# Yossi Mlynsky

> Yossi Mlynsky is a New York-based founder, software engineer and product operator who built UpStack from the earlier Alt Tab mobile-development business into a global network for hiring distributed software talent. His career runs from Australian product roles at Kazaa, Monster, ninemsn, Bupa, BT Financial Group and Macquarie Bank to advising startups and writing about the changing craft of shipping software in the AI era.

- **Role:** Founder and CEO at UpStack
- **Organizations:** UpStack, Alt Tab Mobile, Sellerfy, MealPal, Monarq Incubator, The Aliya Institute, Macquarie Bank, BT Financial Group, ninemsn, Bupa Australia, CareerOne/Monster, Kazaa, Oneg Apps
- **Education:** Computer and Software Engineering, second-class honours, University of Technology Sydney, Visual Arts, University of Sydney
- **Known for:** Bootstrapped UpStack and publicly reports more than $55 million in cumulative revenue., Led UpStack through reported growth of 68% in 2020 and 100% in 2021., Built a distributed developer community spanning multiple countries and thousands of engineering profiles.

## Career timeline

- **2005-2007** — Worked as a product manager at Kazaa.
- **2007-2011** — Held product, business analysis and consulting roles at Bupa Australia, CareerOne/Monster, ninemsn, BT Financial Group and Macquarie Bank.
- **2010** — Founded the business that began as Alt Tab Mobile and later became UpStack; public company pages use 2010 as the founding date.
- **2015** — Began advising MealPal on product-team growth.
- **2016** — Became a community mentor at The Aliya Institute.
- **2018-2020** — Mentored women-led startups at Monarq Incubator on product decisions and growth.
- **2020** — UpStack reported 68% annual growth and $6.9 million in revenue.
- **2021** — UpStack reported 100% growth, a $12 million run-rate milestone and opened a Regulation Crowdfunding campaign; Mlynsky also co-founded Sellerfy.
- **2022** — UpStack's Wefunder campaign closed with about $392,000 raised from 325 investors.
- **2026** — Published essays and posts about AI-agent patents, AI-generated code and the changing meaning of the AI engineer title.

## Achievements

- Bootstrapped UpStack and publicly reports more than $55 million in cumulative revenue.
- Led UpStack through reported growth of 68% in 2020 and 100% in 2021.
- Built a distributed developer community spanning multiple countries and thousands of engineering profiles.
- Helped UpStack reach a reported $12 million revenue run rate in 2021.
- Advised MealPal on engineering-team growth and mentored founders through Monarq Incubator.

## Latest updates

- **2026-06** — Published an article examining AI-agent patents and what they suggest about emerging evaluation infrastructure.
- **2026-05** — Published 'Everyone can generate code now. Almost nobody can ship it,' arguing that generation has not replaced the discipline of production software.
- **2026-05** — Questioned whether fully automated content creation consistently matches careful human work and invited counterexamples.
- **2026-06** — Shared UpStack's appearance on a Times Square billboard and described the moment as a source of pride.

## Links

- Website: https://upstackhq.com
- LinkedIn: https://www.linkedin.com/in/ymlynsky
- Twitter/X: https://twitter.com/alttabdev
- Facebook: https://www.facebook.com/alttabdev/

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Profile page: https://yespress.io/yossi-mlynsky
Published by YesPress — https://yespress.io
Last updated: 2026-09-27