Blockchain Developer

Blockchain / DLT Developer

London - Hybrid / Remote

Permanent

£90,000 - £110,000

We are looking for an experienced Blockchain / DLT Developer to join a growing technology team delivering innovative blockchain solutions within the financial services sector.

You will design, build and deploy distributed ledger and smart contract solutions, working across Ethereum, Hedera, Algorand and a proprietary enterprise blockchain platform. You will collaborate with architects, engineers, product managers and client stakeholders to deliver secure, scalable and high-performance decentralised applications.

Key Responsibilities

• Design, develop and deploy smart contracts and decentralised applications across Ethereum, Hedera, Algorand and proprietary blockchain infrastructure.
• Develop blockchain solutions tailored to financial services and capital markets clients.
• Contribute to the enhancement of a proprietary enterprise blockchain platform, including protocol improvements and tooling.
• Integrate blockchain components with backend services, APIs and wider platform infrastructure.
• Conduct smart contract testing, auditing and optimisation, focusing on security, performance and gas efficiency.
• Stay current with developments across Ethereum/EVM, Layer 2s, Hedera, Algorand and the wider DLT ecosystem.
• Provide technical guidance to junior developers and contribute to engineering best practice.
• Work with product, project and business teams to understand requirements and support delivery.

About You

• Hands-on experience working with security tokens on distributed ledgers.
• Proven experience developing and deploying Ethereum smart contracts using Solidity.
• Experience with Hedera (Solidity/Hedera Token Service) or Algorand (PyTEAL/TEAL/ARC standards).
• Strong understanding of blockchain fundamentals, including consensus, cryptography, tokenisation and DLT architectures.
• Experience with Web3 libraries such as Web3.js or Ethers.js, or equivalent DLT SDKs.
• Proficiency in Node.js, Python, Go or Java, with experience working with RESTful or event-driven APIs.
• Familiarity with Hardhat, Foundry, Truffle or equivalent blockchain development tools.
• Strong Git and collaborative development experience.
• Excellent analytical, problem-solving and communication skills.
• Comfortable working in a fast-paced, client-facing environment.

Desirable

• Experience with proprietary enterprise blockchain platforms.
• Knowledge of Layer 2s such as Polygon, Arbitrum or Optimism and cross-chain interoperability.
• Familiarity with ERC-20, ERC-1400 and ERC-3643 and/or DeFi protocols.
• Experience in financial services, capital markets or fintech.
• Understanding of blockchain regulatory and compliance requirements.
• Knowledge of CI/CD, Docker, Kubernetes and cloud infrastructure.
• Experience with Agile and DevOps methodologies

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