Senior Full Stack Web Engineer

Responsibilities

• Deliver end-to-end product features across backend APIs, data models and responsive, high-performance UI components.
• Review and validate scalable software architectures for maintainability, reliability and secure integrations.
• Champion engineering best practices: code reviews, automated testing, documentation and CI/CD.
• Optimise performance via debugging, profiling and system tuning across the stack.
• Collaborate with product and engineering teams to translate requirements into elegant, performant solutions.
• Maintain operational hygiene: clear documentation, smooth migrations and predictable deployments.
• Explore and share emerging technologies, with particular interest in Rust, WebAssembly and modern API frameworks.

Requirements

• Full-stack experience
• Frontend frameworks
• Rust backend
• API design
• DB schema
• CI/CD workflows
• HTTP/REST knowledge
• Performance tuning
• Product mindset
• Collaboration skills

Preferred Qualifications

• Fintech/crypto exposure
• Data visualisation
• Observability stacks
• Kubernetes experience
• Cloud-native experience
• Secure coding
• Infrastructure-as-code
• Sensitive-data handling
• Distributed systems curiosity
• Telemetry & tracing

Benefits

• Competitive salary package
• Flexible working hours and remote working opportunities
• Autonomy and entrepreneurial team culture
• Collaborative, merit-based environment
• Background checks required as part of hiring process

About the Company

Keyrock is a global digital asset firm founded in Brussels in 2017. The company provides market making, options trading, high-frequency trading, OTC and DeFi services, operating across 80+ venues worldwide. With a predominantly remote workforce and hubs across Europe and Asia, Keyrock blends deep trading expertise with product and engineering innovation. The engineering organisation values product-minded developers who care about UI/UX, backend reliability and shipping measurable business value.