Cryptography Engineer
Sunscreen builds fully homomorphic encryption infrastructure and developer tools for privacy-preserving applications.
Maintainer signals as of 9/25/2026
Funding history
About Sunscreen
Sunscreen develops FHE-based developer infrastructure, including the Parasol LLVM-based compiler, virtual processor, TFHE library, and Secure Processing Framework (SPF). These tools allow developers to write programs in mainstream languages, compile them for encrypted computation, and deploy them on-chain or in web2 environments. SPF provides capabilities such as threshold decryption, access control, off-chain storage, and blockchain event handling. Sunscreen's demos and materials focus on private voting, auctions, dark pools, private information retrieval, prediction markets, and other privacy-preserving applications for blockchain, fintech, healthcare, government, and enterprise use cases.
Skills
About the Role
You will help build the core infrastructure of a new cryptographic system, implement cryptographic primitives such as zero-knowledge proofs and fully homomorphic encryption, and write robust security-first code for adversarial environments. You will study advances in cryptography, evaluate their applicability, collaborate with others, and explain complex technical issues to non-technical audiences.
Requirements
- Significant experience implementing cryptographic primitives
- Experience with efficient zero-knowledge proof systems
- Ability to write performant and modular code
- Comfort working with multiple programming languages
- Interest in learning new mathematics and cryptography
- Excellent communication skills
- Ability to explain complex technical issues to a non-technical audience
- Ability to collaborate with others
Responsibilities
- Build the core infrastructure of a new cryptographic system
- Implement cryptographic primitives including zero-knowledge proofs and fully homomorphic encryption
- Write robust security-first code for high-risk adversarial environments
- Stay current with advances in cryptography
- Determine the applicability of cryptographic advances to the system
- Present work at conferences
Benefits
- Remote-first working environment
- Unlimited paid time off
- Homecomings for in-person team gatherings
- Annual health and wellness budget
- Personal development budget
- Medical, dental, and vision insurance
- 401k plan with employer match
- 1:1 charity donation match
- Opportunity to travel to and present at conferences
- Significant equity