2,267+ Principle Java Engineer Jobs in Belfast, UK — Local Employers Hiring June 2026

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Principle Java Engineer

Principle Java Engineer Salary to £70k-£90k + company options scheme ( for £90k you will have to be their Unicorn candidate i.e. having hands on experience of working with Camunda + having SC clearance already in place + being eDV eligible. They will consider remote workers, if you are prepared to occasionally ...

Principle Data Engineer

Principal Data Engineering Lead UK Wide | Defence & National Security | Up to £140,000 + Package The UK's defence landscape is changing. AI, advanced analytics and modern data platforms are becoming mission-critical capabilities across government, defence and national security ...

Java Engineer

Enso Recruitment is proud to be working with a global, technology-driven financial services organisation who are expanding their engineering capability within a highly critical connectivity platform. They are now seeking an experienced Java Engineer to join a specialist team ...

Java Software Engineer

A prominent IT consultancy is actively searching for a talented Full Stack Engineer to join their team on a permanent basis. The ideal candidate will possess extensive experience in developing robust web applications using Java (Spring Boot), HTML, CSS, and JavaScript/TypeScript. This role offers an exciting ...

Principal Java Engineer

Principal Java EngineerUp to £120,000Candidates must be based in Belfast All applications not based in Belfast will be disregarded Do you enjoy shaping the technical direction of complex, large-scale systems - and doing it with modern Java at the highest level? My client is loo ...

Senior Java Engineer

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 ...

Junior Java Engineer

Consultant - Junior Java Engineer - DE - TC - UKI - Belfast Location: Belfast Other locations: Primary Location Only Salary: Competitive Date: 27 May 2026 Job description Requisition ID: At EY, we’re all in to shape your future with confidence. ...

Software Engineer (Java)

Want to build products that actually scale and see the impact of your work quickly? My client is looking for a mid-level Software Engineer to join a collaborative platform engineering team based in Belfast . This role sits right at the core of their ...

Principle Legal Officer

Job description Principal Legal OfficerLocation: Lanyon Plaza, Belfast Pay: £61,673 per annum Hours: Monday to Friday Contract: Temporary ongoing Hours: 37 per weekStaffline Recruitment Ireland is currently recru ...

Senior Software Engineer Java

Senior Software Engineer Java Belfast | Hybrid | Permanent At a Glance Senior backend role on a collaborative, globally distributed engineering team Core services work powering a high-scale ...

Software Engineer, Java Backend

About the job Software Engineer, Java Backend Job Description: Location: On-site, Hybrid. Start date: As soon as possible. Languages: Fluent in English. Join the Mineo Team Were Hiring! At Mineo, we are creating the future of recruitment with an innovative ...

Senior Java Software Engineer

Ocho Belfast, Northern Ireland, United Kingdom Senior Java Software Engineer This range is provided by Ocho. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. (New Cloud Security company that recently set up in Belfast with 14 ...

Java Software Engineer, £60k

The Opportunity You will play a key role in designing, developing, and maintaining critical backend services that support enterprise‑scale platforms. Working within a highly collaborative engineering team, you will contribute to major backend modernisation initiatives spanning application ...

Software Engineer Java/JavaScript/Python

MCS Group is delighted to be partnering with a global technology organisation as they expand their Cyber Security Engineering teams with the addition of multiple Software Engineers across varying levels of experience. This is an opportunity to join a modern, cloud-first engineering environm ...

Java Developer

About the Role You'll be working on the backend of systems that move money; payment processing engines, merchant integration services, and the microservices that orchestrate transactions across multiple payment rails. This means designing APIs that handle edge cases gracefully, building services ...

Java Developer

MCS Group | Your Specialist Recruitment Consultancy This range is provided by MCS Group | Your Specialist Recruitment Consultancy. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base Pay Range MCS Group is thrilled to partner with ...

Java Developer

Job title: Java Developer - Regulatory Reporting (Capital Markets) Location: Belfast, Northern Ireland Work Mode: Hybrid (3 Days Onsite) Duration: Contract until Feb 2027 Must-Have Skills 5+ years of Java Development experience Strong hands-on experience w ...

Java Backend Engineer Cloud & Distributed Systems

Job DescriptionMy client, a global technology company specialising in secure communications and enterprise software solutions, is hiring a Backend Software Engineer to join an established engineering team based in Belfast. This is an exciting opportunity to work on business-critical backend ...

