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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