Senior Java Software Engineer jobs in Belfast

Senior Software Engineer - Java / Kotlin At a glance Senior backend role within a product team Java and Kotlin microservices in a Cloud native environment Hybrid working (Belfast) Salary up to £65k The role As a Senior Engineer, you will play a key role in designing, building and owning solutions that directly extend and enhance the client experience. You will collaborate with highly capable...

MCS Group is working exclusively with a high-growth software company with deep roots in Belfast. We're seeking a Senior Software Engineer with strong expertise in Java to join a growing team within their engineering function in Belfast. As a Senior Java Developer, you'll be part of a group driving transformation across some pretty unique industries, helping global brands through the creation of...

Role Overview We are seeking a Java Software Engineer to join a small, technically rigorous founding team building complex, data-intensive engineering systems. The role is remote-first, with periodic in-person collaboration in Oxford or San Francisco. The position involves close collaboration with the Founding Engineer on backend infrastructure, internal platforms, and system architecture. In...

Description You will join the Cloud Platform team, building out new features and functionality to evolve core services and applications that form the foundation of aPrioris Cloud solution. Come join our team and help us drive transformation across the manufacturing supply chain! You can expect to work across the whole stack, from front-end SPAs, through to back-end services. You will own the...

Senior Software Engineer - .Net, Azure. - Contract Fully Remote | Contract Inside IR35 Only | 6 months with extension £750pd+ | Start ASAP Curated is partnering with a global SaaS scale-up undergoing a significant platform modernisation and growth phase. The business is scaling multiple engineering teams and is looking to bring in highly experienced contract Software Engineers to support...

Fully remote, 12-month contract. Who You’ll Work With You’ll work with the Client's team focused on our internal Firm GenAI initiatives. Our team is distributed across multiple locations, including offices in North America, Europe, and Latin America. The team is dedicated to advancing the capabilities and applications of Generative AI within our firm, driving innovation, and delivering...

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...

Job description. Senior Software Engineer - Java Location: Belfast / Hybrid Eligibility: UK work authorisation required This role sits within a global technology business building large-scale platforms used by millions of people every day. You'll join a highly capable engineering team working on complex, high-throughput systems where reliability, performance, and clean design really matter. As a...

Senior QA Engineer - Java / Microservices At a Glance QA Engineer role within a modern Java microservices, event-driven platform Strong focus on backend, API and automation testing Scaleup environment with real-world, high-impact products Hybrid Working (Belfast) Salary up to £65k The Client Our client is an advanced technology scaleup building cutting-edge hardware and cloud software solutions...

MCS Group is delighted to be partnering with a global software company that is driving innovation within the manufacturing technology space. This business is on an exciting journey of modernising its legacy product portfolio and expanding its best-in-class automation solutions - and they are now seeking an experienced Senior Software Engineer (Tech Lead) to join their growing team. ?? Location:...

Do you enjoy designing and building scalable backend systems in the cloud - with Java at the core and AWS powering it all? My client is looking for a Senior Java Engineer to join a highly capable engineering team working on modern, cloud-native systems. This role offers real ownership, technical depth and the chance to shape how systems are built and run on AWS. What you'll be doing Designing,...

MCS Group is looking for an experienced Test Automation Engineer / Software Developer in Test to join a delivery-focused team on an initial 3-month contract. The contract is very hands-on and is suited to someone coming from a strong Java background with a passion for test automation and quality engineering. The Details: This role requires prior experience of Java for test automation. Cucumber or...

Senior Java Developer - 100% remote. * Salary: up to £70k + bonus+ benefits. About the Company: Our client is a global technology company operating in the payments space. They're investing heavily in their engineering capability across Northern Ireland, with a focus on building modern, scalable platforms that support businesses in managing and growing their operations. Their engineering teams...

About the Company: Our client is a fast-growing global trading firm with deep expertise across traditional and digital asset markets. Built by technologists and financial engineers, their platforms are designed for scale, resiliency, and high performance. They are now establishing a new engineering hub in Belfast as part of a long-term investment to build core trading systems and infrastructure...

About the Company: Our client is a fast growing global trading firm building a brand new engineering hub in Belfast in 2026. Founded by a team of technologists and financial experts, the company develops advanced trading platforms and enterprise systems that operate at scale, supporting a wide range of strategies and asset classes. Having successfully navigated multiple market cycles, they're now...

Senior Full Stack Software Engineer Location: UK Remote Engagement: Permanent Interview process: Single stage technical interview At OCHO, we build teams for organisations where engineering excellence genuinely matters. This role sits within a high performing product group developing large scale operational software used daily by thousands of field based users. The team moves quickly, values...

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...

Company A global, product-led technology business building large-scale digital platforms used by major retail and consumer brands worldwide. This is a true product engineering environment, not consultancy or project-based delivery, with long-term ownership of complex systems operating at significant scale. The Role You'll play a key role in designing and evolving highly scalable backend services...

Principal Java Engineer Java | Kotlin | Cloud Native At a glance Principal level backend role with architectural ownership Java and Kotlin microservices in a cloud native environment Hybrid working in Belfast Salary up to £80k plus bonus The role As a Principal Java Engineer, you will provide technical leadership across a critical product area, shaping architecture, guiding engineering standards...

Candidates must be based in NI All applications not based in NI will be disregarded Do you enjoy building robust, scalable systems that handle real complexity - and doing it with modern Java and AWS? My client is looking for a Staff Java Engineer to play a key role in designing and delivering high-performance backend services in a cloud-first environment. This is an opportunity to work on...