Top Tech Jobs & Startup Jobs in Belfast

Coordinates Professional Services operations across the UK and Ireland, maintaining project portfolios, forecasts, billing, revenue, utilization, capacity, margins, backlog, dashboards, and KPI reporting. Supports Sales-to-Services handoffs, PMO governance, risk escalation, leadership reporting, and cross-functional collaboration with project management, sales, finance, billing, and resource teams. The role also improves processes, data quality, and reporting efficiency.

Defines Rapid7’s technical vision and architecture for LLM and agentic AI systems across security products. Leads model strategy, fine-tuning, post-training, inference optimization, evaluation standards, and high-risk initiatives. Builds critical training and inference code, resolves complex technical trade-offs, mentors senior engineers, and influences product and platform strategy. The role requires deep expertise in transformer-based models, PyTorch, distributed training, context engineering, model evaluation, scalable inference, classical ML, and production AI systems.

Monitors and triages alerts, conducts open-source research, identifies online threats and exposed personal information, coordinates PII removal, documents findings, and prepares risk assessment reports. The role also involves social media monitoring, client updates, escalation of complex issues, and applying cybersecurity, privacy, and intelligence principles while working onsite with the Belfast intelligence team.

Supports the planning, development, and improvement of aerospace manufacturing processes, tools, technologies, and production systems. Responsibilities include continuous improvement, waste reduction, automation and digital manufacturing initiatives, industrialisation of new products, production problem-solving, data analysis, and cross-functional collaboration with engineering, quality, operations, supply chain, and production teams.

Own the product strategy and roadmap for Apex’s API gateway and observability platforms. Define capabilities such as traffic management, rate limiting, logging, metrics, traces, alerting, dashboards, and reporting. Partner with engineering teams to prioritize work, manage technical and commercial tradeoffs, define measurable outcomes, write requirements and strategy documents, maintain the Jira backlog, and communicate progress to technical and executive stakeholders.

Develop and maintain production software for large-scale, real-time advertising systems. Responsibilities include writing tested code, addressing features and bugs, supporting production services, collaborating across teams, and contributing to system architecture and design. The role emphasizes systems programming, scalability, low-latency performance, concurrency, memory management, and reliable enterprise server applications, with opportunities to develop production Rust skills.

As a Senior Site Reliability Engineer, you'll build resilient platforms, automate processes, mentor teams, and drive changes in a cloud-based environment.

Provides strategic and operational HR support to a Finance and Projects Practice Group. Advises partners, managers, and senior stakeholders; manages employee relations, performance, talent, recruitment support, reporting, HR data analysis, and employee lifecycle administration. Partners with specialist HR teams on onboarding, reward, learning, and development while delivering people plans and maintaining strong stakeholder relationships.

Design, develop, test, and implement Python backend services, ETL pipelines, and batch or real-time processing components for an enterprise reference data platform. Architect and optimize Oracle databases, SQL queries, and PL/SQL packages while improving performance, scalability, and reliability. Integrate master reference data, support CI/CD and automated testing, troubleshoot production issues, and ensure governance compliance. Collaborate with business and technology teams, participate in Agile delivery, and mentor junior developers.

Designs and optimizes CI/CD pipelines, containerized platforms, cloud infrastructure, and observability systems. Manages Kubernetes and OpenShift workloads, develops Helm charts, supports Linux automation, and improves production reliability through monitoring, SLOs, and SLIs. Collaborates with engineering and business stakeholders, enforces delivery security standards, resolves complex technical issues, and mentors junior and mid-level engineers.

Provides production application support for Citi’s Prime Finance platforms, including Prime Brokerage and Securities Lending systems. Responsibilities include incident resolution, user support, monitoring, ticket management, system onboarding, stability projects, change management, automation, service analysis, and proactive resilience improvements. The role requires collaboration with global teams, developers, business analysts, and financial-services stakeholders, with shift coverage and an on-call weekend rotation.

The Resourcing Specialist manages end-to-end recruitment, talent pipelines, candidate assessment, interviews, offers, onboarding, and workforce administration for skilled operatives across the UK and Ireland. The role also maintains workforce dashboards, reporting, compliance training records, and workforce planning insights. It partners with operational leaders, HR, Learning and Development, marketing, agencies, and external partners to support recruitment campaigns, continuous improvement, employee communications, and internal mobility. Regular travel to recruitment events and operational meetings is required.