Top Tech Jobs & Startup Jobs in Belfast

Processes and reconciles daily purchase and sale transactions across equities, fixed income, and derivatives. Reviews trade exceptions, discrepancies, settlement issues, and posting errors; coordinates with internal teams, counterparties, and clients to resolve inquiries. Maintains regulatory and SLA compliance, performs supervisory oversight, provides operational metrics, and recommends process improvements.

Supports daily administration and execution of global Total Rewards and benefits programs. Responsibilities include employee inquiry support, benefits onboarding, vendor data transmissions, process documentation, communications, open enrollment assistance, invoice tracking, data checks, and compliance reporting. The role also supports identifying AI automation opportunities and requires attention to detail, confidentiality, adaptability, and proficiency with Google Workspace, Excel, or Workday.

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.

Develop and maintain high-quality Java and AWS software applications. Design, build, test, and troubleshoot scalable, secure, high-performance systems across multiple application layers. Contribute to architecture, technical decisions, estimation, product planning, and requirements creation. Mentor junior engineers and collaborate with technical and non-technical stakeholders. Experience with CI/CD, cloud platforms, data storage, and Java BPMN implementations is valuable.

Provide post-deployment configuration, troubleshooting, advisory, and customer support for Workday Pay Transparency Analyzer solutions. Manage requests and SLAs, resolve issues, support releases, facilitate customer workshops, document solutions, collaborate with stakeholders, and mentor junior consultants. The role requires HRIT support experience, advanced Excel and data transformation skills, customer-facing communication, and familiarity with service management practices.

Develop and maintain high-quality C#/.NET applications across multiple layers. Apply secure, scalable, and performant development practices; contribute to architecture, estimation, product planning, and requirements. Mentor junior engineers, collaborate on technical decisions, troubleshoot live applications, and support continuous integration and delivery. Communicate effectively with technical and non-technical stakeholders while balancing user needs and commercial constraints.

Lead and support defined contribution investment consulting for UK clients, including performance monitoring, strategy reviews, default investment design, governance documentation, and implementation. The role includes quality-checking junior colleagues’ work, managing client relationships and budgets, supporting business development, and contributing to thought leadership. Hybrid work is available across several UK offices, with professional qualification study support.

Leads strategic capture management for major water-sector pursuits exceeding £25 million in revenue. Owns pursuit strategy, client positioning, governance, budgets, teams, partner selection, proposals, and bid lifecycle execution. Builds client and stakeholder relationships, develops pipelines, analyzes competition, improves win rates, and coordinates marketing, technical, commercial, legal, and operational teams. Provides coaching, promotes capture best practices, ensures governance and compliance, and positions digital, AI, sustainability, and ESG solutions to support growth.

Supports naval architecture and ship design for new-build, repair, conversion, and modernisation projects. Responsibilities include stability and hydrodynamic assessments, weight and centre-of-gravity calculations, structural and hull-form design, technical documentation, CAD modelling, design reviews, regulatory compliance, and vessel assurance activities. The role includes mentoring and structured development toward Chartered Engineer status, with occasional work at vessels, shipyards, and project sites.

Provides frontline technical and business support for critical Prime Finance applications covering prime brokerage and securities lending. Responsibilities include incident resolution, ticket management, monitoring, system onboarding, stability projects, change management, automation, and proactive resilience improvements. The role collaborates with global support teams, developers, business analysts, and financial business users while serving as a subject matter expert for securities lending applications.

Lead business analysis for an intraday liquidity solution within Citi’s Markets Treasury Technology team. Analyze data using Python and Excel, assess existing systems, translate business requirements into technology designs, define testing scenarios and acceptance criteria, and support software delivery through production rollout. The role partners with business, operations, technology teams, and senior stakeholders, requiring expertise in cash management, intraday liquidity, SWIFT payment and statement messages, Markets products, financial cash flows, and modern software engineering practices.

Twelve-month placement supporting AI tooling integration and reliability engineering for high-availability financial systems. Responsibilities include performance testing, monitoring, automation, system architecture collaboration, resilience requirements, clean coding, and AI-assisted workflow improvements. Candidates should be computer science undergraduates with programming proficiency and foundational knowledge of reliability, monitoring, or AI/ML concepts. The role is based in Belfast with office attendance two or three days weekly.