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Products: R-Series Trust Layer, Zero-Knowledge Verification and Post-Quantum Cryptographic Infrastructure Company: DCS AI Technologies LLC Products: R-Series Trust Layer, Zero-Knowledge Verification and Post-Quantum Cryptographic Infrastructure Location: Gurugram, Haryana Work from Office Work Mode: On-site only Employment Type: Full-Time, Permanent Experience: 7-15 years website - dcslabs.ai, cosryx.com Compensation: 2030 LPA + performance bonus + ESOP; flexible for an exceptional candidate About DCS AI Technologies DCS AI Technologies builds advanced AI, cryptographic trust infrastructure, verifiable autonomous systems and space-intelligence platforms. Our R-Series technology provides verifiable digital receipts, audit lineage, zero-knowledge verification, cryptographic provenance and post-quantum-ready trust infrastructure for AI agents, enterprise systems, government platforms and mission-critical applications. We are hiring a senior, hands-on cryptography and protocol-security professional to lead the security architecture, implementation assurance and independent audit readiness of the R-Series. Role overview The Principal Cryptography & Protocol Security Lead will own cryptographic architecture and protocol-security assurance across: R+2: Verifiable receipts and signed execution evidence R+3: Audit lineage, provenance and verification exports R+4: Zero-knowledge verification using Groth16/BN254 Future R-Series protocols Post-quantum and hybrid cryptographic migration Blockchain anchoring and smart-contract verification Key management, signing, rotation and recovery This is a hands-on technical leadership role. It is not a general GRC, ISO compliance or penetration-testing position. Key responsibilities Lead cryptographic architecture and protocol-security assurance for R+2, R+3, R+4 and future R-Series systems. Review digital-signature workflows, receipt generation, proof verification, lineage integrity and replay protection. Review Groth16/BN254 zero-knowledge circuits, constraints, prover/verifier logic and proof-binding assumptions. Identify under-constrained circuits, unsafe assumptions and implementation weaknesses. Own the post-quantum migration and crypto-agility roadmap. Design and review hybrid classical and post-quantum cryptographic modes. Maintain cryptographic inventory, algorithm identifiers, protocol versions and backward-verification rules. Ensure historical receipts and audit records remain verifiable after algorithm, key-format or protocol upgrades. Review PKI, HSM, secrets management, key generation, storage, rotation, revocation and compromise-recovery processes. Review blockchain anchoring, smart contracts and on-chain verification logic. Develop protocol threat models and security requirements. Review source code and cryptographic-library integrations. Establish security release gates for critical cryptographic components. Coordinate technical preparation for independent security assessments, including NCC Group and a future Trail of Bits specialist review. Manage audit evidence, technical responses, remediation and retesting. Verify that deployed code matches the independently reviewed version. Support security documentation for enterprise, government, aerospace and defence customers. Mentor cryptography, ZK, blockchain and security engineers. Mandatory technical skills Strong experience in applied cryptography and protocol security. Digital signatures, hashing, authenticated data structures and cryptographic commitments. Public-key infrastructure, certificate management and key lifecycle security. Zero-knowledge proofs and circuit-security concepts. Groth16 or comparable ZK proof systems. Understanding of elliptic-curve cryptography and pairing-friendly curves. Post-quantum cryptography and crypto-agility. Threat modelling and secure protocol design. Secure key generation, storage, rotation and recovery. Strong programming ability in at least two of: Rust Go C/C++ TypeScript Solidity Experience reviewing security-critical source code. Experience preparing systems for external security assessments or resolving audit findings. Required post-quantum knowledge The candidate should understand or have implementation experience with: ML-KEM ML-DSA SLH-DSA Hybrid classical and post-quantum architectures Post-quantum certificate and signature migration Algorithm versioning and crypto-agility Key-size, signature-size, latency and performance trade-offs Side-channel and implementation-security risks Post-quantum integration with PKI, HSMs and distributed systems Preferred experience Formal verification or protocol-verification tools Smart-contract and blockchain security ZK circuit auditing liboqs or equivalent post-quantum libraries OpenSSL, BoringSSL or other cryptographic-library integrations HSMs, KMS systems and hardware-backed signing Security research or published cryptographic work Open-source cryptography contributions Independent security-audit experience Aerospace, government, defence or mission-critical systems Secure multi-party computation, threshold cryptography or federated protocols Educational qualifications Preferred qualifications include: B.Tech/B.E. in Computer Science, Information Technology, Electronics or a related discipline M.Tech/M.E., MCA or M.Sc. in Computer Science, Mathematics, Cybersecurity or Cryptography PhD in Cryptography, Computer Security or a related field is valuable but not compulsory Equivalent practical expertise and strong cryptographic implementation experience will also be considered. Technical interview evaluation Shortlisted candidates should be prepared to discuss: The difference between ML-KEM and ML-DSA Migration from classical digital signatures to a hybrid post-quantum system Designing crypto-agility without breaking backward verification Maintaining receipt and audit-proof verification across algorithm and protocol versions Risks caused by under-constrained zero-knowledge circuits Proof-binding and verifier-security assumptions Key compromise, rotation and recovery Preparing a cryptographic platform for independent audits by NCC Group and Trail of Bits A practical technical assignment may be included during the selection process. What this role is not This role is not suitable for candidates whose experience is limited to: ISO 27001 or GRC documentation SOC operations General penetration testing Network security Vulnerability scanning Generic blockchain development Cybersecurity policy management without cryptographic implementation experience Reporting The role reports directly to the Founder/CEO and works closely with: R-Series engineering teams Zero-knowledge engineers Blockchain and smart-contract engineers Cloud and infrastructure-security teams External security auditors COSRYX and government-programme teams Authority The selected candidate will have authority to recommend blocking a release when: Critical cryptographic findings remain unresolved ZK constraints or verifier assumptions are insufficiently tested Key-management controls are incomplete Deployed code differs from audited code Cryptographic algorithm or protocol changes lack review Required security evidence is incomplete Why join DCS AI Technologies Work on original cryptographic trust infrastructure Lead R-Series security and post-quantum evolution Work directly with the founder and core engineering teams Coordinate independent assessments by globally recognised security firms Build technology intended for enterprise, government, aerospace and mission-critical systems Performance incentives and ESOP participation