A proactive and self-driven mindset with a passion for cybersecurity. Nice-to-Have Skills : Experience with mobile application security (iOS/Android). Knowledge of blockchain and smartcontract security. Familiarity with AI/ML security challenges. Contributions to open-source security projects or bug bounty programs. Seniority level Mid-Senior level Employment type Contract Industries: Software More ❯
Watford, England, United Kingdom Hybrid / WFH Options
JR United Kingdom
clients team and help shape the future of technology through cutting-edge software solutions. Remote Role (UK/ROI eligibility required) What You'll Do: Develop smartcontracts and dApps on Ethereum-compatible platforms Dive into L2 architecture and scaling solutions like Rollups and sidechains Collaborate in Agile teams, contributing to coding, testing, and peer reviews Stay More ❯
London, England, United Kingdom Hybrid / WFH Options
Superland Inc
solutions. You will be responsible for designing, implementing, and supporting a distributed blockchain-based network. Key Responsibilities: • Design, develop, and test blockchain applications. • Create and maintain smartcontracts and blockchain protocols. • Collaborate with cross-functional teams to define, design, and ship new features. • Ensure the performance, quality, and responsiveness of applications. • Identify and correct bottlenecks and fix More ❯
Cambridge, Cambridgeshire, United Kingdom Hybrid / WFH Options
Technical Futures Ltd
Designing with a bigger picture in mind i.e. relating to consequences of decisions. What the Security Software Engineer/Cryptographer will be involved with: Reviewing complex, high assurance smartcontract code. Applying your engineering skills to build custom tools to rapidly assess, explore or secure the code. Advising clients to make informed decisions about risk to their financial More ❯
Employment Type: Permanent
Salary: £50000 - £70000/annum Dep on Exp + Hybrid + Bonus
Cambridge, Cambridgeshire, East Anglia, United Kingdom Hybrid / WFH Options
Technical Futures
Designing with a bigger picture in mind i.e. relating to consequences of decisions. What the Security Software Engineer/Cryptographer will be involved with: Reviewing complex, high assurance smartcontract code. Applying your engineering skills to build custom tools to rapidly assess, explore or secure the code. Advising clients to make informed decisions about risk to their financial More ❯
London, England, United Kingdom Hybrid / WFH Options
Parity Technologies Limited
Substrate based blockchains such as Polkadot. Some examples of the projects you're likely to contribute to: EVM compatibility : Tests and benchmarks to ensure EVM compatibility and provide smartcontract performance data on our Asset Hub chain. substrate-connect-wallet : A wallet written in TypeScript directly connected to a light-client for Substrate chains. substrate-api-sidecar : A … the problems that the ecosystem faces and how we can help to solve them. Have prior experience or interest in working with the EVM and deploying/running smart contracts. Have demonstrable experience in TypeScript, in particular open source projects, and keen to grow and improve in this area. Take an interest in the Rust programming language, its More ❯
London, England, United Kingdom Hybrid / WFH Options
Technical Futures Ltd
of programming language theory. Designing with a bigger picture in mind i.e. relating to consequences of decisions. What the Cryptographer will be involved with: Reviewing complex, high assurance smartcontract code. Applying your engineering skills to build custom tools to rapidly assess, explore or secure the code. Advising clients to make informed decisions about risk to their financial More ❯
strategies, MEV Self-directed, highly accountable, and operationally disciplined Nice to Have Experience collaborating with engineering teams on trading infrastructure Experience with Solidity or interacting with smartcontracts directly Familiarity with perpetual decentralized exchange protocols Background in market microstructure or HFT Track open interest, perp skew, rate differentials, and L2 flows to anticipate structural shifts Familiarity with More ❯
strategies, MEV Self-directed, highly accountable, and operationally disciplined Nice to Have Experience collaborating with engineering teams on trading infrastructure Experience with Solidity or interacting with smartcontracts directly Familiarity with perpetual decentralized exchange protocols Background in market microstructure or HFT Track open interest, perp skew, rate differentials, and L2 flows to anticipate structural shifts Familiarity with More ❯
