About CosX CosX helps companies modernise their business with practical AI and clean engineering. We plan, build and run digital products so our clients can move faster and focus on growth. The Project: One of our clients has an infrastructure platform for cross-border private credit . Their permission-based protocol lets banks and lenders: Originate loans online through simple APIs and dashboards. Securitise portfolios so loans can be packaged and sold. Service loans with real-time repayment tracking and automated “borrowing-base” checks that flag issues early. View live loan data and asset health in one place, bringing more trust and lower costs to global lending. CosX is building key RUST components that power these features. What you’ll do Write and improve Rust services that move money, store loan data and keep everything in sync. Build clear APIs other teams can call from web or mobile apps. Add tests and safety checks so funds can’t go missing and rules are always followed. Work with product and QA to keep code fast and easy to understand. Join a short daily stand-up (15 min) and spend the rest of your 3-4 focused hours coding or reviewing pull-requests. What we’re looking for 3-4 years professional Rust experience (any domain). Solid grasp of data structures, async programming and advanced SQL. Familiarity with payments or lending terms helps you ramp up faster, but we’ll guide you if you’re new. Bonus points (nice to have, not required): TypeScript, Solidity or Move; past work on fintech or blockchain projects. Why join Real impact – your Rust code will handle live loans, not demo data. Flexible hours – focus work, no time-tracking. Small supportive crew – quick reviews, helpful feedback. Growth path – chance to take on more ownership or move into full-time if you wish. How to apply Send an email to contact@cosx.ai with: A short note on why you enjoy coding in Rust. A link to your GitHub or a project you can share. Your résumé (PDF or LinkedIn).  We reply within three days. CosX welcomes applicants from all backgrounds. Skill, curiosity and honesty matter most. Show more Show less