Blockchain Specialist

MastarRec; Greater London; On-site; GBP 80,000 - 130,000; Full time

Benefits offered by this job

Crypto incentives

Equity incentives

Remote-first environment

Global blockchain events access

Training access

Job summary

MastarRec is seeking an experienced Blockchain Specialist to design, develop, and implement blockchain-based solutions including smart contracts, tokens, and DeFi integrations. You will work on Ethereal and other compatible blockchains, focusing on security and scalability.

The role involves building dApps, wallets, and token exchanges, with strong emphasis on Solidity and distributed ledger technologies. A remote-first working environment is offered, with opportunities across FinTech, digital

Qualifications

• Proficient in Solidity and Ethereum-based development.
• Experience with blockchain frameworks like Truffle, Hardhat, or Brownie.
• Solid understanding of cryptographic principles and decentralised networks.
• Familiarity with Web3.js, Ethers.js, and node infrastructure.
• Hands-on experience building DeFi, NFT, or DAO applications.
• Version control experience (Git/GitHub).

Responsibilities

• Design and develop smart contracts using Solidity on Ethereal and compatible blockchains.
• Create and deploy dApps, including wallets, token exchanges, and DeFi protocols.
• Integrate blockchain tech with existing platforms and APIs.
• Conduct code reviews and perform security audits on smart contracts.
• Stay current with Web3 developments and governance mechanisms.
• Collaborate with product teams, designers, and DevOps to deliver scalable solutions.
• Write technical documentation for architecture and deployment practices.

Skills

Solidity

Ethereum dev

Web3.js

Ethers.js

Truffle/Hardhat/Brownie

Cryptographic principles

Decentralised networks

Consensus algorithms

Git

Tools

Truffle

Hardhat

Brownie

Job description

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

MastarRec 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.

Job Description

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

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

Job Responsibilities

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

Requirements

Required Skills

• Proficientin Solidity and Ethereum-based development
  
• Experiencewith blockchain frameworks like Truffle, Hard-hat, or Brownie
  
• Solidunderstanding of cryptographic principles, decentralisednetworks, and consensus algorithms
  
• Familiaritywith Web3.js, Ethers.js, and blockchain nodeinfrastructure
  
• Hands-onexperience building DeFi, NFT, or DAO applications
  
• Versioncontrol experience (Git/GitHub)
  

9. Desired Skills

• Experiencewith Layer 2 solutions (Arbitrum, Optimism)
  
• Knowledgeof zero-knowledge proofs (zk-SNARKs/zk-Rollups)
  
• Backgroundin FinTech or cybersecurity is advantageous
  
• Familiaritywith containerization and CI/CD pipelines
  
• Competitivebase salary plus crypto or equity incentives
  
• Flexibleremote-first working environment
  
• Accessto global blockchain events and training
  
• Paidcertifications and online learning access