Senior Frontend Developer

Veolia Environnement SA; Colombelles; Sur place; EUR 45 000 - 65 000; Plein temps

Résumé du poste

A leading energy technology company is seeking a Senior Frontend Developer in Normandie, France. You will lead feature development, ensure code quality, and mentor junior developers, significantly impacting the UI team and the overall tech strategy. Ideal candidates are fluent in English and French, with strong skills in React and front-end development. This role offers a full-time position with opportunities for international collaboration and training.

Prestations

Impact on decarbonisation

Training opportunities

Flexible work schedules

Responsabilités

• Implement complex UI features in React/TypeScript
• Collaborate with product teams
• Conduct in-depth code reviews
• Design scalable UI architecture
• Lead structural refactors

Connaissances

Fluent in English and French

Strong front-end development expertise

Testing proficiency

Architecture principles

Component libraries & design systems

Tooling & DX expertise

Strong communication skills

Leadership skills

Mentoring and knowledge sharing

Problem-solving mindset

Stakeholder management

Meticulous attention to detail

Product-oriented thinking

Outils

React

Node.js

Angular

APIs

REST

Spring

SOAP

.NET

JavaScript

J2EE

Java

Web Services

Description du poste

Role

As a Senior Frontend Developer you will play a pivotal role in crafting and elevating our user interfaces and web applications. You’ll drive feature development while ensuring code excellence through thorough reviews and mentoring junior developers. Working closely with cross‑functional teams you’ll contribute to our technical strategy and deliver robust scalable frontend solutions that empower our platform to manage real‑time energy flexibility across Europe.

You will be part of our tech team under the UI Team Manager and your role is divided in:

Feature development & delivery - 60%

• Implement complex UI features in React/TypeScript
• Collaborate with product teams
• Own user‑facing experiences from idea to release
• Evaluate technical feasibility
• Align with backend teams

Quality reviews & mentorship - 30%

• Conduct in-depth code reviews
• Ensure architectural consistency
• Uphold best practices in performance, accessibility and typing
• Pair programming and guiding mid/junior engineers
• Onboarding new developers
• Write or maintain internal documentation and ADRs

Tech strategy & cross‑functional collaboration - 10%

• Design scalable UI architecture
• Enforce frontend patterns
• Lead structural refactors
• Improve build tools, linting and CI pipelines
• Contribute to roadmap decisions
• Contribute to component documentation / mockups (Figma Storybook)

Qualifications

Hard Skills – Must Have

• Fluent in English and French
• Strong front‑end development expertise
• Testing proficiency
• Architecture principles
• Component libraries & design systems
• Tooling & DX expertise

Hard Skills – Nice to have

• UX sensibility
• DDD / Hexagonal Architecture
• Observability

Soft Skills

• Strong communication skills
• Leadership skills
• Mentoring and knowledge sharing
• Problem‑solving mindset
• Stakeholder management
• Meticulous attention to detail
• Product‑oriented thinking

Why Join Flexcity

• Impact: Be part of our key Technology 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 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 optimisation 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.

Remote Work

No

Employment Type

Full‑time

Key Skills

APIs, REST, Spring, SOAP, .NET, React, Node.js, Angular, J2EE, JavaScript, Web Services, Java

Experience

years

Vacancy

1