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3E

Frontend Developer, React

3E

React Frontend Developer responsible for developing and maintaining web applications for a renewable energy technology company. Collaborating with cross-functional teams to ensure high-quality feature delivery.

Posted 7/13/2026full-timeBrussels • 🇧🇪 BelgiumMid-LevelSeniorWebsite

Core Competencies

Role fit
Core Competencies

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Proficient in developing and maintaining high-quality React and TypeScript applications, with a strong focus on performance optimization, user-friendly interface design, and collaboration in multidisciplinary teams. Experienced in implementing secure front-end patterns and contributing to architectural decisions for scalable solutions.

Highest-signal resume keywords
React DevelopmentTypeScript ProficiencyPerformance OptimisationUI/UX PrinciplesMaterial UI Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
ReactTypeScriptPerformance OptimisationDebuggingUI/UX DesignRefactoringData VisualisationState ManagementEnd-to-End TestingCode Review
Soft Skills
CollaborationCommunicationProblem-Solving
Tools & Technologies
Material UIRedux ToolkitPlaywrightReact Testing LibraryHighchartsNxViteESLintPrettierGit
Certifications & Qualifications
University Degree in Computer Science
Industry Keywords
Renewable EnergyFront-End DevelopmentDigital Solutions

Tech Stack

Tools & technologies
AzureDockerMaterial UIReactReduxTypeScript

About the role

Key responsibilities & impact
  • Develop, maintain, and evolve high-quality React/TypeScript applications, translating product and design requirements into robust, scalable, and maintainable features.
  • Build and improve core product functionality in collaboration with product managers, designers, and backend engineers, ensuring a seamless and consistent user experience.
  • Design and implement performant, data-heavy interfaces (e.g. dashboards, tables, and charts) capable of handling large and complex datasets efficiently.
  • Identify, analyse, and resolve performance bottlenecks across the front-end using modern React optimisation techniques and best practices.
  • Create and maintain reusable UI components within a shared design system (Material UI-based), ensuring consistency, accessibility, and scalability.
  • Contribute to architectural decisions and continuously improve the structure, readability, and maintainability of the codebase.
  • Participate in code reviews, promoting high engineering standards, clean code practices, and knowledge sharing within the team.
  • Implement secure and reliable front-end patterns, including user authentication and role-based access flows where applicable.
  • Collaborate in a multidisciplinary environment with developers, domain experts, and stakeholders to deliver impactful digital solutions in the renewable energy space.

Requirements

What you’ll need
  • You hold a University degree in Computer Science (or equivalent) and have 4+ years of Front-End experience (React focus).
  • You are proficient in English (spoken and written).
  • You are strong in React and TypeScript development.
  • You are experienced in performance optimisation and debugging, and you know how to identify and resolve issues efficiently.
  • You have experience working with existing codebases, including refactoring, improving structure, and building new features on top of legacy decisions.
  • You understand UI/UX principles and build user-friendly interfaces.
  • Bonus points for:
  • Other languages: you will have international colleagues speaking French, Dutch and other languages
  • Experience with: Material UI (MUI) or similar component libraries/Redux Toolkit (RTK) for state management/frontend architecture patterns/Playwright for end-to-end testing and react testing library/Highcharts or similar data visualisation libraries/Nx and/or Vite as build frameworks (and monorepo setup)/linting and formatting tools (e.g. ESLint, Prettier)/Git, Docker and Azure DevOps pipelines.

Benefits

Comp & perks
  • Training on the job by our experts so you get to know our solution and work in and out
  • Flexibility in our open-minded company.
  • An international environment: projects in over 100 countries worldwide, colleagues of over 20 nationalities.
  • Home working (2 days per week)
  • Hospitalisation insurance
  • pension saving
  • €9 meal voucher/day
  • flexible income plan
  • 20 legal days off + 12 compensation days (per full year worked)
  • sustainable transport subscription or bike allowance (€0.36/km).