Senior Data Engineer

RUST ENGINEER - TRADING SYSTEMS ABOUT KEYROCK Since our beginnings in 2017, we've grown to be a leading change-maker in the digital asset space, renowned for our partnerships and innovation. Today, we rock with over 200 team members around the world. Our diverse team hails from 42 nationalities, with backgrounds ranging from DeFi natives to PhDs. Predominantly remote, we have hubs in London, Brussels, Singapore and Paris, and host regular online and offline hangouts to keep the crew tight. We are trading on more than 80 exchanges, and working with a wide array of asset issuers. As a well-established market maker, our distinctive expertise led us to expand rapidly. Today, our services span market making, options trading, high-frequency trading, OTC, and DeFi trading desks. But we’re more than a service provider. We’re an initiator. We're pioneers in adopting the Rust Development language for our algorithmic trading, and champions of its use in the industry. We support the growth of Web3 startups through our Accelerator Program. We upgrade ecosystems by injecting liquidity into promising DeFi, RWA, and NFT protocols. And we push the industry's progress with our research and governance initiatives. At Keyrock, we're not just envisioning the future of digital assets. We're actively building it. MISSION STATEMENT We are seeking a Senior Rust Engineer with deep trading systems experience and strong AWS knowledge to join our core Capital Markets division. Candidates with a passion for the Rust ecosystem and a proven track record designing, building, and operating mission-critical trading systems will be at a significant advantage. As part of the engineering team in Capital Markets, you will take ownership of high-impact trading infrastructure, set technical direction in your domain, and drive continuous improvement in system performance, reliability, and operability. You will join a highly-profitable, fast-paced division within Keyrock, where you will be expected to make a senior individual-contributor impact while collaborating with a global, fully-remote team. This role is open to candidates located in European time zones. JOB DESCRIPTION * 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 * Embrace agentic engineering principles: 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 BACKGROUND AND EXPERIENCE TECHNICAL SKILLS * Production-grade Rust experience building high-performance, concurrent systems; proficiency with Tokio is 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 (DPDK) * Familiarity with agentic engineering tools and concepts: LLMs, MCP APIs, AI-First IDEs (e.g. Cursor, Claude Code), harness engineering, and workflow automation * Ability to make sound architectural decisions, articulate trade-offs clearly, and guide implementation across complex systems SENIORITY & COMPETENCIES * Ownership & Reliability – Take full responsibility for your work. Deliver high-quality service, meet deadlines, and follow through on commitments. Anticipate and proactively address potential issues before they arise. * Initiative & Problem-Solving – Approach challenges with a problem-solving entrepreneurial mindset. Make sound, independent judgments and take the initiative to drive solutions rather than waiting for instructions. * Operational Diligence – Respond strategically to technical and operational challenges, ensuring robust and reliable trading infrastructure while instilling confidence in the team’s processes. * Technical Leadership – Influence system design, raise engineering standards, mentor other engineers, and help the team make pragmatic, high-quality technical decisions. * Curiosity & Growth Mindset – Continuously seek to improve your technical skills and knowledge. Stay ahead of industry trends and take the initiative to practice and explore new technologies that excite you. * Agentic Engineering – Embrace AI-assisted workflows and autonomous agents, pushing the boundaries of what engineering teams can achieve through intelligent automation. * Excellent Communication Skills with a team player mindset, collaborating within a fully remote global team. OUR RECRUITMENT PHILOSOPHY We value self-awareness and powerful communication skills in our recruitment process. We seek fiercely passionate people who understand themselves and their career goals. We're after those with the right skills and a conscious choice to join our field. The perfect fit? A senior engineer and crypto enthusiast who’s driven, collaborative, acts with ownership, raises the bar for others, and delivers solid, scalable outcomes. OUR OFFER * A competitive salary package * Autonomy in your time management thanks to flexible working hours and the opportunity to work remotely * The freedom to create your own entrepreneurial experience by being part of a team of people in search of excellence As an employer we are committed to building a positive and collaborative work environment. We welcome employees of all backgrounds, and hire, reward and promote entirely based on merit and performance. Due to the nature of our business and external requirements, we perform background checks on all potential employees, passing which is a prerequisite to join Keyrock. https://keyrock.com/careers/

