Top Tech Jobs & Startup Jobs in London

Develop and optimize low-latency trading systems alongside traders, researchers, and risk analysts. Participate in training, own well-architected code, and apply knowledge of algorithms, concurrency, CPU architecture, operating systems and databases to support real-time market decisioning.

Ten-week software engineering internship building and shipping production code for Optiver's real-time trading systems. Work with mentors and cross-functional teams on performance-sensitive projects, learn trading fundamentals, and may receive a full-time offer based on performance.

Join as a graduate quantitative researcher to design, build, test and deploy statistical and machine learning models for pricing, forecasting and signal discovery using large-scale market and unstructured data. Collaborate with researchers, traders and engineers to monitor production models, refine assumptions, and accelerate research-to-production using AI-enabled workflows.

As a Data Software Engineer, you will enhance reference data products, establish technical direction, and ensure data quality and compliance within trading systems.

As a Senior Digital Assets Software Engineer, you will design and build trading systems, improve system reliability, and collaborate with traders to prototype trading strategies. Your role involves direct integration with cryptocurrency exchanges and contributing to the digital asset platform's architecture.

Design, implement, and operate large-scale C++ build systems and developer tooling. Improve build speed, reliability, and reproducibility via caching, incremental builds, remote execution, CI/CD pipelines, observability, and reusable build libraries. Collaborate with engineering teams to reduce friction and roll out standardized workflows, container images, and pipelines while balancing codebase-specific needs.

As a Cloud Infrastructure Engineer, you will enhance Optiver's cloud systems for digital assets trading, focusing on performance, security, and resilience. Responsibilities include designing low-latency infrastructure, implementing CI/CD for changes, and managing cloud performance setups.

Hands-on treasury operations role owning daily cash, collateral and margin workflows for OTC exotics and wider products. Manage account and counterparty relationships, reconcile margin and P&L breaks, optimize liquidity and cash reinvestment, support CSA/ISDA collateral terms, regulatory reporting and controls, and partner with Tech to automate settlement and margin processes while evaluating external platforms.