Wallet Security Engineer
Bithumb helps users trade cryptocurrencies with Korean won through a centralized spot exchange with staking and lending services.
Funding history
Investors
About Bithumb
Bithumb is a cryptocurrency exchange platform serving South Korean and international traders with spot trading across multiple digital assets paired primarily with Korean Won. The platform provides trading tools including automated bots and API access, alongside payment services through Bithumb Cash that enable cryptocurrency transactions at retail merchants and e-commerce platforms. Users can generate passive income through staking programs and a coin rental service. Originally launched as Xcoin in 2014 and rebranded to Bithumb in 2015, the exchange operates as a licensed Virtual Asset Service Provider under South Korean financial regulators.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will design and enhance the architecture of cold, hot, and warm wallets, develop private-key management systems, and improve architectures using technologies such as HSM and MPC. You will automate wallet security policies, build threat-monitoring systems, lead incident response, and review blockchain integrations and wallet logic for vulnerabilities.
Requirements
- Deep understanding of cryptography, including symmetric and asymmetric keys, hashes, and digital signatures, and key-management principles
- Experience leading the design of security architectures for systems with high security requirements
- Proficiency in at least one of Python, Go, Java/Kotlin, or Rust, with the ability to develop security solutions and systems
- Practical experience applying Secure SDLC and threat modeling
- Experience designing fintech or custody-solution security architectures and developing related systems is preferred
- Experience developing or operating HSM- or MPC-based systems is preferred
- Experience implementing and automating wallet and key-management policies through Policy as Code is preferred
- Experience analyzing vulnerabilities from an attacker’s perspective and designing or validating proactive defenses is preferred
- A master's degree or higher in computer engineering, cryptography, information security, or a related field is preferred
- Knowledge of and experience applying Zero Trust principles is preferred
Responsibilities
- Design and enhance cold, hot, and warm wallet architecture
- Lead the wallet security level and respond to evolving threats
- Design and develop private-key management systems
- Improve architecture and research new security technologies using HSM and MPC
- Establish procedural security for key management and wallet operations
- Automate and validate security policies through Policy as Code
- Model threats to wallet systems and interfaces
- Build security-monitoring systems to detect and respond to anomalies
- Lead responses to security incidents
- Review blockchain integrations and wallet logic for vulnerabilities
- Propose technical solutions and participate in code improvements
Benefits
- Overtime pay calculated by the minute
- Flexible staggered working hours
- Welfare points
- Commuting transportation support for night and holiday work
- Breakfast, lunch, and dinner provided or subsidized
- Unlimited snacks and beverages
- Housing purchase, rental-loan interest, or rent support
- Childcare cost support for preschool children
- Holiday and Parents' Day gifts
- Premium health checkups for employees and family members
- Group accident insurance
- Internal club activity support
- Resort and condominium accommodation support
