We're looking for a Senior Back-end Engineer with a strong background in security to help build a next-generation confidential computing system from the ground up.You'll design cryptographic infrastructure, develop Back-end services and APIs, and shape the core platform architecture. Working with HSMs, TEEs, and enterprise-grade cryptography, you'll operate at the intersection of Back-end engineering and cybersecurity.If you're eager to build secure, high-performance systems that redefine data protection, join us to shape the future of confidential computingCUSTOMEROur Сustomer is at the forefront of AI and high-performance computing, building next-generation GPU infrastructure to power advanced AI/ML workloads, data analytics, and research.Their team has decades of hands-on experience with high-performance distributed systems, ranging from creating early distributed clusters at NASA to scaling infrastructure for global leaders such as Google, Microsoft, CoreWeave, and Yahoo/AOL. They know the challenges developers face because they've experienced them, and they're determined to improve the situation.PROJECTToday, they're redefining AI infrastructure by putting control and efficiency back into the hands of developers. With the latest GPUs, exceptional reliability, and transparent, fair pricing, they're making powerful AI more accessible and enjoyable to use.Their mission is simple yet bold: great AI developers deserve great AI infrastructure. By empowering creators with the necessary tools, they're paving the way for real breakthroughs in artificial intelligence, and they're just getting started.Job DescriptionDesign and build high-performance, secure Back-end services for our vault and key management infrastructureDevelop cryptographic workflows, including key generation, rotation, and secure storage mechanismsBuild robust APIs with comprehensive authentication, authorization, and rate limitingWrite clean, maintainable, and well-tested code with security as a primary considerationImplement comprehensive audit logging and monitoring for security-critical operationsCollaborate with the security team on threat modeling and security reviewsParticipate in code reviews with a focus on security best practicesCreate technical documentation for internal systems and API endpointsIntegrate with Hardware Security Modules (HSMs) and cloud KMS servicesImplement secure secret management and rotation mechanismsBuild defense-in-depth security controls across all servicesConduct security analyses of third-party dependenciesParticipate in security audits and penetration testing remediationQualifications5+ years of Back-end development experience, building production systemsStrong proficiency in Python (FastAPI, Django, or Flask) and/or Go, Rust, C++Solid understanding of cryptographic principles, including symmetric and asymmetric encryption, hashing, key derivation and digital signaturesExperience with RESTful API design and developmentUnderstanding of authentication and authorization patterns (OAuth 2.0, JWT, and mTLS)Upper-Intermediate level of EnglishWILL BE A PLUSExperience with Trusted Execution Environments, such as Intel TDX, NVIDIA Confidential Computing, or Secure VMsExperience with Git, CI/CD pipelines, and modern development workflowsAdditional InformationPERSONAL PROFILEAbility to adapt and thrive in ambiguous and fast-moving startup environmentsStrong problem-solving skills and the ability to diagnose complex security workflowsExcellent communication skills and the ability to collaborate with DevOps, AI, and cloudengineering teamsDetail-oriented mindset to ensure high availability and reliable services