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, S

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