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Bsport Logo Bsport · IT - Software Development

Senior Fullstack Engineer - Freelance

France, Paris · Job Posted February 19, 2026
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Job Description

bsport is an all-in-one platform combining boutique fitness and advanced technology. Our platform helps our partners manage their bookings, payroll, marketing and more, to streamline operations and boost their commercial success. Our focus for the coming years is building reliable and scalable systems, and setting a new standard for technical excellence.

Job Responsibility

  • Take ownership of major frontend initiatives, help lead complex technical projects, and work directly with leadership to define the future of our platform
  • Help us address technical debt, a complete revamp of our client interfaces, build and maintain our in-house design systems, and build scalable solutions for one of our product verticals
  • Own the revamp of key back-office pages and features within the Booking scope (list and detail views, member profiles, establishment pages, teacher tools…)
  • Implement interfaces from high-fidelity prototypes delivered by our dedicated designer
  • Write clean, tested React (TypeScript) code aligned with our internal design system
  • Collaborate with internal engineers to ensure long-term maintainability
  • Evolve and adapt the backend logic that powers the revamped front-end features (APIs, data models, business rules)
  • Ensure the back-office pages you're rebuilding are fully supported end-to-end — not just visually, but functionally
  • Work closely with internal backend engineers to align on contracts, flag dependencies early, and unblock front-end delivery

Requirements

  • 5+ years of full-stack experience, with genuine front-end depth in React (TypeScript)
  • Solid backend skills in Python (Django or FastAPI), comfortable with high-volume systems
  • At ease in a hybrid role — able to deliver polished UI and review a backend PR in the same day
  • Informal technical leadership: you share feedback in code reviews, document decisions, and help others grow
  • Strong written communication skills in English
  • Background in a startup or scale-up, ideally B2B SaaS

What we offer

  • A varied mission with direct product impact in the short and medium term
  • A modern stack
  • A high-growth context with an engaged team and strong engineering standards
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