Java Web3 Jobs in United States

1,048 jobs found

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Job Position Company Posted Location Salary Tags

Swoon

San Francisco, CA, United States

$144k - $163k

AAA Global

New York, NY, United States

$122k - $240k

Venusgeo Solutions

United States

$72k - $80k

Polymarket

New York, NY, United States

$84k - $110k

Albert Bow

New York, NY, United States

$91k - $109k

Crossmint

Miami, FL, United States

$150k - $210k

visa

Austin, TX, United States

$152k - $243k

Crossmint

United States

$150k - $210k

syncreonconsulting

United States

$94k - $156k

Bright Mind Solutions LLC

United States

$90k - $100k

Chainlink Labs

United States

$98k - $112k

Alchemy

San Francisco, CA, United States

$300k - $350k

Hatch Pros

United States

$96k - $105k

visa

Austin, TX, United States

$83k - $89k

Chainalysis

New York, NY, United States

$180k - $205k

Swoon
$144k - $163k
San Francisco Bay Area US
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Senior Blockchain Engineer


We are seeking an experienced and innovative Senior Blockchain Engineer to drive the development of a next-generation decentralized ecosystem that integrates identity, payments, and real-world utility. This role is for a highly experienced engineer who is passionate about creating secure, scalable, and human-centric Web3 infrastructure.


Key Responsibilities

  • Design, build, and maintain Layer 1 blockchain protocols, smart contracts, and distributed systems that power our core digital ecosystem.
  • Develop tokenized payment systems and identity verification flows, ensuring maximum security, usability, and data privacy.
  • Implement and audit smart contracts for token utility, governance, and transactional logic across various business sectors.
  • Integrate advanced identity verification methods and payment processing into decentralized applications.
  • Ensure the security, scalability, and efficiency of all blockchain systems through rigorous testing, code audits, and adherence to industry best practices.
  • Partner closely with Product, Engineering, and QA teams to align blockchain development with the overall company roadmap and evolving user needs.
  • Mentor junior engineers, contribute to engineering best practices, and help establish high standards for decentralized development.
  • Stay ahead of emerging trends in Web3, DeFi, Real-World Asset (RWA) tokenization, and decentralized identity to guide future innovation and strategy.

Required Qualifications

  • Education: Bachelor’s or Master’s degree in Computer Science, Cryptography, or a related technical field.
  • Experience: 5+ years of hands-on blockchain development experience across protocols, dApps, Layer 1/Layer 2, or DeFi/Web3 projects.
  • Proficiency: Expert-level proficiency in Java and Solidity.
  • Deep Technical Knowledge: Strong understanding of smart contract security, advanced cryptography, and distributed system design.
  • Platform Experience: Experience working with Ethereum, Solana, or other major blockchain platforms.
  • Track Record: Proven ability to deliver high-quality, production-grade blockchain systems.
  • Work Authorization: Must be legally authorized to work in the United States. (We do not sponsor work visas at this time.)