Front-end Engineer

Modjo

. Develop modern, high-performance, intuitive user interfaces for the web application, mobile app, and Chrome extension .

Posted 9/18/2026full-timeParis • FranceJuniorMid-LevelWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing high-performance user interfaces using TypeScript and modern frontend frameworks, with a strong focus on usability, accessibility, and web performance. Capable of collaborating effectively with cross-functional teams to deliver robust, well-documented solutions while maintaining code quality and contributing to continuous improvement.

Highest-signal resume keywords

TypeScript ProficiencyReact Framework ExperienceResponsive Interface DevelopmentFrontend Testing ToolsAPI Integration Collaboration

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Web DevelopmentFrontend ArchitectureDesign System PrinciplesState ManagementWeb Performance Best PracticesMobile Application DevelopmentChrome Extension DevelopmentUsability TestingCode DocumentationMicro-Interaction Design

Soft Skills

Attention to DetailOwnership and AutonomyCollaborationProblem-SolvingKnowledge Sharing

Tools & Technologies

React NativeObservability ToolsMonitoring ToolsTesting FrameworksDevelopment Practices

Industry Keywords

User Experience DesignApplication SecurityProduction StabilityContinuous ImprovementTechnical Documentation

Tech Stack

Tools & technologies

ReactReact NativeTypeScript

About the role

Key responsibilities & impact

Develop modern, high-performance, intuitive user interfaces for the web application, mobile app, and Chrome extension
Design seamless, consistent experiences centered around user needs
Turn designs and specifications into robust, maintainable features
Pay close attention to usability, accessibility, and visual consistency
Refine interactions and micro-interactions and ensure high-quality execution across user journeys
Optimize applications to ensure fast load times and excellent responsiveness across all devices and browsers
Contribute to the stability and availability of applications in production
Ensure the security, integrity, and reliability of systems
Maintain code quality through testing, monitoring, and clear documentation
Contribute to the continuous improvement of the technical stack and development practices
Participate in architectural decisions and challenge product specifications
Collaborate with Backend Developers to ensure seamless API integration
Collaborate with Product and Design teams to build high-impact features for users

Requirements

What you’ll need

2 to 5 years of experience in web development
Excellent command of TypeScript and modern frontend frameworks (React, React Native, or equivalent)
Experience developing responsive interfaces, mobile applications, and/or Chrome extensions
Strong understanding of design system principles, state management, frontend architecture, and web performance best practices
Proficiency with frontend testing, observability, and monitoring tools
Ability to deliver robust, tested, and well-documented solutions
Ability to articulate technical choices, challenge specifications, and document decisions
Ownership and autonomy: take responsibility for projects from start to finish and raise blockers early with proposed solutions
Thoroughness and strong attention to detail
Contribute to the team's growth and share knowledge and learnings

Benefits

Comp & perks

2 remote-working days per week and up to 9–11 additional paid days off (RTT) per year
Meal vouchers provided through a Swile card
Transportation covered (Navigo Pass) or a sustainable mobility allowance of up to €42/month
Gym membership through Gymlib
Alan Blue health insurance
Access to Pluxee, the employee benefits platform provided by the works council (CSE)
Structured onboarding and supported professional development from day one
Regular performance reviews to support your growth
Parental Leave Soft Landing: upon returning from maternity or paternity leave, one day off per week during the first four weeks, at full pay