Blockchain Developer

Anvik Technologies; United States; On-site; USD 180,000 - 230,000; Full time

Job summary

Anvik Technologies in New York/New Jersey on-site seeks an experienced Blockchain Developer / Blockchain Developer Lead (Java) to design, develop and deploy Web3 components for a Digital Asset Platform. You will interface backend services with public and permissioned networks, audit smart contracts, and collaborate within an Agile team.

The role requires deep Web3 expertise, strong backend skills in Java/Spring or Node.js, and a security-first mindset.

Qualifications

• Bachelor's degree in CS, Engineering, or related discipline; MS is a plus.
• 8+ years of software engineering experience with a strong backend development foundation.
• 2–4 years of hands-on Web3 and blockchain application development, including smart contracts.
• 3–5 years of backend development using Java/Spring, Node.js, or equivalent frameworks.

Responsibilities

• Design, develop, and deploy Web3 components for Digital Asset Platform, including smart contracts.
• Build and maintain backend services interfacing with Ethereum, Hyperledger Besu, Corda, or equivalent.
• Develop, test, and audit Solidity contracts with security best practices.
• Integrate Web3 libraries into enterprise Java and/or Node.js backends.
• Implement asynchronous, event-driven architectures for on-chain events and state synchronization.
• Collaborate with architects to design scalable, secure Web3 infrastructure.
• Participate in code reviews and maintain high engineering standards.
• Support custody solutions, tokenization frameworks, and DeFi/TradFi bridging.
• Contribute to technical docs and architecture notes.
• Stay current with protocol upgrades, new token standards, Layer 2, and tooling.
• Work in Agile/Scrum within distributed global teams.
• Identify and resolve issues across the Web3 stack.

Skills

Web3 Engineering

Backend Eng

Security Mindset

Adaptability

Team Collaboration

Delivery Focus

Attention to Detail

Tooling Proficiency

Git

Jira

Docker

Kubernetes

Hardhat

Foundry

Truffle

Jenkins

Web3J

Web3JS

Ethers.js

Viem

Education

Bachelor's degree in CS/Engineering

MS Degree (a plus)

Tools

Web3J

Web3JS

Ethers.js

Viem

Hardhat

Foundry

Truffle

Docker

Kubernetes

Git

Jira

Jenkins

CI/CD

Job description

Role: Blockchain Developer / Blockchain Developer Lead (Java)

Location: New York / New Jersey (Onsite)

Position Type: Full-Time

Salary: Open

Job Overview

Discover your future at finance domain.

Working at company in finance is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At company, you ll have the opportunity to grow your career, give back to your community, and make a real impact.

Key Responsibilities

• Design, develop, and deploy Web3 components and integrations for company s Digital Asset Platform, including smart contracts, on-chain event listeners, wallet integrations, and blockchain protocol connectors.
• Build and maintain backend services that interface with public and permissioned blockchain networks (e.g., Ethereum, Hyperledger Besu, Corda, or equivalent).
• Develop, test, and audit smart contracts written in Solidity or equivalent languages, ensuring security, correctness, and gas efficiency.
• Integrate Web3 libraries and SDKs (e.g., Web3J, Web3JS, Ethers.js, Viem) into enterprise Java and/or Node.js backend services.
• Implement asynchronous, event-driven architectures to handle on-chain events, transaction lifecycle management, and blockchain state synchronization.
• Collaborate with architects and senior engineers to contribute to the design of scalable, secure, and resilient Web3 infrastructure.
• Participate in code reviews, providing and receiving constructive technical feedback to maintain high engineering standards.
• Support the integration of digital asset custody solutions, tokenization frameworks, and DeFi/TradFi bridging components.
• Contribute to technical documentation, including smart contract specifications, integration guides, and architecture notes.
• Stay current with the rapidly evolving Web3 ecosystem by tracking protocol upgrades, new token standards, Layer 2 solutions, and emerging tooling relevant to institutional use cases.
• Work within Agile/Scrum frameworks, participating in sprint planning, stand‑ups, and retrospectives within a distributed global team.
• Help identify and resolve technical issues across the Web3 stack, escalating where appropriate to ensure delivery quality and timelines.

Qualifications & Experience

• 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.
• 2–4 years of hands‑on experience in Web3 and blockchain application development, including smart contract development and blockchain protocol integration.
• 3–5 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, including 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 including 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.

Competencies & Skills

• Web3 Engineering Depth: Strong command of the Web3 technology stack, from smart contract development to on‑chain/off‑chain integration patterns and blockchain node interaction.
• Backend Engineering Fundamentals: Solid grounding in enterprise software engineering, including API design, microservices, data structures, algorithms, and design patterns.
• Security Mindset: Awareness of common smart contract vulnerabilities (reentrancy, front‑running, integer overflow, etc.) and best practices for secure on‑chain development.
• Curiosity & Adaptability: Genuine enthusiasm for the Web3 ecosystem and the ability to rapidly learn and apply new protocols, standards, and tooling.
• Collaborative Spirit: Strong team player who communicates clearly and constructively with engineers, architects, and non-technical stakeholders.
• Delivery Orientation: Ability to manage personal delivery commitments, prioritize effectively, and produce high-quality output within sprint cycles.
• Attention to Detail: Rigorous approach to testing, code quality, and documentation, particularly important given the immutable nature of on‑chain deployments.
• Tooling Proficiency:
  • Git
  • Jira
  • Jenkins
  • Hardhat / Foundry
  • Docker
  • Helm
  • Observability platforms