Chaincode Developer

PURVIEW; San Francisco (CA); Remote; USD 120,000 - 160,000; Full time

Job summary

A technology company in San Francisco is looking for a Senior Smart Contract Developer to design and implement core payment chaincode in Go. You'll work on integrating multi-currency support and optimize execution paths. Strong experience in Hyperledger Fabric and Go programming is required. This role offers a contract duration and involves working in a dynamic tech environment, making it ideal for those passionate about blockchain technology and innovative payment solutions.

Qualifications

• 6+ years of development experience, with 3+ years in smart contracts or chaincode.
• Strong proficiency in Go, especially with concurrent programming.
• Hands-on experience with Hyperledger Fabric chaincode development.

Responsibilities

• Design and implement core payment chaincode in Go for authorization and reconciliation.
• Build the automated Policy Engine for approval enforcement.
• Optimize execution paths to minimize read/write sets.

Skills

Go proficiency

Event-driven architecture

Smart contracts

Hyperledger Fabric

Performance optimization

Unit testing

Education

BS in Computer Science or equivalent

Tools

MockStub

Fabric Integration Tests

Caliper Benchmarks

Job description

Job Title: Senior Smart Contract Developer (Chaincode)

Duratioon: Contract

Key Responsibilities

• Design and implement core payment chaincode in Go for authorization, settlement, and reconciliation
• Build the automated Policy Engine enforcing approvals based on configurable rules, roles, and risk scores
• Implement Private Data Collections for confidential settlement data across organizational boundaries
• Develop endorsement policy logic balancing security (AND policies) with latency constraints
• Optimize execution paths to minimize read/write set generation and maximize parallel validation
• Implement multi-currency support with atomic pathfinding for cross-currency settlements
• Build comprehensive test suites using Fabric MockStub and integration frameworks
• Design zero-downtime chaincode upgrade and versioning strategies
• Implement WASM-based modules for computationally intensive sandboxed operations
• Develop event emission patterns for Kafka integration and real-time webhook delivery
• Conduct code reviews and maintain business logic documentation
• Embed KYC/AML screening logic directly into transaction chaincode

Required Qualifications

• 6+ years development, 3+ years smart contracts or chaincode
• Strong Go proficiency with concurrent programming and performance optimization
• Hands-on Hyperledger Fabric chaincode development and deployment lifecycle
• Understanding of Execute-Order-Validate transaction flow implications
• Experience with Private Data Collections and cross-channel invocations
• Knowledge of RocksDB key-value and CouchDB rich query interactions
• Familiarity with gRPC/Protobuf for SDK integration
• Event-driven architecture experience (Kafka, RabbitMQ)
• Strong testing discipline: unit, integration, and performance benchmarks
• BS in Computer Science or equivalent

Technical Skills Required

Category Skills

Blockchain

• Fabric Chaincode, Stellar Soroban, Private Data Collections

Testing

• MockStub, Fabric Integration Tests, Caliper Benchmarks

Preferred Qualifications

• WASM/WebAssembly smart contract runtime experience
• Financial payment protocol knowledge
• Formal verification or static analysis for contracts
• Hyperledger open-source contributions
• ISO 20022 message format understanding