About Control Control is a private custody platform for digital wealth — built for families and individuals who think in generations, not market cycles. Multi-chain assets secured,

organized, and accessible for the long term. Websites:

controlsoftware.co | privatecustody.com About the Role NOTE:

Despite the "full-stack" title, this is a mostly frontend-oriented role (not 50/50). Day-to-day skews frontend, but solid backend knowledge is needed to cover gaps and ensure seamless integration.

Greenfield v2 rebuild: new architecture, new stack, new standards.

Key Responsibilities - Design and build backend APIs and services for wallet management, transaction signing, asset tracking, and portfolio operations - Own PostgreSQL schema design — modeling financial and blockchain data - Build and maintain blockchain interaction layers for EVM chains, Solana, Bitcoin, Cosmos -

Implement webhook handlers, background jobs, and async workflows -

Design systems that handle concurrency, idempotency,



and failure recovery - Support frontend integration — wire React components to production API endpoints - Leverage AI tools as a daily force multiplier — end-to-end, not just autocomplete Requirements - 10+

years of professional software engineering with technical leadership track record - 8+ years working with TypeScript across both Node.js and React environments - Product-oriented mindset —

must think about why, not just what - Experience handling concurrency, idempotency, and failure recovery in financial/payment systems - Comfortable owning features end-to-end in a small, remote team - AI fluency — actively uses AI tools end-to-end Bonus Skills

- Crypto, Web3, or fintech backend experience (strongly preferred)
- Deep experience with PostgreSQL (schema design, indexing, query optimization, ORMs) - AWS infrastructure (EC2, Lambda, ECS, RDS,

S3, Terraform, CDK) - Familiarity with Dynamic.xyz, Fireblocks, or similar wallet/custody infrastructure - Modern Web3 libraries

(ethers.js, viem, Solana Web3.js)

📌 Staff Full-Stack Engineer (TypeScript) (Buenos Aires)
🏢 TechChain Talent
📍 Buenos Aires