strategies, MEV Self-directed, highly accountable, and operationally disciplined Nice to Have Experience collaborating with engineering teams on trading infrastructure Experience with Solidity or interacting with smartcontracts directly Familiarity with perpetual decentralized exchange protocols Background in market microstructure or HFT Track open interest, perp skew, rate differentials, and L2 flows to anticipate structural shifts Familiarity with More ❯
strategies, MEV Self-directed, highly accountable, and operationally disciplined Nice to Have Experience collaborating with engineering teams on trading infrastructure Experience with Solidity or interacting with smartcontracts directly Familiarity with perpetual decentralized exchange protocols Background in market microstructure or HFT Track open interest, perp skew, rate differentials, and L2 flows to anticipate structural shifts Familiarity with More ❯
london (city of london), south east england, united kingdom
Trireme
strategies, MEV Self-directed, highly accountable, and operationally disciplined Nice to Have Experience collaborating with engineering teams on trading infrastructure Experience with Solidity or interacting with smartcontracts directly Familiarity with perpetual decentralized exchange protocols Background in market microstructure or HFT Track open interest, perp skew, rate differentials, and L2 flows to anticipate structural shifts Familiarity with More ❯
strategies, MEV Self-directed, highly accountable, and operationally disciplined Nice to Have Experience collaborating with engineering teams on trading infrastructure Experience with Solidity or interacting with smartcontracts directly Familiarity with perpetual decentralized exchange protocols Background in market microstructure or HFT Track open interest, perp skew, rate differentials, and L2 flows to anticipate structural shifts Familiarity with More ❯
knowledge. Now, we're building a first of its kind Layer 2 with private smart contracts. This requires new cryptographic primitives, a zero-knowledge DSL for writing contracts, a privacy-friendly execution environment, a carefully designed set of circuits that prove the validity of the chain to L1, a decentralized block-building and proving mechanism, and a More ❯
big-picture thinking Proficiency in unit and functional testing Excellent communication skills Experience with peer-to-peer systems and networking architectures Experience with distributed ledgers and smartcontracts Strong understanding of cryptographic principles Experience implementing security best practices Experience with Event Sourcing, CEP, and CQRS Experience with protocols like RAFT, BFT, Gossiping, DHT, CRDT Experience with databases More ❯
London, England, United Kingdom Hybrid / WFH Options
Mysten Labs
Labs’ web3 landscape to meet the growing demands of the ecosystem. What You’ll Do: Design, implement, and maintain Walrus core, including storage node, client software, smartcontracts and toolchains that power Walrus and its infrastructure. Work closely with the research, cryptography, production, security teams, and Sui core teams, to keep the Walrus network secure, performant, and More ❯
finance, gaming, NFTs, and other major verticals. Our team of experienced product managers, designers, and engineers work together to create innovative products and services that enable smartcontracts to securely access off-chain data and systems. With a focus on user-centered design, we strive to create intuitive and seamless experiences for developers and end-users alike. More ❯
London, England, United Kingdom Hybrid / WFH Options
Prism Digital
interim CTO is keen to hear your recommendation(s) on tooling and implementation strategy. Disaster recovery and security tooling – ensure platform resilience and safe deployment of backend and smartcontract code. Event-driven architecture – where you will be building, supporting and running scalable systems that can handle millions of users per day. You will be the sole DevOps More ❯
London, England, United Kingdom Hybrid / WFH Options
trilitech
a senior leader within our growing business reporting to the Head of Engineering. The Developer Relations team work across the following broad goals; Develop apps and smartcontracts so new developers can easily onboard with. Provide them with tools so they are set up for success. Directly own and drive developer adoption of Tezos and set strategy More ❯
rollups, bridging, transaction lifecycle, user experience tradeoffs. Familiarity with a wide array of EVM infrastructure projects (bridges, node providers, tooling, automation, oracles, auditors ) Proven experience reviewing smartcontracts in a production-grade DeFi context. Familiarity with Solidity and the EVM developer ecosystem (Hardhat, Foundry, OpenZeppelin) Humility and strong ability to communicate technical concepts to both devs and More ❯
