Senior Fullstack Developer

October 6, 2026

Hybrid

Senior

Paris

Indeed

Description

A French payment solution designed for merchants, e-merchants of all sizes and fintechs, with a team of 300 people serving 17,000 SMEs such as Hast and Plantes pour tous as well as large groups like Maisons du Monde, Veepee and Western Union. The squad is looking for a Senior Fullstack Developer to design, develop and document new features across the whole stack (Java backend, React frontend). The work takes place in a strongly security-challenged context (PCI-DSS certification) with very high service availability.

Responsibilities

Analyze, design, develop and document new features as a team per PM specs
Fullstack development and documentation across the whole stack: Java backend, React frontend
Contribute to the evolution of application architecture to support platform robustness
Investigate, prototype and challenge technical choices with the rest of the team
Participate in continuous improvement: tooling, automation, tech watch, technical debt reduction
Guarantee code quality: clean code, tests, security, code reviews, bug fixes
Actively participate in Agile rituals: refinement, planning, daily, review, retro
Document developments and spread expertise internally

Requirements

At least 5 years of fullstack expertise, mastering at least Java and React/TS
Curiosity to appropriate the third stack technology, Python
Ownership of code quality, maintainability and testability of delivered code
Pragmatic arbitration between technical debt and product imperatives
Growth mindset with clear communication, both oral and written
Experience with distributed architectures, mature CI/CD or data migration challenges is strongly valued

Conditions

Hybrid work organization plus 350 EUR contribution for remote equipment
25 paid leave days per year and 10 RTT days per year
Meal card worth 10 EUR per day, 56% covered by the company
Health insurance Alan covered at 60% by the company
Second parent leave provided by the company
50% of public transport or Velib subscriptions covered by the company
Offices in the 13th arrondissement of Paris near Bibliotheque Francois Mitterrand
Mental health support via Qualicare and sports and wellbeing activities via Windoo
2 days per year offered for teambuilding volunteering in associations

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