Java Backend Engineer – Wallet Security, Crypto

Posted 02 February 2026
Salary HKD80000 - HKD100000 per month
LocationHong Kong
Job type Permanent
Discipline Crypto & Blockchain
ReferenceBH-2700

Job description

🔒 Java Backend Engineer – Wallet Security, Crypto Industry 

Location: Flexible / Remote
Employment Type: Full-time

About the Role We’re looking for an experienced Java Backend Engineer to join our wallet security team. In this role, you will take ownership of the security architecture behind wallet systems, ensuring our blockchain products are robust, reliable, and safe. You’ll collaborate with top engineers to build scalable backend services and stay ahead of emerging blockchain security threats.

What You’ll Do
  1. Participate in wallet security design, including threat modeling, secure code review, and process optimization.
  2. Develop and enforce security standards and best practices, ensuring iterative development meets compliance and security requirements.
  3. Continuously monitor blockchain ecosystems for emerging security vulnerabilities and exploits.
  4. Learn and apply modern technologies such as Spring Boot, Spring Cloud, and Service Mesh frameworks.
  5. Research cutting-edge technologies including distributed systems, message middleware, and large-scale data stream/batch processing—and apply them to real-world blockchain scenarios.
What We’re Looking For
  1. Bachelor’s degree or above in Computer Science, Software Engineering, Blockchain, Cryptography, or related fields.
  2. Strong proficiency in Java development, object-oriented programming, data structures, and algorithms.
  3. Familiar with mainstream frameworks like Spring and MyBatis, and version control tools like Git/GitLab.
  4. Knowledge of MySQL, Elasticsearch, Redis, and experience with SQL optimization.
  5. Strong ability to adapt quickly, learn independently, and solve complex problems.
  6. Excellent communication skills, high sense of ownership, and team collaboration mindset.
Bonus Points
  • Previous experience in top-tier tech companies with full development lifecycle exposure.
  • Passionate about crypto and blockchain; solid understanding of wallet systems, cryptography, consensus mechanisms, and distributed architectures.
  • Comfortable using English as a working language in an international team.
Why Join Us
  • Work on high-impact blockchain security challenges.
  • Grow alongside world-class engineers and crypto experts.
  • Competitive compensation and flexible remote options.
  • Be part of shaping the future of secure digital assets.

Additional Information We regret that only shortlisted candidates will be contacted.

📩 Interested?
If you’re inspired by the challenge of building a world-class crypto brand with global influence, we’d love to hear from you.

Please connect or send your profile directly to jchan@captarpartners.com for a confidential discussion.