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.

Student placement software engineering role developing Magnite’s advertising platform. Responsibilities include software development, quality assurance, test automation, deployment, and solving complex technical problems with experienced engineering teams. The role provides mentorship and exposure to a broad technology stack, including Java, Rust, Scala, JavaScript, Python, C++, SQL, Cassandra, Druid, Hadoop, and Kafka.

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.

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

Lead mechanical engineering delivery for complex data centre projects across multidisciplinary and international teams. Provide technical leadership, collaborate across geographies, support permitting and construction methodologies, manage multiple projects, and contribute to AECOM’s data centre thought leadership and strategic growth. The role requires strong knowledge of building systems and regulations, client communication, digital design workflows, and data centre design and delivery.

Lead business analysis for communications surveillance and regulatory technology initiatives. Gather requirements, map processes, define user stories, investigate data and control issues, coordinate testing, manage risks and dependencies, support platform operations, and contribute to product roadmaps. Collaborate with Compliance, Legal, Operations, Technology teams, and vendors across Agile and Waterfall delivery environments.

Lead counterparty credit risk product and regulatory projects for traded-product markets. Develop and enhance exposure measurement, monitoring, reporting, and stress-testing tools covering NSE, PFE, settlement, and intraday risk. Manage product lifecycles, requirements, releases, UAT, impact analysis, data issues, and remediation plans while coordinating with business, risk, technology, compliance, and senior stakeholders.

Manage a portfolio of private equity, real estate, credit, or debt fund clients. Review financial statements, reports, investor drawdown and distribution calculations, and fund cash movement notices for accuracy and compliance with UK GAAP and IFRS. Coordinate deliverables and timelines with clients, communicate with CFOs and Financial Controllers, resolve issues, and mentor junior team members.