10 of 10 Blockchain Engineer Jobs in the UK

Remote (Worldwide) • Contract • $50–150/hr We are building the first blockchain-based pet ecosystem in Brazil. 160M pets. $60B market. Zero blockchain infrastructure today. Web2 platform is 75% complete. Now building Web3 layer — pet NFTs, vaccine certificates, smart contract adoptions, on‐chain insurance. Open Roles Founding … Blockchain Engineer ($100–150/hr). Own Web3 architecture — smart contracts, API layer, data indexing, team leadership. Solidity Developer ($70–120/hr). Write & deploy ERC‐721/1155 contracts. Upgradeable patterns. Foundry/Hardhat. Senior Full‐Stack Developer ($70–100/hr). Web2 features ...

backbone of on-chain access for some of the world's largest financial institutions and crypto-native organizations. We operate at the intersection of blockchain protocol engineering and enterprise-grade reliability — designing systems that route, protect, and optimize transactions across dozens of chains at scale. You’ll work … decentralized networks every day. What You’ll Do Design and build robust, scalable backend services supporting high‐volume on‐chain transaction flows across multiple blockchain networks — both EVM and non‐EVM. Own end‐to‐end development of backend components and APIs — from architecture decisions to production deployment. Lead integrations ...

Chainalysis is seeking an engineer to design and evolve large-scale systems that ingest and process blockchain data. You will apply AI-native workflows to accelerate delivery while keeping code reliable and maintainable. You will bring deep blockchain protocol knowledge (EVM/UTXO) and collaborate with Product ...

Elliptic is seeking a Senior Software Engineer to join its Product-Engineering team, focusing on data engineering for blockchain analytics. You will design, build and ship the data platform, shaping technical direction to handle large-scale batch and streaming workloads while delivering customer value. The role emphasizes ...

Tether is building Hadron, an enterprise tokenization platform for regulated digital assets across blockchain networks. We seek a Senior Software Engineer to shape the core infrastructure, including tokenization engines, blockchain integrations, and compliance tooling for institutional clients worldwide. You will work on APIs for asset issuance, lifecycle ...

Chainlink Labs is seeking a Senior Software Engineer to advance the reliability, scalability, and operational excellence of the Chainlink Runtime Environment (CRE) platform. You will design and build distributed systems that enable resilient workflow execution and support growth of this flagship product. You will design, build, and operate scalable ...

Fireblocks is seeking a Backend/Full‐Stack Engineer to design and operate scalable backend services for high‐volume on‐chain transaction flows across multiple blockchain networks (EVM and non‐EVM). You will own APIs end‐to‐end, integrate with DeFi protocols, and collaborate with product … research teams to deliver secure, reliable systems. You have 7+ years of backend experience, blockchain/Web3 expertise, and strong knowledge of security principles. #J-18808-Ljbffr ...

Chainalysis is seeking a senior backend engineer to architect and evolve scalable systems for ingesting and parsing complex blockchain data. You’ll help push AI-native engineering workflows, leverage LLMs and automated agents to increase velocity, and provide blockchain protocol expertise to the team. Join a global ...

London Stock Exchange Group (LSEG) is seeking a Senior DevOps engineer to join the Technical Services team in London. You will own and operate CI/CD pipelines, design Kubernetes orchestrations, and deploy DMI applications in Azure, ensuring reliability and security. You will participate in on-call rotations, support ...

Anza seeks a Senior Software Engineer to fortify its Agave client and the Solana network, focusing on block production, scheduling, and verification. You will optimize the core pipeline between networking and runtime, ensuring secure, high-performance, scalable operations. Ideal candidates have 3+ years in infrastructure software and distributed systems ...