a Backend Blockchain Engineer to join their growing London-based team. Responsibilities Building and enhancing the software that interacts directly with native crypto assets, DeFi protocols, tokens, and smart contracts. Working across multiple blockchains and decentralized networks, expect variety! Expanding the functionality of existing systems and writing robust, maintainable tests. Taking ownership within a large, complex codebase and More ❯
future finance team! What you should expect: A collaborative office environment with pairing and social activities. Work across the stack, from core Java components to financial products using smart contracts. Opportunities for learning through tech talks, conferences, and personal development time. What you’ll be working with: Backend: Distributed, event-driven core Java 21 (80%), MySQL, Kafka, Solidity More ❯
the Defi-focused engineering build and help shape the architectural vision of this dynamic bank's blockchain-related infrastructure. Design and implement secure wallet systems Build smartcontracts and DeFi tooling from the ground up Develop interoperable cross-chain and L2 solutions Engineer tokenisation systems for banking infrastructure Collaborate with key teams for enterprise crypto services Key … Responsibilities: Develop reliable, high-performance blockchain systems Design wallet, smartcontract, and cross-chain solutions Guide node architecture and ledger design Advise on blockchain trends and DeFi ecosystems The Candidate We're seeking a proven Engineering leader with strong DeFi, Stablecoin, and (ideally) banking/fintech exposure. You will have a background of 0-1 build out and … deep blockchain experience. 10+ years in software & blockchain architecture Deep knowledge of EVM, Rust Smart-Contract build. A background in building Crosschain, Sablecoin, wallets, and DeFi products Experience with production-grade blockchain design Expertise in blockchain security and performance Strong cross-team collaboration skills and leadership skills The Reward This is an amazing opportunity to join a forward More ❯
the Defi-focused engineering build and help shape the architectural vision of this dynamic bank's blockchain-related infrastructure. Design and implement secure wallet systems Build smartcontracts and DeFi tooling from the ground up Develop interoperable cross-chain and L2 solutions Engineer tokenisation systems for banking infrastructure Collaborate with key teams for enterprise crypto services Key … Responsibilities: Develop reliable, high-performance blockchain systems Design wallet, smartcontract, and cross-chain solutions Guide node architecture and ledger design Advise on blockchain trends and DeFi ecosystems The Candidate We're seeking a proven Engineering leader with strong DeFi, Stablecoin, and (ideally) banking/fintech exposure. You will have a background of 0-1 build out and … deep blockchain experience. 10+ years in software & blockchain architecture Deep knowledge of EVM, Rust Smart-Contract build. A background in building Crosschain, Sablecoin, wallets, and DeFi products Experience with production-grade blockchain design Expertise in blockchain security and performance Strong cross-team collaboration skills and leadership skills The Reward This is an amazing opportunity to join a forward More ❯
the Defi-focused engineering build and help shape the architectural vision of this dynamic bank's blockchain-related infrastructure. Design and implement secure wallet systems Build smartcontracts and DeFi tooling from the ground up Develop interoperable cross-chain and L2 solutions Engineer tokenisation systems for banking infrastructure Collaborate with key teams for enterprise crypto services Key … Responsibilities: Develop reliable, high-performance blockchain systems Design wallet, smartcontract, and cross-chain solutions Guide node architecture and ledger design Advise on blockchain trends and DeFi ecosystems The Candidate We're seeking a proven Engineering leader with strong DeFi, Stablecoin, and (ideally) banking/fintech exposure. You will have a background of 0-1 build out and … deep blockchain experience. 10+ years in software & blockchain architecture Deep knowledge of EVM, Rust Smart-Contract build. A background in building Crosschain, Sablecoin, wallets, and DeFi products Experience with production-grade blockchain design Expertise in blockchain security and performance Strong cross-team collaboration skills and leadership skills The Reward This is an amazing opportunity to join a forward More ❯