Senior Software Engineer (C++, Go, Java)

Senior Software Engineer (C++, Java or Go) Overview Ocho is delighted to be exclusively partnering with our client to recruit a Senior Software Engineer into one of the most successful and fastest-growing technology divisions within a global software organisation. Thi ...

Senior Java Engineer FiTP (Hybrid Belfast)

Citibank (Switzerland) AG in Belfast is looking for a Java Developer (AVP) to engineer solutions for global finance. This role involves working within the Global Fixed Income Trade Processing Team, focusing on designing and developing complex distributed systems. Candidates should possess strong knowle ...

Hybrid AWS Backend Engineer Golang/Java

A leading security technology company in Northern Ireland seeks a Backend Engineer to manage project lifecycles from design to deployment. The successful candidate will have at least 1 year of experience in Golang or Java, alongside knowledge of cloud platforms such as AWS or Azure. This role offers a hybrid wor ...

Java Backend Engineer – Fintech Payments & Microservices

Mifinity in Belfast is seeking a backend developer to work on payment processing engines and merchant integration services. The role involves developing efficient Java code and ensuring scalability of applications. Ideal candidates have a minimum of 3 years’ experience in Java enterprise software, with ...

Senior Software Engineer (C++, Go, Java)

Senior Software Engineer (C++, Java or Go) Overview Ocho is delighted to be exclusively partnering with our client to recruit a Senior Software Engineer into one of the most successful and fastest-growing technology divisions within a global software organisation. This is a rare o ...

Junior Java Engineer, Digital Engineering Belfast

EY UK is looking for a Junior Java Engineer in Belfast to join their expanding Digital Engineering team. This role involves coding new backend developments, quality assurance of program specifications, and collaborating with product teams to meet client needs. The ideal candidate will have at least 2 y ...

Java Automation Engineer | Agile, CI/CD

Kainos in Belfast is looking for a Test Automation Engineer (Associate) to be part of a dynamic team focused on delivering high-quality software. In this role, you will develop and execute automated tests, utilizing tools like Selenium and Postman, while collaborating in an agile environment. The ideal ...

Senior Java Engineer | Spring Boot & Cloud

Ocho is seeking a Senior Java Engineer to join their team in Belfast. The ideal candidate will have extensive experience in Java 11 and the Spring Boot ecosystem. Familiarity with containerization tools and cloud platforms like AWS and GCP is essential. This full-time role offers a competitive salary o ...

Backend Engineer, Developer Enablement (Java/Kotlin)

A global financial services firm in Belfast is seeking a server side engineer to join its Chief Technology Office. This role emphasizes driving solutions within projects like SDLC Automation and Release on Demand, enhancing productivity for 30k engineers. The ideal candidate will write quality code in Kotlin or ...

Senior Java Engineer Global FinTech, Hybrid

Citi is seeking a Senior Java Developer located in Belfast to help engineer the future of global finance. In this role, you will be responsible for developing and maintaining applications that influence economies globally, using advanced technologies and frameworks. The ideal candidate will possess str ...

Senior Java Backend Engineer Cloud Security

Join an innovative startup in the cloud security sector as a Java/Golang Engineer, where you'll develop groundbreaking products and tackle complex engineering challenges. With a dynamic and collaborative work environment, this is your chance to be part of a rapidly growing company that values creativity and inno ...

Senior Java Backend Engineer Remote Microservices

An innovative AI-driven recruitment company in the UK seeks a Software Engineer specializing in Java Backend. This position involves designing and operating scalable microservices while collaborating with a dynamic, global team. Candidates should hold an MSc in Computer Science and have over 3 years of software ...

Low Latency Java Backend Engineer – Trading

Core Java & Frameworks Strong Core Java and Spring Boot application development; experience with Java NIO (Channels, Buffers, Selectors) is expected. Low-Latency & Trading Systems Expert knowledge of FIX protocol, Market Connectivity, and low-latency programming. Messag ...

Principle Consultant Product Operating Model & Governance

Principal Consultant – Product Operating Model & Governance Location: Remote (UK-based) with occasional travel Type: Permanent or 12-month FTC About Amber Labs Amber Labs is a cutting-edge technology consultancy delivering innovative digit ...

