We are seeking an experienced
Senior Middleware / PKCS#11 Engineer
to serve as the core technical owner of host-side cryptographic integrations for the Infrastructure Layer. You will be responsible for designing and building low-level host middleware, virtual drivers, and abstraction layers that interface desktop applications (e.g., Adobe Acrobat, web browsers) with underlying hardware tokens (QDSD), PKCS#11 providers, Microsoft CNG/KSP stacks, and remote eSign gateways.

Key Responsibilities
- Cryptographic Stack Integration:
Develop and maintain host-resident middleware and provider modules supporting PKCS#11, Microsoft CNG/KSP, legacy CAPI, and smartcard/DSC token driver interfaces.
- Producer Layer Implementation:
Implement the Model A eSign producer to capture live Application Service Provider (ASP) evidence flows end-to-end.
- Hardware Interoperability:
Lead physical lab testing to integrate and regression-test commercial DSC token vendors plus 1 Hardware Security Module (HSM).
- Offline Fault Tolerance:
Design replay-secure resubmission logic for offline execution modes,



ensuring zero duplicate custody entries during fault injection.
- Strict Fail-Closed Architecture:
Enforce absolute error honesty across the evidence generation pipeline, ensuring zero fabricated or inferred field values under adversarial conditions.
- Technical Leadership:
Serve as the day-to-day technical lead for Pod B (Producers), collaborating with embedded hardware engineers and the Chief Trust Architect.

Required Qualifications & Experience
- Experience:
5–10 years of hands-on host-side cryptographic system integration.
- Core Cryptographic Domains:
Deep expertise in PKCS#11, Microsoft CNG/KSP, CAPI, smartcards, and DSC token stacks.
- Industry Background:
Proven track record with hardware token vendors, Certifying Authority (CA) integration teams, or Banking/BFSI digital signing platform developers.
- Technical Languages:
High proficiency in system-level languages such as C, C++, Rust,

📌 Senior Middleware (Pune City)
🏢 DIGITAL TRUST INFRASTRUCTURE INDIA
📍 Pune City