# Colin Gillingham, AI product leader and reverse engineer Reverse engineer. Self-taught across sales, GTM ops, growth and marketing, product and engineering, and now AI. Eighteen years of taking the machine apart to learn how every part works: 18 years, 6 disciplines, 20+ products since 2023. Available now for AI product leadership roles in New York. ## The skill tree: six disciplines, 2008 to now - **Sales** (80+): Hiring teams using PhoneScreen, a product I sell myself. - **GTM Ops** (4 → 1): Four tools merged into one HubSpot stack at Delphi Digital. - **Growth & Marketing** (2.4×): Monthly sign-ups at Mapbox in a single year. - **Product** ($10M+): Data Enrichment ARR at HubSpot, up from under $1M in six months. - **AI** (20+): Products shipped since 2023, a few with paying customers. - **Engineering** (4 days): First commit to launch on TinyNews. Self-taught since 2013. ### 28 moments - 2008, Tesla: **Sales, as needed**. Sold cars and worked outbound when the team needed it. - 2008, Tesla: **CRM for the first stores**. Ran Salesforce for Tesla’s first US stores and service centers. - 2009, Tesla: **Service systems**. Ran the service software for Tesla’s first US service centers. - 2010, Tesla: **Exec dashboards**. Built the sales dashboards Tesla’s exec team ran on, regional to global. - 2011, Tesla: **Marketing automation**. Set up Tesla’s first marketing automation. - 2013, General Assembly: **Taught myself to code**. General Assembly, London. Everything after this, I built myself. - 2014, ProLeads: **Full-stack developer**. ProLeads, a 500 Startups company in San Francisco. - 2015, WIREWAX: **Head of Product**. Computer-vision video for Disney and Sony, reporting to the CEO. - 2017, Lisbon: **Freelance engineer**. Three years of building and advising from Lisbon. - 2019, Mapbox: **GTM engineering**. Led GTM engineering at Mapbox, supporting 10 product teams. - 2019, Mapbox: **GTM operations**. Ran GTM operations at Mapbox, reporting to the CEO. - 2019, Mapbox: **Funnel engineering**. Monthly sign-ups went from 25k to 60k in a year. - 2020, Mapbox: **Lead generation**. +300% lead volume from shorter, enrichment-backed forms. - 2021, Delphi Digital: **Head of Marketing**. Ran marketing and operations at Delphi Digital. - 2022, Delphi Digital: **Stack consolidation**. Moved Salesforce, Intercom, Pardot and WordPress onto HubSpot. - 2023, LeadShogun: **Automated outbound**. LeadShogun turned anonymous traffic into personal outreach. It got me hired at Clearbit. - 2023, TinyNews: **Four-day launch**. TinyNews went from first commit to launch in four days. - 2023, Clearbit: **Head of Growth**. Head of Growth and Analytics at Clearbit. - 2024, HubSpot: **$10M+ ARR**. Data Enrichment went from under $1M to $10M+ ARR in six months. - 2024, PhoneScreen: **Voice agents**. PhoneScreen has run 2,500+ phone interviews for 80+ hiring teams. - 2024, PhoneScreen: **Founder-led sales**. Selling my own products. 80+ hiring teams use PhoneScreen. - 2024, HubSpot: **5B runs a day**. Owned the runtime and observability behind 5B workflow runs a day. - 2025, HubSpot: **Evals and model cost**. 93% exact match on hand-labeled evals, at 98% lower model cost. - 2025, HubSpot: **Agent Hub to GA**. Took HubSpot Agent Hub from private beta to GA, with 2 PMs and 15+ engineers. - 2026, Glottie: **Glottie**. An iPhone tutor in 41 languages, on the App Store 63 days after the first commit. - 2026, Peregrine: **Speed to lead**. Peregrine calls new web leads within seconds and live-transfers the good ones to a rep. - 2026, Venture Factory: **Agent-run studio**. Venture Factory: agents build, launch and sell small B2B software. - 2026, Agent Wonderland: **Agent Wonderland**. Agents find, pay for and run other agents over MCP. 9,600+ npm downloads. ## Selected work: AI products I built Six AI products I designed and built myself since 2023. Slides: https://colin.gillingh.am/deck. PDF: https://colin.gillingh.am/colin-gillingham-selected-work.pdf. - **PhoneScreen** (2024–now, My company · Live): Voice agents that run the first phone interview for hourly jobs, at any hour. I built the whole pipeline from scratch on OpenAI and Twilio. 2,500+ interviews completed; 80+ hiring teams. https://phonescreen.ai - **Glottie** (2026, App Store): An iPhone language tutor you learn from by talking. Underneath, it’s a language-learning harness I built around OpenAI’s realtime voice model. 1,000+ language combinations; 63 days first commit to the App Store. https://apps.apple.com/us/app/glottie-ai-language-tutor/id6783112436 - **Agent Wonderland** (2026, Live): A marketplace where AI agents find, pay for and run other agents. I built the MCP discovery layer and the marketplace, with payments on x402 rails. 9,600+ npm downloads; x402 payment rails. https://agentwonderland.com - **TinyNews** (2023, 2026, Live): A news aggregator that reads thousands of articles a day and gives every reader a feed of their own. 1,000s articles indexed a day; 4 days first commit to launch. https://tinynews.ai - **UXLoops** (2026, Live): Customer research without the calendar. Send a customer a prototype, and an agent runs the research while they explore it. Async no sessions to schedule. https://uxloops.com - **Peregrine** (2026, Launching now): Speed to lead for B2B teams. A voice AI that calls every new lead seconds after the form and live-transfers the good ones to a free rep. 4 sec form to first call; 29 hrs B2B average (RevenueHero, 2024). https://peregrinelead.com ## Consulting: a five-day AI assessment I work inside your team for a week, find where AI will pay off, and leave you with a ranked plan and a working demo. If we build it together, the fee comes off the project. - Day 1, Interviews: How the work actually gets done, from the people doing it. - Day 2, Workflows: Where the hours, handoffs and copy-paste go. - Day 3, Systems: Your data, tools and owners, mapped end to end. - Day 4, Prototype: A working demo of the task your team hates most. - Day 5, Readout: A ranked plan: what to build first, and what it’s worth. - Assessment: $1,500, five days, on site in New York or remote - Build: from $7,500, fixed price, shipped in four weeks or less, in your repo; the assessment is credited, so you pay from $6,000 - Book a 30-minute call: https://cal.com/gillinghammer/30min ## Contact - Hiring: AI product leadership in New York (Group PM, Director or Head of Product on AI products; on site or hybrid). colingillingham@gmail.com - Consulting: start with the five-day assessment. https://cal.com/gillinghammer/30min - Résumé (PDF): https://colin.gillingh.am/colin-gillingham-resume.pdf ## More - Selected work (slides): https://colin.gillingh.am/deck - Writing: https://colin.gillingh.am/writing - Email: colingillingham@gmail.com - LinkedIn: https://www.linkedin.com/in/colingillingham