Senior Blockchain Engineer

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