Senior Blockchain Engineer

This is a remote position.Our client is building the infrastructure that enables humanitarian organizations to use stablecoins without requiring blockchain expertise.Rather than building another wallet or payment application, we're creating an orchestration layer that connects donors, NGOs, compliance providers, blockchain networks, regulated financial institutions, and local payout providers through a single API.Blockchain is the infrastructure—not the product.Our platform orchestrates the complete payment workflow, including: Funding and treasury management Compliance and sanctions screening On-chain transactions Reporting and audit trails Beneficiary payouts Local off-ramp integrations We integrate best-in-class providers for custody, compliance, blockchain connectivity, and financial settlement instead of replacing existing financial infrastructure.About the EngagementThis role begins as a project-based contract focused on delivering key milestones for an upcoming pilot.The initial engagement is deliverables-based, with clearly defined objectives and timelines. Upon successful completion of the pilot and continued platform growth, there is a strong opportunity to transition into a long-term full-time engineering role.You'll work directly with the founding team and Technical Lead, helping shape the architecture and technical direction of the platform.Where the Platform StandsOur MVP is approximately 80% complete.Already Live NGO onboarding and authentication Wallet connectivity Stablecoin payment initiation Compliance screening On-chain transaction execution Current Technology StackFrontend Next.js React TypeScript Vercel Backend Node.js Supabase PostgreSQL Blockchain WalletConnect USDC Arbitrum Base Note: The pilot network may transition to Stellar, so experience with both EVM and non-EVM ecosystems is highly valuable.What You'll DeliverDuring the pilot engagement, you'll be responsible for taking the platform from MVP to production.Production Readiness Production hardening and infrastructure improvements Encryption at rest and in transit Role-Based Access Control (RBAC) Comprehensive audit logging Security reviews and penetration testing Platform DevelopmentBuild and complete several core platform components, including: Off-chain audit records Donor reporting dashboard Treasury workflows Local off-ramp integrations Payment orchestration APIs Blockchain Engineering Develop and integrate secure smart contracts using audited standards such as OpenZeppelin Expand the chain abstraction layer across: Ethereum Stellar Arbitrum Base Tempo Support both EVM and non-EVM blockchain ecosystems Transaction SecurityDesign and implement: Transaction approval workflows Operational guardrails Secure wallet interactions Risk controls Blockchain transaction monitoring (e.g., Chainalysis or similar) RequirementsWe're looking for a senior engineer with hands-on production experience building blockchain-enabled applications.Strong experience with Node.js TypeScript REST APIs Next.js React Blockchain Ethereum Smart contract development Multi-chain applications EVM ecosystems Wallet infrastructure WalletConnect RPC providers such as Alchemy or QuickNode SecurityExperience implementing: Encryption RBAC Audit logging Secure key management Production-grade security practices LanguageProfessional working proficiency in Arabic for collaboration with partners and stakeholders across Arabic-speaking operating regions. Originally posted on Himalayas