Top Software Engineer Jobs in Belfast

Lead a small engineering team to deliver and operate large-scale Roblox game features. Drive technical planning, estimation, code quality, monitoring, releases, and mentorship while partnering cross-functionally to improve performance and player experience.

Join Uncountable's Implementations Engineering team to build software that integrates R&D lab instruments with their platform, working closely with customers and developing automated data pipelines.

Lead technical direction and modernisation of customer platform systems; design, build and operate mission-critical services; drive DevOps, observability, performance and security; mentor senior engineers; influence product and technology strategy; promote engineering excellence, automation, and open-source engagement.

Design, build, test, release and maintain scalable software and distributed systems. Provide technical leadership on complex projects, review code, influence architecture, optimise deployment pipelines and collaborate with stakeholders to deliver reliable solutions.

Lead technical direction for Customer Platform systems, design and deliver scalable cloud-native solutions, champion engineering best practices (clean code, DevOps, observability), mentor senior engineers, drive operational excellence, and influence product and technology strategy across multiple teams.

Design, build, release and maintain scalable software for distributed systems. Provide technical leadership, review code, contribute to architecture, optimise deployment pipelines, and collaborate with stakeholders to deliver high-impact solutions.

Develop and maintain contact-centre platform solutions, build and support integrations using APIs/middleware, apply CI/CD and automation, support production systems, drive continuous improvement, and mentor engineers.

Manage and scale Kubernetes clusters, automate infrastructure, optimize performance, maintain blockchain nodes, and improve system reliability while collaborating with product teams.

Design, build and optimise Python-based AI applications and data storage solutions. Collaborate with clients and teams, enforce code quality, CI/CD, testing practices, and deliver scalable production systems across cloud environments while travelling to client sites.

Develop reliable cloud services on the hyperscaler platform, contributing to cloud infrastructure, databases, and monitoring systems. Must write reliable code with team-oriented skills.

Build and own end-to-end cloud partner integrations: design architecture (auth, multi-tenancy, data movement), implement backend systems, run and be on-call for infrastructure/CI/deployments, work with external platforms and internal teams, and write design docs to set team technical direction.

As a Backend Software Engineer, you'll develop and maintain REST APIs using Django, manage cloud infrastructure, and oversee CI/CD pipelines to support consumer fintech applications.

As a Software Engineer, you will build and maintain financial platforms and applications that help homeowners track and manage their expenses, collaborate with the engineering team, and utilize AI for data insights.

Lead and technically own software products: design, build, test, and maintain scalable, secure C#/.NET applications. Provide technical leadership, architecture, estimation, CI/CD delivery, and coach/develop junior engineers while interacting with customers and mentoring the team.

Work with experienced engineers to develop and support live-service mobile game features. Fix bugs, write clean C# Unity code, collaborate with designers/QA, and learn using mentoring and AI-assisted tools.

Lead technical teams to design, build, test, and maintain modern, scalable, secure software. Provide technical ownership for product architecture, estimation, planning and requirements. Coach and develop junior staff, drive CI/CD practices, troubleshoot live applications, and liaise with customers as the teams technical leader.

Design, build, test and maintain modern software applications using Java and cloud platforms. Contribute to architecture and technical direction, apply security, scalability and performance best practices, mentor junior engineers, and collaborate on estimation, product planning and requirements.

The Software Test Engineer at Citi will focus on automation testing, creating test plans and cases, and ensuring quality through rigorous testing practices across applications.

Design, build, and ship production-ready software; decompose ambiguous problems into system architectures; modernise legacy systems and develop greenfield features; own technical decisions, testing, observability, and documentation; collaborate with product and design and ensure operational readiness.

Build and maintain scalable cloud-based data management and processing systems for biomedical research. Own platform components end-to-end, drive architecture and standards, improve CI/CD, observability, security, performance, mentor engineers, and participate in on-call incident response.

Design and evolve systems for Motion's infrastructure, focusing on reliable and secure operations across APIs, Linux systems, and cloud environments with a focus on hands-on coding and engineering judgment.

Lead technical strategy and delivery for Revenue Intelligence systems across web apps, backend APIs, event-driven services, data pipelines, analytical stores, and ML recommendation workflows. Improve reliability, security, scalability, and observability while remaining hands-on in design, implementation, incident response, and mentoring to raise organizational engineering effectiveness.

Lead cross-product engineering work: design APIs and data models, turn ambiguous customer problems into technical plans, implement and roll out features across web, APIs, CLI, integrations, and infra, debug production issues, and raise engineering quality through docs, reviews, and mentorship.

Lead technical strategy and delivery for Supply Chain & Logistics systems, designing and operating scalable, reliable warehouse software. Mentor engineers, promote engineering best practices, influence architecture and technology investment, and drive DevOps, observability and continuous improvement across platforms.

Lead design and delivery of scalable, resilient backend systems and integrations. Provide technical leadership, conduct code reviews, ensure automated testing and observability, mentor engineers, collaborate with stakeholders, and drive operational excellence for cloud-native applications.