Backend Developer

VE3; City Of London; On-site; GBP 45,000 - 60,000; Full time

Job summary

A technology services company in the City of London is seeking an experienced Backend Developer to design, develop, and maintain scalable backend services and REST APIs using Python and Node.js. This full-time role requires proven skills in backend development, API design, and database management, with a collaborative work environment among product, front-end, and DevOps teams.

Qualifications

• Strong experience with backend development in Node.js and/or Python.
• API design best practices such as versioning and error handling.
• Experience with containerization and API documentation.

Responsibilities

• Build RESTful APIs and microservices using Node.js and/or Python.
• Design and manage relational and NoSQL databases.
• Integrate with 3rd-party APIs and optimize system performance.

Skills

Backend development in Node.js

Backend development in Python

API design best practices

Database design and querying

Containerization (Docker/Kubernetes)

Security principles

Git-based workflows

Tools

PostgreSQL

MongoDB

FastAPI

Django

Flask

Swagger/OpenAPI

Job description

Overview

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 DevOps teams to deliver high-performance, secure, and reliable systems.

Responsibilities

• Build RESTful APIs and microservices using Node.js (Express/NestJS) and/or Python (FastAPI/Django/Flask)
• Design and manage relational and NoSQL databases (PostgreSQL, MongoDB)
• 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 DevOps, CI/CD, and deployment workflows

Required Skills

• 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, MongoDB, or DynamoDB)
• 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

Nice to Have

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

Soft Skills

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

Seniority level

• Associate

Employment type

• Full-time

Job function

• Information Technology

Industries

• IT Services and IT Consulting