Senior Backend Engineer (Web3)

TL;DR

Senior Backend Engineer (Web3/Cryptography): Building and optimizing high-assurance digital signing systems and distributed backend services for key management with an accent on cryptographic rigor, distributed reliability, and security. Focus on architecting key generation and storage, developing MPC-based signing protocols, and hardening systems against adversarial attack vectors.

Company

hirify.global provides a secure platform and network for companies to work with digital assets, trusted by major financial institutions, banks, and Web3 firms.

What you will do

• Architect, design, and implement distributed backend services for key generation, storage, and lifecycle management.
• Develop high-assurance signing protocols and flows utilizing MPC or external signing devices.
• Build secure backup and disaster recovery mechanisms for cryptographic material.
• Harden systems against adversarial conditions and real-world attack vectors.
• Optimize performance-critical components executing complex cryptographic operations.

Requirements

• 7+ years of strong backend experience in production systems.
• Experience building large-scale distributed systems (SaaS experience strongly preferred).
• Proficiency with distributed SQL databases.
• Experience with cloud technologies (Docker, K8S, AWS, Azure) and monitoring tools (DataDog, Prometheus).
• Deep understanding of concurrency, memory management, system design, and performance optimization.
• Strong security engineering mindset.

Nice to have

• Experience with TypeScript.
• Knowledge of cryptography, MPC, threshold signatures, or key management systems.
• Familiarity with blockchain technologies and confidential computing.
• Experience integrating with HSMs or secure enclaves.
• Background in highly security-sensitive environments.