Michael Marsack

Michael Marsack

Growth & AI Product Engineer · Durham, NC (open to remote) · michael.david.marsack@gmail.com · linkedin.com/in/michael-marsack

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Summary

Growth and AI product engineer with 5+ years building and scaling early-stage tech companies. Ships AI product features end to end, from real-time voice and vision to the analytics and ad systems that drive growth, including $2M+ in managed ad spend, 30,000+ users acquired and acquisition costs under $30 per user. Has run operations as a COO and founded a software studio that closed $750K+ in sales across 50+ projects, so pairs hands-on engineering with business judgment.

Experience

Director of Growth Engineering, Hello Haven

Mar 2026 – Present · Remote

AI personal assistant startup, valued at over $50 million, building a voice-first agent for everyday life.

  • Oversaw $2M+ in ad spend and helped grow the user base to 30,000+ users
  • Cut cost per acquired user below $30 and cost per engaged user below $100 in a competitive consumer AI market
  • Ran influencer partnerships alongside paid campaigns across multiple ad platforms
  • Set up the company's entire marketing tech stack, including an automated system that posts ads across platforms, the external marketing site and landing pages
  • Built the full analytics stack, from marketing attribution to in-product usage analytics
  • Built the referral program and the in-app UI that drives it
  • Built Haven Vision, a real-time feature that lets the AI see through the user's camera, talk with them live and draw on the agent's memory
  • Built Haven's FaceTime-style video calling and screen sharing, so Haven can walk users through tasks step by step on their own screen
  • Shipped several dozen product features and dozens of UX improvements
  • Supported product testing and handled technical customer support

Owner, Martech Studios

Oct 2022 – Present · Remote

  • Founded and run a software studio that builds web and mobile apps for non-technical founders and small businesses
  • Closed $750K+ in sales personally, owning the full sales cycle from first call to signed contract
  • Acquired a micro SaaS product
  • Helped businesses that have raised over $25 million combined build their technology and set up their marketing systems
  • Designed and delivered 50+ client projects spanning web, mobile and machine learning
  • Managed small teams of developers and designers from scoping through launch
  • Built scalable customer support systems and ran SEO, GEO and ad network optimization for clients

Fractional COO, Salesa AI

Sep 2022 – Mar 2023 · Part-time · Remote

  • Ran operations for an AI outbound sales tool that finds qualified leads across social platforms and automates outreach
  • Led growth marketing and customer communication

Chief Operating Officer, Word On The Block

Jan 2021 – Oct 2022 · New York, NY

  • Promoted from Head of Operations to COO within 9 months
  • Ran operations for a marketing technology startup whose video overlay product helped small and mid-sized creators earn ad income and gave advertisers low-cost reach

Earlier experience

Strategy and Project Manager (Intern), Net Effect Ventures

Jul – Oct 2020

  • Built KPIs and workflows for a team of eight and directly managed three
  • Led research and build-out of a fully digital startup incubator curriculum

Market Research Associate (Intern), Nth Cycle

Feb – May 2020

  • Researched market share in lithium-ion battery manufacturing and recycling and turned it into an investor-ready portfolio

5K Fundraising and Operations Manager, O.C.E.A.N.S. Advocacy Group

Mar 2018 – May 2020

  • Ran a 5K fundraiser raising money for a local obesity support group

Student Roles, Duke University

2017 – 2018

  • Student Representative: earned awards for alumni donation results
  • Resident Assistant: oversaw 50 American Dance Festival students

Skills

  • Engineering: web and mobile app development, responsive web design, real-time AI features (voice, vision, screen share)
  • Growth: paid ads and ad network optimization, A/B testing, SEO and GEO, landing pages, referral programs, marketing and product analytics
  • Creative and partnerships: hiring and managing influencers, UGC creators, content studios and actors
  • Sales and operations: closing B2B deals, scalable customer support, startup operations, managing developer and design teams

Education

Duke University, Durham, NC · BA, Evolutionary Biology (Pre-Med track)

Athletics

Division I track athlete