I

ING

Digital banking and sustainable lending

Blockchain Security Engineer

Full-TimeUpdated on 10/23/2026
No salary listed
Senior
Bachelor's
İstanbul, Türkiye
Hybrid
CybersecuritySecurity Engineering & Architecture

About the job

Requirements
  • A Bachelor's degree in Computer Engineering, Software Engineering, or a related discipline is required.
  • Fluent English communication skills at C1 level or above are required.
  • At least five years of professional software engineering experience is required.
  • Strong hands-on experience with Java is required; Java 17 or later is preferred.
  • Experience with Spring Boot and microservice architectures is required.
  • Strong knowledge of RESTful APIs and event-driven architectures is required.
  • A good understanding of Docker and Kubernetes is required.
Responsibilities
  • Design, develop, and maintain Java-based backend services supporting digital asset operations.
  • Build APIs and microservices for wallet administration, asset transfers, transaction signing, and custody workflows.
  • Develop integration components with blockchain SaaS vendors and custody providers.
  • Ensure high availability, scalability, and resilience of critical digital asset services.
  • Design secure key management processes across the entire key lifecycle.
  • Implement integrations with hardware security modules, vault solutions, and key custody platforms.
  • Support cryptographic operations, including transaction signing, encryption, and secure key storage.
  • Apply security-by-design principles throughout application development.
  • Conduct security reviews and threat modeling for new capabilities.
  • Design and implement wallet provisioning and lifecycle management capabilities.
  • Build and optimize custody workflows for institutional digital asset operations.
  • Support multi-signature and approval workflows.
  • Implement controls for segregation of duties and privileged access management.
  • Work closely with DevOps and Security Engineers to automate secure deployments.
  • Contribute to CI/CD pipelines and infrastructure-as-code initiatives.
  • Support operational readiness, monitoring, and security incident analysis.
  • Collaborate with architects, blockchain engineers, compliance specialists, and product stakeholders.
  • Participate in architecture reviews and security assessments.
  • Provide technical guidance on secure digital asset platform design.
Desired Qualifications
  • Experience with Multi-Party Computation custody solutions.
  • Experience integrating institutional custody providers.
  • Knowledge of blockchain security and smart contract risks.
  • Experience with cloud platforms; Azure is preferred.
  • Familiarity with ISO 27001, SOC 2, and financial security standards.
  • Experience working in Agile/Scrum environments.

About the company

ING provides digital banking and financial services to individuals and businesses worldwide. Its products and services include online and mobile banking, lending, payments, and advisory services designed to be frictionless so customers can make confident financial decisions. ING differentiates itself by focusing on sustainable choices, responsible lending, and sharing knowledge to help customers and partners realize their visions for a better future. The bank emphasizes empowerment over judgment and aims to finance change, partner with customers, and continuously innovate in a sustainable way. Its goal is to help people and businesses progress toward their goals while reducing barriers and making banking easier and more responsible.

Company Size

10,001+

Company Stage

IPO

Headquarters

Amsterdam, Netherlands

Founded

1991

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Simplify's Take

What believers are saying

  • On 21 September 2026, ING financed GridStor's $220 million Arizona battery project.
  • ING's Q2 2026 net core lending grew €15.2 billion and deposits €15.9 billion.
  • ING upgraded 2026 income guidance above €24.5 billion and kept a €1.0 billion buyback.

What critics are saying

  • On 5 May 2026, ING settled a Belgium money-laundering probe for €1.6 million.
  • ING announced 1,250 job cuts in March 2026, including 950 Dutch roles.
  • Repeated AML failures would trigger Dutch, Belgian, and ECB scrutiny, crushing ING's franchise.

What makes ING unique

  • ING mixes European retail deposits with global wholesale lending, funding large project finance.
  • On 30 July 2026, ING reported a 13.1% CET1 ratio and 17.0% ROTE.
  • ING mobilized €86.5 billion of sustainable finance in H1 2026, led by SLLs.

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Benefits

  • Health Insurance
  • 401(k) Retirement Plan
  • 401(k) Company Match
  • Paid Vacation
  • Flexible Work Hours
  • Hybrid Work Options
  • Family Planning Benefits
  • Fertility Treatment Support
  • Wellness Program
  • Mental Health Support
  • Phone/Internet Stipend
  • Home Office Stipend

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