principal .net engineer jobs in Belfast

You will influence architecture and delivery end-to-end, working closely with architects, senior engineers and business stakeholders across regions. The role combines hands-on technical leadership with ownership of delivery, mentoring engineers and championing modern engineering practices across distributed, cloud-native systems.

MCS Group is delighted to be partnering with a leading Northern Ireland-based technology organisation to recruit a Principal Software Engineer at a pivotal time in their growth journey. This is an exciting opportunity to join a business that specialises in delivering complex, bespoke software solutions to both public- and private-sector clients. With a dynamic, forward-thinking culture, they're...

Company description We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our teams of interdisciplinary experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over...

Gearset is the leading DevOps platform for Salesforce - our users can build and manage many aspects of their Salesforce development from within Gearset, from complex CI/CD pipelines to disaster recovery. The Gearset platform is a standalone tool that sits outside of the Salesforce platform, integrating via public APIs only. So while our engineering team doesn't develop within the Salesforce...

Principal Software Engineer Fully Remote | Permanent | Competitive Salary + Benefits Harrington Starr has partnered with a leading Global Payments Technology company who are seeking to hire a Principal Software Engineer to join their senior engineering leadership team. This is a rare opportunity to combine hands-on development with strategic influence, guiding architecture decisions and shaping...

As a product-driven company founded by engineers, we know the value of a great engineering culture, and we're looking for a Principal DevOps Engineer to join a team built from the ground up on trust, teamwork and tight feedback loops. As a Principal DevOps Engineer you'll work collaboratively using a pragmatically-chosen modern tech stack (Kubernetes, AWS, Terraform, .NET) to help Gearset run a...

.Net Software Developers (Mid-Level) Location: Belfast (Hybrid) | Type: Full-Time | Permanent MCS Group is delighted to be working with a global market leader in financial services technology that is building one of the largest and most advanced engineering hubs in Belfast. MCS have helped this company hire over 150 people and they are a core delivery hub working on business-critical trading and...

You will set technical direction, influence architecture, and lead engineering standards across complex Rates and FX platforms. This role suits someone who wants real impact, scale, and accountability, not just delivery. Working in an Agile environment, you will partner closely with architects, engineers, and stakeholders across regions to drive resilient, high-quality systems.

You will guide engineers of varying levels, influence technical direction, and ensure systems meet high standards for security, scalability, and reliability.

MCS Group is delighted to be working with a well-established, Belfast based financial services organisation as they look to appoint an IT Development Lead to head up their in-house development function. This role will be based in Belfast, allowing for hybrid working (flexible 2 in offfice, 3 from home) after an initial training period. This is a key leadership role within the wider technology...

You will shape cloud architecture, modernise legacy platforms, and enable high performing, multi disciplinary teams to deliver long term, sustainable improvements across performance, reliability, and developer experience.

You will play a key role in influencing product direction, setting engineering standards, and guiding the evolution of core platforms.

This role focuses on building scalable .NET 8+ services and APIs hosted on AWS, using modern cloud-native architecture and Infrastructure as Code. The position offers the chance to contribute to high quality software solutions that support critical market infrastructure across multiple regions. What You Will Be Doing: Designing and developing services and APIs with C# and .NET 8+ Integrating...

You will play a key role in designing, delivering, and supporting system integrations for enterprise customers. Working closely with technical stakeholders, you will lead discovery sessions, translate business requirements into scalable technical solutions, and ensure seamless flow between customer systems and the platform.

Senior Software Engineer (.NET) Back end Location: Belfast / Hybrid Eligibility: UK work authorisation required We are working with a global financial services technology organisation that builds business-critical platforms used across international markets. They're looking for a Senior Software Engineer to join a highly capable engineering team delivering scalable, cloud-native systems. This is...

Are you a .NET Software Engineer looking to take the next step in fintech, working on systems where performance, reliability and clean code genuinely matter? My client is a fintech organisation building and enhancing high-volume, business-critical platforms. They are looking for a .NET Software Engineer with around 3-4 years' commercial experience who enjoys solving real problems, working with...

Are you a .NET Software Engineer looking to build robust, high-quality systems within fintech and continue developing your technical skill set? My client is a fintech organisation developing scalable, business-critical platforms used in a fast-paced environment. They are seeking a .NET Software Engineer with around 3-4 years of commercial experience who enjoys writing clean code, working on...

.NET Engineer (4-5 Years' Experience) Are you a .NET Engineer looking to take the next step in your career, working on meaningful systems with real-world impact? We are working with my client to hire a .NET Engineer with 4-5 years' commercial experience to join a growing engineering team. This role is well suited to someone who enjoys building robust, scalable applications and collaborating...

Are you a Senior Back-End Engineer who likes owning problems end to end rather than just ticking off tickets? This is a long-term opportunity to join a team that values delivery, curiosity, and building things the right way. You'll be trusted to get on with the work, contribute to technical decisions, and play an active role in how the team operates day to day. You'll fit well here if you: Enjoy...

Principal Software Engineer - (Fully Remote) The Opportunity Ocho is partnering with a fast-growing, product-led client to hire a Principal Software Engineer to help shape and deliver the next generation of their platform. This is a hands-on role focused on designing, building, and scaling modern backend systems in a fully remote environment. Key Responsibilities Own and deliver high-quality,...

Principal & Staff Software Engineers At a glance Principal or Staff Software Engineer role on a mission-critical payments platform Lead engineers and influence architecture, design, and delivery Remote-first with a Belfast city centre office Strong salary, excellent benefits, and genuine technical ownership About the Company Our client is a global payment technology business operating at...