Senior Software Engineer

CompanyWave Talent

LocationLondon Area, United Kingdom

Posted At1/23/2026

UK Visa Sponsorship Analytics

Occupation Type

Programmers and software development professionals

Occupation Code Skill LevelHigher Skilled

Sponsorship Salary Threshold

£54,700 (£28.05 per hour)

Occupation rate applies

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Description

Job Title - .NET Developer (Contract)

Location - London (Hybrid – 2–3 days onsite)

Contract Type - Contract (Outside IR35 / Inside IR35 – depending on client)

Duration -12 months (likely extension)

Day Rate - Competitive

Role Overview

We are looking for an experienced .NET Developer to join a delivery-focused engineering team working on business-critical systems in a fast-paced London-based environment. The role will involve building, enhancing and supporting modern .NET applications, collaborating closely with product, QA and DevOps teams, and contributing to the ongoing modernisation of legacy platforms.

This is a hands-on contract role suited to a developer who is comfortable owning features end-to-end and working in production environments.

Key Responsibilities

Design, develop and maintain applications using C# and .NET / .NET Core
Contribute to the development of RESTful APIs and backend services

Work on the modernisation and refactoring of legacy .NET applications

Collaborate with product managers, business analysts and QA to deliver high-quality features

Write clean, testable and maintainable code following best practices

Participate in code reviews and contribute to improving engineering standards

Support production systems, including bug fixing and performance tuning

Work within Agile / Scrum delivery teams

Required Skills & Experience

Strong commercial experience with C# and .NET / .NET Core
Experience building and consuming REST APIs
Solid understanding of object-oriented design and software engineering principles
Experience with SQL Server and relational databases
Familiarity with unit testing frameworks (e.g. xUnit, NUnit, MSTest)
Experience working in Agile delivery environments
Comfortable working as a contractor in a delivery-focused role

Nice to Have

Experience with cloud platforms

(Azure preferred; AWS also acceptable)

Knowledge of Docker and containerised applications

Frontend experience with Angular, React or Blazor

CI/CD experience using Azure DevOps, GitHub Actions or similar

Experience in financial services or other regulated environments

If you’re a Senior .NEt Developer who wants challenging work, modern tools, and the freedom that comes with contract roles, we’d love to hear from you.