# Christian Ayscue > Building Meta’s AI Coding Agent | Previously at Apple | 3x Founder Location: San Francisco, California, United States Profile: https://flows.cv/christianayscue Building Meta’s AI Coding Agent from the ground up. I architected & executed the first large-scale LLM-based code refactor ever performed at Meta. Built several large-scale software platforms from scratch. Got 400,000+ user signups. Improved iMovie and Final Cut Pro as a software engineer at Apple. ## Work Experience ### Software Engineer, AI Coding Agent @ Meta Jan 2024 – Present | Menlo Park, CA Building Meta's AI Coding Agent, Devmate, from the ground up. Zuck said 50% of new code at Meta could be written by Devmate in the next couple years. I personally: - Hooked up native tool use / function calling across all models - Managed all LLM inference spend and rate limiting - Built orchestration layer for our terminal agent Last year, I architected and implemented a system to refactor a multi-million line-of-code codebase using an LLM. It was the first large-scale AI code refactor ever performed at Meta, and received public praise from a senior eng director. ### Founder, Lead Engineer @ Piggy Jan 2022 – Jan 2024 | Sunnyvale, CA Financial planning platform with sophisticated financial projections and game-like drag-and-drop UI Features: Organize all of your finances. Create and manage your financial objects, which include generic object types like Asset, Loan, Expense, Income and Folder, along with 40+ specific object types like Child, House, Student Loan, Mortgage, 401k, Social Security, etc. Link your bank account to keep your financial picture up to date and organize your transactions. Plan your finances into the future. View and project your Cashflow statement and Worth statement (Balance Sheet) and Taxes (Federal Form 1040 + State Taxes) into the future. • Implemented a version control system and a "sync" algorithm to sync changes from the financial picture (current financial state) into plans • Optimized stats recalculation algorithm by implementing a cache mechanism so the app only recomputes stats that are affected by new changes - cut down recomputation time 40X - for context, the app computes "worth", "change in worth", and "cashflow" for every object in your financial plan, month-by-month, 80 years into the future • Built app with Typescript, React Native, Reanimated, Node.js, MongoDB, and AWS - deployed backend infrastructure and codebuild pipelines using AWS Cloud Development Kit (infrastructure as code) utilizing 14 popular AWS services • Collaborated with the Reanimated (React Native animation library) open source development team to fix bugs in Reanimated - they gave Piggy priority bug support because the app was one of the heaviest usages of their library ### Full Stack Engineer @ Sprig (formerly UserLeap) Jan 2021 – Jan 2022 | San Francisco, California, United States User Research & Survey Platform - Series B Startup - #1 Most upvoted product on Product Hunt in 2022 • Architected and implemented the "Cohorts" feature which enabled delivering targeted surveys to groups of users • Wrote mission-critical backend code that processed thousands of requests per second and selectively delivered surveys based on boolean logic rules (using Node.js, Postgres and Clickhouse) • Generated SQL queries for logic rules that used multilevel boolean operators with dozens of clauses and aggregations • Shipped over 80 PRs in a 2 month period, working closely with a Staff backend engineer ### Lead Engineer, Co-founder @ Recoup Jan 2019 – Jan 2021 Web and Mobile App Platform to get users bank fee refunds, rebates, coupons and rewards from online stores • Lead all development: backend (Node.js), database (MongoDB), AWS infrastructure, security across all surfaces, desktop and mobile-friendly web apps (AngularJS), Android and iOS apps - 4.7 stars with 2,500 ratings (Swift, Java) • Scaled app to 400,000+ user signups, $90k monthly revenue, 400+ million database records, 41 database tables, 63k lines of custom JavaScript code, 148 NPM packages, 91 transactional emails, 23 third-party APIs, managed 2 engineers • Automated backend systems to process "claims": bank fee scanning, email receipt scanning, submitting correspondences with banks and merchants via physical mail (Lob API) and email (Gmail, Yahoo! (IMAP), and Microsoft APIs) to get refunds, rebates and rewards for users ### Software Engineer @ Apple Jan 2018 – Jan 2019 | Cupertino, California, United States iMovie & Final Cut Pro (Video Apps) • Collaborated with the Data Model team to improve iMovie and FCPX's project import, export and sharing capabilities • Built features and debugged in the extremely complex, 20M+ line-of-code FCP/iMovie codebase - made changes at the lowest levels of the application, thousands of nested function calls deep • Made frequent changes to address concurrency issues, modify the data model and manage media files on the filesystem • Increased the efficiency of debugging by 3x for a team of 6 engineers working on the next major Final Cut Pro X feature by implementing a smart debug alert that surfaced the low-level root causes of most bugs • Partnered and pair programmed with Principal Engineers on mission critical projects ### Lead Engineer, Co-founder @ Excited Systems, LLC (DBA HappyFilter) Jan 2016 – Jan 2018 Web application that enabled customers to build custom Snapchat Geofilters for their events and weddings • Built in MEAN (JavaScript) stack • Generated over $60k in lifetime revenue • Gained exclusive backend access to Snapchat's Geofilter API • Formed traffic partnerships with top wedding blogs and Groupon ### Lead Engineer, Co-founder @ Artists Unlimited LLC Jan 2015 – Jan 2017 Soundcloud account management platform including a “repost calendar" with repost selling functionality, a user-to-user “repost trader”, and an automated scheduling system • Lead a team of industry experts, a graphic designer, and a 2 frontend devs in India to develop the product • Scaled app to support: 4,100 business users (with a total 29 million Soundcloud followers), $20,000 monthly revenue ($5,000 profit), 1,000 reposts per day, 2,100 follow-to-download gateways with 139,000 historical file downloads, 61,000 proprietary lines of code ### Project Manager - 2 web apps, 1 iOS App @ Self Employed Jan 2015 – Jan 2017 • Managed 6 engineers in India at once across various projects and my startup Artists Unlimited • Managed the development of two web apps and one iOS app for local clients: Darkshorefilms.com, Mentorsoverthemap.com and Cranium (iOS App) • Ensured delivery of high-quality final product. Hands on management, wrote code myself when I needed to ### iOS Engineer, Contractor @ Keen Jan 2015 – Jan 2015 • Developed and deployed features in iOS app: "Look" • Swift, Objective-C ### iOS Engineer, Owner - 3 Apps @ Self Employed Jan 2014 – Jan 2015 Designed, developed, and released 3 iOS Apps: • Orbit (Black Hole Run): Space-race game with complex custom game physics. Built in Objective-C, used SpriteKit game engine. I offered to sell it to KetchApp, the leading one-tap iOS game developer. They tested it with 500 users, but did not give me an offer • Snip: Sniper game. Built in Objective-C, SpriteKit • HireMi: An app that enabled students at Santa Clara University to hire other students to do odd jobs. Built in Swift and used Firebase as cloud data store ## Education ### Computer Science and Engineering Santa Clara University ### Phillips Exeter Academy ### Web Development Bootcamp Fullstack Academy ## Contact & Social - LinkedIn: https://linkedin.com/in/christian-ayscue --- Source: https://flows.cv/christianayscue JSON Resume: https://flows.cv/christianayscue/resume.json Last updated: 2026-03-22