Backend Engineer: Blockchain Security & Custody

ING Hubs B.V. Turkiye

Fatih

Hybrid

TRY 350,000 - 550,000

Full time

6 days ago

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Benefits offered by this job

Welcome Leave 14 days

Flexible hybrid working model

Remote opportunities in August

Training budget & Udemy partnership

Global mobility opportunities

Health insurance

Job summary

ING Hubs Türkiye is seeking a highly experienced Blockchain Backend Security Engineer to design and scale secure custody, wallet management, and blockchain SaaS integrations for digital assets. You will drive secure key lifecycle management and integration with custody providers, while ensuring enterprise-grade security controls across the platform.

The role focuses on backend Java services, microservices architecture, and secure integrations, in a hybrid work model with global collaboration.

Qualifications

Bachelor's degree in Computer Engineering, Software Engineering, or a related discipline.
5+ years of professional software engineering experience.
Strong hands-on experience with Java (Java17+ preferred).
Experience with Spring Boot and microservice architectures.
Strong knowledge of RESTful APIs and event-driven architectures.
Good understanding of container technologies (Docker, Kubernetes).

Responsibilities

Backend Engineering: design, develop and maintain Java-based backend services supporting digital asset operations.
Build APIs and microservices for wallet administration, asset transfers, and custody workflows.
Develop integration components with blockchain SaaS vendors and custody providers.
Ensure high availability, scalability and resilience of critical digital asset services.
Security & Cryptography: design secure key management processes across the entire key lifecycle.
Implement integrations with HSMs, vault solutions and key custody platforms.