SignRise
Passwordless authentication and device-bound identity across mobile and backend services.
Professional background / Engineering
Jeffrey Monica — Resume
Software engineer working across native iOS and Android development, authentication, secure communications, backend services and production security. I design and implement the trust boundaries between devices, APIs and the systems that authorize requests.
jeffrey-monica-resume.md
Professional experience
Demonic Binary
San Francisco Bay Area
Engineering Manager
March 2025 – Present
Tech Lead
December 2018 – February 2025
Senior Engineer
August 2013 – November 2018
- Built SignRise mobile authentication flows, including hardware-backed identity, challenge-response verification, replay resistance and QR-based login.
- Owned Android authentication implementation, testing, beta release and production support.
- Developed backend verification and session services, including public-key registration, signature checks and operational telemetry.
- Implemented native iOS integrations using Swift, UIKit, Secure Enclave, NFC, BLE and offline-capable application state.
- Investigated authentication, network and component behavior using runtime analysis, Ghidra, LLDB and production diagnostics.
- Built test, release and monitoring workflows, including CI/CD, structured logs, crash analysis and AWS CloudWatch.
- Led engineering planning, architecture/code reviews and delivery coordination with a four-engineer team.
Selected projects
SiteGuard Monitor
Monitoring, reliability and incident-workflow engineering.
Realo
Mobile and backend application development and integration.
Technical skills
- Languages
- Swift, Kotlin, Objective-C, Java, Python, C/C++
- Mobile
- SwiftUI, UIKit, Jetpack Compose, Keychain, Secure Enclave, App Attest, Play Integrity, NFC, BLE
- Backend & Security
- REST APIs, OAuth/OIDC, authorization, session security, AWS, logging, threat modeling
- Testing & Operations
- LLDB, Ghidra, Wireshark, Crashlytics, Sentry, CI/CD, Docker
Education
University of Phoenix
Computer Science coursework · San Jose, California · 2009–2012