Cryptography Engineer – Fully Homomorphic Encryption (FHE)

Location: Remote (USA-based preferred)
Type: Full-Time
Clearance: Not required, but U.S. Citizenship or Permanent Residency may be needed for certain projects

About the Role

A growing technology company at the forefront of quantum-safe security and advanced cryptography is seeking a Cryptography Engineer with deep expertise in Fully Homomorphic Encryption (FHE). This is a unique opportunity to work on mission-critical technology that enables secure computation over encrypted data-unlocking transformative applications in data privacy, cloud security, and beyond.

You’ll join a multidisciplinary R&D team focused on designing and optimizing next-generation encryption protocols and libraries that are both performant and quantum-resilient.

Key Responsibilities

• Design, implement, and optimize FHE schemes, protocols, and supporting libraries

• Conduct applied research to evaluate the practicality and performance of FHE in real-world scenarios

• Collaborate with product, engineering, and cryptography teams to integrate FHE solutions into commercial-grade software

• Contribute to benchmarking, threat modeling, and performance tuning across a range of use cases

• Stay current with emerging trends in post-quantum cryptography and privacy-preserving computation

• Write high-quality, maintainable code in C/C++, Rust, or similar low-level languages

Required Skills & Experience

• Proven experience implementing or optimizing Fully Homomorphic Encryption (CKKS, BFV, TFHE, etc.)

• Strong foundation in applied cryptography, including lattice-based schemes

• Proficient in systems-level programming (C++, Rust, or equivalent)

• Solid understanding of performance tradeoffs in cryptographic algorithms

• Ability to read and implement academic papers and translate them into usable code

• Comfortable working in a research-driven, fast-moving environment

Preferred Qualifications

• Advanced degree (MSc, PhD) in Computer Science, Mathematics, Cryptography, or related field

• Experience with popular FHE libraries such as Microsoft SEAL, PALISADE, Concrete, or HElib

• Exposure to other privacy-preserving technologies (e.g., MPC, ZK, differential privacy)

• Background in secure systems architecture or cloud-based security models

• Published research or open-source contributions in cryptographic domains

Darwin Recruitment is acting as an Employment Agency in relation to this vacancy.

Reece Waldon