* Designed and implemented cryptographic systems across the mobile app (Swift/Kotlin), backend, and verifiable key management infrastructure on AWS Nitro Enclaves (Rust) for Bitkey, a Bitcoin collaborative-custody wallet serving customers in 95 countries.

* Set Bitkey’s privacy strategy and introduced Chain Code Delegation (BIP 89), orchestrating server, cryptography, and mobile teams to deliver the industry’s first privacy-preserving collaborative-custody wallet.

* Led research and development of new models for key custody and recovery using MPC protocols (FROST, OPRFs) and trusted execution environments to improve usability, privacy, and transparency.

* Conducted cryptography and security reviews across multiple systems and mentored engineers on applied cryptography and key custody security.

* Represented Block publicly through conference presentations and patent filings, advancing industry leadership in key management and applied cryptography while partnering with internal teams to translate research outcomes into customer-facing products.

* Worked on adding support for Ethereum to the Casa iOS app

* Modernized iOS stack to use modern Swift idioms, and refactored them to Swift packages for better modularity + testability

* Led delivery of a mobile application for customers to track their progress and chat with their coach

* Designed and implemented a highly versatile funnel and purchasing system, supporting weekly marketing experiments and multiple payment processors.

* Set up infrastructure for deriving key product activation insights, integrating marketing funnel data and application analytics to drive user engagement and retention.

* Led weekly meetings identifying high-leverage opportunities to improve product retention using data from our product and marketing funnels in Amplitude

* Operated across the stack on our marketing assets (Next.JS/Typescript), product (Rails), and mobile (Typescript)

* Managed six-figure accounts while overseeing a team of seven developers and designers, generating inbound leads, and interfacing with clients for acceptance reviews

* Led team towards designing, developing, and launching successful C2C marketplaces and websites ranging from landing pages to brand pages with CMS integration

* Clients include the National Library Board of Singapore, Courtney Barnett, GlassPass, and the Trill Project

* Steered the holistic development and operational success of a 32-member platoon, fostering a cohesive and high-performing team environment.

* Mentored team members in developing force-tracking and mission review processes, enhancing their growth and operational proficiency.

* Ensured optimal functionality of communication and computer systems, crucial for effective joint forces planning, coordination, and mission success.