Blockchain Specialist

London, United Kingdom | Posted on 03/11/2025

Mastar Rec is a specialist recruitment and staffing agency supporting high-growth and technology-driven industries across the United Kingdom, the United States, and global markets
. We partner with organizations to deliver tailored staffing solutions focused on quality, integrity, and long-term value for both clients and candidates.

We are seeking an experienced and forward-thinking Blockchain Specialist to join our client’s growing Web3 and decentralised applications(dApps) team. You will be responsible for designing, developing, and implementing blockchain-based solutions, including smart contracts
, tokensprotocols
, and De Fi integrations, with a strong emphasis on Ethereal
, Solidity
, and distributed ledger technologies
.

This is a high-impact role working on cutting-edge  
Fin Tech
, digital identity
, and decentralised finance (DeFi) ecosystems.

• Designand develop smart contracts using Solidity on Ethereal andcompatible blockchains
• Createand deploy dApps
  , including wallets, token exchanges, and De Fiprotocols
• Integrateblockchain technologies with existing platforms and APIs
• Conductcode reviews and perform security audits on smart contracts
• Stay current with Web3 developments, blockchain frameworks, and governancemechanisms
• Work collaboratively with product teams, designers, and Dev Ops to deliverscalable solutions
• Writetechnical documentation for architecture, design patterns, and deploymentpractices

• Proficient in Solidity and Ethereum-based development
• Experience with blockchain frameworks like Truffle
  , Hard-hat
  , or Brownie
• Solid understanding of cryptographic principles
  , decentralisednetworks
  , and consensus algorithms
• Familiarity with Web
  3.js
  , Ethers.js
  , and blockchain nodeinfrastructure
• Hands-on experience building De Fi , NFT, or DAO applications
• Versioncontrol experience (Git/Git Hub)

• Experience with Layer 2 solutions (Arbitrum, Optimism)
• Knowledge of zero-knowledge proofs (zk-SNARKs/zk-Rollups)
• Background in Fin Tech or cybersecurity is advantageous
• Familiarity with containerization and CI/CD pipelines
• Competitive base salary plus crypto or equity incentives
• Flexible remote-first working environment
• Accessto global blockchain events and training
• Paidcertifications and online learning access