PayPal Sr Staff Backend Developer – Cryptography 

Israel, Tel Aviv District, Tel Aviv-Yafo 

54366978

What you need to know about the role

Your day to day

In your day-to-day role, you will:

• Design, build, and maintain scalable and secure backend services and APIs.
• Develop, implement andmaintain cryptographicprotocols for key management and transaction signing.
• Participate in architecture and design discussions with a security-first mindset.
• Analyze, review, and improve the security of cryptographic code and systems.
• Support threat modeling, documentation, and external audits of cryptographic infrastructure.

What do you need to bring

• 5+ years of backend development experience with a strong foundation in computer science or cryptography.
• Strong background in Cryptography - Either relevant academic knowledge (Master’s or PhD) or relevant industry experience in the cryptography domain.
• Hands-on experience implementing cryptographic protocols (MPC preferred).
• Proficiency in at least one systems programming language (e.g., C++, Python, Rust, Go).
• Demonstrated knowledge of secure software development principles.
• Strong collaboration and communication skills in cross-functional teams.

Nice to have:

• Familiarity with blockchain protocols (e.g., Bitcoin, Ethereum, Solana) and institutional wallet practices.
• Familiarity with distributed systems and micro-services architecture.
• Contribution to open-source cryptographic or blockchain projects.

Our Benefits:

Any general requests for consideration of your skills, please