Back-End Engineer H/F Flexcity

Hard Skills

- Fluent in French, Professional English
- More than 3 years of experience in development
- Proficient in backend development: Expertise in building robust and scalable back-end solutions.
- Software architecture: Understanding of scalable, maintainable architecture principles.
- Domain-driven design (DDD) & hexagonal architecture: Familiarity with advanced architectural patterns to design modular and decoupled systems.

Soft Skills

- Strong communication skills: Effectively convey complex technical concepts to both technical and non-technical stakeholders, fostering collaboration and understanding across teams.
- Mentoring and coaching: Guide and support junior engineers, sharing knowledge and best practices to help them grow and succeed within the team.
- A positive, pragmatic and professional attitude
- Comfortable in a fast changing work environment, you can easily adapt

Are you passionate about energy, sustainability, and technology, with a drive to create impactful backend solutions?

Flexcity, a leading European energy tech company within the Veolia Group is looking for a resourceful Senior Backend Developer to join our Technology department.

At Flexcity, Tech is not a support function - it is a key business driver. We operate in a complex, real-time, and highly regulated environment, requiring robust, secure, and adaptable systems to manage the increasing volatility of energy markets.

We structure our Tech organization into Feature Teams focused on delivering product value, and Platform Teams that provide the internal services and tooling enabling them to move faster and more reliably.

Our Market, Strategy, Connect, and BI Feature Teams work end-to-end on user-facing capabilities with a high level of ownership and autonomy.

Our Infrastructure, Security, IT, and Data Platform Teams build and maintain the core services, tooling, and foundations that empower the entire organization.

Teams are small, autonomous and operate with a strong sense of ownership. Guilds complement this setup by creating spaces for engineers to share expertise, align on standards, and contribute to our long-term technical vision across the company.

Benefits

We believe great engineering comes from continuous learning, curiosity and craftsmanship. To support this, we offer:

- One tech conference per year, fully covered
- Medium subscription to support continuous learning
- Access to technical books and resources
- O'Reilly Online Learning membership
- 5% of your time dedicated to exploring new technologies and improving your craft

As an inclusive company, Veolia is committed to diversity and gives equal consideration to all applications, without discrimination.