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Join a high-performance engineering group responsible for the systems that sit at the heart of a global trading operation. This team owns the core risk platform, handling everything from trade intake and real time position tracking to PnL calculation, inventory control and internal routing logic. The platform processes heavy market data flows and fast changing state across both live and historical workloads, so efficient memory management, intelligent data structures and tight control of latency are essential. Significant investment is now reshaping this architecture into a modern, service-oriented environment. We are looking for engineers who enjoy solving problems at scale and want to design robust components that can ingest, compute and distribute data across a distributed Linux estate. You will be involved in building services that must respond predictably under load, propagate risk metrics across internal systems and support a front office that depends on accuracy and speed.

Ncounter are supporting a large-scale Defence and Public Safety programme seeking a Service Design Lead with a strong background in user research, creative problem solving and end to end service design. You will guide multidisciplinary teams to create services that are evidence driven, inclusive, and built around real user needs. This role blends hands on research leadership with strategic service design, ensuring clarity from discovery through to delivery. You will shape propositions, map complex journeys, and drive insight led decision making across multiple workstreams. You will support and coach researchers and designers, raise capability standards, and ensure outputs meet recognised user centred design expectations across government.

Ncounter are supporting a globally recognised systematic investment firm in hiring a Python focused Software Developer to join their Post Trade engineering group. This team builds and operates the pipelines that sit at the heart of post trade processing, powering millions of transactions and ensuring accuracy, timeliness and compliance across global markets.

Join a high-performance trading platform and take ownership of their Observability and SRE evolution. You’ll work at scale, shaping data ingestion and monitoring pipelines that handle huge real-time trading flows.

Ncounter are looking for a User Research Lead to support a major Defence programme, guiding multidisciplinary teams and ensuring user insight shapes every phase of delivery. You will balance hands on research with team leadership, while keeping delivery aligned to user needs, policy requirements and programme outcomes.

Ncounter are hiring a DV Cleared Business Analyst to support a major Defence software delivery programme. This role suits someone who has worked in agile, client facing environments and can translate complex business needs into clear, concise and prioritised requirements for development teams.

Ncounter are supporting a major Defence initiative, and we are looking for a Platform Solution Architect with strong AWS expertise and a track record delivering complex cloud platforms in secure environments. This is a hands-on architecture role suited to someone who can shape technical strategy, guide Agile teams and work confidently with senior customer architects across demanding Defence programmes.

Ncounter are hiring an Identity Architect to support a high priority Defence programme. This role focuses on designing and documenting Identity, Credential and Access Management architectures and ensuring they integrate cleanly with wider MOD identity initiatives. The programme requires someone who understands Defence environments, can operate at Principal level and is confident working with senior technical stakeholders. You will be responsible for shaping identity designs, guiding implementation teams and producing clear and accurate architectural documentation.