Top Software Engineer Jobs in Belfast

As a Senior Software Engineer, you'll design, build, and scale the core systems and APIs of The Flex platform, focusing on automation, reliability, and performance.

Lead design and implementation of C++ software for secure embedded payment terminals, handling EMV/contactless/mobile transactions, cryptography and POS integrations. Drive full SDLC delivery, mentor engineers, improve CI/CD and tooling, troubleshoot embedded stacks, and collaborate with product and test teams to deliver production-grade solutions.

As a Staff Software Engineer, you will lead software development for payment solutions, enhance code quality, and ensure compliance standards.

Analyze and optimize ClickHouse database performance, develop performance tests, support engineering teams, collaborate with core teams, and engage with the open-source community.

Design, build, and maintain backend systems for products, focusing on APIs, data models, and distributed systems. Collaborate with teams to ensure system reliability and performance.

Lead the design and development of complex Rails features, mentor junior engineers, define technical direction, and ensure high-quality code while collaborating with stakeholders.

As a Senior Software Engineer, you'll design and implement features on the Merchantware Gateway, focusing on backend services, code quality, and team collaboration.

Seeking a Senior Software Engineer with expertise in Kotlin or Java to enhance developer platforms and internal tools at Citi's CTO organization, focusing on server-side engineering and modern databases.

Responsible for building scalable distributed systems, mentoring teammates, innovating on technical solutions, and improving team processes. Requires expertise in backend languages, especially Golang and Typescript.

The Senior Software Engineer will design high impact features, collaborate with teams, ensure maintainable systems, and write quality code.

Design, develop, and maintain front-end applications using Vue and TypeScript, collaborate with teams, and integrate emerging technologies.

The Back End Software Engineer will design and develop Azure SaaS applications, collaborate with teams, prototype solutions, and maintain application performance while resolving issues.

Join Grafana Labs as a Senior Software Engineer to build and maintain k6, a performance testing tool, collaborating with engineers on design and implementation.

As a Senior Software Engineer at Rewardful, you'll improve infrastructure, optimize performance, implement scalable solutions, and develop new features for our SaaS affiliate management platform.

As a Senior Software Engineer, you will design and maintain APIs, ensure Mural's editor is reliable and perform migrations and refactors, while also mentoring team members.

As a Software Development Engineer II, you will develop and maintain web services for navigation solutions, ensuring reliability and performance while collaborating with the team.

The role involves designing and implementing features, debugging, maintaining documentation, and collaborating with the community in the Mir graphics stack.

As a Software Engineer, you will build and develop the Mindly product, focusing on user needs, implementing reliable code, and collaborating with cross-functional teams.

As a Senior Software Engineer at KoBold, you'll develop innovative data systems for mineral exploration, collaborating closely with geologists and data scientists to improve exploration success rates. You'll own projects end-to-end, engage with users, and create scalable, production-quality solutions for complex geological challenges.

Design, build, and scale the core systems for VulnCheck's platform, participate in technical discussions, mentor junior engineers, and improve system reliability.

As a Senior Staff Software Engineer on the Platform Team, you'll design high-performance backend systems, mentor engineers, and drive architectural strategies to enhance Kraken's system reliability and scalability.

Seeking a Lead Software Engineer for a new squad focused on Personal Financial Management to guide teams and drive technical direction from discovery to delivery.

Develop and enhance MAAS core components, improve architecture, collaborate across teams, and ensure high standards in documentation and CI practices.

As a Senior Software Engineer at Westpac, you'll design and maintain Java-based solutions for fraud and financial crime platforms, collaborating with teams and mentoring junior engineers in an agile environment.

Design and build key features for an AI coding platform, focusing on user experience and product growth in a collaborative environment.