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Senior C# Developer

Senior C# Developer

On site

Sheffield, United kingdom

Full Time

26-03-2025

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Job Specifications

Hybrid working: 2 days in the office, 3 days remote (or office if preferred)

The Role
As a Senior Software Engineer, you’ll play a key role in driving our mission forward, working in a collaborative, self-organizing squad to solve real-world problems. You’ll work closely with product managers, designers, and fellow engineers to design and implement scalable, reliable, and efficient solutions.

What you’ll be doing:
Building and maintaining web-based applications with C#
Defining tasks end-to-end, delegating work, and implementing solutions
Continuously improving the platform and contributing to the technical roadmap
Ensuring security best practices to safeguard against vulnerabilities
Mentoring junior engineers and fostering a culture of knowledge-sharing
Developing your skills through professional development opportunities and a dedicated learning fund

Tech Stack
We leverage modern technology to build scalable solutions:
C# & .NET – powering backend systems
Azure Functions – enabling serverless and event-driven architectures
Azure Event Grid – seamless event-based messaging
Cosmos DB – scalable cloud database
Terraform – managing infrastructure as code

What we’re looking for:
Strong experience building web applications with C#
Solid domain modeling skills using Object-Oriented principles
Experience writing automated tests with NUnit, MSTest, or xUnit
Strong understanding of web security best practices
Excellent communication skills, adaptable to different technical audiences

Why join us?
Along with the role, the people, and our culture, here are a few reasons why our team loves working here:
Growth Opportunities: Your development matters. With an annual development fund, you can pursue personal and professional growth.
Well-being Support: Regular coaching sessions to support mental health and a focus on well-being.
Generous Time Off: 25 days holiday (plus UK Bank holidays), plus additional days for long-term employees.
Family Support: 3 months of fully-paid time off for parental leave.
Collaborative Team: We’re passionate about what we do and work together to make a real difference.

What’s next?
If you’re excited about solving tech challenges and improving the rental experience, click apply—it only takes a few minutes!

We’re committed to building an inclusive environment. If you need any adjustments during the interview process, let us know. We’d love to hear from you!

About the Company

Discover Haystack - the UK's fastest growing tech hiring marketplace. Driven by our award-winning mobile app and web platform, Haystack connects active and passive tech talent directly with hiring managers and talent acquisition teams. We're trusted by over 150,000+ UK-based techies, working in Software Engineering, Data, Design, DevOps, Cloud, Tech Management, Testing, Product & Delivery, Architecture and more. 100s of employers from startups and scale-ups like Atom Bank, DuckDuckGo and Football Radar to established e... Know more