Top Tech Jobs & Startup Jobs in Belfast

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.

Provide end-to-end production application support, including incident response, escalation management, monitoring, access and configuration changes, and client communication. Use AI tooling to investigate issues, build automations, and validate outputs. Collaborate with engineering on fixes, mentor teammates, and maintain runbooks and knowledge articles. The role requires strong skills in cloud platforms, APIs, databases, networking, operating systems, scripting, troubleshooting, and customer communication, with participation in an on-call rotation.

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.

Owns the administration, configuration, optimization, and integration of the company’s incentive compensation platform. Translates compensation plans into auditable system logic, manages crediting rules and payouts, develops reporting, troubleshoots data and calculation issues, and supports monthly accounting close. Partners with Sales Operations, IT, FP&A, Payroll, and HR while administering access controls under ITGC and SOX requirements. The role also contributes to system enhancements, Agile ceremonies, automation, documentation, and data integrity initiatives.

Monitors procurement frameworks and pipeline sources, maintains opportunity records and dashboards, researches and qualifies early-stage opportunities, supports procurement responses and bid portals, prepares pipeline reports, and improves processes through automation and AI-enabled tools. The role partners with business development, presales, bid, sales, and delivery teams while ensuring accurate opportunity tracking, effective communication, and timely routing of potential business opportunities.

Manage finance operations for the Belfast business, partnering with site leadership on financial results, reporting, planning, controls, accounting, statutory filings, and process improvements. Lead the finance and accounting team, oversee reconciliations, inventory reporting, cross-border transactions, and US/UK GAAP compliance. Support manufacturing and product introduction projects, implement financial systems and policies, and drive reporting standardization. The role requires occasional travel for training and development.

Manage transformation, change, and implementation projects for public sector clients. Responsibilities include coordinating workstreams, managing stakeholders, maintaining governance and project documentation, conducting research and data analysis, developing recommendations, preparing client deliverables, managing risks, contributing to proposals, and mentoring junior colleagues.