Front-End Engineer (React.js + TypeScript)

Що робити

Maintain and extend the shared front-end packages (UI components, utilities, web3 helpers, configuration) consumed by all Whitechain applications: triage, fixes, releases, and non-breaking evolution;
Stand up new user-facing applications quickly from the internal boilerplate and shared platform, taking them from scaffold to production;
Build and maintain blockchain-facing features day-to-day: wallet connection, contract interaction, transaction submission and confirmation tracking, chain switching, error and edge-case handling;
Implement and maintain cross-chain bridge user flows (deposits, withdrawals, status tracking);
Work AI-first: execute with coding agents, run parallel agent workflows where appropriate, and apply rigorous human review to everything an agent produces – with extra scrutiny on signing/transaction code;

4+ years of professional front-end experience, with production experience predating AI-assisted development – we require an engineering foundation built before coding agents, verified at interview through deep debugging and fundamentals questions;
Strong React + TypeScript; production experience with Next.js (App Router, server components);
Practical web3 experience: worked with wallet integrations (custodial or non-custodial), querying RPC nodes, and reading on-chain data, with a working grasp of blockchain fundamentals – transactions, gas, nonces, and EVM basics;
Hands-on production experience with viem and wagmi (current major versions): wallet connection, contract reads/writes, transaction lifecycle handling (pending/confirmed/stuck/replaced);
Experience building or integrating cross-chain bridge flows (deposit/withdrawal UX, multi-chain state, confirmation tracking);

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