Senior Blockchain Engineer

zerohash; New York (NY); On-site; USD 180,000 - 280,000; Full time

Job summary

zerohash is seeking a Senior Blockchain Engineer to architect and build infrastructure powering digital asset transactions across multiple networks. You will design blockchain integration services, implement state machines with reliability guarantees, and collaborate with custody providers for secure signing and wallet management.

The role requires 5+ years in software engineering, deep Go expertise, and experience with distributed systems, gRPC, and modern databases.

Qualifications

• 5+ years of software engineering experience, preferably in the FinTech space.
• Deep proficiency with Go and strong knowledge of blockchain technologies.
• 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 schemas.
• Excellent problem solving and ability to work in ambiguity.

Responsibilities

• Design and build blockchain integration services across multiple networks (EVM, Solana, Polkadot, XRP, and others).
• Build and maintain gRPC microservices in Go in an event-driven architecture (NATS JetStream).
• Implement transaction state machines with idempotency and distributed locking.
• Integrate with custody providers for secure signing and wallet management.
• Monitor networks for deposits, confirmations, and anomalies; participate in on-call rotation.
• Communicate with client technical teams when needed.

Skills

Go

Blockchain tech

gRPC

Protocol Buffers

NATS

Kafka

MongoDB

SQL

Distributed systems

Kubernetes

Education

Bachelor's degree in Computer Science

Tools

NATS JetStream

Kafka

MongoDB

Kubernetes

Prometheus

Grafana

OpenTelemetry

Protocol Buffers

Job description

About The Job

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

Key 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

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

Preferred

• 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)

About Zerohash

zerohash is the leading crypto and stablecoin infrastructure platform and the operating system for digital money, powering the next generation of financial services. Founded in 2017, zerohash enables banks, brokerages, fintechs, and payment companies to offer crypto trading, stablecoin payments, and tokenized assets without having to build or manage complex blockchain infrastructure on their own.

The zerohash platform supports three core pillars: Trade, Transact, and Tokenize. Through a single integration, customers can launch regulated crypto buy, sell, and custody services; enable 24/7 stablecoin-based funding, payouts, and settlement; and issue and manage tokenized assets with built-in compliance, risk controls, and reporting. By abstracting away technical, regulatory, and operational complexity, zerohash allows partners to treat digital assets as just another financial primitive: fast, programmable, and global.

zerohash is trusted by some of the world s most recognized financial and consumer brands, including Interactive Brokers, Morgan Stanley, Stripe, Franklin Templeton, BlackRock, DraftKings, Gusto, Worldpay, Kalshi, One Pay, among others. Today, zero infrastructure supports millions of end users across brokerage, wealth, payments, and marketplace platforms globally.

The company is deeply regulated and compliance-first, operating across the U.S. and internationally with licenses and approvals that allow partners to enter crypto and stablecoins with confidence. zerohash has become a trusted partner for enterprises seeking to modernize financial products while meeting the highest standards for security, risk management, and regulatory oversight.

To date, zerohash has raised over $280 million in funding from a mix of leading venture firms and strategic investors, including Morgan Stanley, Interac