Job Description

About the Role

We are looking for a Blockchain Security Development Engineer to join a growing global digital-asset and blockchain technology organization.

This role focuses on building and securing multi-chain wallet infrastructure, transaction processing, cryptographic signing, and blockchain integrations across multiple blockchain ecosystems. You will work on security-critical components where a strong understanding of blockchain architecture, transaction execution, cryptography, and common attack vectors is essential.

The ideal candidate is an experienced blockchain developer with a strong security mindset and hands-on experience working across multiple blockchain architectures.

What You’ll Do

• Design and implement secure wallet solutions supporting multiple blockchain networks, including:
  • Bitcoin
  • Solana
  • EVM-based chains
  • Move-based chains
  • Cosmos-based chains
• Develop secure transaction generation, signing, and verification mechanisms across different blockchain architectures.
• Work with cryptographic signature schemes such as ECDSA, Ed25519, and related algorithms.
• Integrate and maintain multi-chain blockchain protocols, developing a deep understanding of:
  • Transaction structures
  • Transaction execution processes
  • Smart contract interactions
  • Chain-specific security considerations
• Participate in security audits, vulnerability identification, and remediation activities.
• Research blockchain security incidents and emerging attack techniques, and continuously improve security controls and defensive mechanisms.
• Analyze blockchain architectures and identify potential security weaknesses across transaction and wallet flows.
• Collaborate with engineering teams to ensure blockchain integrations are secure, reliable, and maintainable.
• Produce high-quality technical designs, architecture documents, and technical documentation.
• Contribute to security-focused engineering practices and maintain high standards for code quality and security.

What You’ll Need

• 5+ years of software development experience, with at least 3 years of hands-on blockchain development experience.
• Strong proficiency in at least one mainstream programming language, with the ability to quickly learn new technologies and blockchain architectures.
• Strong technical understanding of multiple blockchain ecosystems, particularly:
• Bitcoin
• Solana
• EVM-based blockchains
• Move-based blockchains
• Cosmos-based blockchains
• Strong awareness of blockchain and application security.
• Familiarity with common blockchain attack vectors, vulnerabilities, and corresponding prevention or mitigation techniques.
• Solid understanding of cryptography fundamentals, including asymmetric cryptography and digital signature algorithms.
• Ability to understand complex blockchain protocols and translate technical knowledge into secure production implementations.
• Strong technical documentation and communication skills.

Nice to Have

• Experience launching production blockchain or wallet products.
• Open-source blockchain or security-related projects that can be shared as examples of technical work.
• Deep technical research or hands-on experience across multiple blockchain architectures.
• Contributions to open-source blockchain projects.
• Experience participating in blockchain security audits, vulnerability assessments, or security reviews.
• Experience investigating or responding to real-world blockchain security incidents.
• Experience working on security-critical wallet, custody, transaction infrastructure, or blockchain infrastructure.

What We Offer

• Opportunity to work on large-scale blockchain and digital-asset infrastructure.
• Exposure to multiple blockchain ecosystems and security-critical technologies.
• International and highly collaborative engineering environment.
• Opportunity to work on technically challenging problems involving blockchain security, cryptography, wallets, and multi-chain infrastructure.
• Competitive compensation and benefits.
• Opportunity to contribute to the development of products operating within the rapidly evolving digital-asset ecosystem.