Rust Engineer - Trading Systems

As a Senior Rust Engineer in Capital Markets at Keyrock, you will design, build, and operate mission-critical trading systems that power the firm's market making and algorithmic trading across 80+ exchanges. You'll take ownership of high-impact trading infrastructure, set technical direction in your domain, and drive continuous improvement in system performance, reliability, and operability. This role is based in European time zones and joins a highly-profitable, fully-remote engineering team.

What you'll do

• Design, develop, and optimise low-latency, mission-critical trading systems
• Own key trading stack components end-to-end, from architecture through to production operation
• Collaborate closely with quants, traders, and engineers to deliver solutions that improve trading performance and resilience
• Maintain and evolve trading infrastructure with a focus on performance, stability, observability, and operational excellence
• Troubleshoot complex production issues across exchange connectivity, execution, and market data handling
• Drive engineering standards through technical leadership, code reviews, and mentoring
• Leverage AI-assisted workflows, drive automation of operational tasks, and help evolve the team's agentic tooling
• Contribute to functional, component, and production-readiness testing for critical trading components

What you bring

• Production-grade Rust experience building high-performance, concurrent systems, with Tokio proficiency as a strong advantage
• Hands-on experience in a systematic trading environment (HFT, market making, quantitative trading, or similar), with solid understanding of execution, market data, and operational risk
• Strong AWS and Linux expertise, including cloud infrastructure trade-offs for latency-sensitive workloads, shell scripting, debugging, and production troubleshooting
• Proficiency in Python or other scripting languages for strategy development, automation, and operational tooling
• Deep familiarity with trading system protocols (FIX, REST, WebSocket), exchange connectivity, and market data feeds
• Solid grasp of low-latency networking: TCP/UDP, packet and latency path analysis, dedicated network infrastructure, and kernel bypass techniques such as DPDK
• Ability to make sound architectural decisions, articulate trade-offs clearly, and guide implementation across complex systems
• Ownership and reliability: take full responsibility for your work, deliver high-quality service, and proactively address potential issues
• Initiative and problem-solving: approach challenges with an entrepreneurial mindset and drive solutions independently
• Operational diligence: respond strategically to technical and operational challenges with a focus on robustness and reliability
• Technical leadership: influence system design, mentor other engineers, and help the team make pragmatic, high-quality technical decisions
• Excellent communication skills and a collaborative approach within a fully remote global team

Nice to have

• Familiarity with agentic engineering tools and concepts: LLMs, MCP APIs, AI-first IDEs (e.g. Cursor, Claude Code), harness engineering, and workflow automation

What we offer

• A competitive salary package
• Flexible working hours and the opportunity to work remotely
• Autonomy to create your own entrepreneurial experience as part of a team pursuing excellence

About Keyrock

Keyrock is a leading market maker and algorithmic trading firm founded in 2017, operating across 80+ exchanges and working with a diverse range of digital asset issuers. With over 200 team members spanning 42 nationalities and hubs in London, Brussels, Singapore, and Paris, Keyrock pioneered the adoption of Rust for algorithmic trading and now spans market making, options trading, high-frequency trading, OTC, and DeFi trading desks.