Top Software Engineer Jobs in Belfast

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.

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.

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.

As a Staff Software Engineer, you will lead the development of Apache Iceberg, enhancing data handling capabilities for large-scale systems, collaborating with teams, and architecting solutions for modern data lakes.

Lead design and implementation of high-performance agent runtimes, backend services, and self-hosted model/agent infrastructure. Build low-latency execution systems, real-time data pipelines, telemetry loops, CI/CD for zero-downtime deployments, and ensure fleet reliability on AWS/EKS.

Lead the architecture of Tide's agentic platform, ensuring reliable, scalable services. Collaborate across teams to design APIs and integration standards, focusing on developer experience and analytics.

The Staff Software Engineer will develop backend services for Tide's AI platform, integrate components, ensure reliability, and shape AI engineering patterns.

Lead the development of Runware's serverless platform by building core systems for AI workload management and providing technical guidance to the team.

The Senior Software Engineer will design and implement systems for AI integration, build scalable backend services, and mentor team members, ensuring high-quality systems that meet user needs.

This role offers graduates a chance to start their careers as Software Developers, focusing on building applications, enhancing skills, and gaining permanent placements post-training.

The Staff Software Engineer will design and manage end-to-end data pipelines, ensuring data quality and governance while collaborating across Java and Python systems, including event schema design and AI tooling.

Develop and enhance features for EnrollWise, contribute to a scalable software architecture, review code, collaborate on design and technical feasibility, and maintain software quality.

Build and launch backend features and services using Python/Flask and other technologies, own projects end-to-end, identify high-impact improvements, collaborate with product and design, ensure quality, testing, monitoring, and production reliability for services at scale.

As a Senior or Staff Software Engineer focused on SRE, you will optimize performance, manage infrastructure with code, drive observability, and collaborate with teams to enhance system reliability and efficiency.

Lead the development of backend platforms for national security and defence clients, leveraging cloud technologies and Agile methodologies, while ensuring operational responsibility for services and collaborating in cross-functional teams.

Design, develop, and maintain high-quality software for automated document-processing products. Collaborate with stakeholders to translate business needs into product improvements, contribute to architecture and technology decisions, conduct code reviews, optimize scalability and performance, lead major technical initiatives, mentor teammates, and improve engineering practices.

Design, implement, and maintain scalable server-side microservices for audio/video communication using Java and TypeScript. Lead CI/CD (Jenkins), collaborate with product and engineering teams, troubleshoot production issues, perform RCA/post-mortems, mentor developers, and drive architecture and reliability for WebRTC-based media backend services.

Lead the design and implementation of scalable, distributed systems, focusing on Reporting and Insights applications for clients. Guide software initiatives, mentor team members, and drive engineering best practices.

Develop and maintain automated test suites for a scientific software platform using Cypress, TypeScript, Cucumber, and Playwright. Own quality for an application module, design functional, regression, and integration tests, investigate defects, document bugs in JIRA, verify fixes, and maintain reliable CI test pipelines. Collaborate with developers, scientists, and DevOps engineers while performing manual exploratory testing and expanding API-level coverage.

Lead SRE/DevOps practitioner driving CI/CD, automated testing, containerization, dependency upgrades, secure deployments, observability, and resilient cross-datacenter topologies. Works hands-on with development teams to implement TDD, test data/masking, Renovate, Liquibase, Ansible, Docker/OpenShift, and build tooling to enable safe, rapid release cadence.

As a Principal Software Engineer, you'll lead backend and IoT engineering for Defence projects, ensuring high-quality software delivery while mentoring engineers and implementing robust CI/CD processes.

Lead the technical direction and hands-on development of Coder’s agentic engineering systems. Build production software in Go, with React and TypeScript as needed, and evolve agent execution, tool use, context management, streaming, and long-running workflows. Make architectural decisions, lead complex projects, improve reliability and performance, collaborate with Product and Design, and mentor engineers. The role requires distributed systems expertise, LLM and agentic workflow experience, and familiarity with AWS and cloud-native infrastructure.

Own and develop Unity’s Web runtime, optimizing build size, download, startup, and loading performance. Design and implement low-level improvements across C++, C#, JavaScript, WebAssembly, Emscripten, and LLVM, including multi-threading and progressive asset loading. Collaborate with platform teams, profile and debug across native and browser boundaries, mentor engineers, and establish code quality standards.

The Senior Staff Software Engineer will lead the architecture of the agentic platform, define shared service designs, partner with teams for reusable capabilities, provide technical leadership, and implement cost-management and evaluation pipelines.