Front-End Software Engineer

Kolecto

. Design, develop, and maintain responsive, accessible user interfaces using React, TypeScript, HTML5, and CSS3 .

Posted 10/9/2026full-timeParis • FranceMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in frontend development with a strong focus on React, TypeScript, and performance optimization. Capable of mentoring junior developers while ensuring adherence to best practices in design, testing, and documentation.

Highest-signal resume keywords

React DevelopmentTypeScriptFrontend Performance OptimizationUnit TestingGit and CI/CD

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Frontend DevelopmentReactTypeScriptHTML5CSS3Vue.jsAngularNext.jsTailwindZod

Soft Skills

Technical MentorshipCollaboration

Tools & Technologies

WebpackVite

Certifications & Qualifications

Criminal Record ExtractValid Residence Permit

Industry Keywords

Web Accessibility PrinciplesDevelopment Best PracticesDesign PatternsTestingDocumentation

Tech Stack

Tools & technologies

AngularJavaScriptNext.jsReactReact NativeTypeScriptVue.jsWebpack

About the role

Key responsibilities & impact

Design, develop, and maintain responsive, accessible user interfaces using React, TypeScript, HTML5, and CSS3
Work closely with backend, product, and mobile teams
Ensure seamless and consistent integration between different components
Optimize application performance, particularly rendering, state management, and API calls
Stay up to date with the latest technology trends
Propose continuous improvements and adopt industry best practices and tools
Provide technical mentorship and support to junior developers
Participate in a technical assessment, role-specific interviews, and an informal office meeting as part of the recruitment process

Requirements

What you’ll need

Significant experience, typically 4 to 7 years, in frontend development
Strong command of development best practices, including design patterns, testing, and documentation
Strong skills in React, Vue.js, or Angular
Knowledge of Next.js or React Native
TypeScript is required
Experience with Tailwind, Next.js, and Zod is a plus
Comfortable with unit testing, integration testing, and thorough code reviews
Understanding of web accessibility principles and frontend performance optimization techniques
Experience with Git and CI/CD
Experience with bundling tools such as Webpack or Vite
Successful candidates will be required to provide a criminal record extract (Bulletin No. 3)
Where applicable, successful candidates will be required to provide a valid residence permit
Professional integrity and background check for successful candidates

Benefits

Comp & perks

Alan Blue health insurance (intermediate coverage), 70% covered by Kolecto for you and your dependents (spouse/partner and children)
Swile meal vouchers worth €11.52 per day, 60% covered by Kolecto
Flexible remote work, up to 3 days per week from within France
€150 annual allowance to equip and set up your home workspace
Unlimited organic coffee and fresh fruit delivered weekly by local producers
Support before and after parental leave
Annual family-focused event
Two company seminars per year
Inspiring talks and after-work social events