Michael Marsack

Michael Marsack · Product & GrowthI build the product, and the engine that grows it.

Most companies hire two people for that. At Hello Haven, I was both. As Director of Growth Engineering I shipped real-time AI that sees and talks, and built the engine that pulled in 30,000+ users at under $30 each. Before that: COO, founder, Division I javelin thrower. Next: software that acts for people, built so they trust it.

Let's talk See the proof Résumé
  • $2M+Ad spend managed
  • 30K+Users acquired
  • <$30Per acquired user
  • $750K+Sales I closed
  • 50+Projects shipped
Act I · What I'm best at

Pick a skill. Watch it work.

Skill 1 of 5

Systems & infrastructure

At Hello Haven I built dozens of internal systems, the entire marketing tech stack (including an automated system that posts ads across platforms) and the full analytics stack. At Martech Studios I've shipped 50+ web, mobile and machine learning projects, plus support systems that scale.

See it inHaven's growth engine Analytics and referrals Martech Studios
Act II · Try it

Don't take my word for it. Run the numbers.

Three small, live models of how I think. Change the inputs and watch what moves.

Users a month today
At under $30 per user

$30 is what I reached at Hello Haven, in consumer AI, across $2M+ of spend. Every market prices attention differently; the first conversation is about yours.

Act III · My story

Competitor. Operator. Founder. Builder.

  1. Roots

    Raised to own the outcome

    I grew up in a family of blue-collar business owners where the standard was simple: figure it out, or let me do it. Dinner doubled as a staff meeting. So I figured it out, and I still do. I take the problem, not just the task, and when something is beyond me I learn it fast or call the person in my network who has already solved it.

  2. Competitor

    Division I javelin

    I threw javelin for Duke, which means I spent four years trying to throw a spear farther than strangers while a man with a tape measure wrote it down. In Division I track every throw is measured and every result is public, so you learn to train for the one number that matters and to own it in the open. If it's not hard, it's not worth doing.

  3. 2021 to 2023

    Operator

    I came into technology through operations. At Word On The Block I went from Head of Operations to COO in nine months, then ran operations as fractional COO of Salesa AI, an AI outbound sales product. Operations shows you what engineers rarely see: where the money goes, where the customers leave, and which problems decide whether the company lives.

  4. 2022 to now

    Founder

    I founded Martech Studios and acquired a micro SaaS. I've closed $750K+ in sales personally and built the technology and marketing systems for companies that have raised $25M+ combined, across 50+ projects. Fifty launches teach the same lesson fifty ways: the product that wins is the one people understand in a minute.

  5. 2026

    Building personal AI

    As Director of Growth Engineering at Hello Haven, a personal AI company valued at over $50 million, I owned both halves of the problem: the product, with real-time vision and live calls, and the growth engine that brought in 30,000+ users at under $30 each. I learned what it takes for people to let an AI into their everyday life. It has to be simple, and it has to earn trust.

  6. Next

    The interface that acts for you

    Software is changing from something you operate into something that acts for you. Most of it will be clumsy or creepy. The companies that win will make it feel as simple as a text message and as trustworthy as a friend. That's the problem I want to spend the next decade on, with people who feel the same pull.

Act IV · The proof

The proof.

That's the work. Let's talk about yours.

Let's talk
Act V · How I work

How I work

  • Taste is the job now

    Anyone can build anything now. The work is deciding what deserves to exist and what it should feel like. That's taste, and it's the job.

  • Fewest clicks to aha

    Every click is a chance to lose someone. Sign-up lives on the landing page and works for everyone. Getting there takes hard cuts.

  • You hire my network too

    It's not only what I know. It's what I and my network know. If I can't do something yet, I learn it fast. If it can't wait, I already know someone who has done it.

  • Build the moment people share

    Products spread through moments worth showing someone. I build those in, so every user brings the next one.

  • Less is more

    Charles Perrow showed that complex, tightly coupled systems fail in ways nobody predicts. So I cut parts, steps, screens and data until nothing is left to confuse anyone.

  • 10 who love it beat 1,000 who don't mind

    Love spreads. Okay doesn't. I build for the 10.

On a team

What I'm like to work with.

  • Lead it or row it

    I've run a company's operations as COO and I've been the guy in the trenches at 2 a.m. Hand me the whole thing or hand me a piece of it. Both get done, and I won't make it weird about which one.

  • Sprints, then another sprint

    My best work came in short pushes with a finish line: pick the target, go hard, ship, read the numbers, go again. Marathons are for people who like meetings.

  • Make the business part easy

    Billing, support, onboarding, reporting: the boring stuff every company runs on. I build it so it runs itself, and the team gets to spend its hours on the interesting part.

How I teach a product

Teach inside the product. Everything else is a fallback.

Use the highest rung you can. Each step down reaches fewer people.

  1. Interactive guides with videoTeach inside the product, at the moment someone needs it.
  2. No interactive guide? Make videos.Show the exact clicks.
  3. No videos? Write posts with pictures.Screens, arrows, one task per post.
  4. No pictures? Write one very specific post.Answer one question completely.
  5. Nothing at all?Then you don't have a business.
Act VI · What you get

What your team gets.

  • A product and the engine that grows it

    One person who ships the feature and then fills it with users. At Haven that was real-time vision and calls on one side, 30,000+ users at under $30 each on the other.

  • A working app in an afternoon

    Web, mobile and internal tools, built fast and built to last. 50+ shipped at my studio.

  • Numbers you can act on

    Attribution from first click to daily use, simple enough that people trust it and make decisions with it.

  • Fewer clicks to the aha

    Sign-up on the landing page. Every screen earns its place or goes.

  • Creators, video and ads, run in-house

    I've hired and directed influencers, UGC creators, studios and actors, and run the ad network of your choice.

  • My network on call

    If I can't do it yet, I learn it fast. If it can't wait, I already know someone who has done it.

I learn fast, decide faster, and when I'm wrong I say so first.

Finale · Let's talk

Got something hard? Let's build it.

Software is about to start acting for people, and someone has to build the version they trust. I want a long run on a product like that, hard and worth it, on a sharp team that keeps score and likes a sprint, with people who've stayed up until 2 a.m. on something because they couldn't put it down.

Open to remote roles in AI engineering, product engineering, growth and GTM engineering, product management, strategy and special projects.

Let's talk
Emailmichael.david.marsack@gmail.com
LinkedInlinkedin.com/in/michael-marsack ResumeRead it on one page
Encore

Hiring for something else? Pick the role.

Growth & GTM Engineering Acquisition, referrals and moments people share. AI Engineering Real-time voice, vision and agents, shipped end to end. Product Engineering Web and mobile products where every screen earns its place. Product Management Listening, hard cuts and features that ship. Strategy & Special Projects Operations, sales and the hard, undefined problem.