Backend Developer

Location:

City Of London, England, United Kingdom

We are seeking an experienced Backend Developer to design, develop, and maintain scalable backend services and REST APIs using Python and Node.js. You will work closely with product, front-end, and Dev Ops teams to deliver high-performance, secure, and reliable systems.

• Build RESTful APIs and microservices using Node.js (Express/NestJS) and/or Python (FastAPI/Django/Flask)
• Design and manage relational and No
  
  SQL databases (Postgre
  
  SQL, Mongo
  
  DB)
• Implement user authentication and authorization (OAuth2, JWT)
• Integrate with 3rd-party APIs and external services
• Optimize system performance and monitor API uptime
• Write unit/integration tests
• Collaborate on Dev Ops, CI/CD, and deployment workflows

• Strong experience with backend development in Node.js and/or Python
• API design best practices (versioning, error handling, rate limiting)
• Database design and querying (SQL, Mongo
  
  DB, or Dynamo
  
  DB)
• Experience with containerization (Docker/Kubernetes) and API documentation (Swagger/OpenAPI)
• Knowledge of security principles (input validation, CORS, XSS, etc.)
• Git-based workflows and agile development practices

• Experience with GraphQL
• Task queues and async jobs (Celery, BullMQ, Rabbit
  
  MQ)
• Familiarity with cloud platforms (AWS, GCP, Azure)
• Logging and monitoring (ELK, Prometheus, etc.)

• Strong problem-solving mindset
• Clear documentation and communication skills
• Team player with the ability to work independently

• Associate

• Full-time

• Information Technology

• IT Services and IT Consulting