Ncounter Limited

Contract Cyber Security Architect Rate: £650 to £750 p d Clearance: SC or DV required Location: Hybrid with some client site time Ncounter are supporting a Defence programme building new cloud services on MODCloud, moving first onto GCP and later SCC. We are seeking a Cyber Security Architect to join a newly formed Agile Release Train and ensure the solution being delivered is secure, practical, and aligned to NIST and wider HMG standards. You will work across several scrums, providing clear technical guidance, shaping controls, and enabling secure design in a fast moving environment with limited runway. Key Responsibilities • Translate NIST controls into practical cloud design and implementation guidance. • Lead the design of an ABAC access model using Open Policy Agent. • Shape an IdP approach that links human identity to ABAC policies. • Advise on delegation of authority models for security systems. • Assure security decisions across the cloud architecture and delivery pipeline. • Produce clear, concise documentation to support accreditation and engineering teams. What You Bring • Strong cyber security architecture experience in Defence or complex public sector settings. • Knowledge across identity, PKI, vulnerability management, SIEM, cryptography and secure configuration. • Ability to guide teams in an agile environment and work across multiple scrums. • Flexible mindset and confidence dealing with evolving requirements. • Active SC or DV clearance. If you want to deliver meaningful impact on a major Defence programme and drive secure engineering from day one, we would like to speak with you. Send your CV to Ncounter for a confidential discussion.

C++ Software Developer, Risk Technology 160,000 to 170,000 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. You will work in an engineering culture that values clarity, simplicity and strong design. Expect to collaborate with colleagues across regions, refine performance at a system level and contribute to a platform that is constantly evolving as trading strategies and data volumes grow. What you bring Strong C++ development experience in Linux environments, ideally 4 to 6 years. A deep grounding in algorithms, multithreading and performance optimisation. Experience contributing to large scale or distributed systems. Familiarity with modern messaging technologies such as Kafka, AMPS or QPID. Awareness of service-oriented patterns and how to build clean interfaces between compute components. Exposure to Python or bash for tooling and automation. Any experience with Q or KDB is valuable. A collaborative approach and the curiosity to explore new engineering techniques. This is an opportunity to build high impact software in a research driven trading environment. If you want to work on complex, data intense systems that reward strong engineering, get in touch to explore the role with Ncounter.

Principal Python Engineer London Permanent Hybrid Ncounter is supporting a global investment firm in hiring a Software Developer to help design and evolve internal compute frameworks that underpin their trading and research platforms. This is a high-impact role, working at the intersection of software engineering and distributed systems, with the opportunity to build scalable tools and frameworks used across the business. What you ll do: Design, develop, and maintain performant, reliable frameworks and services in Python Build productivity tools and platforms that streamline workflows across investment and technology teams Contribute to code reviews and best practices, improving overall development quality Work across distributed systems, containers, and automation pipelines to deliver scalable solutions What we re looking for: 6+ years professional software development experience Strong proficiency in high-performance Python (deep ecosystem knowledge and best practices) Experience with at least one JVM language (Java, Kotlin, Scala) is an advantage Background in distributed systems and large-scale compute frameworks Familiarity with Docker, Kubernetes, Linux environments, and CI/CD automation This role offers the chance to work on complex technical challenges at scale, with direct impact on high-performance computing platforms. If you re a skilled Python engineer with distributed systems expertise and want to join a world-class engineering environment, apply today for a confidential conversation.