Top Software Engineer Jobs in Belfast

Develop, test, implement, analyze, and maintain IBM mainframe applications using COBOL, CICS, and DB2. The role provides technical domain expertise, resolves incidents and operational problems, performs root cause analysis, supports after-hours operations, assesses risks, and mentors team members. Candidates need strong mainframe experience, communication, quality-process, Agile, and problem-solving skills.

Design and build extensible Dynamics 365 solutions: develop plug-ins, custom workflow assemblies and actions; implement integrations and concurrency handling; integrate Power Platform and Power BI; profile performance using Application Insights; and support CI/CD with Azure DevOps.

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.

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.

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.

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.

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.

Build, ship, and operate Cloudbeds' POS: work across React Native/Expo frontend, Python/FastAPI backend, PostgreSQL, synchronization/offline patterns, and cloud-native infrastructure (Terraform, Kubernetes, Argo CD). Own API design, reliability, testing, observability, production support, and cross-team collaboration to deliver dependable, scalable POS experiences for hospitality.

Lead technical direction and modernise international commerce platforms. Design scalable integrations for product, pricing, fulfilment, partner/marketplace flows. Promote engineering excellence, DevOps ownership, observability, and mentor teams while aligning technology strategy with business goals.

As a Staff Software Engineer, you will develop robust software solutions, provide technical leadership, mentor engineers, and innovate within the commercial trading domain.

The role involves architecting AI solutions for compliance, ensuring regulatory adherence, automating processes, and enhancing team capabilities through technology and training.

The Sr. Software Engineer (FE) will lead the development of scalable frontend applications using React. Responsibilities include systems design, testing strategy, performance optimization, AI integration, and mentoring.

Own and deliver frontend trading features across web, mobile, and browser extension platforms. Lead new blockchain integrations and product initiatives, collaborate with product, design and trading teams, interface with users and developers, and help grow the engineering team and culture.

The Senior Software Engineer will develop features for Phantom's web platforms, lead new product initiatives, interface with users, and contribute to team culture.

Design, deploy, and maintain scalable cloud infrastructure for ClickHouse. Collaborate with teams to enhance performance, reliability, and security of services.

Design, build, and maintain scalable backend systems and APIs using Go/Python. Integrate enterprise services, data pipelines, event-driven tech (Temporal, Kafka), and LLMs (OpenAI, Gemini, Claude). Ensure security, high availability, multi-tenant SaaS deployments, and improve engineering practices across the stack.

Develop microservices and cloud services for Magnify's platform, collaborate with data science, and lead complex software projects in a startup environment.

Design, develop, and deliver back-end, distributed, real-time systems using .NET/C#. Own feature delivery throughout the SDLC, champion engineering best practices, collaborate with QA and architects, use CI/CD and cloud (AWS), mentor junior engineers, and evaluate technologies including AI-enabled tools to ensure scalable, resilient production systems.

Lead technical teams to design, build, test and maintain modern, scalable software. Provide technical ownership (architecture, estimation, planning), coach and develop junior staff, ensure CI/CD and testing practices (e.g., TDD/XP), and liaise with customers.

The Senior Software Engineer will enhance Speechify's product experience by building foundational services, collaborating with product teams, optimizing functionality, and developing backend services using Kotlin.

The Software Engineer will focus on AI-native engineering practices, build innovative interfaces for software delivery, ensure system reliability, and have a strong backend expertise, particularly in Go, with a production mindset.

As a Software Engineer at Euphoric, you'll develop AI-driven features, collaborate across the tech stack, maintain quality code, and contribute to an innovative benefits platform.

Design, develop, and maintain components of the LNIP intelligence core platform, including a semantic search API and internal data curation tool. Implement secure coding standards, unit testing, code reviews, and cloud deployments. Use agentic development tools responsibly and work with complex data models, vector embeddings, SQL and PySpark to support intelligent software systems.

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

Lead hands-on software engineering for Medserv’s healthcare billing and practice management platform. Design and build reliable production systems, APIs, data models, and service boundaries; modernize legacy systems; improve testing, security, observability, and reliability; review critical code; mentor engineers; and influence architecture and technical standards across the platform.