layout	cv
title	Justin Martin

Justin Martin

Principal Engineer, Applied Cryptographer, R&D

justin@thefrozenfire.com | frozenfire.eth

Currently

Doing applied zero knowledge application development, currently focused on client-side-friendly ZK proofs for on-chain KYC/AML. My research focus is in how one builds user-facing zero knowledge protocols which use simple cryptographic primitives, have minimal verification costs, clear trust assumptions, and which are relatively simple to audit. I am particularly focused on creating ZK protocols which interoperate with real world concerns such as legal reputation, regulatory compliance, and real world identity.

Specialized in

• Web Proofs (zk-tls, mpc-tls)
• Security engineering (Cryptography, threat mitigation, compliance)
• Telecom systems engineering (SMS, VOIP, SMPP, SIP)
• Network engineering (Cloud provisioning, K8S clustering)
• Operational intelligence, data science

Research interests

• Zero Knowledge cryptography
• Sybil resistance
• Cryptoeconomics
• Privacy
• Adversarial Interoperability
• Due Process by Design

Patents

2019 Blockchain network communication management, US20210243036A1

Occupation

2022 - 2025 Keyring Network

• Developed the ZK privacy protocol for on-chain KYC/AML from the ground up
• Developed a number of ZK cryptographic primitives in Circom, Typescript, and Rust
• Developed a ZK circuit development toolchain in Typescript
• Implemented ZK-constructed Blinded RSA signing
• Developed an OrbitDB-based decentralized protocol messaging layer
• Productionized TLS Notary for MPC-TLS-based Web Proofs
• Support and guidance around privacy, security, decentralization, trust minimization

2022 - 2023 eth.limo

• Provided guidance and support for reducing trust assumptions, increasing privacy, decentralizing, and improving performance
• Developed Chauffeur, a local infrastructure stack for ENS resolution and serving

2021 - August 2022 Ethereum Foundation - PSE Team

• Developed a ZK system for proving knowledge of JWTs issued by social identity providers
• Produced open source ZK cryptographic primitives
• Provided community education and support for ZK tooling, mixers, and other privacy/crypto projects
• Talent scouting, routing prospects toward ESP projects
• Grants coordination, bootstrapping
• Bootstrapped product management processes for bringing grant projects toward production
• Infrastructure support for compiling large ZK circuits

2013 - 2021 CallFire / EzTexting

• Started as a vendor for SMS connectivity through SMSCloud
• Professional Services work for enterprise customers, developing custom call scheduling, routing, and reporting solutions
• Developed CallFire's PHP SDK
• Refactored majority of message processing, routing, and origination software for EzTexting
• Acted as Platform Architect, DevOps Engineer, Security Engineer
• Produced a "Cloud Caller" provisioning automation system which enabled 20X increase in outbound capacity
• Oversaw migration to automated cloud provisioning tooling, automated monitoring system
• Developed Operational Intelligence platform producing reporting, monitoring, and analysis for infrastructure and telephony operations
• Acted as Principal Engineer in Operations, overseeing infrastructure management, security, carrier operations
• Developed an automated, heuristic-and-machine-learning-based messaging compliance system, enforcing industry content regulations
• Developed anti-spam, anti-fraud threat modelling engine
• Acted as Principal Engineer in Growth, bootstrapping a Growth team effectively utilizing A/B testing to massively decrease churn, increase conversion and ARPU

2013 - 2019 Roave

• Developed and managed SMSCloud, a high-throughput SMSC connecting businesses to telephony carrier networks
• Oversaw operations of software development agency business (contract negotiations, recruitment, etc)

2012 MediaDevils

• Ecommerce sweatshop
• Built numerous custom ecommerce websites for "As Seen on TV" products
• Built custom membership video streaming platforms
• Built specialized social network / online learning platforms

FOSS

2008 - 2016 PHP

• Credited documentation maintainer
• Voting project member
• Community management (IRC, reddit, etc)
• Founded PHP Mentoring
• Contributed to Zend Framework