Backend Engineer (Contract - LATAM)

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

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  Design and build backend services in Node.js and Rust for Nexus's Layer 1 and DEX.

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  Develop APIs and data pipelines for trading, liquidity, and on-chain verification.

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  Build and maintain blockchain infrastructure components (RPC endpoints, explorers, dev tools).

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  Write clean, well-tested, production-grade code that supports verifiable financial applications.

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  Contribute to architecture discussions and technical decisions based on your level of experience.

• Experience building backend systems in a production environment.

• Strong engineering leadership

• Very solid systems knowledge

• Strong experience developing backend systems in Node.js, Rust, C++, Typescript, Go or similar languages.

• Experience with relational databases (PostgreSQL or similar) and API design.

• A track record of shipping reliable software and improving the systems you work on.

• Experience with distributed systems, financial infrastructure, or blockchain.

• Excellent communication skills in Business English (spoken & written).

• Junior 1–3 years - Solid foundations, eagerness to grow, guided ownership

• Principal 8+ years - System design leadership, cross-team impact, mentorship, leading 5 Jr engineers in parallel and teams of at least 10 engineers

• Low-latency systems

• Experience with exchanges

• Trading systems / financial environments

• Familiarity with blockchain architectures, smart contracts, or consensus protocols.

• DevOps experience (Docker, Kubernetes, Terraform, AWS).

• Web3 or DeFi protocol development experience.