OPEN

About the Company

Bienvenue sur la Page LinkedIn d'Open ! Plus de 1200 nouveaux collaborateurs en 2025 ! #1200byOpen Avec 4000 collaborateurs et un chiffre d’affaires de 420 M€ en 2024, Open se positionne comme le partenaire de confiance, l'industriel de l'innovation qui accompagne les grands acteurs privés et publics dans leur transformation IT & Digitale, afin d’accroitre leur compétitivité. Open opère principalement en France et à l’international au Luxembourg et Roumanie. Comment ? En apportant une proposition de valeur centrée sur la modernisation des écosystèmes applicatifs et des infrastructures, l'intégration de plateformes technologiques, le déploiement de nos solutions SaaS et la mise en œuvre de l’Intelligence Artificielle au cœur de la dynamique d’innovation, pour créer de nouveaux leviers de performance et d’anticipation. Open inscrit sa raison d’être dans une logique d’avenir « Faire du numérique le vecteur de transformation d'un monde plus humain et durable » en cohérence avec ses valeurs d’entreprise : Agilité, Responsabilité, Engagement. #WeAREOpen

Listed Jobs

Company Name

OPEN

Job Title

Ingénieur de production F/H

Job Description

**Job Title** Production Engineer (F/M) **Role Summary** Manage the lifecycle of applications in production: integration, deployment, monitoring, and incident handling to ensure high availability and performance. **Expectations** - First‑hand experience in IT production environments. - Curiosity, analytical rigor, strong interpersonal skills, and a passion for troubleshooting. - Ability to work autonomously and within cross‑functional teams. **Key Responsibilities** - Deploy and integrate applications into production environments. - Participate in production releases, guaranteeing quality and uptime. - Monitor, analyze, and resolve production incidents (diagnosis, remediation, escalation). - Automate and optimize operational procedures. - Document technical and operational procedures. - Contribute to environment evolution projects and continuous improvement initiatives. **Required Skills** - Operating systems: Windows, Linux/Unix. - Scripting: Shell, PowerShell, Python. - Batch schedulers: Control‑M, $Universe, Autosys (or equivalents). - Monitoring and IT Operations tools. - Middleware familiarity: Apache, Tomcat, Weblogic, JBoss. - DevOps/CI‑CD tools: Jenkins, Git, Ansible, Docker, Kubernetes (knowledge appreciated). **Required Education & Certifications** - Bachelor’s degree in Computer Science, Information Technology, or related field (or equivalent practical experience). - Relevant certifications (e.g., Microsoft Certified: Azure Administrator, Red Hat Certified Engineer, or equivalent) are a plus.

Metz, France

Hybrid

31-10-2025

Company Name

OPEN

Job Title

Développeur JAVA/ ReactJs Fullstack senior H/F

Job Description

Job Title: Senior Java / ReactJS Fullstack Developer Role Summary: Design, develop, and maintain enterprise-grade applications for the banking/insurance sectors. Bridge user needs with technical solutions, focusing on decision-support tools, trading automation, and front‑office interfaces. Expectations: - 4‑8 years of professional experience in backend Java (Spring, JEE) and frontend ReactJS. - Proven ability to work in Agile Scrum environments. - Strong English communication skills. - Demonstrated focus on clean code, TDD/BDD, and continuous improvement. Key Responsibilities: - Gather and translate business requirements into detailed specifications. - Design and implement Java backend services and ReactJS front‑end components. - Develop trading automation tools and decision‑support dashboards for traders and sales. - Write technical documentation and maintain accurate release notes. - Execute unit, integration, and functional tests; support regression testing. - Perform corrective and evolutionary maintenance of deployed solutions. - Apply coding standards (Clean Code, Craftsmanship, TDD, BDD) consistently. - Participate in daily stand‑ups, sprint planning, reviews, and retrospectives. Required Skills: - Java (8/11/17) with Spring Boot, JPA/Hibernate, RESTful APIs. - ReactJS, Redux, TypeScript, and related front‑end technologies. - SQL/NoSQL databases (MySQL, PostgreSQL, MongoDB). - Unit testing frameworks (JUnit, Mockito, Jest, Enzyme). - CI/CD pipelines (Git, Jenkins, Docker). - Version control best practices (Git workflows). - Exposure to cloud platforms (AWS, Azure, GCP) and DevOps concepts. - Knowledge of finance/insurance domain concepts is an advantage. - Familiarity with Agile practices and tools (Jira, Confluence). Required Education & Certifications: - Bachelor’s or Master’s degree in Computer Science, Software Engineering, or related field. - Professional certifications such as Oracle Certified Professional Java SE, AWS Certified Developer, or Scrum Master (CSM/PSM) are highly desirable.

Île-de-france, France

Hybrid

Senior

03-11-2025

Company Name

OPEN

Job Title

Concepteur Développeur en Stage H/F

Job Description

Job title: Junior Web Developer Intern (Java/Spring & Vue.js) Role Summary: Internship focused on web application development for a public‑sector client, within an Agile SAFe framework. The role involves designing and coding Java/JEE components, contributing to front‑end features with Vue.js, and participating in end‑to‑end CI/CD pipelines. Expectations: - Duration: 4–6 months (February 2026 start). - Final‑year student (Bac+4/5) in engineering or Computer Science. - Demonstrated ability to learn quickly, work collaboratively, and adhere to Agile practices. Key Responsibilities: - Design and implement Java/JEE solutions under mentorship. - Develop and enhance Vue.js front‑end components. - Participate in Agile ceremonies: daily stand‑ups, sprint planning, reviews, retrospectives. - Ensure smooth integration and deployment via Jenkins, SonarQube, and CI/CD best practices. - Use IntelliJ IDEA, Git, and Jira for code management and issue tracking. - Contribute to technical documentation and code reviews. Required Skills: - Strong foundation in Java (11/17) and object‑oriented design. - Experience with Spring framework (Spring Boot, Spring MVC, JPA). - Familiarity with Vue.js (component architecture, Vuex, routing). - Knowledge of RESTful web services, JSON, and HTTP protocols. - Basic understanding of CI/CD concepts and tools (Jenkins, SonarQube). - Comfortable with Git version control. - Ability to write unit and integration tests (JUnit, Mockito). - Proficient in using IntelliJ IDEA and Jira. - Demonstrated interest in full‑stack development, Agile, and DevOps practices. Required Education & Certifications: - Currently enrolled in a 4th or 5th year engineering or Master’s program in Computer Science or related field (Bac+4/5). - No specific certifications required; subject‑matter knowledge is sufficient.

Nantes sud, France

On site

05-11-2025

Company Name

OPEN

Job Title

Concepteur Développeur .Net/React H/F

Job Description

**Job Title** Full‑Stack .NET/React Developer **Role Summary** Collaborate within an Agile Scrum squad to design, develop, and maintain a strategic technical foundation. Has responsibility for both backend (.NET Core/C#) and frontend (ReactJS/TypeScript) components, ensuring high‑quality code through automated testing, continuous integration, and code reviews. Engage in the full product lifecycle from feature conception to production deployment, leveraging DevOps practices on Microsoft Azure. **Expectations** - Proficiency in .NET Core and ReactJS development. - Strong DevOps mindset: CI/CD, automated testing, monitoring. - Ability to work collaboratively in a cross‑functional, fast‑moving squad. - Continuous improvement orientation and openness to new technologies. **Key Responsibilities** - Design, implement, and test backend services (.NET Core, C#, SQL Server). - Build and maintain responsive UI components (ReactJS, TypeScript, JavaScript). - Participate in sprint planning, backlog grooming, and daily stand‑ups. - Perform code reviews, write automated tests (unit, integration, BDD). - Integrate CI/CD pipelines (GitHub Actions or similar) and monitor deployments on Azure. - Configure and maintain ElasticSearch & Kibana dashboards for logging and monitoring. - Provide post‑deployment support and troubleshoot production issues. **Required Skills** - .NET Core, C#, ReactJS, TypeScript, JavaScript - Git/GitHub workflow, Agile Scrum, CI/CD, BDD - Microsoft Azure services, SQL Server, ElasticSearch, Kibana - Strong grasp of automated testing frameworks and code quality tools - Excellent communication, collaboration, problem‑solving, and adaptability **Required Education & Certifications** - Bachelor’s or Master’s degree in Computer Science, Software Engineering, or related field (or equivalent professional experience). - Relevant certifications are a plus: Microsoft Certified: Azure Developer Associate, Scrum Master/Product Owner, etc.

Nantes sud, France

Hybrid

06-11-2025