Top Tech Jobs & Startup Jobs in Belfast

Architect and operate scalable cloud and virtualized security demonstration platforms for global sales engineering teams. Automate realistic threat scenarios, self-service lab tooling, product integrations, and deployment workflows. Lead technical readiness for conferences and evaluations, resolve infrastructure incidents, enforce security governance, and coordinate multi-quarter initiatives across engineering, product, information security, and go-to-market teams.

Supports the Programme Management team by coordinating daily internal and external issues, maintaining customer and functional relationships, and helping resolve programme problems. The role requires detailed planning, knowledge of programme phases from inception through delivery, effective communication, and familiarity with company processes. Applicants must hold an HNC in Engineering or a business-related subject and have at least three years of relevant project management experience in an engineering, supply chain, IT, customer service, or programme environment.

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.

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.

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.

Plans, executes, supervises, and reports on risk-based control testing across Markets Trading and Sales. Assesses control design and effectiveness, identifies deficiencies, challenges stakeholders, supports remediation, monitors delivery timelines, and presents outcomes to senior management. The role also coaches junior team members, maintains testing standards, and provides subject matter expertise on operational and compliance risks within financial markets.

Supports Markets Operations by managing client trade activity, assisting with transaction clearance and settlement, investigating issues, preparing stakeholder reports, monitoring risks and controls, improving workflows, and ensuring regulatory requirements are met. The role involves collaboration with traders, clients, and internal stakeholders, with training provided through a Market Operations Academy.

Ten-week Human Resources summer internship at Citi providing training and practical experience across HR functions including learning and culture, total rewards, talent management, talent acquisition, HR partnership, employee relations, and policy. Interns receive mentoring, networking opportunities, technology training, and exposure to Citi’s business groups. Responsibilities include contributing to team projects, presenting accomplishments to senior HR leaders, and developing analytical, communication, organizational, and relationship-building skills.

Technical leader responsible for the frontend architecture of a real-time React and TypeScript trading platform. The role owns monorepo architecture, engineering standards, testing, observability, performance, technical migrations, and cross-team delivery. It involves solving high-scale data rendering and GraphQL subscription challenges, mentoring senior engineers, evaluating tools, and collaborating with product, architecture, and backend teams on technical strategy and roadmap priorities.

Manage end-to-end transfer pricing projects for international clients, including policy design, functional analysis, documentation, economic benchmarking, and financing engagements. Provide commercially focused advice, oversee client relationships, support business development, mentor junior staff, and contribute to practice growth. The role requires strong knowledge of UK transfer pricing legislation, OECD guidelines, intercompany financing, and thin capitalization analysis, along with professional tax or accounting qualifications.

Supports corporate finance advisory engagements, including investor decks, business cases, financial projections, business-plan reviews, M&A target identification, valuations, due diligence, client liaison, deal coordination, business development, and forensic investigations. Manages workflow, budgets, team support, and client relationships while contributing to assignments from planning through completion.