track record of applying these methods in practice. Ideally, you also bring revenue management expertise, for example hands-on experience in dynamic pricing or stock planning optimization. YOUR ROLE AT SIXT You design, develop, and deploy advanced fleet planning systems that support all parts of the business, from purchasing decisions to pricing to financial projections You formulate and solve complex optimization problems, including linear, nonlinear, dynamic, and stochastic, to maximize margin and support key decision making processes You plan decisions that affect stakeholders across the business, and explaining the why behind the results is just as important as the results themselves You build models that capture the real world complexity of renting cars, from how pricing decisions are made to how cars are allocated to customers You stay current on the latest research in revenue management, operations research, and machine learning, and bring new ideas into the team You provide mentorship and guidance to junior team members YOUR SKILLS MATTER Optimization & Solvers You bring a strong background in mathematical optimization, including linear, nonlinear, and integer programming, solvers, and algorithm design such as dynamic and stochastic programming Education You hold a Master's degree or higher in Operations Research, Applied Mathematics, Statistics, or a related quantitative field Machine Learning You have a solid understanding of supervised and unsupervised ML techniques, model evaluation, and how to take a model from experimentation to a reliable, maintainable production system Programming Skills You bring expertise in Python for data analysis, modeling, and production deployment AI Proficiency You use AI tools to accelerate development and analysis, stay up to date with the latest developments, and actively drive adoption across the team Analytical Mindset You translate complex problems into actionable models and analyses, and communicate findings clearly to different audiences Revenue Management Expertise (Plus) You have experience implementing or optimizing revenue management or stock optimization systems WHAT WE OFFER The SIXT Lisbon Experience Two of Lisbon's most exciting hubs — Factory Lisboa in Beato and ARTs Lisboa in Parque das Nações — are where you'll find your new home base. Expect a fast-paced, international atmosphere where ideas flow freely, people genuinely look out for each other, and no two days feel quite the same Community & International Environment Join a truly global workplace with colleagues from many nationalities. Regular team events, community activities, and inspiring talks with internal and external speakers make our Lisbon hubs more than just an office Flexibility & Modern Work Setup Benefit from a hybrid working model with two office days per week and flexible working hours. Our modern offices are designed for collaboration while allowing you the flexibility to work in the way that suits you best AI at your fingertips From day one, you'll have access to Claude by Anthropic and SIXTgpt, SIXT's own AI platform, to supercharge your work. We invest in every team member's AI journey: encouraging experimentation, building knowledge, and making sure you're ahead of the curve Time Off & Wellbeing Enjoy 28 vacation days per year, an additional day off on your birthday, one volunteer day annually, and private health insurance that also covers your spouse and children free of charge Everyday Benefits Receive a yearly Coverflex allowance and a daily meal allowance to make life a little easier every day Employee Perks Get exclusive rates on all SIXT services, with special discounts extended to your family and friends. Because great perks are even better when you can share them About us: We are a globally leading mobility service provider with a revenue of €4.00 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 350,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 110 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight. Get started with us and apply now!

Join our Data Science team and help shape SIXT's Customer Service Transformation. Our AI assistant CARA authenticates customers, manages real reservations, and handles policy questions across 10+ markets and 7 languages. She's a production multi-agent system with write access to SIXT's booking platform, running on chat, app, WhatsApp, and soon voice. Your work will impact millions of customers and deliver measurable business results. YOUR ROLE AT SIXT You own agents end to end: prompt, orchestration graph, tools, evals, deployment, dashboard. You write the agent logic and watch your own traces in production You translate business problems into agent capabilities, working with product, business and customer service stakeholders to define tool calls and sub-agents, and you build for real transactions with step-up authentication, guardrails, idempotent case handling, and handover into Salesforce and Genesys You make quality measurable, extending our evaluation harness with LLM-as-judge rubrics, tool-trajectory assertions and prompt A/B suites that gate every release You engineer for cost and latency as much as accuracy: multi-provider model routing with fallbacks, prompt caching, small models where small models win You collaborate across the stack with software engineers, data scientists, MLOps and platform teams, balancing bespoke agent logic against reusable platform capability, and you raise the floor around you by sharing agentic and LLM engineering knowledge with colleagues and helping other teams integrate Agentic AI into their products You work with the following stack context: Python with LangGraph and LangChain, deployed as containerised agents on AWS Bedrock AgentCore with MCP sub-agents and OpenAPI tool federation. Multi-provider fallback chains with Anthropic and OpenAI LLMs behind Bedrock Guardrails. Next: CARA for Voice YOUR SKILLS MATTER Engineering foundation You're an engineer first with strong, hands-on software engineering, real production ownership, excellent Python skills, and solid AWS cloud experience Agentic experience You have built tool-calling agents with LangGraph/LangChain or equivalent frameworks and shipped them to actual users rather than keeping them in notebooks Model and prompt expertise You're hands-on with frontier and open models like Anthropic Claude, OpenAI, AWS Bedrock, and open-source models such as Llama, with a clear point of view on when to use which, and you treat prompt engineering as an engineering discipline: versioned, reviewed, evaluated, A/B tested LLMOps paradigm You know and have applied LLMOps: tracing, evals, guardrails, token and latency budgets, continuous integration and deployment Bonus skills MCP, real-time voice AI (WebRTC, SIP, streaming STT/TTS), event-streaming pipelines, TypeScript/React, or contact-centre platforms like Genesys and Salesforce add value Motivation and communication You're extremely motivated, passionate about learning, bring a genuine can-do attitude, communicate fluently in English, and appreciate cultural diversity WHAT WE OFFER A Global Tech Hub in Lisbon Join a thriving international tech community and work alongside engineers, product experts, and business teams who turn ideas into real impact. Our hubs at Factory Lisboa in Beato and ARTs Lisboa in Parque das Nações are where great tech gets built Learning & Knowledge Exchange Level up through regular events with internal and external speakers. We value curiosity, continuous learning, and open exchange – across teams, disciplines, and borders Flexible Work Setup Two office days a week, flexible hours, and modern spaces built for both deep focus and team collaboration – work the way that brings out your best Time Off & Wellbeing Enjoy 28 vacation days per year, an additional day off on your birthday, one volunteer day annually, and private health insurance that also covers your spouse and children free of charge Practical Everyday Benefits Get a yearly Coverflex allowance and a daily meal allowance to make everyday life a little easier SIXT Perks Get exclusive rates on all SIXT services, with special discounts extended to your family and friends. Because great perks are even better when you can share them About us: We are a globally leading mobility service provider with a revenue of €4.00 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 350,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide. Together with our franchise partners, we are present in more than 110 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long-term stability and align our corporate strategy with foresight. Get started with us and apply now!