Assystem is an international company with one mission: accelerate the energy transition around the world.

Every day, our 6,500 switchers located in 12 countries (Europe, Middle East, Pacific Asia & Africa) connect their six thousand billion neurons to tackle the task of the century: switching to low-carbon energy.

We are a collective committed to the actors who are making the energy switch. Sharing our knowledge, expertise and values allows us to innovate and think differently about the energy transition.

Drawing on more than 55 years’ experience in highly regulated sectors subject to strict security and safety requirements, we provide our customers with engineering and project management services, as well as digital services and solutions to optimize the performance of complex infrastructure projects throughout their life cycle. The Group is currently ranked second in the world for nuclear engineering.

To ensure a viable, efficient, and reliable energy future for all

Job Description

Key Responsibilities:

• Design, develop, and implement system integrations (APIs, middleware, data interfaces)
• Analyze business and technical requirements to define integration solutions
• Configure and manage integration platforms and tools
• Monitor and troubleshoot integration performance issues
• Ensure data accuracy, security, and compliance with organizational standards
• Collaborate with IT, digital, and business teams to support system enhancements
• Maintain technical documentation for integrations and workflows
• Support testing, deployment, and post-implementation activities

My profile

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or related field
• Proven experience in system integration, APIs, or middleware platforms
• Strong understanding of data formats (JSON, XML), web services, REST/SOAP
• Experience with integration tools (e.g., MuleSoft, SAP PI/PO, Oracle Integration, etc.)
• Knowledge of databases and SQL
• Strong analytical and problem-solving skills
• Good communication skills in English