Top Software Engineer Jobs in Belfast

Provide technical leadership across multiple teams by shaping technical strategy, designing scalable distributed backend architectures, guiding architectural decisions, mentoring senior engineers, and improving reliability, observability, testing, and operational excellence. Partner with Product and Operations and contribute hands-on to critical systems powering millions of payment transactions.

Join an early engineering pod to own end-to-end delivery of EDUKATE.ai features. Work full-stack, collaborate with stakeholders, use AI-assisted development, uphold TDD and code-review standards, coach teammates, and help shape engineering practices and product outcomes.

Lead technical direction for a multi-ecosystem libraries platform: design ecosystem-agnostic indexing, build orchestration, and remediation automation from CVE detection to verified release. Drive AI/agentic patching strategy, mentor senior engineers, define SLOs, own reliability and incidents, and onboard .NET, Go, and Rust ecosystems while partnering across org teams.

Design, build, test, deploy and operate backend services for the Contact Centre. Integrate CCaaS platforms (Zendesk, Twilio, Azure/GCP), design APIs and event-driven solutions, and deliver customer self-service/FAQ capabilities while collaborating with product, data, security and customer stakeholders.

Lead backend-focused engineering for Contact Centre platforms, designing and operating secure, scalable services and integrations (Zendesk, Twilio, Azure/Google). Provide technical direction, write production-quality Java code, define APIs and event-driven workflows, and collaborate with Product, Data, Security and Customer Service to deliver reliable customer and colleague experiences.

Lead backend engineering for Contact Centre technology, designing, building and operating secure, resilient services and integrations (Zendesk, Twilio, Azure, Google). Provide technical direction across teams, implement APIs, event-driven workflows, and responsible AI automation while staying hands-on with production-quality Java code.

Backend-focused senior engineer to design, build and operate Contact Centre services. Build APIs and event-driven integrations with CCaaS platforms (Zendesk, Twilio), develop self-service/FAQ solutions, and ensure CI/CD, testing and live operation.

Lead and own platform architecture across Infrahub ecosystem, implement high-impact architectural improvements, reduce technical debt, champion AI-first engineering, provide hands-on technical leadership, mentor engineers, and collaborate with product and leadership to ensure scalable, extensible systems.

As a Senior Software Engineer, you will develop and maintain Alpaca's platform services, including event streaming infrastructure and authentication systems, while ensuring software quality and reliability.

Lead the development of software solutions for a logistics platform, overseeing technical strategy, mentoring teams, and ensuring high-quality software delivery.

Lead architecture and technical direction across the full stack, solve ambiguous cross-cutting problems, deploy LLM-powered features into production, improve reliability and scale, mentor engineers, and make strategic build/buy and platform decisions that shape long-term product delivery.

Lead decomposition of a PHP monolith into Go microservices, design and operate scalable distributed systems (Kafka, Temporal, OpenSearch, Memgraph), integrate network telemetry and third-party APIs, maintain Terraform-managed cloud infrastructure, enforce SLAs/SLOs and CI/CD quality, mentor engineers, participate in on-call rotations, and drive platform architecture and reliability.

The Senior Software Engineer ensures the reliability and performance of the Mural editor, collaborates on technical projects, and designs APIs for real-time collaboration. Responsibilities include product engineering, mentoring, and improving team processes while focusing on performance and developer experience.

Lead the Market Making Engineering team in developing real-time quoting systems, collaborate with stakeholders, and enhance software and processes.

Lead architecture and implementation of Chainguard Repository services: build and operate high-availability backend systems in Go, design package registries and APIs, drive scalability, reliability, observability, and mentor engineers while partnering across teams to expand artifact support.

The role involves designing and maintaining scalable software platforms, troubleshooting complex problems, mentoring engineers, and establishing best practices to ensure software integrity.

Design and build the Capacity and Quota Management control plane for GPU resource allocation. Implement reservation engines, quota control algorithms, APIs, rebalancing, and auto-reclamation; ensure consistency, reliability, and scalable distributed backend services.

Lead end-to-end design and implementation of Diagnostics backend: high-throughput Go services, ingestion and OpenTelemetry pipelines, ClickHouse-based storage and queries, and dashboard surfaces. Collaborate cross-team, mentor engineers, raise code-review and AI-agent workflow standards, and ensure reliability, performance, and secure data handling.

Build and scale backend systems for a large social game. Design microservices and distributed systems, implement backend best practices, ensure reliability, security, and performance, collaborate cross-functionally, drive DevOps and testing, and continuously improve processes.

Lead a small engineering team to deliver and operate large-scale Roblox game features. Drive technical planning, estimation, code quality, monitoring, releases, and mentorship while partnering cross-functionally to improve performance and player experience.

Lead technical direction and modernisation of customer platform systems; design, build and operate mission-critical services; drive DevOps, observability, performance and security; mentor senior engineers; influence product and technology strategy; promote engineering excellence, automation, and open-source engagement.

Design, build, test, release and maintain scalable software and distributed systems. Provide technical leadership on complex projects, review code, influence architecture, optimise deployment pipelines and collaborate with stakeholders to deliver reliable solutions.

Lead technical direction for Customer Platform systems, design and deliver scalable cloud-native solutions, champion engineering best practices (clean code, DevOps, observability), mentor senior engineers, drive operational excellence, and influence product and technology strategy across multiple teams.

Design, build, release and maintain scalable software for distributed systems. Provide technical leadership, review code, contribute to architecture, optimise deployment pipelines, and collaborate with stakeholders to deliver high-impact solutions.

Manage and scale Kubernetes clusters, automate infrastructure, optimize performance, maintain blockchain nodes, and improve system reliability while collaborating with product teams.