Senior .Net Developer

JR United Kingdom; Southampton; On-site; GBP 50,000 - 75,000; Full time

Job summary

A leading technology company in the UK seeks a Senior Software Developer to join their agile team in Lisburn. The role emphasizes a strong .NET background with responsibilities in software design, mentoring, and architecture influence. The ideal candidate will have 3-5 years in software development, be passionate about clean code, and thrive in a collaborative environment. This hybrid position offers an exciting opportunity to shape the future of internal platforms.

Qualifications

• 3-5+ years of commercial experience in software development.
• Strong skills in C#, .NET Core, Angular, and DevOps practices.
• Experience in mentoring junior engineers and working in Agile teams.

Responsibilities

• Designing and maintaining internal and client-facing software.
• Leading development of new features and refactoring legacy systems.
• Mentoring junior developers and translating business needs into technical solutions.

Skills

C#

.NET Core

Angular

MS SQL

Entity Framework

Docker

AWS ECS

CI/CD

API design

RESTful services

Git

Job description

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? Senior Software Developer - Lisburn (Hybrid/On-Site)

? Location: Lisburn, Northern Ireland

? Contract: Permanent, Full-Time (37.5 hrs/week)

? Work Setup: Hybrid / On-site

We're hiring a Senior Software Developer to join a small, agile engineering team working on impactful, business-critical software. This is a hands-on full-stack role with a strong focus on the .NET ecosystem. You'll play a leading part in maintaining and evolving internal applications and building out new product features with direct access to decision-makers and real influence over tooling, architecture, and delivery practices.

? What You'll Be Doing:

• Designing, building, and maintaining internal and client-facing software using C#, .NET, Angular, and related technologies
• Leading the development of new features using modern DevOps and deployment practices (Docker, AWS ECS, CI/CD)
• Refactoring and optimising legacy systems for performance, scalability, and maintainability
• Mentoring a junior developer through code reviews, guidance, and best practices
• Collaborating with business stakeholders to translate needs into efficient technical solutions
• Contributing to architectural decisions, technical direction, and documentation

? What You Bring:

• 3-5+ years of commercial experience in software development (ideally in regulated or B2B environments)
• Strong skills in:
• C# / .NET Core / .NET Framework
• Angular or similar front-end frameworks
• MS SQL, Entity Framework, MVC
• Docker, AWS ECS, and DevOps practices
• Proficiency in API design, RESTful services, and data flows
• Experience in mentoring junior engineers and promoting team best practices
• Comfortable working in a fast-paced, Agile team environment
• Strong version control knowledge (Git) and CI/CD pipeline familiarity

? You'll Thrive If You're:

• A thoughtful problem-solver with a bias for action
• A confident communicator who works well with technical and non-technical teams
• Passionate about clean, maintainable code and scalable design
• Keen to mentor and support the growth of others
• Always learning, curious, and willing to try new tools and approaches

If you're ready to shape the future of internal platforms, influence architecture decisions, and make a real impact reach out to Ryan Quinn on LinkedIn to discuss further or apply via the link below.