API for SaaS
Complete REST API with authentication, roles, pagination and documentation.
Node.js / TypeScript expertise
Node.js and TypeScript Freelance Developer — Back-end expertise
Freelance developer expert in Node.js and TypeScript. API, job queues, authentication, integrations and PostgreSQL.
You need solid back-end expertise
You're looking for a back-end developer who masters Node.js and TypeScript to build high-performance APIs, robust job queues and reliable integrations. A developer who understands security, performance and maintainability concerns on the server side. My Node.js/TypeScript expertise is built on real projects: REST APIs, third-party integrations, authentication systems and data processing pipelines.
Who this service is for
Suitable if
- You need a high-performance REST or GraphQL API
- You're looking to implement robust authentication
- You have complex third-party integrations (payments, emails, APIs)
- You want to improve your Node.js back-end performance
Not suitable if
- Your project uses Python, Ruby, Go or another back-end stack
- You're looking for a junior profile for simple CRUD API
Expected results
- A high-performance, documented REST or GraphQL API
- A secure and maintainable authentication system
- Reliable and tested third-party integrations
- A scalable back-end ready for production
Deliverables
- REST or GraphQL API with documentation (OpenAPI/Swagger)
- Authentication system (JWT, OAuth, sessions)
- Third-party integrations (payments, emails, external APIs)
- Job queues and asynchronous tasks
- PostgreSQL query optimization
- Unit and integration tests
- Dockerization and deployment
Scope examples
Service integration
Connector with third-party APIs: payment (Stripe), emails (SendGrid), storage (S3).
Data pipeline
Data processing system with job queues, validation and storage.
Work method
I work with Node.js, TypeScript, Express or Fastify, PostgreSQL, Docker. I set up automated tests and complete API documentation.
Pricing
Starting at €450 / day
Staff augmentation
Direct mission or via Malt. The rate depends on duration and technical complexity.
Frequently asked questions
Do you use Express or another framework?
I primarily use Fastify for new projects (better performance) and Express for existing projects. The choice depends on context.
Do you set up API documentation?
Yes. I set up OpenAPI/Swagger documentation for all APIs I develop.
Do you work with PostgreSQL or other databases?
Primarily PostgreSQL. I also have experience with MongoDB and Redis depending on project needs.
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Let's discuss your back-end project
Describe your project, current stack and Node.js/TypeScript expertise need.
Contact me