> Markdown version of [/jobs/ext/3520271-senior-software-developer](https://www.wearedevelopers.com/jobs/ext/3520271-senior-software-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Developer - **Company:** Firemelon - **Location:** Belfast, UK - **Experience:** Expert - **Salary:** £60,533.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, JavaScript (Programming Language), .NET Framework, HTML5, Microsoft Azure, Bootstrap (Software), C Sharp (Programming Language), Cascading Style Sheets (CSS), Software Design Patterns, Entity Framework, Design of User Interfaces, Windows Communication Foundation, JQuery, Microsoft SQL Server, Model View Controller (MVC), Object-Oriented Software Development, Systems Integration, Web Applications, Web Application Frameworks, Test-Driven Development (TDD), .NET Core, ReactJS, Git, Solid Principles, Build Tools, Front End Software Development, Elastic Beanstalk, Software Version Control - **Published:** October 2, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5907686509 ## About the Role You will bring 5+ years' industry experience and be a proactive, self-motivated individual with the ability to translate written requirements into functional and technical designs, delivering clean, efficient, and maintainable code. You will be comfortable working collaboratively within a well-established team and contributing to the ongoing development of a globally used product, while continuously developing your own technical expertise., * Extensive commercial experience developing complex, maintainable object-oriented applications in C# within a self-directed environment (primarily .NET Framework with MVC; newer projects using .NET 10 and React) * Proven experience building and integrating REST APIs (or WCF services) * Strong understanding and practical application of design patterns and SOLID principles * Experience working with Microsoft SQL Server * Proficiency in HTML 5, JavaScript (including jQuery), CSS, and front-end frameworks such as Bootstrap * Experience using Git for source control and Azure DevOps for repository and branch management * Experience with Entity Framework * Strong analytical and problem-solving skills with a collaborative team mindset * Excellent communication and interpersonal skills, with the ability to clearly explain technical concepts to both technical and non-technical audiences * Ability to produce clear and structured technical documentation * Self-driven learner who stays current with emerging technologies and industry trends * Strong organisational and time management skills Desirable Criteria * Experience with Microsoft Azure (PaaS services) * Experience working with .NET Core / .NET (modern versions) * Experience with modern JavaScript frameworks such as React (v17+) and npm ecosystem * Familiarity with modern front-end build tools and workflows * Experience applying Test-Driven Development (TDD) practices * Relevant Microsoft certifications ## Description We are seeking an experienced Senior Software Developer to enhance and extend our platform by collaborating with the wider development team to build new public-facing websites and improve operational efficiency through the creation of reusable, scalable code that reduces duplication and supports long-term maintainability., * Develop, maintain, and enhance multiple eCommerce websites * Integrate new UI/UX designs into existing web application frameworks * Implement user interfaces for new features based on client and design specifications * Design, develop, and maintain reusable components (jQuery and C#) across the web application suite * Ensure high standards of performance, scalability, and security across all solutions * Identify and implement improvements to both existing systems and development processes * Collaborate closely with Development, QA, and Project Management teams to deliver high-quality outcomes ## Related Videos - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [WeAreDevelopers LIVE - the weekly developer show with Chris Heilmann and Daniel Cranney](https://www.wearedevelopers.com/videos/1309-wearedevelopers-live-the-weekly-developer-show-with-chris-heilmann-and-daniel-cranney) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [Web development: where are we, and where are we going?](https://www.wearedevelopers.com/videos/524-web-development-where-are-we-and-where-are-we-going) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) ## Related Articles - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)