Fullstack Developer (m/f)

About the mission

For a mission at one of our clients in Luxembourg, Novatraqr is looking for a Fullstack Developer to build modern web applications within one of the client's product squads. The frontend is Angular-only, organized as micro frontends, with heavy use of RxJS and reactive programming. On the backend you will work on Node.js (NestJS) and Spring Boot services, with OpenSearch powering search and data exploration features.

Key responsibilities

• Design and develop Angular applications structured as micro frontends, from component design to integration.
• Write clean, reactive frontend code using RxJS and Observables (state management, streams, async data flows).
• Develop and maintain backend services in Node.js with NestJS and in Java with Spring Boot.
• Implement search, indexing and aggregation features on top of OpenSearch.
• Write automated tests (unit, integration) and participate actively in code reviews.
• Contribute to technical design discussions within the squad and estimate work during sprint ceremonies.
• Ensure the quality, performance and maintainability of the features you deliver, from development to production.

Technical environment

Frontend Angular (exclusive), micro frontend architecture, RxJS / Observables, TypeScript
Backend Node.js, NestJS, Java, Spring Boot
Search & data OpenSearch
Delivery Git, CI/CD pipelines, containerized deployments (Docker / Kubernetes)

Your profile

• Solid experience (typically 3+ years) as a fullstack or frontend-leaning developer with strong Angular expertise.
• Deep understanding of RxJS and reactive programming patterns — Observables are your daily tool, not a mystery.
• Experience with micro frontend architectures, or a strong grasp of modular frontend design and willingness to ramp up fast.
• Backend experience with Node.js/NestJS and/or Spring Boot; you are comfortable navigating both ecosystems.
• Familiarity with OpenSearch or Elasticsearch is a strong plus.
• Quality-minded: testing, code reviews and clean code are part of how you work.
• Team player, at ease in a Scrum squad, communicating openly about progress and blockers.
• Fluent in English; French is an asset.

Nice to have

• Experience with module federation or other micro frontend integration techniques.
• Exposure to CI/CD tooling (Jenkins, ArgoCD) and cloud platforms (AWS).
• Knowledge of accessibility and frontend performance optimization.

How we work

• Join one of the client's cross-functional squads (product owner, developers, QA) working with the Scrum methodology: sprint planning, daily stand-ups, reviews and retrospectives.
• Collaborate closely with the other squads and transversal roles (architecture, security, operations) to keep
alignment across the client's platform.
• Represent Novatraqr's quality standards on site: code reviews, documentation, knowledge sharing and a professional, delivery-oriented attitude.

Mission details

• Location: Luxembourg, on the client's site.
• Duration: Long-term mission.
• Methodology: Scrum, within an established squad organization.