Smart Contract Developer - LondonReference Code: 479134-en_GBContract Type:PermanentProfessional Communities: Products & Systems EngineeringJob Role: Senior DLT / Smart Contract Engineering Lead (Capital Markets & Banking)Role Summary:Lead the design and delivery of enterprise-grade blockchain solutions within regulated financial environments. This role focuses on smart contract engineering, tokenized securities, digital cash integration, and secure, compliant DLT platforms for capital markets, payments, and settlement systems.Hybrid working:The places that you work from day to day will vary according to your role, your needs, and those of the business; it will be a blend of Company offices, client sites, and your home; noting that you will be unable to work at home 100% of the timeJob Role:Blockchain & Solution DeliveryDesign and implement distributed ledger solutions for:Capital marketsPaymentsCustody and settlement systemsDeliver production-grade blockchain systems for:BanksFinancial Market Infrastructures (FMIs)Exchanges and regulated fintechsIntegrate on-chain logic with off-chain enterprise systems:Core banking platformsCentral Securities Depositories (CSDs)Payment railsRegulatory reporting systemsSmart Contract EngineeringDevelop, test, audit, and deploy secure Solidity-based smart contractsImplement advanced contract logic for:Asset issuance, transfer, and redemptionLifecycle event managementSettlement workflows (DvP, escrow, atomic swaps)Design and implement:Token standards (fungible, NFT, hybrid securities)Gas-optimized smart contract architecturesUpgradeable contract patternsTokenisation & Digital CashBuild and manage tokenisation frameworks for:Securities and financial instrumentsTokenized assets across lifecycle stagesWork with digital cash instruments:StablecoinsTokenized bank depositsOn-chain cash leg representations for DvPEnsure compliance with regulatory requirements for on-chain financial productsBlockchain Platforms & StandardsWork across both public and permissioned DLT platforms:EthereumHyperledger BesuCordaApply enterprise blockchain standards for:PrivacyInteroperabilityTokenized securities marketsSecurity, Custody & CryptographyEnsure secure smart contract design by addressing:Reentrancy attacksAccess control vulnerabilitiesPrecision/overflow issuesDesign custody and wallet solutions using:MPC (Multi-Party Computation)HSM-backed signingPolicy-based wallet controlsImplement privacy-preserving mechanisms:Permissioned access modelsSelective disclosureZero-knowledge proof (ZKP) conceptsCloud, DevOps & Engineering ExcellenceBuild and deploy cloud-native applications on:AWS, Azure, or GCPOperate containerized systems using:KubernetesMicroservices architecturesImplement DevSecOps practices:CI/CD pipelines for smart contracts and backend servicesAutomated testing and security scanningInfrastructure as Code (IaC)Ensure production reliability through:Monitoring (Prometheus, Grafana)Observability frameworksSecure secrets and key managementJob SkillsExperience12+ years of software engineering experience46+ years of hands-on smart contract developmentProven experience in regulated environments (banks, FMIs, exchanges, fintechs)Strong exposure to capital markets and post-trade systemsCore Technical SkillsSolidity smart contract development (advanced level)Ethereum, Hyperledger Besu, CordaToken standards (ERC-20, ERC-721, ERC-1155, hybrid models)Smart contract lifecycle managementFinancial Domain KnowledgeSecurities lifecycle managementClearing and settlement processesCorporate actions and custodyDelivery vs Payment (DvP) mechanismsSecurity & CryptographySmart contract security best practicesMPC, HSM, and wallet architectureZero-knowledge proofs (ZKP)Selective disclosure and privacy-preserving architecturesCloud & DevOpsAWS / Azure / GCPKubernetes and containerizationCI/CD pipelinesInfrastructure as CodeMonitoring tools (Prometheus, Grafana)System IntegrationCore banking integrationPayment systems and railsRegulatory reporting platformsHybrid on-chain/off-chain architectures.We are a Disability Confident Employer:Capgemini is proud to be aDisability Confident Employer (Level 2)under the UK Governments Disability Confident scheme.As part of our commitment to inclusive recruitment, we will offer an interview to all candidates who:Declare they have a disability, andMeet the minimum essential criteria for the role.Please opt in during the application process.Make It Real (what does it mean for you):Youd be joining an accredited Great Place to work for Wellbeing in 2024. Employee wellbeing is vitally important to us as an organisation. We see a healthy and happy workforce a critical component for us to achieve our organisational ambitions.To help support wellbeing we have trained Mental Health Champions across each of our business areas, and we have invested in wellbeing apps such as Thrive and Peppy.You will be empowered to explore, innovate, and progress. You will benefit from Capgeminis learning for life mindset, meaning you will have countless training and development opportunities from thinktanks to hackathons, and access to 250,000 courses with numerous external certifications from AWS, Microsoft, Harvard ManageMentor, Cybersecurity qualifications and much more.You will be joining one of the Worlds Most Ethical Companies, as recognised by Ethisphere for 13 consecutive years. We live our values by making ethical business choices every day. Working ethically is at the centre of our culture at Capgemini, meaning you will be helping to create a future we can all be proud of.Why you should consider Capgemini:Growing clients businesses while building a more sustainable, more inclusive future is a tough ask. When you join Capgemini, youll join a thriving company and become part of a collective of free-thinkers, entrepreneurs and industry experts. We find new ways technology can help us reimagine whats possible. Its why, together, we seek out opportunities that will transform the worlds leading businesses, and its how youll gain the experiences and connections you need to shape your future. By learning from each other every day, sharing knowledge, and always pushing yourself to do better, youll build the skills you want. Youll use your skills to help our clients leverage technology to innovate and grow their business. So, it might not always be easy, but making the world a better place rarely is.About Capgemini:Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organisations and make it real with AI, technology and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations. The Group reported 2024 global revenues of 22.1 billion.Make it real |www.capgemini.com