Top Software Engineer Jobs in Belfast

Build and scale Base360.ai: design APIs, services, and cloud-native infrastructure; implement event-driven automations, AI-powered workflows, and integrations (Airbnb, Stripe, Twilio, OpenAI). Own projects end-to-end to automate operations, improve pricing and guest experiences, and enable global scaling.

Full-stack developer working on Marex Prime Services: build and maintain secure, responsive front-to-back trading web applications using React and C#/.NET, automate CI/CD and cloud deployments (AWS), follow agile practices, partner with platform engineering and QA, adopt Agentic AI practices, and ensure regulatory compliance.

As a Senior iOS Engineer, you will lead engineering decisions, ship production code for the iOS app, and participate in product discussions to enhance the existing app architecture.

Develop and maintain high-volume exchange connectivity software, work within an agile team, write efficient code, and mentor team members.

Develop and enhance the ASPEN asset servicing application using Java, Angular, and Oracle. Analyze, test, debug, and secure applications, work in an agile global team, identify system improvements, and implement solutions under deadlines.

The role involves developing GPU Monitoring features and maintaining eBPF functionality, debugging production issues, and contributing to product architecture in Datadog's Agent over various Linux environments.

The role involves writing high-quality back-end code in Java or Kotlin, contributing to architectural decisions, and automating SDLC processes. You will lead a small team, apply AI in projects, and ensure clear communication across distributed teams.

Build and maintain Samsara's Cloud Governance Platform across AWS and GCP, focusing on cloud IAM guardrails, automated compliance controls, and software supply-chain security. Implement SAST/DAST and secure CI/CD patterns, design scalable, reliable systems, translate regulatory requirements into automated controls, collaborate cross-functionally, and own components end-to-end while mentoring teammates and shaping the roadmap.

The Senior Software Engineer will lead the development of backend systems for payment processing, collaborating with teams, setting goals, and fostering quality and ownership in code development.

The Senior Software Engineer II will enhance operational excellence by designing automated reliability systems, incident management tooling, and observability infrastructure while mentoring teams and implementing AI-driven solutions.

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.

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 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.

As a Software Engineer II, you will build and maintain features on Stora's Rails-based platform, improve app stability, and collaborate with a small team on various domains.

Build and architect Base360.ai: design and launch booking, pricing, payments, operations, and AI-powered automation. Integrate platforms (Airbnb, Stripe, Twilio, OpenAI), scale systems internationally, and embed AI workflows to automate operations and optimize revenue.

The Senior Software Engineer II on the Sustainability team develops scalable software solutions for vehicle telematics, focusing on efficiency and environmental benefits. Responsibilities include leading technical discussions, collaborating on design, shipping features, and maintaining production systems while promoting company values.

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.

Build and maintain integrations with third-party HRIS (e.g., ADP, Workday). Design and develop serverless, event-driven microservices (AWS SAM/Lambda, EventBridge, SNS). Own and enhance public REST APIs, OAuth flows, and webhooks. Translate product requirements into technical designs, sprint stories, and workstreams. Collaborate with Product and UX and champion SDLC and engineering best practices.

Join the Funeralcare team to design, build, maintain and support Co-op applications using Salesforce core platforms. Develop APIs and integrate data across the business, deliver iteratively with automated build/integration/deployment tooling, collaborate in engineering practices, share knowledge, and resolve technical challenges to meet business objectives.

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.