Top Tech Jobs & Startup Jobs in London

Lead development of large-scale, real-time and historical market-data applications using KDB/Q. Drive system design, coding, performance optimization, scalability, high availability, and CI/CD automation. Mentor team members, manage delivery, partner with stakeholders and support teams, and help migrate and re-architect systems to AWS while improving operational stability and testing practices.

Lead design and implementation of cloud-native platform services, own the full SDLC including CI/CD automation, ensure reliability and security, mentor engineers, drive architecture reviews, adopt tooling (including agentic AI), and improve developer experience and operational excellence across teams.

Support external reporting for Equities Product Control by designing and maintaining controls, reconciling trading positions and balances, investigating data mismatches, driving process improvements and automation (Alteryx), supporting audits, and collaborating with trading, treasury, operations and finance teams.

Manage day-to-day pensions product operations: own roadmap, triage and close incidents, maintain Jira backlog, coordinate cross-functional delivery, drive root-cause fixes, report to governance and stakeholders, and ensure regulatory alignment and continuous improvement of customer journeys.

Lead engineer designing, developing, and troubleshooting ultra-low-latency electronic trading systems. Write high-quality C++14 production code for multithreaded, networked applications, collaborate with traders and cross-functional teams, lead engineering practices, participate across the SDLC, and drive automation and stability improvements for order routing, matching engines, market access, and risk systems.

Support the Treasury Wind Down team by preparing analyses and automating processes for orderly wind down of trading and derivatives. Contribute to Resolution Financial Analytics, prepare regulatory submissions, refine methodologies, and develop stakeholder materials. Collaborate with SMEs and technology partners to enhance regulatory readiness and deliver high-quality analytics for US and EMEA recovery planning.

Design, build, and maintain scalable, secure, cloud-native backend systems using JVM languages. Ensure reliability, performance, and zero-downtime releases; use domain modeling, automated testing, and enterprise AI-assisted tools to improve code quality and delivery.

Lead development of the QES trading platform: design, build, test, and maintain production-grade software. Collaborate with front office (trading, structuring, research), deliver secure high-quality code (Python/Java/TypeScript/React), automate operational remediation, and lead agile engineering practices and communities of practice.

Lead architecture and roadmap for platform engineering; mentor engineers; design and deliver secure, scalable cloud-native infrastructure; ensure production stability (You Build It, You Run It); automate operations and implement DORA/SLIs/SLOs; drive FinOps and performance tuning; adopt and govern agentic AI-enabled engineering workflows with security and validation guardrails; collaborate with product, business, and security stakeholders.

Cover leveraged loans, high-yield bonds and special situations; produce credit analysis and trading commentary, support traders in pricing and market-making, manage desk inventory and documentation, prepare client-facing materials, and liaise with market and legal counterparts.