Senior .NET Backend Engineer – High-Impact APIs

Insightful Technology; Greater London; Hybrid; GBP 55,000 - 75,000; Full time

Benefits offered by this job

Performance bonuses

Travel expenses after probation

WFH on Wednesdays

Gym membership after year one

5 days Christmas leave

Eye test & glasses allowance

Job summary

Insightful Technology in London is seeking an experienced .NET/C# backend engineer to own the core product backend. You will develop, test and optimise APIs, services and integrations, ensuring high performance and security.

You will work with product and engineering teams, maintain deployments via CI/CD, and contribute to design decisions in a fast-paced environment with strong emphasis on technical excellence.

Hybrid working with Wednesday remote option and generous leave and wellness perks.

Qualifications

• Experience engineering software with C#, .NET, ASP.NET, and MS SQL Server.
• Experience building APIs, web services, and system integrations.
• Experience building and supporting event-driven distributed systems.
• Strong understanding of performance and scalability.

Responsibilities

• Develop, test and support .NET applications, APIs and integrations.
• Improve reliability, usability and business value of systems.
• Collaborate with product, engineering and other teams to translate requirements.
• Maintain system integrations between internal platforms and external services.
• Support deployment, troubleshooting and production incidents.
• Participate in code reviews and knowledge sharing.

Skills

C#

.NET

ASP.NET

SQL Server

Entity Framework

LINQ

Async programming

OOP fundamentals

Design patterns

CI/CD

Unit testing

AI coding tools

Tools

CI/CD tooling

Job description

Insightful Technology in London is seeking an experienced .NET/C# backend engineer to own the core product backend. You will develop, test and optimise APIs, services and integrations, ensuring high performance and security.

You will work with product and engineering teams, maintain deployments via CI/CD, and contribute to design decisions in a fast-paced environment with strong emphasis on technical excellence.

Hybrid working with Wednesday remote option and generous leave and wellness perks.