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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Java fullstack engineer - **Company:** Just Eat Takeaway.com - **Location:** Amsterdam, Netherlands - **Contract:** Permanent contract - **Skills:** Java (Programming Language), JavaScript (Programming Language), .NET Framework, Amazon Web Services, User Authentication, Cloud Computing, Fault Tolerance, Identity and Access Management, Information Systems Security Architecture Professional, Python (Programming Language), OAuth, Open Source Technology, OpenID, Role-Based Access Control, Openid Connect, Security Assertion Markup Language (SAML), TypeScript, Scripting, Okta, ReactJS, System Availability, Backend, Kotlin, Kubernetes, Front End Software Development, Docker, Microservices - **Published:** September 25, 2026 - **Apply:** https://nl.talent.com/redirect?id=638646960570174697&source=vacant&utm_medium=xml&utm_campaign=marketing&utm_product=vacantnew_bulk&oapply=org_v2026-09&puid=edaaaddddda8addabddc9ddaedd7addaadagbddb9dd99ddgbddfadd9bdacaddacdd79dd9bea3addffddgaed2dddgaddgfddgaddgaddg9ddg6ed3gc9bbb9b3bee3ee33def3de93de73deggddegddafddd3dea3deagddg3ee33de93deg3ee33ee33deg3ee33ee33ee33ee33ee33ee3&pos=1&xml_batch_generation_id=b266a1b3-e088-448e-abe7-997b6e9418f0&falcon=1&pid=becc6efa5715&bpid=981be4bf4090d6255016ed1a66efa4c9 ## About the Role * Solid Java Backend Experience: Commercial experience in backend engineering, with a strong primary focus on Java, and comfort working in a polyglot environment (Go, Kotlin). * Domain Knowledge in AuthN & AuthZ: Hands-on experience with identity protocols (OAuth 2.0, OpenID Connect, SAML) and custom/open-source identity providers such as Keycloak. * Frontend Capabilities: Nice to have hands-on proficiency or willing to work with React (JavaScript/TypeScript) to deliver modern, end-to-end full-stack solutions. * Cloud & Container Experience: Experience operating services in production with Kubernetes (k8s), Docker, and AWS cloud services. * SDK & Scripting Versatility: Familiarity or comfort working with .NET (for internal client SDK maintenance) and Python (for automation and tooling). * AI-Assisted Development & SRE Mindset: Comfortable leveraging AI coding assistants to accelerate development, paired with an operational mindset focused on monitoring and reliability. ## Description Our mission? To empower every food moment around the world, whether it's through customer service, coding, or couriers. The Opportunity: We are looking for a proactive software engineer with a strong backend foundation and full-stack capabilities to join our Identity & Access Management (AuthN/AuthZ) team. As a Full-Stack Engineer, you will bring solid experience in security architectures, identity systems, and distributed microservices to the table. In this role, you will be instrumental in building high-throughput authorization services, extending enterprise authentication workflows, maintaining developer SDKs, and delivering intuitive frontend interfaces for our global ecosystem. In this role you'll have the responsibility to: * Build & Scale Identity Services: Design, develop, and maintain enterprise Authentication infrastructure built primarily on Java and Keycloak, alongside high-concurrency Authorization microservices in Go and Kotlin. * Deliver End-to-End Features (React): Build clean, secure, and responsive frontend applications and admin dashboards using React to support seamlessly integrated user and partner identity journeys. * Support Polyglot Ecosystems & Tooling: Support client-side .NET SDKs and write Python automation scripts to streamline developer onboarding, authorization checks, and ops automation across JET teams. * Drive Cloud Infrastructure & Reliability: Package, deploy, and scale microservices using Docker, Kubernetes (k8s), and AWS, ensuring high availability, fault tolerance, and tight security controls. * Elevate Technical Standards: Implement modern security patterns (OAuth2, OIDC, RBAC/ABAC), adhere to observability standards, and actively participate in collaborative architectural reviews and team knowledge sharing. ## Related Videos - [2021: Familiar APIs on Kickass Runtimes #slideless](https://www.wearedevelopers.com/videos/102-2021-familiar-apis-on-kickass-runtimes-slideless) - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) - [Delay the AI Overlords: How OAuth and OpenFGA Can Keep Your AI Agents from Going Rogue](https://www.wearedevelopers.com/videos/1637-delay-the-ai-overlords-how-oauth-and-openfga-can-keep-your-ai-agents-from-going-rogue) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) ## Related Articles - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe)