REACTIS

About the Company

Nous sommes une ESN qui accompagne les entreprises dans leurs projets IT grâce à des modes d'intervention flexibles : Assistance Technique Unitaire (ATU), Assistance Technique Groupée (ATG), ou mode projet agile, pour répondre efficacement à chaque besoin technologique. Nos domaines d’intervention couvrent le développement logiciel, l’intégration de solutions IT, la gestion de projets digitaux et l’assistance technique personnalisée. Avec une approche basée sur la proximité et l’engagement, nous travaillons main dans la main avec nos clients pour simplifier leurs défis technologiques et assurer leur succès. Nos expertises : Gestion de projets IT | Maintenance des systèmes | Transformation digitale | Services d'Applications | Conseil Quelque soit votre besoin, nous pouvons y répondre en interne grâce à nos centres de services présents à #aix, #massy et #lyon, qui couvrent de multiples technos : PHP, .Net, Power Builder, Angular, WinDev, Java, etc. Rejoignez-nous pour façonner ensemble le futur du numérique, avec des solutions à la fois innovantes et accessibles.

Listed Jobs

Company Name

REACTIS

Job Title

Data Engineer F/H

Job Description

**Job Title** Data Engineer **Role Summary** Build, deploy, and maintain scalable data pipelines within a Bronze‑Silver‑Gold Data Lake/MDM architecture. Ensure reliable ingestion, data quality, performance optimization, security, and compliance across multiple data sources. **Expectations** - Minimum 3 years of data engineering experience (BI, Data Lake, data flows). - Proven ability to work in complex, multi‑source environments, preferably finance or insurance. **Key Responsibilities** - Design and develop robust, scalable data pipelines. - Implement and maintain ingestion and orchestration workflows using Apache NiFi. - Ingest data from diverse sources: REST APIs, XML/CSV files, JSON. - Model data and transform for MDM consumption. - Set up data quality controls, traceability, and audit processes. - Optimize pipeline performance and recommend continuous improvements. - Ensure data security, compliance, and proper access controls. - Document processes, schemas, and technical best practices. **Required Skills** - Apache NiFi (ingestion, orchestration, monitoring). - SQL and relational modeling (PostgreSQL). - Object storage familiarity: Amazon S3, Azure Blob. - Data formats/protocols: JSON, XML, CSV, REST API. - Scripting: Python, Bash. - Version control and CI/CD: GitLab, GitLab CI. **Required Education & Certifications** - Bachelor’s degree in Computer Science, Information Systems, or related field. - Relevant certifications (e.g., AWS Certified Data Analytics, Azure Data Engineer Associate) are a plus.

Paris, France

Hybrid

Junior

08-01-2026

Company Name

REACTIS

Job Title

Analyste Développeur Cobol F/H

Job Description

**Job Title:** Cobol Analyst–Developer (M/F) **Role Summary:** Maintain and evolve a strategic mainframe information system by translating business needs into technical solutions, coding, testing, documenting, and ensuring quality on existing COBOL applications. **Expactations:** - Deliver reliable COBOL code within defined schedules. - Collaborate closely with business and technical teams in a structured (V‑model or iterative) environment. - Participate actively in technical committees and functional workshops. **Key Responsibilities:** 1. Analyze business requirements and derive technical specifications. 2. Design, develop, and test COBOL components in a mainframe (z/OS, CICS, IMS, DB2) environment. 3. Perform corrective and evolutionary maintenance of existing applications. 4. Maintain code quality standards and produce comprehensive documentation. 5. Contribute to technical meetings and functional workshops. **Required Skills:** - Advanced COBOL programming on mainframe platforms. - Functional and technical analysis proficiency. - Experience with structured development life cycles (V‑model, iterative). - Attention to detail, autonomous work ethic, and strong teamwork. - Effective communication skills in English and French. **Required Education & Certifications:** - Bachelor’s degree in Computer Science, Information Technology, or a related field. - Relevant mainframe or COBOL certification (e.g., IBM Certified Application Developer – COBOL).

Paris, France

Hybrid

08-01-2026

Company Name

REACTIS

Job Title

Développeur Java J2EE F/H

Job Description

Job Title: Java J2EE Developer Role Summary: Develop and enhance backend and frontend features for a strategic application, collaborating with technical leads and contributing to continuous process improvements. Expectations: Strong Java J2EE expertise with Spring/Hibernate, Angular proficiency, and experience in building and maintaining SOAP/REST services. Requires analytical rigor, functional business understanding, and teamwork orientation. Key Responsibilities: - Design technical solutions aligned with Tech Lead guidance. - Develop Java backend (Spring/Spring Boot, Hibernate) and frontend (Angular) functionality. - Build and maintain SOAP/REST web services. - Implement and maintain high-volume Spring Batch processes. - Write unit/integration tests (JUnit, Mockito, DBUnit). - Conduct code reviews and optimize code quality using SonarQube/CAST. - Improve development practices and collaborative workflows. Required Skills: Java 8/17/21 experience, Spring 3/Spring Boot, Hibernate, Angular 17-19, PostgreSQL, SQL, Spring Batch, SOAP/REST, JUnit, Mockito, DBUnit, SonarQube/CAST. Required Education & Certifications: NA.

Paris, France

Hybrid

08-01-2026

Company Name

REACTIS

Job Title

Chargé·e de Support Applicatif N1/N2 F/H

Job Description

**Job Title** Application Support Officer – Level 1/2 (M/F) **Role Summary** Provide first‑ and second‑tier support for enterprise applications, primarily using PL/SQL. Handle user tickets, troubleshoot incidents, configure application settings, and maintain documentation to ensure reliable operation of critical business systems. **Expectations** - Exceptional service orientation, clear communication, and pedagogical approach when interacting with users and laboratory teams. - Independence, meticulousness, and strong teamwork. - Ability to handle multiple requests concurrently and prioritize effectively. **Key Responsibilities** - Receive, triage, and resolve user and client tickets. - Perform Level 1 support: call handling, ticket management (follow‑ups, alerts), support email processing, user‑right administration, mass data processing. - Execute application‑level configuration and data modification tasks. - Address technical and functional user inquiries and laboratory questions. - Investigate and resolve application incidents, diagnosing root causes. - Recommend and implement solutions for recurring issues. - Maintain close liaison with end‑users and laboratories through analysis, follow‑up, coaching, and training sessions. - Escalate major incidents, communicate downtime, and coordinate remediation. - Author and update knowledge‑base articles documenting solutions and procedures. **Required Skills** - Proficiency in PL/SQL (including query writing and routine editing). - Familiarity with ITIL incident and change management processes. - Experience with business‑process applications (knowledge of a Warehouse Management System is advantageous). - Strong analytical, troubleshooting, and problem‑solving capabilities. - Excellent written and verbal communication skills. - Ability to document procedures and maintain knowledge repositories. **Required Education & Certifications** - Degree in Computer Science or related IT field (equivalent to Bac +2 to Bac +5). - Minimum of one successful year in application support (Level 1/2), TMA, or application maintenance. - ITIL certification is desirable but not mandatory.

Marseille, France

Hybrid

13-01-2026