Senior iOS Engineer (Secure Enclave, Autofill, Cryptography) — Architecture Validation + MVP Build

I am seeking a highly experienced Senior iOS Engineer with deep knowledge of Secure Enclave, LocalAuthentication, Keychain, cryptography, and the iOS Autofill Extension system. This is a security-critical project. You will validate an existing architecture and then implement the core modules of the MVP. This role is not for junior or lightweight iOS developers. You must have provable experience building security-sensitive apps (password managers, finance, identity, encrypted storage, etc.). Phase 1 — Architecture Review (Gate A): You will: Review the Authentication, Vault, and AI trust model specifications Validate architectural soundness Identify blockers or security issues Confirm implementation feasibility Provide structured technical feedback Phase 2 — MVP Build: After validation, you will implement: Biometric + cryptographic PIN authentication (no app login screen; triggered by autofill) Encrypted vault (AES-256-GCM, integrity hashing, Secure Enclave–wrapped key) iOS Autofill extension (ASCredentialProviderViewController) Local AI trust scoring engine (simple statistical model, Sentinel v1) End-to-end integration on device Requirements: 7–10+ years iOS experience Expert in Secure Enclave, Keychain, LocalAuthentication Experience writing encryption code (AES-GCM, hashing, KDF) Experience building app extensions (especially Autofill) Strong understanding of security-sensitive design Excellent English and communication skills To Apply: Please send: Examples of past security-sensitive apps Description of work with Secure Enclave or cryptographic storage Confirmation you have built iOS Autofill extensions Two paragraphs explaining your approach to secure architecture review Apply tot his job