Top Software Engineer Jobs in Belfast

Develop and enhance dqlite, a distributed SQLite database, including debugging, implementing features, and engaging with the open source community.

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.

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.

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.

As a Software Engineer, you'll create and optimize workforce analytics platforms using JavaScript/TypeScript, AWS services, and data modeling, while collaborating in an agile team for customer-focused delivery.

The Staff Software Engineer will develop AI tools integrated with game engines and services, focusing on C++ and automation for game development.

As a Senior Software Engineer, you will design and manage international payment platforms, ensure engineering standards, mentor team members, and drive innovative practices in payments engineering.

As a Principal Software Engineer, you'll drive impactful projects in Engineering Productivity, solve complex technical problems, mentor team members, and enhance the quality of engineering practices within the organization.

Join the 3D graphics team at Mapbox, working on open source vector map rendering, graphics programming, and improving performance for location technologies.

As a Senior Software Engineer, you'll develop scalable full-stack solutions, mentor team members, and drive product improvements focused on reducing climate impact.

The Software Engineer will perform Unity game upgrades, resolve migration issues, support product teams, and improve internal tools for customer projects.