Senior Blockchain Engineer

TL;DR

Senior Blockchain Engineer (Go/Blockchain): Design and build blockchain integration services for transaction signing, deposit processing, and confirmation tracking across EVM, Solana, Polkadot, XRP with an accent on resiliency, scalability, and reliability guarantees. Focus on implementing transaction state machines, integrating with custody providers, and monitoring networks for anomalies.

Location: Remote (any location); Chicago, US office option mentioned

Company

zerohash is the leading crypto and stablecoin infrastructure platform powering banks, brokerages, fintechs with trading, payments, and tokenized assets.

What you will do

• Design and build blockchain integration services including transaction signing, deposit processing, and confirmation tracking across multiple networks
• Build and maintain gRPC microservices in Go within event-driven architecture using NATS JetStream
• Implement transaction state machines with idempotency, distributed locking, and chain reorganization handling
• Integrate with custody providers for secure signing and wallet management
• Monitor blockchain networks for deposits, confirmations, and anomalies
• Participate in on-call rotation and communicate with client technical teams

Requirements

• 5+ years software engineering experience, preferably in FinTech
• Deep proficiency with Go
• Understanding of blockchain technologies, protocols, and applications
• Experience with gRPC and Protocol Buffers
• Familiarity with message brokers or event streaming (NATS, Kafka)
• Experience with MongoDB or document databases and SQL schema design
• Excellent problem-solving, communication, and comfort with ambiguity

Nice to have

• Bachelor's in computer science or equivalent
• Experience with digital assets, exchanges, custody platforms (Fireblocks, BitGo)
• Distributed systems patterns, smart contracts, Kubernetes, observability tooling

Culture & Benefits

• High-performing, ambitious team focused on massive impact in digital assets
• Core principles: independence, passion, collaboration, initiative, empathy, adaptability, transparency, integrity
• Autonomous work, idea pitching, fast-paced innovation, shared success