Blockchain Ops Engineer (Digital Assets)

Location: Istanbul, Turkey; hybrid schedule with office attendance at Vadistanbul two days per week during three weeks of each month and one fully remote week

Company

ING is an international banking organization with approximately 65,000 employees operating across about 40 countries, delivering technology platforms for digital transformation and financial services.

What you will do

• Design, implement, and secure digital asset technology capabilities for a regulated banking environment.
• Build and protect wallet infrastructure, key management, cryptographic controls, custody models, and secure signing components.
• Develop security approaches for smart contracts, transaction authorization, tokenization platforms, and blockchain integrations.
• Apply secure coding, threat modelling, vulnerability management, penetration testing, and security architecture practices.
• Collaborate with digital asset engineers, blockchain engineers, architects, cybersecurity, risk, compliance, legal, product, and global technology teams.
• Ensure platforms are resilient, auditable, compliant, and ready for production.

Requirements

• At least 5 years of experience in software engineering, solution design, or architecture.
• Strong experience in cybersecurity, secure software engineering, platform security, or cryptographic systems.
• Understanding of wallets, public/private key cryptography, digital signatures, transaction signing, smart contracts, tokens, blockchain nodes, and custody models.
• Familiarity with APIs, microservices, event-driven architecture, cloud platforms, containers, Kubernetes, CI/CD, infrastructure as code, IAM, secrets management, encryption, logging, monitoring, and audit trails.
• Bachelor’s degree in computer engineering, software engineering, or a related field, with strong stakeholder management, communication, analytical, and problem-solving skills.
• Fluent English communication at C1 level or above is required.

Nice to have

• Experience in banking, financial services, payments, capital markets, securities, custody, or wholesale banking.
• Experience with digital assets, tokenization, stablecoins, CBDCs, tokenized deposits, or blockchain-based settlement.
• Hands-on experience with HSMs, MPC platforms, wallet infrastructure, custody providers, or smart contract security tools.
• Knowledge of Ethereum, EVM chains, Hyperledger Besu, Hyperledger Fabric, Corda, Quorum, or permissioned blockchain networks.
• Security certifications or knowledge of ISO 27001, SOC 2, NIST, CIS, OWASP, and cloud security benchmarks.

Culture & Benefits

• Flexible hybrid working model with additional remote-working opportunities throughout August.
• Welcome leave, comprehensive health insurance, private pension plan, meal card, transportation allowance, and MultiSport membership.
• Training budget, Udemy partnership, English language development support, and continuous learning opportunities.
• Global mobility and international career opportunities.
• Innovation culture supported by the PACE methodology and regular communication activities.