Sopra Steria

IT consulting, digital services, and transformation

Tech Lead Fullstack Java React - Services Financiers, Ile-De-France

Full-Stack EngineeringConfirmed live in the last 24 hours

Full-timeÎle-de-France, France

About the Job

Requirements

A degree from an engineering school, university education, or equivalent is required.
At least 7 to 10 years of experience, including at least 2 years in a Tech Lead role.
Demonstrated expertise in Java and React.js on critical systems.
Ability to design a complete backend and frontend architecture.
Advanced proficiency in Kafka, microservices, CI/CD, and containerization.
Experience in high-volume or high-complexity environments.
Expert-level Java development, including Java 17 or later and Spring Boot 3 or later.
Knowledge of event-driven architecture; Kafka is mandatory.
Experience designing and maintaining REST APIs, API versioning, and performance.
Experience with SQL storage, PostgreSQL or Oracle, query optimization, and transactions.
Knowledge of OAuth2, OIDC, JWT, role-based access control, and endpoint hardening.
Experience developing single-page applications with React 18 or later, TypeScript, and Redux Toolkit.
Experience integrating design systems, such as an internal system or Material UI.
Experience with complex state management and rendering and hydration optimization.
Experience testing with Cypress and Jest.
Experience with CI/CD pipelines using GitLab CI or Jenkins and Docker artifacts.
Experience deploying to Kubernetes using Helm or Kustomize.
Experience with observability tools such as Grafana, Prometheus, and ELK, and distributed tracing.
Knowledge of Clean Code and test-driven development, and experience with automated test coverage.

Responsibilities

Take technical responsibility for a complete application scope across backend and frontend.
Supervise and coach 4 to 10 developers and support their skills development.
Define application architecture, establish good practices, and ensure performance, maintainability, and scalability of distributed applications.
Design cloud-ready microservices architectures.
Define technical standards, including patterns, API conventions, and security standards; domain-driven design is optional.
Challenge technical choices and validate strategic directions with architecture stakeholders.
Translate business needs into robust, scalable technical solutions.
Ensure code quality through systematic reviews and pair or mob programming.
Lead the technical roadmap, manage technical debt, and coordinate releases.
Ensure service continuity through monitoring, performance, and availability management.
Design and maintain REST APIs, including versioning and performance.
Develop single-page applications and integrate design systems.
Implement tests and automated coverage.
Deploy applications to Kubernetes and support observability, including distributed traces.

Desired Qualifications

Domain-driven design (DDD) is optional.

Description du poste

Votre rôle et mission :

Prendre la responsabilité technique d’un périmètre applicatif complet (backend + frontend), encadrer les développeurs, définir l'architecture, sécuriser les bonnes pratiques et garantir la performance, la maintenabilité et la scalabilité des applications distribuées Java / React.js.

Responsabilités clés

Architecture & Conception

Concevoir des architectures cloud-ready en microservices (Java 17+, Spring Boot 3+).
Définir les standards : patterns, DDD (facultatif), conventions API, normes de sécurité.
Challenger les choix techniques, valider les orientations stratégiques avec l’architecture.
Traduire les besoins métier en solutions techniques robustes et scalables.

Leadership & Delivery

Encadrer 4 à 10 développeurs (coaching, montée en compétences).
Garantir la qualité du code : revue systématique, pair/mob-programming.
Piloter la roadmap technique, gérer la dette, orchestrer les releases.
Assurer la continuité de service : supervision, performances, disponibilité.

Backend — Java (expert)

Développement de microservices Java 17+ / Spring Boot 3+.
Architecture event‑driven : Kafka impératif.
Conception et maintien d’API REST, gestion du versioning, performance.
Stockage SQL (PostgreSQL / Oracle), optimisation de requêtes, transactions.
Sécurité : OAuth2, OIDC, JWT, RBAC, durcissement des endpoints.

Frontend — React.js

Développement SPA avec React 18+, TypeScript, Redux Toolkit.
Intégration Design System (interne, Material UI ou équivalent).
Gestion d’état complexe, optimisation du rendering & hydration.
Mise en place de tests : Cypress, Jest.

DevOps / Qualité

Pipelines CI/CD avancés : GitLab CI / Jenkins, artefacts Docker.
Déploiement Kubernetes (Helm / Kustomize).
Observabilité : Grafana, Prometheus, ELK, traces distribuées.
Pratiques d'ingénierie : Clean Code, TDD, couverture automatisée.

Qualifications

Vous êtes diplômé(e) d'une école d'Ingénieur ou d'une formation Universitaire ou équivalent.

7 à 10 ans d’expérience minimum dont 2+ ans en rôle de Tech Lead.
Expertise démontrée en Java + React.js sur des systèmes critiques.
Capacité à concevoir une architecture complète (backend + frontend).
Maîtrise avancée de Kafka, microservices, CI/CD, conteneurisation.
Habitué(e) aux environnements à forte volumétrie ou forte complexité.

Informations supplémentaires

Un accord télétravail pour télétravailler jusqu’à 2 jours par semaine selon vos missions.
Un package avantages intéressant : une mutuelle, un CSE, des titres restaurants, un accord d’intéressement, des primes vacances et cooptation.
Des opportunités de carrières multiples : plus de 30 familles de métiers, autant de passerelles à imaginer ensemble.
Plusieurs centaines de formations accessibles en toute autonomie avec Sopra Steria Academy.
La possibilité de s'engager auprès de notre fondation ou de notre partenaire « Vendredi ».
L'opportunité de rejoindre le collectif Tech'Me UP (formations, conférences, veille, et bien plus encore…).

Employeur inclusif et engagé, notre société œuvre chaque jour pour lutter contre toute forme de discrimination et favoriser un environnement de travail respectueux. C’est pourquoi, attachés à la mixité et à la diversité, nous encourageons toutes les candidatures et tous les profils.

https://www.soprasteria.fr/nous-connaitre/nos-engagements

About the Company

Sopra Steria

IT consulting, digital services, and transformation

Sopra Steria provides consulting, digital services and solutions to help large organizations transform their business through technology. Its offerings cover strategy, systems integration, cloud, cyber security, software development, and managed services, designed to be delivered end to end—from assessing needs and designing a plan to implementing and operating IT systems. The company combines deep knowledge of many industries with a collaborative approach to tailor projects to each client and to deliver measurable, sustainable improvements in performance. Differentiators include its European scale (about 51,000 employees across roughly 30 countries), broad scope—from strategy to operation—and emphasis on practical outcomes that help clients stay competitive. The group’s goal is to put digital to work for its clients in a way that creates a positive, more productive future for all stakeholders.

Company size: 10,001+
Company stage: IPO
Headquarters: Paris, France
Founded: 1968

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