# Mark Faga > Principal engineer and founder. Boston, MA. Full-stack principal engineer who moves fluently across frontend, APIs, and data infrastructure, with two decades of shipping production software. Founded Wayfair’s GraphQL platform, now serving billions of requests a day. Co-founded Via AI, where I built a data platform resolving 100M+ profiles and nearly a trillion relationship edges in under 5 hours, plus an agentic system that coordinates AI coding agents across the team. I run Faga Labs, a principal engineering studio. I treat AI as architecture: agents, MCP integrations, and LLM triage are core primitives. ## Pages - [Home](https://markfaga.com/): Who I am and what I am doing now. - [Work](https://markfaga.com/work): Career timeline, education, and stack. - [Investing](https://markfaga.com/investing): Angel groups and investments. - [Speaking](https://markfaga.com/speaking): Talks I have given. - [Projects](https://markfaga.com/projects): Side projects. ## Work - Faga Labs, Founder, Principal Engineer, Jan 2026 – Present: Founded a principal engineering studio that delivers full-stack and applied AI work for Xometry, Financial Recovery Technologies, and Great Heights Learning. - Via AI, Co-Founder / Engineer, Aug 2025 – Present: Architected a data resolution platform that merges multiple sources into 100M+ profiles and nearly a trillion relationship edges, fully rebuilt in under 5 hours. - TruFit Talent, Fractional CTO, part-time, May 2026 – Present: Led a full modernization of the simulation assessment platform and extended it to full recruiting workflows: auto-generated simulations per school and role, AI test personas that validate simulations and scoring before real candidates, live voice simulations, and a school portal with interview pipelines. - Prefab, Advisor, Aug 2022 – Mar 2026 (advisory): Technical advisor from 2022 through the acquisition by Reforge. - Hunt Club, Principal Software Engineer, Mar 2023 – Jun 2025: Led the build-out of the data platform and full-stack application, reaching $700M ARR and setting up a multi-million-dollar data partnership that closed after I left. - Wayfair, Principal Software Engineer, May 2019 – Mar 2023: Founded the GraphQL program, platform, and team that serve billions of daily requests across the Storefront, Partner, and Internal APIs. Oversaw the Storefront Product Details Page and helped shape Blockbuilder, a schema-driven CMS for live content experiments. - ezCater, Staff Software Engineer, Jan 2017 – Apr 2019: Led the rebuild of the customer service platform: built the proof of concept, won executive buy-in, and launched phone and chat with zero downtime, at an estimated $10M in annual savings. - Attend, Tech Lead / Staff Software Engineer, Jul 2015 – Dec 2016: Interim Director of Engineering through a company pivot, then led the Event Farm acquisition merger across Salesforce, Marketo, and a rebuilt iOS app, supporting $1.5M+ in expected revenue. - The Baupost Group, Software Engineer, Jul 2010 – Jul 2015: Built an MS Dynamics CRM with a Web API 2 service tier and a WCF employee data platform, replacing legacy systems. - Bank of America, AVP, Business Technology Integration Consultant, Jul 2006 – Jun 2010: Designed the approach to merge Bank of America and Merrill Lynch annuity and insurance systems across 20+ application teams. - Cheng & Tsui, Computer Technician, Feb 2006 – May 2006: Assisted in the migration from Windows 2000 Server to Windows 2003 Server. - General Electric, IMLP Intern, Project Manager, Jun 2005 – Aug 2005: Managed the initial rollout of Business Objects ad hoc query software to Sensing worldwide sites. - The Hartford, SQL Developer Intern, Jun 2004 – May 2005: Upgraded the company server from SQL 6.5 to SQL 2K. First production code. ## Education - Boston College, Bachelor of Arts, cum laude, Computer Science, minor in Film Studies, 2002 to 2006. ## Interests Camping and hiking, skiing, golf, cooking, home improvement projects, motorcycles, and traveling. Eagle Scout, February 2000. ## Talks - Modernization Stories: Monoliths, Migrations and Mergers: Apollo GraphQL panel, Host. - [How Wayfair Slashed Costs, Simplified Infra, and Cut Latency in Half with Apollo Router](https://www.apollographql.com/events/how-wayfair-slashed-costs-simplified-infra-and-cut-latency-in-half-with-apollo-router): Apollo GraphQL, with Dewey Jose. - [Building Relay Spec Compliance in Federation](https://www.apollographql.com/events/building-relay-spec-compliance-in-federation): apidays GraphQL Scale 2022, also an Apollo GraphQL webinar, 2022. - Change Management with Apollo Federation: Apollo GraphQL, with Lenny Burdette. - Patterns of Adoption: The Many Paths to a Unified Graph: Apollo GraphQL. - [How Wayfair Delivers Bespoke Solutions at Scale](https://www.apollographql.com/events/how-wayfair-delivers-bespoke-solutions-at-scale): Apollo GraphQL. - ezCater's Customer Service Platform on Twilio Flex: Twilio Engage 2019, 2019. - Deterministic Mocking with GraphQL and Apollo: React Boston 2018, 2018, with Hillary Bauer. ## Side projects - [Hum](https://familyhum.ai) (live): The family operating system. One app for a family’s calendars, chores, routines, and allowances. - [AlwaysNotify](https://alwaysnotify.com) (live): An AI triage system for your life. It reads your email, calendar, and to-dos, decides what matters, and pages the right person until someone owns it. - Bosun (in-development): A harness for your harnesses. Run and coordinate Claude Code, Codex, and pi sessions from your desktop or your phone. ## Investing - [TBD Angels](https://www.tbdangels.com/), Member: A Boston angel group. If you are a founder raising capital, I am glad to connect you with the group. - [Massachusetts AI Coalition](https://massaicoalition.com/angels/), Angel pledge signer: The Massachusetts AI angel investor community supporting local founders. - [Colette](https://askcolette.ai/) (active) - Prefab (exited): Acquired by Reforge, converted. Reforge acquired by Miro, exited. - More angel investments coming. ## Links - [Faga Labs](https://fagalabs.com): My principal engineering studio. - [Book a call](https://fagalabs.com/book-a-call): The only contact path. - [GitHub](https://github.com/mjfaga): My GitHub profile. - [LinkedIn](https://linkedin.com/in/markjfaga): My LinkedIn profile. - [X](https://x.com/markjfaga): My X profile. - [Facebook](https://www.facebook.com/mjfaga): My Facebook profile. - [Instagram](https://www.instagram.com/markjfaga): My Instagram profile. - [Sitemap](https://markfaga.com/sitemap-index.xml): All pages on markfaga.com.