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Staff Frontend Engineer (React)

TechChain Talent

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TechChain Talent
Job Type   /   Job Level
Full-time   /   Others/Any
Company Location
Argentina
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

Staff Frontend Engineer to own the production web application end-to-end. Primary frontend engineer on a small team (CTO Conrad + 1 full-stack + 1 mobile engineer). Urgent backfill — greenfield v2 rebuild from the ground up.

Key Responsibilities

  • Own the React frontend end-to-end: architecture, feature delivery, performance, and polish
  • Translate Figma files into high-quality, production-ready interfaces; challenge and improve designs
  • Own and evolve the design system and shared component library
  • Integrate with Dynamic.xyz for multi-chain wallet connectivity (EVM, Solana, Bitcoin, Cosmos)
  • Build transaction signing flows, real-time balances, portfolio dashboards, and asset-management experiences
  • Write E2E tests (Playwright) and component tests (Jest + React Testing Library)
  • Leverage AI tools as a daily force multiplier — end-to-end, not just autocomplete


Requirements

  • 10+ years of professional software engineering with frontend ownership track record
  • 7+ years building production React applications with TypeScript
  • Product-oriented mindset — must have opinions about what the product should be
  • Comfortable owning the entire frontend end-to-end in a small, remote team
  • AI fluency — actively uses AI tools end-to-end


Bonus Skills

  • Crypto, Web3, or fintech experience (strongly preferred)
  • Deep knowledge of Redux Toolkit, React Query / TanStack Query
  • Experience with Vite, TailwindCSS, and modern React patterns
  • Experience with Dynamic.xyz, WalletConnect, or similar wallet connectivity
  • Understanding of EIP-712 signing, transaction lifecycle, multi-chain wallet architecture
  • Experience with Playwright for E2E testing
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