Head of Cryptographic Architecture / Senior Cryptographic Engineer
Primary stack
Job description
About the Position
Stand with Ukraine. Boosty is already actively helping Ukraine. Support our initiative
Join our client to build an internal institutional wallet platform for custodial operations across Bitcoin, Ethereum, Solana, and TRON. The platform unifies wallet management, transaction construction and signing, policy & governance, and execution workflows into a single in-house solution, replacing multiple vendor-specific custody and wallet systems.
You’ll work on secure wallet infrastructure, transaction signing, HSM integrations, and cryptographic services, helping shape the next generation of institutional digital asset custody.
Responsibilities
- Design and develop institutional-grade HSM-based wallet infrastructure.
- Build secure transaction signing services using HSMs.
- Design cryptographic architecture and wallet security models.
- Implement and optimize PKCS#11 integrations with enterprise HSMs.
- Support production systems, monitoring, troubleshooting, and incident resolution.
- Collaborate with engineering teams on blockchain integrations and wallet architecture.
- Provide technical guidance on cryptographic best practices and secure coding.
- Research and evaluate new cryptographic technologies, MPC, and emerging wallet architectures.
Requirements
- Strong Rust development experience.
- Deep knowledge of cryptography and secure software engineering.
- Experience with HSMs (Thales, IBM, Utimaco, Securosys, or Cloud HSMs).
- Experience building or designing blockchain wallet infrastructure.
- Understanding of Bitcoin, Ethereum, Solana, or other public blockchains.
- Experience with transaction signing (ECDSA, EdDSA, Schnorr).
- Knowledge of PKCS#11.
- Experience with Git/GitHub and secure development practices.
- Degree in Computer Science, Engineering, Cryptography, or a related field.
Nice to Have
- MPC wallet experience.
- Kubernetes, CI/CD, GitOps.
- Azure or cloud infrastructure experience.
- Knowledge of staking, DeFi, CeFi, and institutional digital asset products.
- Familiarity with post-quantum cryptography (PQ) and modern custody architectures.
We Offer
- Remote working format
- Flexible working hours
- Informal and friendly atmosphere
- The ability to focus on your work: a lack of bureaucracy and micromanagement
- 20 paid vacation days
- 7 paid sick leaves
- Education reimbursement
- Free English classes
- Psychologist consultations
Recruitment Process
- Recruitment Interview
- Technical Interview
- Client Interview
Have some questions?
Contact Anastasiia Lesechko, Technical recruiter
Join our team!
Tell a bit about yourself and why you would like to join us, share your CV and portfolio (if needed) with us
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Boosty Labs is a trusted blockchain development partner for over 150 clients worldwide including industry leaders and Fortune 500 companies.Founded by a true blockchain pioneer who has been advocating for Bitcoin since 2012 and co-launched Ukraine’s first blockchain conference, we’ve grown into one of the leading blockchain development teams with over 150 talented professionals.What makes us different? We’re truly remote-first, with team members across 15+ countries. We believe in trust over micromanagement, healthy work-life balance, and clear boundaries that let everyone do their best work.Our approach has attracted some amazing partners — we’ve worked with industry leaders like Ledger, Consensys, Coinbase, Filecoin Foundation, Storj, Near Protocol, and McKinsey. Together, we’ve delivered over 500 successful projects for more than 100 clients worldwide.Our technical expertise spans Golang, Rust, Solidity, Javascript, Typescript, Python, Node.js, React.js, Vue.js, Flutter, Swift, and Kotlin — everything needed to build robust blockchain and fintech solutions from the ground up.At Boosty Labs, you will:— Collaborate with passionate experts driving industry innovation— Take on challenging projects that push boundaries— Enjoy the flexibility of remote work with a global team— Grow professionally in a supportive environment that values work-life balanceWant to see more about life at Boosty Labs? Check us out on Instagram:www.instagram.com/boostylabsWe’re always looking for talented people who share our enthusiasm for innovation and want to make an impact in Web3. Whether you’re a blockchain veteran or an experienced engineer ready to enter the space, we’d love to talk.
