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Blockchain Developer

Job in Seattle, King County, Washington, 98127, USA
Listing for: MastarRec
Full Time position
Listed on 2026-02-28
Job specializations:
  • IT/Tech
    Blockchain / Web3, Data Security, Cybersecurity
Salary/Wage Range or Industry Benchmark: 80000 - 100000 USD Yearly USD 80000.00 100000.00 YEAR
Job Description & How to Apply Below

Mastar Rec is hiring a Blockchain Developer to support innovative financial technology platforms operating across the United States. This role focuses on building, scaling, and securing modern financial systems in a fast‑paced environment.

Key Responsibilities
  • Design, develop, and deploy smart contracts using Solidity on Ethereum and compatible EVM blockchains.
  • Build and maintain dApps
    , including wallets, exchanges, and DeFi protocols.
  • Integrate blockchain technologies with existing systems, APIs, and cloud infrastructures.
  • Design, build, or manage Fin Tech platforms and solutions
  • Collaborate with engineering, product, and compliance teams
  • Ensure regulatory and security best practices
  • Support scalability, performance, and reliability
Requirements Required Skills
  • Fin Tech or financial systems knowledge
  • Data, risk, or software development expertise
  • Strong analytical and communication skills
  • Experience with blockchain frameworks such as Truffle
    , Hardhat
    .
  • Strong understanding of cryptographic principles
    , decentralized networks
    , and consensus mechanisms
    .
Desired Skills
  • Exposure to Polkadot
    , Cosmos
    , or Solana ecosystems.
  • Experience with Layer 2 solutions (e.g., Arbitrum, Optimism).
  • Understanding of zero‑knowledge proofs (zk‑SNARKs / zk‑Rollups).
  • Payments, lending, or blockchain experience
  • Regulatory or compliance knowledge
  • Familiarity with containerization (Docker) and CI/CD pipelines
    .
Benefits Job Benefits
  • Competitive base salary plus crypto or equity incentives
  • Flexible remote‑first work environment
  • Competitive salary and bonus potential
  • Health, dental, and vision insurance
  • Equity or incentive programs (role dependent)
  • Comprehensive health and wellness support
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