Senior Java Developer

Senior Java Software Engineer - Spring Boot / Cloud / DevOps At a Glance Senior Java engineering role in a fast-moving, Agile delivery environment Spring Boot, AWS / OpenShift, Kubernetes - cloud-native and DevOps-focused Hybrid worki ...

Senior Java Developer

Senior Java Developer | Belfast | £65,000-£80,000Senior back-end developer role within a newly established Belfast trading technology hub Java-focused; real-time exchange connectivity, event-driven architecture, distributed systems Small founding team of 4 engineers; si ...

Staff Java Developer

Staff Java /C++ Engineer (Low Latency) / Belfast, Northern Ireland (New US FDI) Hybrid Salary: Up to £120K + benefits About the Company Our client is building a premier prediction market platform in partnership with two of the most respected names in financial services. Operating ...

Principal Java Developer

Principal Java Engineer - Microservices / Event-Driven ArchitectureAt a GlancePrincipal-level Java engineering role at a high-growth scaleup Event-driven microservices architecture - leading legacy monolith decomposition Flexible / hybrid working Salary: 75-85 ...

Senior Java Developer

Software Engineer Belfast Full-time Engineering The Opportunity Our client is one of the leading digital asset trading firms in the world, operating at the intersection of institutional finance and crypto markets. They've built a reputation over nearly a ...

Java Developer (AVP)

## Java Developer (AVP)Applyremote type: Hybridlocations: Belfast United Kingdomtime type: Full timeposted on: Posted Todayjob requisition id: **Discover your future at Citi**Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from a ...

Java Developer (AVP)

Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact. <h3 ...

Java Developer (AVP)

Job Overview Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping sh ...

Senior Java Developer

Join Kainos and Shape the Future At Kainos, we’re problem solvers, innovators, and collaborators—driven by a shared mission to create real impact. Whether we’re transforming digital services for millions, delivering cutting‑edge Workday solutions, or pushing the boundaries of technology, we do it ...

Contract Java Engineers

Contract Senior Java Engineer Overview Ocho is partnering with a global technology organisation to hire a Contract Senior Java Engineer to join a high-performing engineering team working on large-scale enterprise platforms within a real-time data environment. This is an opportun ...

Senior Java Developer

Senior Java Developer | Belfast | £65,000-£80,000 Senior back‑end developer role within a newly established Belfast trading technology hub. Small founding team of 4 engineers; site lead already in place (placed by Ocho). Ground‑floor opportunity to shape engineering culture and grow with the team ...

Backend Java Developer

Qualifications Experience with Java NIO components like Channels Buffers and Selectors is expected Expert knowledge of FIX protocol Market Connectivity and Low latency programming is a must Very strong in Java and Spring Boot based application development Experience with m ...

Java Developer (AVP)

**Discover your future at Citi** Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact. **Job Ov ...

Staff Java Developer

Staff Java / C++ Engineer (Low Latency) Belfast, Northern Ireland (Hybrid – onsite Tuesdays, Wednesdays, Thursdays) Salary: Up to £120K + benefits About the Company Our client is building a premier prediction market platform in partnership with two of the most respected ...

Senior Java Developer

2 days ago Be among the first 25 applicants MCS Group | Your Specialist Recruitment Consultancy provided pay range This range is provided by MCS Group | Your Specialist Recruitment Consultancy. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more ...

Senior Java SOR Engineer Low Latency Equities

Citibank (Switzerland) AG is seeking a Senior Java Developer for its Equities Electronic Trading team in Belfast. This role involves designing and optimizing a low-latency execution platform critical to electronic trading. The position requires expert-level knowledge in Core Java and experience with Smart Ord ...

Senior Java Engineer – Smart Order Router (SOR)

Citi is seeking a Senior Java Developer for their Equities Electronic Trading team, based in Belfast. This VP-level role focuses on designing and optimizing a core low-latency execution platform, using modern Java and microservices architecture. The ideal candidate will have a strong background in automated t ...

Cybersecurity Backend Engineer (Java/JS/Python) Cloud

MCS Group is seeking multiple Software Engineers to support a global technology organization's Cyber Security Engineering teams in Belfast. This opportunity involves designing and developing scalable backend services, APIs, and cloud-native applications in a collaborative environment. Candidates should have 3+ y ...

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