Staff Full-Stack Engineer (TypeScript)

Frontend-leaning • Buenos Aires / LATAM

About Rad Hires

Rad Hires connects high-performing engineers with ambitious teams that move fast and build things that matter. We partner with lean, product-driven organizations to find the kind of talent that ships, owns outcomes, and raises the bar — not just fills a seat.

About the Role

Our client is a private custody platform built for long-horizon digital wealth management — focused on secure multi-chain asset custody, portfolio operations, and long-term reliability rather than speculative trading.

The team is migrating to a new solution and needs additional frontend bandwidth, while still expecting strong backend judgment and seamless systems integration. You'll join a small, senior, product-minded team to help build a greenfield v2 platform with new architecture, a new stack, and higher technical standards.

The role touches wallet operations, transaction signing, custody flows, portfolio management, and core product integration across multiple blockchains.

Responsibilities




- Design and build APIs and services for wallet management, transaction signing, asset tracking, and portfolio operations across multiple blockchains.
- Own PostgreSQL schema design for financial and blockchain data, including safe and type-aware migrations.
- Build and maintain blockchain interaction layers spanning EVM chains, Solana, Bitcoin, and Cosmos.
- Implement webhook handlers, background jobs, and async workflows for transaction monitoring, balance refreshes, and wallet lifecycle events.
- Design systems that correctly handle concurrency, idempotency, and failure recovery in financial workflows.
- Write migration scripts to transition legacy data into the v2 architecture.
- Support frontend integration work and wire React components to production APIs when it accelerates delivery.
- Write automated tests across unit, API, integration, and end-to-end layers.
- Use AI tools as a practical force mu

📌 Staff Level Software Engineer (Buenos Aires)
🏢 Rad Hires
📍 Buenos Aires