Senior Full Stack Engineer, Growth & Experimentation

• Build and ship consumer-facing features quickly in React Native and TypeScript
• Own experiments end-to-end from hypothesis, design, build and launch through measurement and iteration
• Use platforms such as Statsig to test globally or within specific markets
• Improve onboarding, activation and feature discovery to drive conversion, engagement and trading revenue
• Build viral acquisition features and value-add growth features on Krak’s existing product offering
• Contribute to backend services and APIs when experiments require it
• Read experiment results and decide whether to scale, iterate or discontinue initiatives
• Drive autonomous technical decisions amid evolving priorities and limited upfront planning
• Work closely with Product on a continuous pipeline of fast, lightweight experiments

• 6+ years of software development experience building and shipping large-scale, consumer-facing applications
• Strong, hands-on React and React Native experience
• Demonstrated experience running growth experiments at consumer-facing businesses with measurable impact on conversion, activation, retention or revenue
• Working backend proficiency; ability to design and implement services and APIs
• Openness to working in Rust
• Strong JavaScript/TypeScript fundamentals
• Hands-on experience with APIs, WebSockets and real-time systems, mobile performance, testing, and modern development workflows
• Practical experience designing, running and analysing A/B tests, feature flags, statistical significance, product analytics, funnel and cohort data
• End-to-end ownership of product features and a strong product engineering mindset
• Customer-facing product experience within fintech, digital banking, payments, trading or crypto is nice to have
• Hands-on experience with Statsig or a comparable experimentation platform is nice to have
• Rust experience is nice to have
• SQL and self-serve analytics experience is nice to have
• AI fluency is nice to have
• Native mobile development, distributed systems, microservices, or hyperscaling consumer technology experience is nice to have

• Dogfooding is a requirement for everyone once they join Kraken
• Equal opportunity employment and non-discrimination commitment
• Job-related skills or work-style assessments applied consistently across candidates
• Qualified applicants with criminal histories considered consistently with the San Francisco Fair Chance Ordinance