Top Software Engineer Jobs in Belfast

Lead design and delivery of scalable, secure payment platform capabilities across stores and digital channels. Own end-to-end payment product outcomes, ensure reliability, security and performance, implement SRE/DevOps and CI/CD practices, drive observability and incident management, shape architecture, mentor engineers and promote engineering excellence.

Design, build, and evolve scalable backend microservices and APIs to support the full customer order lifecycle. Implement event-driven workflows (Kafka), GraphQL/REST APIs, and resilient low-latency solutions using distributed databases and caching, collaborating with product, architects, and stakeholders to enable high-volume transactional commerce systems.

Lead quality engineering for POS and Self-Checkout platforms: define quality strategy, build scalable test automation, drive CI/CD and observability, mentor engineers, support production releases and incident investigations to improve platform reliability and performance.

Design, build, and maintain high-volume, resilient payment services and APIs. Own end-to-end features from design through production support, drive observability and CI/CD practices, and modernize platform scalability, security, and reliability to support millions of customer transactions.

Design, build, and operate secure, scalable authentication, authorization, and identity services. Own features end-to-end from design through production support, champion engineering best practices, and collaborate on platform direction to support millions of customers and internal teams.

Lead design and delivery of scalable, secure payment platform capabilities. Own reliability, performance and resilience, drive DevOps/CI-CD, observability and incident management, and mentor engineers to improve platform engineering practices.

Design, build, and operate scalable, resilient backend services and APIs for the full customer order lifecycle. Implement microservices, event-driven Kafka workflows, GraphQL/REST APIs, and low-latency solutions using distributed databases and caching. Collaborate with product, architecture, and business stakeholders to solve high-volume transactional commerce challenges.

Design, build, and operate secure, scalable authentication and identity services. Own features end-to-end including design, development, testing, deployment, monitoring, and support. Develop resilient APIs and backend services, shape platform technical direction, and champion engineering best practices across teams.

Design, build, and operate scalable Order Management capabilities for checkout, fulfilment, returns, amendments, and cancellations. Own end-to-end features, shape platform architecture, improve integrations and automation, and drive observability, resilience, and operational excellence in a high-volume retail environment.

Design, build, and operate scalable backend microservices and APIs for pricing and promotions. Implement Kafka-based event-driven architectures, GraphQL/REST APIs, and resilient low-latency solutions using MongoDB, Redis, and PostgreSQL. Own features from design through deployment and production support.

Design, build, and operate scalable, resilient payment services and APIs for high-volume ecommerce. Own end-to-end features, improve observability and reliability, champion engineering best practices, and support production systems.

Build and evolve Python-based AI services powering personalised recommendation and conversational experiences. Design and implement evaluation frameworks (including LLM-based evaluation), run experiments and data-driven improvements, integrate AI services with APIs, and improve relevance, consistency, and customer outcomes at scale.

Lead QA for retail platforms (POS, Self-Checkout), shape quality strategy, build scalable test automation, drive operational excellence, mentor engineers, support CI/CD and production releases.

Design, build, and own end-to-end order management capabilities for checkout, fulfilment, returns, amendments, and cancellations. Drive platform architecture, integrations, CI/CD, observability, resilience, and operational excellence. Mentor engineers, collaborate with product and fulfilment stakeholders, and continuously improve engineering standards and tooling.

Lead and execute manual and automated testing for web, API, desktop, and mobile products. Build and maintain automated test suites, create test plans and cases, document and track defects, collaborate with Agile teams, improve testing processes and frameworks, and mentor junior QA engineers.

Develop and optimize performance-critical components of a low-latency trading platform (pricing engines, gateways, market-data, messaging). Own design, deployment, production support, observability, and architectural decisions. Mentor engineers, conduct reviews, and ensure reliability in cloud-native AWS and colocated environments.

Build and maintain low-latency trading infrastructure on Linux using modern C++ and Go. Work on pricing engines, connectivity, market-data pipelines, FIX integrations, messaging, observability, and production support. Own design, deployment, incident response, and continuous performance optimization.

Design, build, and operate scalable web applications, APIs, services, and AI-enabled workflows. Use AI tools across the development lifecycle, ensure reliability, performance, and observability, contribute to technical decisions, iterate from user feedback, and own production quality and delivery as part of cross-functional squads.

Senior Software Engineer on the Customer Analytics Engineering team building scalable backend services in Java (JDK11+). Design, develop, and maintain analytics platform features, optimize SQL for MySQL and Snowflake, troubleshoot production issues, improve architecture and performance, participate in code reviews, mentor teammates, and drive modernization and technical debt reduction.

Senior frontend engineer responsible for designing, building and evolving accessible, performant, maintainable UIs using React and TypeScript. Drive frontend architecture, integrate frontends with APIs and backend services, apply frontend testing and CI/CD practices, contribute to component libraries/design systems, mentor peers, and uplift engineering standards across delivery teams.

The Solutions Engineer will support the integration of Near Intents, assist developers, enhance product stability, and provide technical support to ecosystem partners.

Design, build and support scalable Salesforce Loyalty Cloud solutions. Lead development of member lifecycle, promotions, rewards processing and personalized experiences. Implement integrations using REST APIs and Platform Events. Collaborate with architects and product teams, drive code quality, observability, CI/CD and best engineering practices to ensure secure, reliable production systems.

Design, build and maintain scalable Salesforce Loyalty Cloud solutions. Lead development of member lifecycle, promotions, rewards processing and personalised experiences. Implement integrations via REST APIs and Platform Events. Collaborate with architects and product teams, champion code quality, observability, CI/CD and engineering best practices within Agile, cross-functional teams.

Lead technical direction and modernise international commerce platforms. Design scalable integrations for product, pricing, fulfilment, marketplace and partner flows. Champion engineering excellence, DevOps practices, reliability, observability and run-first ownership. Mentor engineers, align multi-team delivery and shape technology strategy to support international growth.

Build and maintain Web Platform tooling used by internal engineering teams: shared libraries, pipelines, testing patterns, and documentation. Own end-to-end platform work, improve CI/CD, monorepo health, observability, and reliability. Mentor engineers, provide operational support, and collaborate across teams to boost developer productivity and quality.