Senior Blockchain Engineer - Node.js, Python, Ripple and crypto exchanges

Job Title: Senior Blockchain Engineer - Node.js, Python, Ripple and crypto exchangesLocation: Austin or Dallas - Texas (Onsite/ Hybrid 3 days)Employment Type: Contract/ CTHAbout Smart IT Frame:At Smart IT Frame, we connect top talent with leading organizations across the USA. With over a decade of staffing excellence, we specialize in IT, healthcare, and professional roles, empowering both clients and candidates to grow together.Role SummaryWe are seeking a highly skilled Senior Engineer – Blockchain Integration Platforms to build, integrate, and enhance the blockchain infrastructure that powers our digital asset custody and tokenization platforms. The ideal candidate will work closely with Crypto Custody Lead Engineers, Crypto Security Engineers, and platform engineering teamsRequired QualificationsBachelor's or Master's degree in Computer Science, Engineering, Information Technology, or a related field.7+ years of professional software engineering experience.Hands-on experience building or integrating blockchain or distributed ledger technologies.Strong understanding of Layer 1 blockchain protocols and transaction lifecycles.Experience designing and developing backend services, APIs, and infrastructure platforms.Strong programming expertise in one or more of the following:PythonNode.jsGoJavaRustExperience working in distributed, asynchronous, and event-driven architectures.Ability to collaborate effectively across platform, custody, and security teams.Preferred QualificationsExperience with blockchain indexers, explorers, and chain analytics platforms.Knowledge of wallet architecture and blockchain transaction signing workflows.Familiarity with digital asset custody platforms and security-sensitive financial systems.Experience with:IPFS (InterPlanetary File System)Ripple/XRP LedgerLaravel FrameworkStrong troubleshooting and debugging skills in distributed environments.Experience leveraging AI-assisted development tools and workflows.Knowledge of smart contract interactions and token standards.Mandatory SkillsIPFSLaravelNode.jsPythonRipple (XRP Ledger)Preferred SkillsEthereumBlockchain Indexing & AnalyticsWallet EngineeringSmart ContractsMPC & HSM IntegrationsDistributed SystemsREST APIs & MicroservicesGenAI-Assisted DevelopmentCross-Chain IntegrationMandatory Skills: IPFS, Laravel, Node.js, Python, Ripple (XRP Ledger).Experience Level: 9-15 Years