C#/.NET Backend Engineer — REST APIs & SQL Tuning (6m)

Goodman Masson; Greater London; On-site; GBP 101,000 - 120,000; Full time

Job summary

We are partnering on a 6-month contract to deliver a robust C#/.NET backend and high-performance SQL Server solutions. You will design and optimize backend services, RESTful APIs, and microservices to enable secure data flows.

You will work autonomously on complex backend code, implement test-driven development, and integrate CI/CD pipelines in Azure DevOps. Strong focus on maintainability, scalability, and high-throughput systems is essential.

Qualifications

• Hands-on backend C#/.NET experience in production
• Strong SQL Server (T-SQL) performance tuning skills
• Experience building production-grade Web APIs and microservices
• Experience with automated testing and CI/CD in Azure DevOps
• Able to work autonomously on complex backend codebases

Responsibilities

• Focus on backend architecture while building and optimising high-throughput integration pipelines and core services
• Design, build, and consume production-grade RESTful APIs and microservices to facilitate seamless data flows
• Execute complex database engineering tasks in SQL Server (T-SQL), including query optimization, index tuning, and writing complex stored procedures
• Ensure all backend code is resilient, test-driven, and deployed via modern CI/CD pipelines in Azure DevOps
• Work closely with engineering leads to unblock complex backend logic and meet strict project delivery milestones

Skills

C#/.NET Backend

RESTful APIs

SQL Server

T-SQL

CI/CD

Automated testing

Git

Tools

Azure DevOps

Job description

We are partnering on a 6-month contract to deliver a robust C#/.NET backend and high-performance SQL Server solutions. You will design and optimize backend services, RESTful APIs, and microservices to enable secure data flows.

You will work autonomously on complex backend code, implement test-driven development, and integrate CI/CD pipelines in Azure DevOps. Strong focus on maintainability, scalability, and high-throughput systems is essential.