Top Software Engineer Jobs in Belfast

Lead technical teams to design, build, test, and maintain modern, scalable software. Provide architecture and product ownership, mentor and coach junior engineers, drive CI/CD practices, and collaborate with customers to deliver high-quality solutions.

Design and implement a distributed control plane for Confluent Cloud offerings, utilizing Kubernetes and various programming languages, while supporting the product lifecycle.

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

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.

Implement and maintain WebExtensions APIs and addon management in Firefox, debug extension issues, build related UI, collaborate across teams, contribute to Mozilla-owned add-ons, support extension developers, and participate in open-source workflows (code reviews, Bugzilla/GitHub).

The Software Engineer will design, develop, and support the MEMX Trading system software, focusing on production support during US evening hours.

Lead architecture and strategy for Athena: build production-grade distributed systems that validate, deduplicate, and route vulnerability data; move prototypes to reliable, observable pipelines; set technical standards, scale the team, and partner on product and operational decisions.

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.

Lead design and development of scalable full‑stack solutions for Warehouse Continuity in Supply Chain. Provide technical leadership, architecture, code reviews, mentorship, DevSecOps adoption, observability, and modernisation of integrations and legacy systems while collaborating with product and business stakeholders to ensure performance, security, and operational excellence.

Lead design and development of scalable full‑stack systems and integrations for supply chain/transport. Provide technical leadership, code review, mentorship, DevSecOps implementation, observability, and stakeholder collaboration to ensure robust, secure, and performant solutions.

Design and develop server-side payment processing gateway products, lead technical work and mentor teams, improve development processes, collaborate across lifecycle from requirements to production, and assist deployments while ensuring high-quality, testable solutions.

Design and implement backend services for a high-throughput payments platform. Contribute to architecture and roadmap features, ensure code quality and test automation, support CI/CD and deployments, investigate production issues, mentor junior engineers, and collaborate in Agile teams to deliver scalable, reliable payment services.

Design, build and maintain automated test frameworks for multi-cloud (AWS/GCP) enterprise products. Develop and run API, backend and frontend automation, create mock servers, integrate tests into CI/CD, troubleshoot automation jobs, estimate test effort, and own QA sign-off and release coordination.

Lead backend platform development for National Security clients using cloud technologies, ensuring operational responsibility and agile practices.

Responsible for building and maintaining Android applications with AI features. Focus on performance, UX design, and collaboration with backend and ML engineers.

As an iOS Developer, you will build and maintain AI-powered iOS applications focusing on performance, reliability, and user trust. Collaborate with engineers to integrate AI features, design UX patterns, and optimize app performance.

The Software Engineer will develop and maintain cross-platform desktop applications, focusing on performance, reliability, and integration of AI features. Responsibilities include optimizing applications, managing local data, and ensuring stability on macOS and Windows.

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 Modeling Platform team, setting technical strategy and overseeing the evolution of a scalable distributed computation architecture while mentoring engineers and enhancing team capabilities.

The Senior Embedded Software Engineer designs, develops, and maintains embedded software for various hardware platforms, ensuring integration and reliability while leading software architecture efforts and mentoring junior engineers.

Develop and maintain embedded software solutions, debug firmware, provide technical documentation, and collaborate with teams on projects.

As a Senior Software Engineer, you'll maintain critical data framework integrations, ensuring performance and reliability while collaborating with the community, affecting real-time analytics and observability systems.

The Senior Software Engineer will drive the technical vision, manage large datasets, ensure code quality, and lead development initiatives in a remote-first environment.

Own and drive architecture for a major backend domain in Chainguard's clearing house. Build production-ready Go services on GCP with Terraform, design data pipelines to ingest and deduplicate unstructured vulnerability reports, establish engineering best practices, and collaborate on interfaces, observability, and roadmap planning.

Own and build core backend components in Go on GCP, including customer onboarding, entitlement logic, and data ingestion pipelines. Drive ambiguous features from design to production with testing and observability, participate in on-call rotations, lead multi-engineer efforts, review code, and contribute Terraform and GCP operational tooling.