Senior Front-end Software Engineer

Kolecto

full-time

Posted on: 4/20/2026

Location Type: Hybrid

Location: Paris • France

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About the role

Frontend application development: Design, develop, and maintain responsive, accessible user interfaces using modern technologies such as React, TypeScript, HTML5, and CSS3.
Cross-team collaboration: Work closely with backend, product, and mobile teams to ensure smooth and consistent integration across components.
Performance optimization: Improve application performance by optimizing rendering, state management, and API calls.
Technology watch: Keep up with industry trends and propose continuous improvements to adopt best practices and tools.
Technical mentoring: Provide technical guidance and mentorship to junior developers, steering them on quality standards and frontend development best practices.

Significant experience (typically 5 to 7 years) in frontend development with a strong command of development best practices (design patterns, testing, documentation) and modern frontend technologies.
Proficiency with modern frameworks: Strong skills in React, Vue.js, or Angular, along with familiarity with Next.js or React Native. TypeScript is a must; Tailwind, Next, and Zod are advantages.
Comfortable with unit and integration testing and thorough code reviews to ensure code quality.
Understanding of web accessibility principles and frontend performance optimization techniques.
Experience with Git, CI/CD, and bundlers like Webpack or Vite.

Benefits

Up to 3 days of remote work
Annual RTT policy (approx. 10 days/year)
Digital meal vouchers valued at €11.52 gross per working day, 60% covered by Kolecto
Alan Blue health insurance covered 70% by Kolecto

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

ReactTypeScriptHTML5CSS3Vue.jsAngularNext.jsReact NativeTailwindZod

Soft Skills

cross-team collaborationtechnical mentoringcommunicationguidancequality standards