Mirrai Careers

Senior Blockchain Engineer

Midas

Turkey Remote Full-time Posted 5d ago
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At Midas, we are working on real-life engineering challenges to transform the world of finance. We’ve transformed investing in Turkey by delivering a seamless experience for everyday investors. Today, 4 million users invest with Midas. Backed by an $80M Series B, the largest fintech investment ever in Turkey, we are scaling faster than ever. WHAT YOU'LL DO Design and operate secure blockchain systems that handle customer assets Own on-premises custody architecture, including HSM-backed key management, transaction signing, access controls, redundancy, backups, and disaster recovery Lead custody integrations and migrations while maintaining security and transaction continuity Develop, deploy, and maintain production-grade smart contracts and DEX integrations Build multi-chain transaction infrastructure across EVM-compatible networks, Solana, and other non-EVM ecosystems Build and operate RPC integrations, blockchain nodes, indexers, reorg-aware chain listeners, and on-chain data pipelines Own the transaction lifecycle from policy checks and signing through confirmation, reconciliation, and recovery Establish strong practices for observability, incident response, operational security, and failure recovery Work closely with product, security, and engineering teams to deliver reliable financial infrastructure WHAT YOU'LL BRING Strong software engineering experience building and operating critical production systems, ideally in financial services, digital assets, brokerage, or exchange environments Hands-on experience with RPC integrations, node operations, indexers, chain listeners, wallets, custody systems, and transaction signing Experience designing, operating, or migrating on-premises custody infrastructure using HSMs Strong knowledge of key lifecycle management, cryptographic signing, access controls, backup strategies, and disaster recovery Production experience across both EVM-compatible and non-EVM networks, ideally including Solana Experience developing and operating smart contracts; strong Solidity knowledge is expected, while Rust or Solana development experience is valuable Experience integrating DEXs, DeFi protocols, or other on-chain financial workflows Understanding of node synchronization, RPC reliability, transaction models, finality, reorg handling, backfills, fees, and network-specific failure scenarios Knowledge of distributed systems, asynchronous processing, idempotency, data consistency, and observability Ability to independently own complex, security-sensitive projects from design through production

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