Blockchain / DLT Developer

As a Blockchain Developer at Delta Capita, you will design, build, and deploy distributed ledger and smart contract solutions for financial services clients. You work across Ethereum, Hedera, Algorand, and MACH Chain (our proprietary blockchain platform) to deliver secure, scalable, and high-performance decentralised applications. Collaborating with architects, product managers, and client stakeholders, you bring deep technical expertise to solving complex on-chain challenges.

What you'll do

• Design, develop, and deploy smart contracts and decentralised applications across Ethereum, Hedera, Algorand, and MACH Chain
• Design and implement blockchain-based solutions tailored to the specific requirements of financial services clients
• Contribute to the ongoing development and enhancement of MACH Chain, including protocol-level improvements and tooling
• Collaborate with backend engineers, solution architects, and product managers to integrate blockchain components with broader platform services and APIs
• Conduct rigorous smart contract auditing, testing, and optimisation to ensure security, correctness, and gas efficiency
• Stay current with emerging developments across Ethereum (EVM/L2), Hedera Hashgraph, Algorand, and the broader DLT ecosystem
• Provide technical guidance and support to junior team members and contribute to internal knowledge sharing
• Engage with project managers, product managers, and business analysts to understand requirements, present solutions, and support delivery
• Contribute to the continuous improvement of MACH's development processes, standards, and tooling

What you bring

• Hands-on experience developing and deploying smart contracts on Ethereum (Solidity) and familiarity with at least one of Hedera (Solidity/Hedera Token Service) or Algorand (PyTEAL/TEAL/ARC standards)
• Proven experience working with security tokens on distributed ledgers
• Strong understanding of blockchain fundamentals including consensus mechanisms, cryptographic primitives, tokenomics, and DLT architectures
• Experience working with Web3 libraries such as Web3.js, Ethers.js, or equivalent SDKs for Hedera and Algorand
• Proficiency in one or more backend languages (e.g. Node.js, Python, Go, Java) and RESTful/event-driven API design
• Familiarity with blockchain development toolchains including Hardhat, Truffle, Foundry, or equivalent
• Experience with version control (Git) and collaborative development workflows
• Strong analytical and problem-solving skills with a rigorous approach to security and edge-case reasoning
• Excellent communication skills, with the ability to work effectively across technical and non-technical stakeholders
• Comfort working in a fast-paced, client-facing environment with competing priorities

Nice to have

• Experience with or exposure to proprietary enterprise blockchain platforms
• Knowledge of Layer 2 scaling solutions (e.g. Polygon, Arbitrum, Optimism) and cross-chain interoperability protocols
• Familiarity with DeFi protocols and token standards (ERC-20, ERC-1400, ERC-3643)
• Experience in financial services, capital markets, or fintech environments
• Understanding of regulatory and compliance considerations relevant to blockchain deployments in financial services
• Knowledge of CI/CD pipelines, containerisation (Docker/Kubernetes), and cloud infrastructure
• Exposure to Agile and DevOps methodologies

What we offer

• Permanent full-time position
• Location options: Ipswich, London, or Remote

About Delta Capita

Delta Capita Group is a global managed services, consulting, and solutions provider combining expertise in Financial Services with technology innovation. The company delivers technology-based mutualized services for financial institutions.