Backend Engineer (Contract - LATAM)

About Nexus Nexus is the engine for verifiable finance — a blockchain designed to natively embed the world’s financial system into one compounding system. Built to support every major financial market on a single global exchange, Nexus unifies infrastructure that has historically been fragmented across chains and intermediaries. Headquartered in San Francisco with a growing presence in Buenos Aires, Nexus is proud to be a cross-continental team of engineers, cryptographers, and market builders. We’re investing deeply in the Latin American ecosystem — and always looking for world-class talent to join us. Nexus is backed by leading investors, including Pantera, Lightspeed, Dragonfly, Faction, Blockchain Builders Fund, Alliance, and SVA, and works with more than 100 partners across the global finance and blockchain stack. Location: Remote (Argentina) Type: Contract Duration: 12 months with potential for extension The Role The Role We're expanding our backend engineering team in Latin America to build the infrastructure behind Nexus's Layer 1 and its native DEX. We're hiring Backend Engineers at multiple levels — from junior to senior — so if you build reliable, high-performance systems and care about the intersection of finance and decentralized infrastructure, we want to hear from you. You'll collaborate with protocol, product, and frontend teams in San Francisco while contributing remotely from Latam What You'll Do Design and build backend services in Node.js and Rust for Nexus's Layer 1 and DEX. Develop APIs and data pipelines for trading, liquidity, and on-chain verification. Build and maintain blockchain infrastructure components (RPC endpoints, explorers, dev tools). Write clean, well-tested, production-grade code that supports verifiable financial applications. Contribute to architecture discussions and technical decisions based on your level of experience. What We're Looking For Experience building backend systems in a production environment. Proficiency in one or more of: Node.js, Rust, Go, or Python. Experience with relational databases (PostgreSQL or similar) and API design. A track record of shipping reliable software and improving the systems you work on. Excellent communication skills in Business English (spoken & written). Levels We're Hiring Junior 1–3 years - Solid foundations, eagerness to grow, guided ownership Mid 3–5 years - Independent execution, production-grade delivery Senior 5+ years - System design leadership, cross-team impact, mentorship Bonus Points For Experience in financial systems (exchanges, payments, clearing, or settlement). Familiarity with blockchain architectures, smart contracts, or consensus protocols. DevOps experience (Docker, Kubernetes, Terraform, AWS). Web3 or DeFi protocol development experience. Why Join Us Build the backend systems powering the Layer 1 for Verifiable Finance. Collaborate with experts across blockchain, AI, and financial infrastructure. Shape the foundation for a verifiable, transparent, global trading system. Thrive in a fast-moving, high-impact engineering environment.