The Opportunity: Your Next Big Leap @Qover You’re not looking to churn through tickets — you want to build systems that matter, at meaningful scale, alongside a team that values strong engineering. At Qover, you’ll help power embedded insurance experiences used by leading brands like Revolut, Mastercard, BMW, and Monzo. Our platform operates across 32 countries and supports millions of end users through our partners. We’re entering our next phase of growth and investing in the reliability, scalability, and developer experience of our platform. We’re looking for engineers who care about clean architecture, pragmatic decision-making, and building software that lasts.   Your Impact: What You’ll Do As a Sr. Full-Stack Engineer at Qover, you’ll take ownership of complex features end-to-end — from design discussions through implementation, deployment, and monitoring. You’ll contribute to architectural decisions and help evolve our platform as we scale. Here is a taste of what you will be working on: ●        Use AI thoughtfully — in development and beyond: We encourage responsible use of AI-assisted tools to improve productivity, code quality, and documentation. You’ll also have space to explore where emerging AI capabilities could meaningfully enhance our product, in collaboration with engineering and product leadership. ●        Design and evolve scalable services and APIs: You’ll build and maintain Node.js services and React applications that support high availability, strong performance, and international scale. ●        Build for performance and reliability: You’ll design data models in MongoDB, optimize API performance, and ensure services are observable, testable, and resilient. Because leading global brands rely on our platform, you’ll ensure our integrations are reliable, secure, and performant. Our infrastructure runs on Google Cloud, and we continuously improve our deployment, monitoring, and scaling practices. ●        Design with security and privacy in mind: You’ll implement secure authentication and authorization flows, protect sensitive data, and follow best practices for compliance and data protection. ●        Contribute to a strong engineering culture: Through code reviews, knowledge sharing, and mentoring, you’ll help raise the technical bar across the team.   Your Arsenal: The Skills You Bring ●        Strong professional experience building and operating production systems (typically 5+ years). ●        Strong engineering fundamentals and architectural thinking. We operate a microservices-based platform using Node.js, React, and MongoDB. Experience with distributed systems, service boundaries, and API design is important. If you come from ecosystems like Java, C#, Go, or Python and have successfully worked in production systems at scale, we value your ability to adapt. ●        Strong sense of ownership and accountability. You take responsibility for the quality, security, and maintainability of what ships — and you provide thoughtful, high-signal code reviews. ●        Experience designing and maintaining robust RESTful APIs. ●        Strong Git skills and familiarity with CI/CD pipelines and automated deployments. ●        Experience integrating third-party services and managing data consistency across systems. ●        Experience working with cloud environments (GCP preferred). Familiarity with containerization and orchestration (Docker, Kubernetes) is a plus.   The Vibe: Who You Are ●        The Pragmatic Builder: You care about clean, readable code and details — and you know when to prioritize shipping and iteration. ●        The Adaptable Explorer: You’re comfortable in a scale-up environment: shifting priorities, ambiguity, and finding the highest-impact work. ●        The Communicator: You communicate clearly in writing and in conversation, ask good questions, and collaborate well across functions. ●        The Fun Co-Worker: You’re constructive, kind, and collaborative. You enjoy sharing knowledge through code reviews, pairing, and mentoring.   Your Support System: What We Give You ●        Hybrid & remote-friendly: We welcome candidates across Europe. Our Brussels office is a key collaboration hub, and many team activities take place there, but we support flexible remote arrangements and up to one month per year working from anywhere globally. ●        A Hub When You Want It: Full access to our dedicated space at WeWork in Brussels (Rue du Commerce 31) for when you want collaborative whiteboard sessions or legendary team events on the terrace. ●        Exceptional Culture: A deeply collaborative, inclusive community where you are valued for exactly who you are, regardless of nationality, gender, age, sexual orientation, disability, or background. ●        Massive Growth: You’ll join during a high-growth phase, with opportunities to influence our core platform architecture, backend microservices, and overall developer experience.