Contractor job Software development engineer test SDET M/W

Luxembourg

HAYS France

Job position Software development engineer test SDET M/W

Contractor

As soon as possible

12 months

€500-650

5 to 10 years experience

Luxembourg

Published on 12/02/2026

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You will be part of a Software Development team (Java, Javascript, Python, and Typescript developers)

Enhance overall functional performance across mission‑critical applications.
Develop, maintain, and optimize robust automated testing frameworks (unit, integration, end‑to‑end).
Ensure the highest level of product quality through proactive testing and continuous improvement.
Apply strong Java software development expertise to build scalable, secure, and maintainable solutions.
Collaborate with cross‑functional teams (DevOps, Product, Architecture) to deliver high‑value features.
Identify defects early in the development cycle and drive root‑cause analysis with relevant teams.
Implement best practices in code quality, performance optimization, and technical documentation.
Participate in code reviews, propose architectural improvements, and support continuous delivery processes.
Contribute to the evolution of CI/CD pipelines to reinforce testing automation and deployment reliability.
Monitor application behavior and performance, suggesting improvements to enhance user experience.

Candidate profile

Main skills :

4 years in SDET domain with the focus on REST API and Web UI Testing

Strong programming skills in Java, Python, JavaScript / Typescript

Good understanding of REST APIs, Microservices and Web UI testing; software development principles, object-oriented programming, and design patterns

Experience with testing frameworks (Junit, TestNG, Cypress, Playwright, PyTest)

Familiarity with CI/CD tools (Gitlab)

Knowledge of Cloud platforms (Azure)

Familiarity with containerization (Docker, Kubernetes)

Working environment

Hays is looking for a Software Development Engineer in Test.

Freelance contract or permanent contract via a payrolling company

English fluent is mandatory

No full remote

Discover HAYS France

Paris, France

250 - 999 employees

Head hunter

Hays, leader mondial du recrutement spécialisé, est expert du recrutement des professionnels qualifiés et compétents à travers le monde. Nous comptons 11 000 salariés dans 236 bureaux à travers 33 pays et couvrant 26 secteurs d’activité. Hays opère sur les marchés suivants : Allemagne, Australie, Autriche, Belgique, Brésil, Canada, Chili, Chine continentale, Colombie, Danemark, Émirats Arabes Unis, Espagne, États-Unis, France, Hongrie, Inde, Irlande, Italie, Japon, Luxembourg, Malaisie, Mexique, Nouvelle-Zélande, Pays-Bas, Pologne, Portugal, République Tchèque, Roumanie, Royaume-Uni, Singapour, Suède, Suisse et Thaïlande. Fort de son développement et de sa croissance, Hays France & Luxembourg compte aujourd’hui plus de 800 salariés répartis au sein de 22 bureaux au total : Aix-en-Provence, Amiens, Biarritz, Bordeaux, Clermont-Ferrand, Dijon, Grenoble, La Rochelle, Lille, Lyon, Montpellier, Nancy, Nantes, Nice, Paris, Reims, Rennes, Rouen, Strasbourg, Toulouse, Tours et au Luxembourg. En tant qu'entreprise qui place l'humain au premier plan, nous donnons aux personnes talentueuses les moyens d'avancer dans leur carrière, en les aidant à décrocher le poste ou le projet qui correspond à leurs compétences et à leurs aspirations

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Software development engineer test SDET M/W

HAYS France