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Chainway Labs is seeking a Senior Full Stack Engineer to join our team at Citrea, Bitcoin’s First ZK Rollup. At Citrea, our goal is to secure on-chain finance with Bitcoin. We believe that Bitcoin and its values should be scaled to serve as the standard for decentralized finance. Achieving this vision requires scaling Bitcoin with zero-knowledge proofs, ensuring on-chain verifiability and data availability within the Bitcoin network. This approach makes Citrea the first scaling solution to enable more complex applications without compromising Bitcoin security and changing its consensus rules.
Job Responsibility:
Build type-safe services in Node.js / Next.js
design clean REST (or RPC) APIs
Model data and write performant PostgreSQL queries, indexes, and migrations
Implement Bitcoin-aware business logic
Integrate with Bitcoin nodes/daemons (RPC/JSON-RPC), handle reorgs, and maintain idempotent jobs
Own reliability: observability, structured logging, alerting, and back-pressure queues
Bake in security from day one
Requirements:
3+ years building full-stack production apps with Node.js/TypeScript and Next.js
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