Experienced React Native/NestJS Developer
Joining Nirio Payment Services, a subsidiary of the FDJ UNITED group, means participating in a simple mission: making everyday financial services accessible to everyone - bill payments, current operations, and account solutions with IBAN - through a local network. As part of our development and the internalization of our technical skills, we are looking for a Fullstack Developer to strengthen our team. You will work on the evolution of a platform integrated into a complex financial ecosystem. You will be part of a multidisciplinary squad composed of a tech lead and developers, a PM/PO, and will work in close collaboration with transversal QA and Product Design teams.
- Design and development of end-to-end features: You will optimize both the backend (NestJS, Postgres) and the frontend (React Native).
- You will participate in the integration of internal and external partner APIs and SDKs.
- You will ensure the maintenance and improvement of the platform's performance, stability, and security.
- Contribution to technical choices and best practices: You will participate in discussions on architecture and technical solutions.
- You will apply and promote good development practices: unit tests, integration tests, code reviews, and documentation.
- You will collaborate with QA and Product Designers to ensure robust deliverables that meet quality standards.
- Close collaboration with transversal teams: You will work with the PM/PO to understand user needs and propose suitable solutions.
- You will actively participate in agile ceremonies: stand-ups, sprint planning, retrospectives.
- You will ensure fluid communication with squad members and Tech Leads.
- You will propose any improvements or evolutions you deem useful.
- You have a strong command of JavaScript (TypeScript), NestJS, GraphQL for the backend, and React Native (Mandatory) for the frontend.
- You have good skills in relational databases (Postgres, Prisma).
- You are familiar with cloud environments (GCP) and CI/CD tools (GitLab) and are sensitive to good development practices: automated testing (Jest, Appium, Browserstack), security, documentation.
- You have at least 5 years of experience in fullstack development, ideally in complex environments.
- You enjoy teamwork and a product-oriented approach, and you are comfortable in an agile and multidisciplinary setting.
- Experience in the banking ecosystem or around Core Banking or Banking as a Service solutions is a plus.
- 13th month salary, individual bonuses, group savings plan, parental policy, health insurance, 100 days of remote work per year, meal vouchers...
- Benefit from training and support that ensure your employability.
FDJ United is one of Europe's largest gaming and betting groups, formed after French lottery operator La Française des Jeux (FDJ) acquired Kindred Group - the company behind Unibet - in 2024 and rebranded the enlarged group in 2025. Headquartered in Boulogne-Billancourt, France, it operates lottery, online sports betting, casino and poker across multiple European markets and Australia. Its portfolio includes well-known online brands such as Unibet, 32Red and Maria Casino, alongside FDJ's French lottery and retail network. The group is listed on the Euronext Paris exchange.