Top Software Engineer Jobs in Belfast

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

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.

As a Software Engineer, you will resolve complex customer issues related to Ubuntu and open source software, participate in upstream communities, and develop and review code across multiple layers of the software stack.

Lead design and development of Windows desktop applications. Ensure performance, maintainability, and accessibility, while driving feature lifecycle and collaborating cross-functionally.

Lead the design and implementation of core authentication infrastructure at Phantom, focusing on secure authentication systems, secrets management, and API integrations.

As a Software Engineer, you'll develop trading APIs and systems, enhance user experiences, and lead initiatives for blockchain support and new products.

Senior full‑stack engineer responsible for designing and delivering scalable, cloud‑native applications using Java or Python. Solve complex business problems, set coding standards, mentor mid‑level developers, integrate Gen‑AI capabilities (LLMs, prompt engineering, vector search) and third‑party Gen‑AI APIs, and collaborate with management to deploy new products while ensuring compliance and risk controls.

Senior Software Engineer will be a founding member of a Learner Experience pod owning end-to-end delivery: discovery, solution design, production, iteration and outcome measurement. Work across full stack with strong front-end/UX focus, use AI-assisted development, uphold TDD and code review standards, coach peers, and collaborate closely with non-technical stakeholders to shape impactful edtech features.

Lead design and delivery of order management and promising services: build resilient APIs and integrations, own features end-to-end, improve observability and operational excellence, mentor engineers, and shape technical direction to enable accurate delivery promises and scalable fulfilment.

Design, build, and operate backend platform capabilities for content and media: federated GraphQL, event-driven pipelines, APIs, automation, and developer/editor tooling. Lead architecture, deliver production-quality code, and enable teams via scalable, reliable services.

The Staff Software Engineer will design and build backend platforms for content and media, develop APIs, lead architecture design, and act as a technical authority.

The Staff Software Engineer will lead the design and delivery of robust order management solutions, ensuring reliability and scalability, while mentoring junior engineers and collaborating across teams.

Develop and maintain the macOS endpoint client for an endpoint security product. Design features, shape architecture, review code (including agentic AI-generated code), improve build/deploy/test automation, resolve customer issues, and track macOS/security technologies while mentoring peers and owning product areas.

Lead Bloomreach Professional Services integrations: design and implement solutions using Java and modern frontend frameworks, validate scope, assess technical risks, make architectural decisions, improve DXP add-ons and documentation, coach peers, and occasionally travel to EMEA clients.

Join a cross-functional agile team to design, build and test full-stack solutions using React, Node.js, Java/REST APIs and cloud platforms. Provide technical leadership, mentor engineers, solve complex problems, collaborate with product/QA/design, and promote engineering best practices while staying current with emerging technologies.

Lead design and implement new Elasticsearch search features, improve relevance and vector search (HNSW/IVF), fix bugs, collaborate across a distributed team, contribute to Lucene, and write idiomatic modern Java.

Design and develop software solutions from scratch, collaborating on government projects, and participating in the software development lifecycle.

Build and operate a managed PostgreSQL service for AI workloads: develop control plane and lifecycle automation in Go, tune PostgreSQL internals and ecosystem tooling, create migration tooling, integrate vector search, run SRE practices (SLOs, observability, incident response), and work directly with customers on architecture and escalations.

Lead backend and edge/IoT engineering, implementing scalable solutions and mentoring team members while collaborating with Data Science teams.

Design, implement, and maintain scalable Java-based software solutions. Collaborate across the SDLC with stakeholders and development teams, integrate DevOps and CI/CD practices, support operational tasks, ensure security and performance, drive feature development, conduct code reviews, and stay current with emerging technologies.

Lead Systems Engineer responsible for designing, implementing, and maintaining PLC/SCADA automation systems, industrial networks, and OT cybersecurity. Provides technical leadership, mentors teams, oversees system architecture, commissioning, risk assessments, and vendor/client coordination to deliver secure, standards-compliant projects on time and within budget.

Work on an agile team building and maintaining mission-critical call-taking and dispatch software. Develop, document, and test features across frontend and backend using modern practices, collaborate with product and test engineers, and lead development for expansion products. Obtain required UK security vetting.

Lead and grow an SDET team building reliable, scalable cloud storage solutions. Provide technical leadership, design and review architectures, plan sprints, implement deterministic functional and non-functional test suites in CI/CD/CT pipelines, collaborate on product specs, hire and mentor engineers, and continuously improve processes and systems.

Owner of the asset discovery experience across tokens, perpetuals, and prediction markets. Design, build, and scale features for web, mobile, and browser extension platforms. Lead initiatives to add blockchain support and new products, interface with users and developers for feedback, and help grow and hire a high-performing Discovery team.