Summary: The Senior Back End Engineer role involves developing and maintaining secure, scalable backend systems for a technology-led company that is modernizing enterprise platforms. This fully remote, 8-week contract position is open to UK and EU-based engineers and emphasizes collaboration with product and engineering teams to create robust systems. The role requires a strong focus on security, reliability, and scalability in backend services. The position offers a competitive daily rate and is classified as outside IR35.
Key Responsibilities:
- Build and maintain secure, multi-user backend services
- Implement role-based access control, audit logging, and data integrity controls
- Design and scale high-concurrency GraphQL APIs
- Develop event-driven systems
- Ensure systems are observable, resilient, and cloud-ready
- Contribute to architecture decisions, documentation, and best practices
Key Skills:
- Strong experience building enterprise-grade backend systems
- Proven ability to design for scale, security, and reliability
- Solid understanding of APIs, authentication, concurrency, and data integrity
- Experience shipping systems used in real, multi-user environments
- Comfortable working with incomplete requirements and tight timelines
- Clear, concise communicator in async teams
Salary (Rate): £400 daily
City: London Area
Country: United Kingdom
Working Arrangements: remote
IR35 Status: outside IR35
Seniority Level: Senior
Industry: IT
Senior Back End Engineer (Contract) We’re working with a technology-led company building a modern enterprise platform used by large organisations. The product replaces legacy systems with scalable, secure, and reliable software. This is an 8-week contract, outside IR35, fully remote, open to UK & EU-based engineers, paying £400 per day and starting immediately.
The Role You’ll be responsible for key backend systems that support enterprise, multi-user workflows, with a strong focus on scalability, security, and reliability. You’ll work closely with internal product and engineering stakeholders to turn evolving requirements into robust, production-ready systems.
Responsibilities
- Build and maintain secure, multi-user backend services
- Implement role-based access control, audit logging, and data integrity controls
- Design and scale high-concurrency GraphQL APIs
- Develop event-driven systems
- Ensure systems are observable, resilient, and cloud-ready
- Contribute to architecture decisions, documentation, and best practices
Tech Stack TypeScript Postgres GraphQL Cloud infrastructure (AWS and GCP) Node.js
Requirements Strong experience building enterprise-grade backend systems Proven ability to design for scale, security, and reliability Solid understanding of APIs, authentication, concurrency, and data integrity Experience shipping systems used in real, multi-user environments Comfortable working with incomplete requirements and tight timelines Clear, concise communicator in async teams
