Senior Blockchain Engineer

zerohash • Chicago, IL

1d

About The Position

zerohash is looking for a Senior Blockchain Engineer to help architect and build the infrastructure that powers digital asset transactions across multiple blockchain networks. We are a high-performing team looking for an equally ambitious and driven teammate.
The right candidate for this position is detail-oriented, deeply technical, and driven. You are eager to learn new technologies and complex systems. You build resiliency and scalability into the platform at every step.
If you're looking to have a massive impact in one of the most exciting markets in decades, you will find this role challenging and rewarding in equal measure.

Requirements

• 5+ years of software engineering experience, preferably in the FinTech space
• Deep proficiency with Go
• Understanding of blockchain technologies, protocols, and their applications
• Experience with gRPC and Protocol Buffers
• Familiarity with message brokers or event streaming systems (NATS, Kafka, or similar)
• Experience with MongoDB or other document databases
• Understanding of SQL and relational database schema design
• A humble and scrappy get-it-done mindset; you're resourceful and in your element going from 0 to 1
• Excellent problem solving skills — can troubleshoot complex distributed systems
• Comfort with ambiguity; the ability to independently lay out and test clear hypotheses and solve problems without well-defined direction
• Excellent verbal and written communication skills

Nice To Haves

• Bachelor's in computer science or equivalent experience
• Experience at a banking-as-a-service, brokerage-as-a-service, or payment-as-a-service business
• Experience with digital assets or centralized exchanges
• Experience integrating with blockchain custody platforms (Fireblocks, BitGo, or similar)
• Experience with distributed systems patterns (distributed locking, idempotency, state machines, CQRS)
• Experience with smart contracts
• Familiarity with Kubernetes and observability tooling (Prometheus, Grafana, OpenTelemetry)

Responsibilities

• Design and build blockchain integration services — transaction signing, deposit processing, and confirmation tracking — across multiple networks (EVM, Solana, Polkadot, XRP, and others)
• Build and maintain gRPC microservices in Go within an event-driven architecture using NATS JetStream
• Implement transaction state machines with reliability guarantees including idempotency, distributed locking, and chain reorganization handling
• Integrate with custody providers for secure transaction signing and wallet management
• Monitor blockchain networks for deposits, confirmations, and anomalies
• Participate in on-call rotation, responding to production incidents across blockchain infrastructure
• When necessary, communicate directly with client technical teams

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level