Blockchain Developer — Talenzaa

The Bitcoin Street Journal; New York (NY); On-site; USD 150,000 - 190,000; Full time

Job summary

The Bitcoin Street Journal is seeking a senior software engineer to lead backend and Web3 development in a blockchain-driven environment. You will design and implement scalable systems, integrate smart contracts, and collaborate with cross-functional teams to deliver secure, production-ready solutions.

Ideal candidates bring 8+ years of software experience, deep Solidity expertise, and hands-on work with Web3 libraries and token standards.

Qualifications

• Bachelor’s degree in CS, engineering, or related field; MS is a plus.
• 8+ years of software engineering experience with strong backend focus.
• 2–4 years in Web3 and blockchain app development including smart contracts.

Skills

Backend development

Web3 development

Java/Spring

Node.js

Smart contract development

Web3 libraries

Blockchain fundamentals

Token standards

Agile/Scrum

DevOps practices

Docker/Kubernetes

Cryptography basics

Cross-team collaboration

Education

Bachelor’s degree in Computer Science, Engineering, or related discipline; MS is a plus

Tools

Solidity

Hardhat

Foundry

Truffle

Web3J

Web3JS

Ethers.js

Viem

Kafka

Docker

Kubernetes

Job description

• Location: United States New York US
• Sector: Blockchain
• Source: web3.career

Location : New York / New Jersey

• Bachelor’s degree in Computer Science, Engineering, or a related discipline; MS is a plus
• 8+ years of overall software engineering experience, with a strong backend development foundation
• 2 to 4 years of hands‑on experience in Web3 and blockchain application development, including smart contract development and blockchain protocol integration
• 3 to 5 years of experience with backend development using Java/Spring, Node.js, or equivalent enterprise frameworks
• Proficiency in Solidity smart contract development, including testing frameworks (Hardhat, Foundry, Truffle) and security best practices
• Hands‑on experience with Web3 libraries such as Web3J, Web3JS, Ethers.js, or Viem
• Solid understanding of blockchain fundamentals — consensus mechanisms, transaction lifecycle, gas models, wallet infrastructure, and key management
• Experience with token standards (ERC‑20, ERC‑721, ERC‑1155, ERC‑3525, or equivalent) and tokenization patterns
• Familiarity with permissioned blockchain networks (Hyperledger Besu, Fabric, Corda, or R3) is a strong plus
• Experience with asynchronous programming, event‑driven systems and message queuing (Kafka, RabbitMQ, or equivalent)
• Familiarity with DevOps practices, containerization (Docker, Kubernetes), and CI/CD pipelines
• Understanding of cryptographic concepts — digital signatures, hashing, PKI, and secure key management — as applied to blockchain systems
• Exposure to Layer 2 scaling solutions (Polygon, Optimism, zkSync, etc.) and cross‑chain interoperability protocols is a plus
• Experience in financial services or regulated industries is a plus
• Familiarity with Agile/Scrum methodologies and distributed team collaboration tools