Buscar empleo: 339 ofertas de trabajo de oracle en Córdoba (mayo 2026)

Blockchain & Smart Contract Engineer - córdoba

hace 1 día

Córdoba

About the role We are seeking a Senior Blockchain & Backend Engineer to help maintain and evolve Debita by Neitec, our on-chain asset-based private credit infrastructure. This role combines production smart contract engineering with backend integration work across Web3 infrastructure, payment rails, custody providers and off-chain financial systems. The ideal candidate has already deployed and maintained smart contracts handling real-world capital, understands the full lifecycle from testnet to mainnet, and is comfortable building the backend services required to connect on-chain financial logic with APIs, databases, wallets and settlement flows. Requirements • Fluent Spanish is required, as the role involves working closely with Spanish-speaking teams and stakeholders., • The candidate must be based in Spain, preferably in Madrid, or willing to work within the Spanish time zone. This is NOT a junior position. We need someone who has: • Deployed and maintained smart contracts handling real-world capital in production, • Experienced the full lifecycle of blockchain projects from testnet to mainnet, • Debugged critical production issues under pressure, • Made architectural decisions that impact security and scalability Key distinction: You'll split your time 50/50 between: • Smart Contracts & SDK Layer (EVM, Solidity, TypeScript SDK), • API Integration Layer (Backend services consuming Web3 infrastructure) Core responsibilities 1. Smart contract development & maintenance (50%) Production contract management • Maintain and upgrade existing bond issuance contracts, • Deploy new bond instances to mainnet following strict security protocols, • Monitor on-chain operations and respond to incidents, • Coordinate with auditors for security reviews before major upgrades Financial logic implementation • Implement complex amortization schedules (French, bullet, hybrid models), • Design settlement mechanisms (atomic on-chain vs hybrid off-chain), • Build compliance enforcement at the smart contract level (KYC/AML whitelisting), • Integrate with Chainlink Automation for scheduled operations (interest payments, redemptions) SDK development • Maintain TypeScript SDK used by API, • Generate and version ABIs, TypeChain bindings, and contract interfaces, • Write integration tests ensuring SDK behavior matches contract state, • Document breaking changes and coordinate releases with API team 1. Web3 API integration (50%) Backend services • Integrate SDK into NestJS API services, • Build reliable transaction management (nonce handling, gas estimation, retry logic), • Design off-chain balance registries synchronized with on-chain state Payment rails & custody integrations • Integrate with fiat on/off ramp providers (bank accounts, payment processors), • Connect payment rails: crypto transfers, SEPA, ACH and local payment methods, • Integrate with liquidity providers and custody solutions (MPC wallets, institutional custodians), • Build synchronization mechanisms between on-chain state and off-chain legacy systems, • Coordinate atomic or hybrid DVP (Delivery vs Payment) settlements across chains and rails, • Handle wallet management, signing flows, and key rotation strategies, • Implement transaction batching and gas optimization at API level Technical requirements Blockchain / Smart Contracts Production solidity experience • 2+ years writing production Solidity, • Deployed contracts managing real fundson mainnet, • Handled production incidents (reverted transactions, gas spikes, oracle failures), • Experience with upgradeable contracts (UUPS, Transparent, or Beacon proxies), • Deep understanding of EVM internals (storage layout, gas optimization, assembly when necessary) Concrete skills • Write gas-efficient Solidity following best practices, • Debug failed transactions using Tenderly, block explorers, or local forking, • Perform upgrades on live contracts without downtime or data loss, • Implement custom error handling, events, and role-based access control (OpenZeppelin), • Understand reentrancy risks, front-running, and common attack vectors Tools & frameworks • Foundry(primary) or Hardhat (legacy support), • OpenZeppelin Contracts (v5.x upgradeable suite), • Chainlink Automation (keeper-compatible contracts) Backend development TypeScript/Node.js • 3+ years building production Node.js services, • Experience with NestJS or similar enterprise frameworks, • Proficient in ethers.js v6 (contract interactions, wallet management, event parsing), • Async/await patterns, error handling, and retry mechanisms Database & state management • PostgreSQL for off-chain data (transactions, balances, audit logs), • Understanding of eventual consistency in blockchain-to-database sync, • Experience with migration scripts and schema versioning API design • RESTful API design for financial operations (idempotency, validation), • WebSocket streams for real-time blockchain events, • Rate limiting and authentication for sensitive endpoints, • Error handling that doesn't leak private keys or internal state Integration & traditional finance Bridge blockchain with legacy systems • Experience integrating blockchain with traditional banking/payment infrastructure, • Understanding of fiat on/off ramps(convert crypto fiat via bank accounts), • Knowledge of payment rails:SEPA (Europe), ACH (US), wire transfers, local payment methods (SPEI/Mexico, Pix/Brazil, FedNow, etc.), • Bank account integration experience (APIs for deposits, withdrawals, reconciliation), • Custody provider integrations (MPC wallets, institutional custodians, key management services), • Liquidity provider coordination (ensuring sufficient funds for settlements) On-Chain / Off-Chain state synchronization • Design systems that maintain consistency between blockchain state and database state, • Handle eventual consistency and reconciliation between on-chain events and off-chain records, • Build idempotent operations that can safely retry without double-spending or data corruption, • Monitor and alert on synchronization drift (on-chain balance ≠ database balance) Delivery vs Payment (DVP) coordination • Atomic DVP: On-chain smart contract settlement (payment + delivery in single transaction), • Hybrid DVP: Coordinate on-chain delivery with off-chain payment (via bank transfer, custody ledger), • Handle multi-leg settlement flows (bond issuance → fiat payment confirmation → token delivery), • Implement rollback/refund logic when one leg of DVP fails, • Experience with escrow mechanisms, multi-signature approvals, or atomic swaps Concrete skills • Integrate with payment processor APIs, • Handle currency conversion and multi-currency accounting, • Design webhooks and callbacks for asynchronous payment confirmation, • Understand regulatory requirements for AML/KYC in payment flows Financial protocols understanding Capital markets basics • Bond lifecycle: issuance → coupon payments → principal redemption → maturity/default, • Atomic DVP (fully on-chain: smart contract ensures simultaneous delivery + payment), • Hybrid DVP (on-chain delivery coordinated with off-chain payment via bank transfer or custody ledger), • Escrow and multi-signature approval flows, • Amortization schedules, • Roles management Tokenization concepts • Security token standards (ERC-20 with compliance hooks), • On-chain vs off-chain compliance (hybrid models), • Custodial vs non-custodial wallets in institutional context Nice-to-have experience Advanced blockchain • Multi-chain deployments (experience with 2+ EVM chains in production), • MEV awareness and mitigation strategies (private mempools, Flashbots), • Gas optimization at scale (batch operations, signature aggregation), • Experience with account abstraction (ERC-4337) or smart contract wallets Domain experience • Built or maintained aReal-World Asset (RWA) protocol, • Experience withSecurity Token standards (ERC-3643, ERC-1400), • Worked unregulated fintech (securities, payments, custody), • Integrated with institutional custody

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