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Senior Software Engineer

Haystack
Department:Web Design
Type:REMOTE
Region:UK
Location:United Kingdom
Experience:Mid-Senior level
Salary:£50,000 - £60,000
Skills:
.NET COREC#SQL SERVERBLAZORRAZOR PAGESEF COREHTMLCSSJAVASCRIPTJQUERYRESPONSIVE DESIGNWEB SECURITYAPPLICATION ARCHITECTUREDATABASE DESIGNGIT
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Job Description

Posted on: January 29, 2026

Senior Software Engineer - .NET Core, Blazor, SQL Server |United Kingdom| Remote | £50,000 - £60,000 We're working with Applause IT Recruitment on this exciting opportunity. Join a highly impactful, tech-driven not-for-profit organisation tackling one of the world's most pressing health challenges. As a Senior Software Engineer, you'll evolve and scale their bespoke platform, powered by cutting-edge .NET Core, Blazor, and SQL Server technologies, making a global impact by distributing tens of millions of life-saving resources annually. The Role

  • Develop and maintain robust internal and external systems using .NET Core, Blazor, and SQL Server
  • Design secure, scalable, and efficient relational databases
  • Take ownership of projects from analysis to deployment, collaborating with an agile team on tech and process improvements
  • Contribute to architecture, UX, and security decision-making, occasionally mentoring junior developers

What You'll Need

  • 5+ years of experience with .NET Core, C#, SQL Server
  • Proficiency with Blazor, Razor Pages, and EF Core
  • Strong front-end skills including HTML, CSS, JavaScript/jQuery, and responsive design
  • Solid understanding of web security, application architecture, database design, and Git for modern deployment workflows

What's On Offer

  • Work with purpose – your code directly supports millions of people worldwide
  • Join a focused, collaborative, and mission-driven remote-first team
  • Fully remote (UK-based) with flexible working arrangements
  • Competitive salary of £50,000 - £60,000, company pension, and 25 days holiday + bank holidays

Apply via Haystack today!

Originally posted on LinkedIn

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