Top Software Engineer Jobs in Belfast

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 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.

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, implement, and scale robust Rust services and libraries for trading, payments, and crypto. Build low-latency distributed systems using RPC, Kafka, and event-driven patterns. Write testable, high-performance asynchronous network code, debug across OS/network/application stacks, own systems end-to-end, and mentor other engineers while collaborating with product teams.

Lead design, build, release, and maintain large-scale software solutions. Provide technical leadership, architecture, code review, mentorship, and operational stability. Drive CI/CD, DevOps practices, observability, and technical roadmap while collaborating with product and delivery teams.

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 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.

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

Design, implement, and maintain full-stack web features for a dairy farm management system. Own development lifecycle, ensure quality and reliability, support customers and technicians, and collaborate across cross-functional teams.

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.

Responsible for the technical deployment of the Guardian system, ensuring it meets requirements, integrating with client environments, and managing customer communications.

Build and deliver internal data tools and platforms, support ingestion systems and promote operational excellence in a collaborative environment.

The Embedded Software Quality Engineer ensures the quality of software in the embedded systems market. Responsibilities may include testing, debugging, and validating software solutions to maintain performance standards.

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.

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.

Optimize Ubuntu integration across latest IoT and server-class hardware, lead customer engagements, and work with open source communities in a remote, collaborative environment.

As a Software Support Engineer, you will troubleshoot and resolve complex issues related to Ubuntu and open source technologies, collaborate with teams, and contribute to community development.

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.

Lead prototyping and delivery of high-impact software solutions by researching and applying emerging technologies, building and maintaining modern applications, contributing to architecture and technical decisions, mentoring juniors, and communicating technical trade-offs to stakeholders.

As a Senior Blockchain Engineer, you will design and optimize smart contracts and blockchain infrastructure, collaborate with teams to ensure secure solutions, and lead development efforts in the DeFi ecosystem. You will analyze technologies, mentor staff, and enhance performance while maintaining security best practices.

The role involves designing, developing, and maintaining high-throughput systems for the billing platform, collaborating with teams, leading technical discussions, and mentoring other engineers.

The Sr. Software Engineer will develop public APIs, build integrations with HRIS, maintain platform services, and enhance code quality using Generative AI tools.

Develop and improve Firefox desktop features for installs, updates, and OS integration. Implement platform-specific enhancements (Windows/macOS), debug complex issues, participate in design and code reviews, collaborate with a distributed team, and use data to guide product decisions.

Lead design and operation of production-grade CI/CD and developer-facing delivery infrastructure. Contribute hands-on in Go and Python, improve pipeline reliability and speed, define paved paths and self-service Internal Developer Portal, champion progressive delivery (canaries, automated rollbacks), embed AI tooling into SDLC, and collaborate with cloud platform and engineering teams globally.