Senior Blockchain Engineer

Getmidas; Turkey; On-site; TRY 900,000 - 1,300,000; Full time

Job summary

Midas in Turkey is seeking a skilled blockchain engineer to design and operate secure production systems handling customer assets.

You will own on-prem custody architecture with HSM-backed key management, implement multi-chain RPCs, Solana and EVM networks, and collaborate with product, security, and engineering teams to deliver reliable financial infrastructure.

Qualifications

• Strong software engineering experience building and operating production systems in finance or digital assets.
• Experience with RPC integrations, node operations, indexers, and wallet custody systems.
• Experience designing or migrating on-premises custody infrastructure using HSMs.
• Knowledge of key lifecycle management, cryptographic signing, access controls, backups and disaster recovery.
• Experience across EVM-compatible and non-EVM networks (e.g., Solana).
• Experience developing and operating smart contracts; Solidity required; Rust or Solana helpful.
• Experience integrating DEXs, DeFi protocols, or on-chain financial workflows.
• Understanding of node synchronization, RPC reliability, transaction models, finality, and reorg handling.

Responsibilities

• Design and operate secure blockchain systems that handle customer assets.
• Own on-premises custody architecture, including HSM-backed key management, signing, access controls, 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, 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.

Skills

Blockchain systems engineering

RPC integrations

Node operations

Smart contracts (Solidity)

Solana development

EVM networks experience

HSM-based custody

Tools

HSMs

Indexers

Transaction signing

Job description

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.

• 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

• 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