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Midas
Midas
51 – 200 Employees
Skilled Worker Visa SponsorConsultingFintechInsurance
Midas is a financial technology company building an accessible investment platform for people who want to manage a diversified portfolio from one mobile application. Users can trade across U.S. stock markets, Borsa Istanbul, cryptocurrencies, mutual funds, and gold certificates, with the ability to invest in well-known global and Turkish companies in smaller amounts. The platform also combines trading access with investor education and support, while its brokerage partnership is designed to operate within applicable regulatory frameworks. For candidates exploring fintech careers, Midas offers the opportunity to work on products that connect everyday users with a broad range of financial markets.
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Senior Blockchain Engineer – Turkey Remote

Build secure blockchain, wallet, and custody infrastructure for Midas, a Turkish investing fintech serving 4 million users. Own systems that support real-money transactions across on-chain and off-chain environments.

TRTürkiyeRemoteFull-timeSeniorEnglish RequiredBlockchain Engineer
Distributed SystemsSolidity

Description

  • Design and operate scalable, secure blockchain infrastructure for real users and real-money transactions.
  • Own the complete blockchain transaction lifecycle, from initiation and signing through execution, confirmation, reconciliation, and recovery.
  • Build and enhance wallet, custody, key-management, and transaction systems spanning on-chain and off-chain environments.
  • Create integrations across blockchain networks with differing architectures, consensus mechanisms, and transaction models.
  • Develop and integrate smart contracts, including those deployed in EVM-compatible ecosystems.
  • Deliver production-ready DeFi capabilities such as staking, liquidity pools, DEX integrations, and other on-chain financial workflows.
  • Manage complex blockchain systems end to end, covering security, resilience, observability, incident response, and operational excellence.
  • Set architectural direction across security, scalability, reliability, maintainability, and engineering velocity.
  • Assess technical risks and design systems that remain secure and recoverable during failures.
  • Partner with product, business, security, and engineering teams to turn ambiguous needs into durable technical solutions.
  • Facilitate technical discussions, design reviews, and architecture decisions.
  • Support engineers through technical mentoring, code reviews, feedback, and knowledge sharing.
  • Use modern engineering tools, including AI-assisted development, while upholding rigorous standards for code quality and security.

Requirements

  • Demonstrated software engineering experience designing and operating complex production systems.
  • Extensive practical experience building and running production-grade blockchain infrastructure.
  • Strong knowledge of blockchain architecture across ecosystems, including consensus mechanisms, transaction models, finality, reorganizations, fees, and network-specific behavior.
  • Experience working across multiple blockchain networks and protocol models rather than within only one ecosystem or virtual machine.
  • Thorough understanding of wallet architecture, custody models, key management, transaction signing, and blockchain transaction lifecycles.
  • Hands-on experience with hardware security modules and secure key-management infrastructure.
  • Experience with MPC custody systems or platforms such as Fireblocks is a significant advantage.
  • Strong grasp of cryptographic signing workflows, key protection, access controls, and production security boundaries.
  • Experience developing, deploying, and operating smart contracts; Solidity expertise is a significant advantage.
  • Experience with DeFi protocols or use cases including staking, liquidity pools, DEXs, or comparable on-chain financial systems.
  • Strong understanding of on-chain and off-chain architectures, including their respective trade-offs.
  • Solid knowledge of distributed systems, asynchronous processing, idempotency, failure recovery, and data consistency.
  • Experience operating critical production systems with monitoring, alerting, observability, incident response, and post-incident improvement processes.
  • Ability to make well-reasoned architectural decisions and evaluate trade-offs involving security, scalability, reliability, operational complexity, and delivery speed.
  • Ability to independently solve ambiguous problems and take them from initial concept to production.
  • Strong ownership, accountability, and responsibility for production results.
  • Clear communication skills and the ability to influence technical decisions across teams.
  • Willingness to mentor engineers and raise the team’s technical standards.
  • Ability to use AI-assisted development tools effectively while applying sound engineering judgment and security practices.

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