Principal Software Engineer jobs in Antrim County

You should also expect to work across the full stack and every stage of the product lifecycle, from system design through to build, test, deployment and supporting systems in production, so you should be skilled in practices like TDD, CI/CD, IaC and Observability.

You will work closely with Senior, Staff and Principal Engineers across Belfast and the wider global engineering organisation, contributing to large scale distributed systems while acting as a technical authority within the team. This role offers a strong mix of hands-on development, architectural decision making and mentorship.

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...

MCS Group is thrilled to be partnering exclusively with fast-growing technology company in the energy sector. They are expanding their Belfast engineering team and are looking for a Staff Software Engineer to join and hit the ground running. The company builds a platform connecting businesses with external partners, helping large-scale operations work more efficiently and reliably. Day-to-day...

You will drive the product development process from an architectural and technical leadership standpoint to ensure the delivery of best‐in‐class outcomes for our customers. Specifically, your focus will be to:

Principal Developer - Belfast | Hybrid | Public & Private Sector Projects Join a leading technology solutions provider delivering complex case management and bespoke applications for government and private clients. I am working with my client to hire a Principal Developer to lead technical design and delivery of cloud-based software solutions. This is a key leadership role where you'll set...

Senior/Principal Software Engineer - Cloud Platform (Hybrid, Belfast) We're partnered with a global software company seeking a Senior Software Engineer to join their Cloud Platform team in Belfast. You'll be part of a group driving transformation across the manufacturing and engineering sector through cutting-edge cloud solutions. What you'll be doing: Designing and building new features for a...

You will work closely with Senior, Staff and Principal Engineers across Belfast and the wider global engineering organisation, contributing to large scale distributed systems while acting as a technical authority within the team. This role offers a strong mix of hands-on development, architectural decision making and mentorship.

A leading cloud technology firm in Belfast seeks a Sr Principal Software Engineer to lead architectural development for unified exposure management initiatives. The role requires collaboration with engineering teams to ensure product delivery aligns with customer needs. Candidates must have a minimum of 12 years in software development, ideally with expertise in Java, and possess strong...

You will work closely with Senior, Staff and Principal Engineers across Belfast and the wider global engineering organisation, contributing to large scale distributed systems while acting as a technical authority within the team. This role offers a strong mix of hands-on development, architectural decision making and mentorship.

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,...

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.

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...

You will work closely with Senior, Staff and Principal Engineers across Belfast and the wider global engineering organisation, contributing to large scale distributed systems while acting as a technical authority within the team. This role offers a strong mix of hands-on development, architectural decision making and mentorship.

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

Senior Software Engineer Location: Belfast, UK (Remote-first / Hybrid options available) Contract Type: Permanent Level: Senior (Individual Contributor - backend focus) The Opportunity We're looking for a Senior Backend Engineer to join a highly collaborative and structured Content Core team. This team is the first major entry point for user-generated content workflows, responsible for...

Principal Front-End Engineer (React) Experience level: 10+ years Have you spent years building front-end systems that scale - and now want a role where your decisions genuinely shape how products and teams operate? My client is looking for a Principal React Engineer to take ownership of front-end architecture, set engineering standards, and act as a technical authority across multiple product...

You will work closely with product, design, and engineering leadership to deliver scalable features, drive engineering best practice, and support the development of junior engineers.

You will design and build scalable backend services, APIs, and integrations, while working closely with Product and UX to scope features, refine requirements, and contribute to roadmap direction.

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.

You will work closely with Senior, Staff and Principal Engineers across Belfast and the wider global engineering organisation, contributing to large scale distributed systems while acting as a technical authority within the team. This role offers a strong mix of hands-on development, architectural decision making and mentorship.