Top Software Engineer Jobs in Belfast

Responsibilities include building and maintaining backend services for distributed applications, requiring functional programming with Scala and TypeScript, alongside client interactions.

As a Software Engineer at Canonical, you will design, build, and ship software, improve packaging and distribution processes, and mentor colleagues while contributing to open source projects.

The Junior Ubuntu Software Engineer will design, build, and ship software, focusing on quality and resilience, while engaging with the open source community.

Lead design and delivery of core platform services (orders, baskets, checkout, promotions). Drive architecture, reliability, performance tuning, incident response, CI/CD and infrastructure improvements. Mentor engineers, coordinate cross-team initiatives, and contribute hands-on code to scalable, distributed microservices.

As a Software Engineer, you will design and develop applications, write clean code, engage in code reviews, optimize systems, and explore new technologies in a remote team.

We are seeking 2025 and 2026 Graduate Software Engineers to join Canonical's teams focused on open source software. Responsibilities include product roadmapping, coding in various languages, engaging with the community, and ensuring high-quality performance. Candidates should have an exceptional academic track record and experience with Linux.

As a Senior Software Engineer, you will build scalable distributed systems, improve developer experience, mentor peers, and lead incident responses.

Develop and maintain NedGraphics cloud collaboration platform and integrations. Build serverless AWS backends, secure REST APIs and event-driven workflows, optimize performance, enforce security best practices, implement automated tests, and produce technical documentation for third-party and internal integrations.

Develop and maintain NedGraphics cloud products and OptiNedLink, build serverless AWS backends, implement secure REST APIs and event-driven workflows, create integrations with third-party systems, optimize performance, enforce security best practices, and produce developer-facing documentation and automated tests.

Develop and maintain NedGraphics cloud platform (OptiNedLink). Build serverless AWS backends, secure/versioned REST APIs and event-driven workflows, integrate third-party/ERP/PLM systems, implement automated testing, optimize performance, enforce security best practices, and produce technical documentation.

Lead and own platform architecture across Infrahub ecosystem, implement high-impact architectural improvements, reduce technical debt, champion AI-first engineering, provide hands-on technical leadership, mentor engineers, and collaborate with product and leadership to ensure scalable, extensible systems.

Lead architecture and technical direction across the full stack, solve ambiguous cross-cutting problems, deploy LLM-powered features into production, improve reliability and scale, mentor engineers, and make strategic build/buy and platform decisions that shape long-term product delivery.

As a Senior Software Engineer, you will develop and maintain Alpaca's platform services, including event streaming infrastructure and authentication systems, while ensuring software quality and reliability.

The Senior Software Engineer ensures the reliability and performance of the Mural editor, collaborates on technical projects, and designs APIs for real-time collaboration. Responsibilities include product engineering, mentoring, and improving team processes while focusing on performance and developer experience.

Lead decomposition of a PHP monolith into Go microservices, design and operate scalable distributed systems (Kafka, Temporal, OpenSearch, Memgraph), integrate network telemetry and third-party APIs, maintain Terraform-managed cloud infrastructure, enforce SLAs/SLOs and CI/CD quality, mentor engineers, participate in on-call rotations, and drive platform architecture and reliability.

The Senior Software Engineer II will design and implement generative AI services, drive architectural standards, mentor engineers, and collaborate across teams to enhance data solutions.

Lead the Market Making Engineering team in developing real-time quoting systems, collaborate with stakeholders, and enhance software and processes.

Lead architecture and implementation of Chainguard Repository services: build and operate high-availability backend systems in Go, design package registries and APIs, drive scalability, reliability, observability, and mentor engineers while partnering across teams to expand artifact support.

Work as part of an agile team to design, develop, document and test frontend features for a mission-critical call-taking and dispatch platform. Build high-quality JavaScript/React/TypeScript user interfaces, collaborate with product and test engineers, follow modern development practices (SOLID, Git, pull requests), and support an expansion product while occasionally travelling to UK offices.

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.

Build and maintain internal Web Platform tooling and libraries used by M&S engineering teams. Own end-to-end platform features, improve CI/CD, monorepo health, testing, observability, and reliability. Mentor engineers, collaborate across teams, and operate platform services with a production-first mindset.

Lead the development of software solutions for a logistics platform, overseeing technical strategy, mentoring teams, and ensuring high-quality software delivery.

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.

Build and scale backend systems for a large social game. Design microservices and distributed systems, implement backend best practices, ensure reliability, security, and performance, collaborate cross-functionally, drive DevOps and testing, and continuously improve processes.

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.