Backend Web Developer

API Design & Development

· Design and maintain RESTful APIs using Express.js with clean architecture (controllers → services → models).

· Implement advanced MongoDB patterns:

o Schema design (normalized/denormalized)

o Compound, text, TTL, and indexes

o Efficient aggregation pipelines and pagination

· Handle secure file uploads to DigitalOcean Spaces (S3-compatible):

o Multipart uploads via Multer

o File validation, signed URLs, and optional image processing

· Implement robust authentication:

o JWT with httpOnly cookies and refresh token rotation

o bcrypt password hashing, CSRF protection, rate limiting

· CORS, input validation (Zod/Joi).

Required Skills

· ✅ 1+ years with Node.js and Express.js

· ✅ Advanced MongoDB & Mongoose: indexing, aggregation, transactions, performance tuning

· ✅ Experience with cloud storage (DigitalOcean Spaces, AWS S3, or similar)

· ✅ Strong security mindset: auth, encryption, input sanitization

· ✅ Proficiency in TypeScript, REST API design, Postman

Business Logic

- Implement features like cron jobs, background tasks, payment logic, assignment.

- Use service-based architecture.

Performance & Scalability

- Query optimization and caching (Redis).

- Cron jobs with node-cron.

Security

- Use Helmet, CORS, rate-limit.

- Secure JWT strategies.

- Manage environment configs.

Documentation

- Provide Postman collections.

Collaboration

- Share API contracts early.

- Provide mocks or sample JSON when backend not ready.

- Notify frontend of breaking changes.