Colin Gillingham
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Booking assessments and projects · New York or remoteBooking · NYC or remote NewTokens of Appreciation: donate your unused AI tokensTokens of Appreciation

I work as an independent forward-deployed engineer. I sit inside your team, in your repo and your tools, and build the apps, production AI pipelines and GTM systems you need. I led HubSpot’s Agent Hub from private beta to general availability and have shipped 13 AI products.

Colin GillinghamLed Agent Hub to GA at HubSpot13 AI products shipped
Book a free 30-min call See pricing

What I build.

Three kinds of project. Each one is something I’ve already shipped for myself or for HubSpot.
Up to 4 weeks · from $12k

Application development

AI-native web and iOS apps, designed, built and launched.

  • Voice, chat and agent features at the core
  • Design, build and App Store launch
  • Analytics and payments wired in
ShippedGlottie, on the App Store in 2 months
Up to 4 weeks · from $6k

AI GTM engineering

Pipeline that builds itself: research, enrichment and outreach, wired into your CRM.

  • Enrichment and lead scoring
  • Routing and personalized outbound
  • CRM automation and clean data
ShippedLeadShogun, and HubSpot data enrichment
I’ve built systems at
Tesla Employee #200
Mapbox GTM, CEO report
Delphi Digital Head of Marketing & Operations
Clearbit Head of Growth
HubSpot Group PM, AI
More about Colin →

Assess, build, run.

Find what to automate, ship the systems, and keep them running.
  1. 01$1,500 · 1 week

    Assess

    I interview your team, review workflows, and deliver a prioritized automation list plus a working demo of your most-hated task.

  2. 02From $6k · Up to 4 weeks

    Build

    Fixed-price projects that ship the systems the assessment found. In your repo, with evals from day one.

  3. 03$10k/month · Ongoing

    Run

    I run and improve your automations, train staff, and roll out new initiatives. Projects can sit on top.

Simple pricing.

Assess what to automate, build the systems, and run them over time.
AI Assessment · 1 week · Credited toward a project. Find what to automate. I interview your team, review workflows, and deliver a prioritized list plus a working demo of the one task they hate most. $1,500
Up to 4 weeks

AI GTM engineering

from $6k

Build what the assessment found. Enrichment, scoring, routing and outbound, wired into your CRM.

Most common Up to 4 weeks

AI production pipeline

from $8k

Build what the assessment found. Your prototype made reliable: evals, routing, monitoring and cost.

Up to 4 weeks

Application development

from $12k

Build what the assessment found. An AI-native web or iOS app, from first screen to launch.

Retainer · Ongoing · Limited to 3 clients at a time. Run the automations. 10 days a month: I run and improve your systems, train staff, and roll out new initiatives. Projects can sit on top. On-site available for NYC companies. $10,000/month about $1K a day

I’ve done this at scale.

See all the work →
Video: HubSpot

Agent Hub at HubSpot

Led HubSpot’s home for AI agents from private beta to general availability for Pro and Enterprise customers.

hubspot.com (opens in a new tab)

PhoneScreen AI

Voice agents that have completed 3,000+ phone screens for hiring teams.

phonescreen.ai (opens in a new tab)

TinyNews

An AI newsroom, from first commit to public launch in four days.

tinynews.ai (opens in a new tab)

Questions.

What do you build?

Three kinds of project: AI-native web and iOS apps; production AI pipelines that take a working prototype and make it reliable with evals, model routing, caching, monitoring and cost controls; and AI GTM engineering covering enrichment, lead scoring, routing, personalized outbound and CRM automation.

How does a project work?

Assess, build, run. It starts with a free 30-minute call. A one-week AI assessment ($1,500, credited toward a project) finds what to automate and includes a working demo of the task your team hates most. Builds are fixed-price projects of up to four weeks, in your repo and your tools, with evals from day one, and your team owns the code. A retainer keeps the systems running and improving.

Can you work with frontier models, open-source models, and n8n?

Yes. The work can include OpenAI and Anthropic models, Claude Code, OpenAI Codex, eval systems, open-source or self-hosted model paths, and cloud-hosted or self-hosted n8n automation environments.

How much does it cost?

The AI assessment is $1,500 for one week and is credited toward a project. Builds are fixed-price: AI GTM engineering from $6k, AI production pipelines from $8k, and application development from $12k, each up to four weeks. The retainer is $10,000 a month for 10 days a month, limited to three clients at a time.

Do you build the systems yourself?

Yes. I scope, design, build, evaluate and launch the work myself, then hand it over with docs and a walkthrough so your team owns the code.

Do you work onsite?

I’m based in New York and work on-site with NYC companies when it helps, including on retainer. Otherwise projects run remotely.

Start with an assessment.

Book a free 30-minute call to discuss an AI assessment, a project, or ongoing retainer work.

Next open times EDT
30 min · Google Meet See all times

Free call · Assessment credited toward projects · On-site in NYC when it helps