Top Software Engineer Jobs in Belfast

As a Backend Engineer, you will build and maintain backend services, write maintainable code, review peers' work, and learn from experienced engineers while leveraging AI tools.

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.

Design, implement, and maintain scalable Java-based software solutions. Collaborate across the SDLC, drive feature development, conduct code reviews, support CI/CD and DevOps practices, and ensure system performance, security, and reliability.

Analyze and optimize ClickHouse database performance, develop performance tests, support engineering teams, collaborate with core teams, and engage with the open-source community.

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.

Lead architecture and multi-quarter initiatives for Tempo, Grafana's distributed tracing backend. Own ingestion, storage, query, APIs, and operational SLOs; mentor engineers, participate in on-call, collaborate with product and sibling teams, and contribute to the open-source project to improve performance, scalability, and AI/agent-friendly interfaces.

Lead the design and development of complex Rails features, mentor junior engineers, define technical direction, and ensure high-quality code while collaborating with stakeholders.

Develop and test control-system software for advanced vehicles across the product lifecycle. Design, verify and validate control architectures, collaborate with teams and suppliers, and support structured engineering and quality-driven processes to deliver safe, reliable vehicle control systems.

The Senior Software Engineer will lead the design and management of cloud infrastructure, automate systems, ensure security, and enhance developer experience while mentoring the team.

Build and scale core observability services for high-volume telemetry ingestion, distributed storage, query engines, alerting pipelines, and AI-assisted troubleshooting. Work on reliability, performance, and production incident resolution across a cloud AI platform.

Join Reedsy to develop and improve a collaborative word processor, adding features and ensuring performance and security for users.

Design and maintain Golang infrastructure services for the Confluent Cloud Platform, ensuring performance, availability, and capacity planning of the service.

Work hands-on in a large, mature C++ (Windows/MFC) codebase to own and modernize features and subsystems, refactor legacy components, optimize performance-sensitive spectral algorithms, and collaborate with engineers and domain experts to ensure correctness, maintainability, and backward compatibility.

Lead development of ClickHouse's Python connector and SDKs, build integrations with orchestration and transformation tools, drive AI/LLM integration strategy for production data workflows, engage with open-source community, and collaborate across product and platform teams to deliver enterprise-grade data integrations.

The Senior Software Engineer will architect and develop the Solver network, ensuring performance, collaborating with teams, and leading engineering standards.

Develop and maintain the backend ecosystem for the Alta Video Management System, focusing on cloud-based distributed systems and coding quality.

The Software Engineer will develop the backend for a cloud-based video management system, focusing on system design, feature development, and enhancing existing capabilities.

As a Software Engineer at Texas Sports Academy, you will design and ship AI-driven software features across various systems while collaborating directly with founders.

The Software Engineer will shape AI governance in developer tooling, build product features, collaborate with teams, support users, and innovate rapidly.

As a Software Engineer - L3 Support, you will resolve complex Ubuntu-related issues, collaborate with teams, and participate in upstream communities to drive bug fixes and improvements.