Company Description
Location Colombelles
Contract Permanent position
Start July 2025
Flexcity is one of Europe’s leading energy tech companies and part of the Veolia Group. Operating in France, Belgium, Spain, Italy, UK and the Netherlands, we aggregate and optimize thousands of flexible energy assets (batteries, industrial processes, renewables...) to support grid stability and drive the energy transition.
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.
Job Description
As Lead Infrastructure Engineer, you’ll play a central role in shaping and maintaining our infrastructure landscape. You’ll ensure our systems are secure, reliable, and ready to scale — enabling real-time control of hundreds of MWs across multiple markets.
Reporting directly to the CTO and working within a collaborative, multi-country team, you’ll split your time across infrastructure architecture, team leadership, and DevOps enablement.
Infrastructure 60%
Conceive, build, and maintain our hybrid infrastructure — currently based on AWS (ECS, EC2, RDS) with on-premise components, but with a planned migration to GCP in 2026.
Guarantee availability, resilience, and security across our systems.
Drive modernization: infrastructure-as-a-service, observability, automated failover, and scalability.
Team Leadership – 30%
Lead and coach a team of two infrastructure engineers.
Set clear goals, foster individual growth, and cultivate a positive team culture.
Act as a bridge between infrastructure and the broader Tech organization.
DevOps best practices 10%
Promote and embed DevOps practices (CI/CD, automated testing, monitoring).
Collaborate closely with backend developers to streamline delivery pipelines.
Drive the adoption of infrastructure that enables faster, safer, and more reliable releases.
Qualifications
Key Qualifications
Hard Skills
Must-Have
Proficient in cloud architecture (GCP preferred), networking, and system security.
Strong Linux background, CI/CD tooling, containerization.
Fluent in French (spoken and written), professional level in English
Nice-to-Have
Knowledge of Pulumi, Kubernetes.
Backend experience (Java/Kotlin a plus).
Soft Skills
Proactitivity: Ability to improve our tech stacks.
Improvement mentality: Passionate about continuous improvement and innovation.
Team work spirit: Capability to collaborate with other teams
Additional Information
Why Join Flexcity?
Impact Be part of our key Belgian commercial team, with a direct impact in the decarbonisation of our industry
Purpose Contribute concretely to a greener future, both in France, and globally
Scale-up Work in an agile environment, getting structured and more efficient, but still with a large freedom and strategic decision making available at all levels of the company
Group Benefit from a close relationship with the Veolia group, a global leader in the ecological and energy transformation
Innovation Engage with cutting-edge energy technology and markets
Supported Get backing from dedicated central support teams in R&D, Product and Portfolio, in order to get you the best tools, training and sounding board to work in the best environment
Community Engage with a team spread across multiple countries, learning and innovating together. Connect with diverse teams across Europe through regular team-building events, both within Flexcity and Veolia
Training Develop your hard and soft skills with dedicated training made available, as well as strong learning curve within your position
Hybrid Experience international collaboration and flexible work schedules, including 2 work-from- home days
About Flexcity
Flexcity is a uniquely positioned energy technology company in the Internet of Energy sector. It is a leading demand response aggregator in Europe, rapidly growing and expanding to new regions. Flexcity’s core activity consists of supporting the power grid balance through the operation of its large portfolio of flexible fully-automated assets.
The Flexcity portfolio consists of a wide range of technologies such as batteries, eBoilers, CHPs, generators, wind farms, solar parks and large industrial processes.
As a provider of smart energy management services based on innovative smart grid technology, Flexcity applications focus on demand-side optimization and management (Demand Response, Load Shifting, etc.). Flexcity supports many industrial companies in reducing their overall electricity costs by providing demand-side management services based on innovative optimization and modelling software applications.
Flexcity is truly at the cutting edge of energy innovation. As a member of the team, you will contribute to a sustainable low-carbon energy sector.
As an inclusive company, Veolia is committed to diversity and gives equal consideration to all applications, without discrimination.
