Onlano
Frontend DevelopmentOnsite

Front-end Developer

Unseenlabs - Startup

Cesson-Sévigné, Rennes, 🇫🇷 FranceFull-time - Mid level (2-4 years)0 applicantsCloses Jun 17, 2026

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Job description

Job details

  • Location: Cesson-Sévigné, Rennes
  • Work mode: Onsite
  • Employment type: Full-time (Not an internship)
  • Salary: Salary details are available in the employer description.

Role overview

Unseenlabs, a Rennes-based space tech startup, seeks a Front-end Developer to build intuitive interfaces for satellite maritime surveillance systems. You'll work on cutting-edge solutions that detect and analyze ship activity using radiofrequency data from a 20-satellite constellation.

Job details

Based in Cesson-Sévigné, this Full-time Onsite role requires 2-4 years of experience. Salary details are available in the employer description.

Responsibilities

  • Develop responsive UI components for satellite data visualization platforms
  • Collaborate with UX/UI designers to implement intuitive user experiences
  • Optimize front-end performance for large-scale maritime monitoring systems
  • Ensure cross-browser compatibility across web and mobile interfaces
  • Write maintainable, testable code following Agile methodologies

Requirements

  • 2-4 years of front-end development experience
  • Proficiency in JavaScript/TypeScript and modern frameworks (React/Vue.js)
  • Strong HTML/CSS expertise with responsive design principles
  • Experience with version control systems (Git)
  • Understanding of REST API integrations

Benefits

  • Competitive salary package
  • Dynamic startup environment with cutting-edge space technology
  • Professional development budget
  • Flexible work hours
  • Team-building events

Keywords

ReactJavaScriptTypeScriptHTML/CSSVue.jsWebpackAgileUX/UIREST APIsCross-browser compatibility