Freelancer profile translated to English.
Back to original languageAbout Joséphin Sylvère
Backend Developer | NestJS | Node.js
A poorly structured backend slows everything down, making new features difficult to add, bugs accumulate, and scalability becomes a problem.
I step in to design and develop clean, scalable backends with NestJS and Node.js, with a particular focus on architecture, API reliability, and code quality.
What I build:
→ Scalable REST APIs with NestJS and PostgreSQL
→ Microservices architecture with RabbitMQ
→ Real-time systems with WebSockets
→ Asynchronous processing with BullMQ
→ JWT authentication with role management
→ Dockerized deployments ready for production
Recent projects:
→ RideSync: Real-time microservices dispatch system
with Redis Geosearch and RabbitMQ
→ Toolsmith: Multi-tenant SaaS with Clean Architecture and RBAC
→ MailPulse: Transactional email service
with automatic retry
Stack: NestJS · Node.js · TypeScript · PostgreSQL ·
Redis · RabbitMQ · Docker · TypeORM
Looking for a NestJS backend developer to structure or start your project?
Contact me
French
Fluent
English
Conversational
Malagasy
Native or bilingual
Remote only
Primarily works remotely
Experience
- Innov-TBackend DeveloperTECHAugust 2025 - November 2025 (3 months)Fianarantsoa, MadagascarParticipated in the development of a full-stack tourist platformwith NestJS and React.→ Development of the circuit booking system —allowing clients to view and booktravel experiences→ Design and development of the admin backoffice formanaging circuits, bookings, and content→ Development of backend features for the publicwebsite (APIs, endpoints, business logic)→ Implementation of the client account management system —JWT authentication and profile management→ Participation in the project's technical documentation
- ITTFrontend DeveloperTECHJune 2025 - July 2025 (1 month)Fianarantsoa, MadagascarDevelopment of modern web interfaces with React.jsfor a school management application.→ Development of modules for managing grades,student records, and schedules→ Integration of backend APIs to ensurereliable communication between the frontendand business services→ Bug fixing and delivery of interactive andresponsive interfaces→ Close collaboration with the backend teamthroughout the project→ Adherence to clean code best practicesand on-time delivery
- Ministry of MinesFullStack DeveloperPUBLIC SECTORAugust 2024 - November 2024 (3 months)Fianarantsoa, MadagascarParticipation in the development of an internalfull-stack application for managing incoming and outgoing mailwith PHP/Laravel and React (Inertia.js).→ Development of features for tracking, organizing, and processing document flows→ Creation of a Telegram bot for sending automatic notificationsupon receipt or update of a mail→ Frontend-backend integration for a fluid and coherentuser experience→ Improvement of the application's overall ergonomics and performance
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Education
- Master 2 in Software Engineering and DatabasesNational School of Computer Science
- Degree obtained — 3rd year Professional License in Software Engineering and DatabasesENI FIANARANTSOA,2024