Senior Web Services Engineer

Contract Senior Web Services Engineer

3-6 Month Contract

Hourly Rate in USD – Negotiable

Fully Remote – Open to candidates worldwide

We are seeking a Senior Web Services Engineer to join on a contract basis, working remotely with a globally distributed team. This role is ideal for someone who thrives in ambiguity, enjoys problem-solving, and can design scalable, high-performing systems that integrate legacy platforms with modern web services.

• Design and implement scalable database schemas and API interfaces to support large-scale user-generated content with a focus on security, performance, and developer experience.
• Architect clean, performant RESTful APIs, Graph
  
  QL solutions, and AI-powered features integrating platforms such as Stripe, Shopify, Salesforce, and OpenAI.
• Build and integrate Customer Data Platforms (CDPs) and AI/ML capabilities (semantic search, RAG, vector embeddings, prompt engineering).
• Drive end-to-end project delivery – from scoping requirements to hands-on development in Python, Node.js, Go (with some PHP).
• Troubleshoot third-party integrations, resolve performance bottlenecks, and develop automated tests.
• Collaborate with cross-functional teams across multiple time zones, translating complex business requirements into clear, actionable solutions.

• 5+ years’ backend API development experience with Python/Django, Node.js/NestJS, or Golang/Gin.
• Proven experience building APIs for enterprise-grade apps with complex integrations.
• Strong skills in system design and SQL data modeling for high-traffic applications (10k+ daily users).
• Hands-on experience with LLM/AI features (semantic search, vector DBs, RAG, prompt engineering).
• Comfortable working in fast-paced, agile environments and collaborating with global teams.
• Excellent communication skills with the ability to explain technical trade-offs to non-technical stakeholders.

Rates depend on experience and client requirements

• Job Reference: JO-
• Salary:
  Hourly
• Job
  
  Start Date:
  
  ASAP
• Job Industries:
  Software Engineering
• Job Location s:
  Greater London
• Job Types: Contract