--- title: "From -$75k to +$500k Venture in 3 Years: Live Business Lessons, Raw Numbers | Fractional CTO" description: "My engineering leadership business hit $537k revenue in 2025, from $0 in 3 years. The lessons, the mistakes, and the raw numbers, stream by stream." url: "https://www.marian.coach/blog/build-500k-business-in-3-years/" lang: "en" image: "https://www.marian.coach/images/blog-covers/build-500k-business-in-3-years.png" --- ![From -$75k to +$500k Venture in 3 Years: Live Business Lessons, Raw Numbers](https://www.marian.coach/images/blog-covers/build-500k-business-in-3-years.png) **TL;DR:** Started $75k in debt (2023). Broke even (2024). Hit $537k revenue (2025) with profit across 9 streams: Fractional Advisory $239k (45%), Community $130k (24%), Mentoring $117k (22%), Workshops $51k (9%). --- ## 2023: The Starting Point In 2023, **I left a $350k** job offer to create an [engineering leadership coaching business](https://www.marian.coach/blog/from-vpe-to-solo-mentoring-year-one/), building Silicon Valley-caliber leaders in the heart of Europe through [**professional mentoring**](https://www.marian.coach/?page_id=7505) and the [Engineering Leaders Community](https://www.engineeringleaders.io/). The start was messy. I made every rookie mistake. The only reason I survived that first year was cashing out a small portion of [Mews](https://www.mews.com/en) stock options to **cover both business expenses and living costs**. --- ## **2024: The Break-Even Grind** 2024 was about proving the model works. We turned the Engineering Leaders Community into a 1,700+ member base of CTOs, VPEs, and engineering managers in Europe. **Mentoring** became the main revenue stream. Sessions with CTOs, VPEs, and engineering managers who needed a sparring partner. Someone who understood the technical side but could push them on **leadership**. > By end of 2024, I broke even. We **reinvested** the full profit back into the business. See my full [2024 rollercoaster business review](https://www.marian.coach/blog/2025-entrepreneur-strategy/) for the details. Why reinvest everything? Because I wasn’t building one tiny business. I see bigger potential: **Mentoring. Fractional advisory. Leadership academy. Community. Hiring platform. Conference.** A Disneyland. I believe we can build something extraordinary in 10 years if we keep marching in the right direction. --- ## 2025: The Year We Levelled Up Our engineering leadership business hit $500k revenue in 2025, growing from $0 to half a million in 3 years across 9 business streams. For the first time, we ended up in a profit. ![Marian Kamenistak laughing with both fists raised in celebration.](https://www.marian.coach/_astro/portrait-energy.BbDUthbN_ZYAzUj.webp) Celebrating the year we finally levelled up. ![Revenue split of $537k: Fractional Advisory $239k, ELC Community $130k, Mentoring $117k, Workshops $51k](https://www.marian.coach/images/blog-archive/2025/12/e2-1024x859.png)![2025 finance dashboard: income 15 186K against expenses 12 950K, EBITDA 2 197K at 15 percent, monthly cashflow bars](https://www.marian.coach/images/blog-archive/2025/12/e1-1-1536x1214.png)Cashflow analytics in Tableau. CZK currency. ### 1\. Mentoring: $117k [311 sessions this year](https://www.marian.coach/engineering-leadership-statistics/). 2,000+ total since 2023. With two more mentors we can rely on, we helped **57 individuals** handle their leadership journey. 33% were first-time managers dealing with [the transition from IC to manager](https://www.marian.coach/blog/guide-to-leading-your-new-dev-team/). The rest are directors, VP, CTO/CPOs level working on strategies or scaling challenges. ### 2\. [ELC](https://www.engineeringleaders.io/) Community: $130k Our community grew from 900 to 1,700 members. The community is free for members. Revenue comes from corporate partners who sponsor our meetups. We ran [11 high-quality meetups](https://www.engineeringleaders.io/events/), partnering with [Ataccama](https://www.ataccama.com/), [Microsoft](https://www.microsoft.com/cs-cz/), [Productboard](https://www.productboard.com/), [CodeNow](https://codenow.com/), or [Kiwi.com](https://www.kiwi.com/). Quality brings strong leads. For 2026, we closed [Pure Storage](https://www.purestorage.com/), Ataccama, and two super-magnificent partners we’ll reveal in Jan 2026. ![Row of engineering leaders in red conference seats, listening closely to a talk at an ELC meetup](https://www.marian.coach/images/blog-archive/2025/12/17-copy.png)![A speaker in a light blazer with a handheld microphone addressing seated attendees at an ELC community meetup](https://www.marian.coach/images/blog-archive/2025/12/2025-09-16-064-copy.png)![Attendees seated at small tables listening at an ELC meetup, a neon diamond sign glowing on the wall behind](https://www.marian.coach/images/blog-archive/2025/12/2025-10-30-42-copy.png)![Engineering leaders gathered at an ELC community meetup](https://www.marian.coach/images/blog-archive/2025/12/elc-meetup-14s-copy.png)![A packed ELC meetup at the Ataccama office, a speaker standing at a laptop under the neon Ataccama sign](https://www.marian.coach/images/blog-archive/2025/12/elc-meetup-17.jpg) Our meetups turn into 100+ events where people learn and **build connections**. With Anna Kozuch, our community CEO, we continue to reinvest to strengthen our core ventures. ### 3\. Academy Workshops: $51k 53 trainings delivered. **47 highly tailored workshops** across 7 companies. **6 open courses** in Prague. Module flexibility turned out to be key. [Build leadership courses that actually work](https://www.marian.coach/blog/leadership_courses_that_actually_work/). Forget certificates and slick slides. I hoped to merge and rebrand our edu **platforms**, [ITensity Labs](https://www.engineeringleaders.io/academy/) and [Leadership Program](https://www.engineeringleaders.io/academy/), by November 2025. We’re close to finalising it. ### 4\. Fractional Advisory: $239k Three major companies: **Trinity Bank, [Eurowag](https://www.eurowag.com/), and one under NDA**. 3 more in the 2026 pipeline. On-site work. ![Diagram illustrating a client's transition to a product operating model](https://www.marian.coach/images/blog-archive/2025/12/f1-product-operating-model.png)Transition to Product operating model![Team sprint efficiency dashboard from a fractional advisory engagement](https://www.marian.coach/images/blog-archive/2025/12/f2-team-sprint-efficiency-example.png)Team efficieny dashboards The assignment: - Turning companies into product trios of 30+ teams, - [enabling dev team efficiency](https://www.marian.coach/blog/how-to-build-trust-with-engineering-teams/), - [auditing](https://www.marian.coach/blog/how-to-build-trust-with-engineering-teams/) teams’ delivery and org structures, - or boosting joint leadership between the CTO and CPO. ![Leadership development workshop session for a fractional advisory client](https://www.marian.coach/images/blog-archive/2025/12/leadershnip-development-program-workshop-11-20-02-3-2048x1363.jpg)![A speaker in a black shirt presenting a Capturing Ideas slide on new initiative requests to a small boardroom group](https://www.marian.coach/images/blog-archive/2025/12/2025-11-07-10-3-1363x2048.jpg)![Attendees at a leadership development workshop for a fractional advisory client](https://www.marian.coach/images/blog-archive/2025/12/leadershnip-development-program-workshop-11-21-31-2048x1362.jpg)![With Zuzka, Jan, and Jirka leading the workshops for one of the clients.](https://www.marian.coach/images/blog-archive/2025/12/leadershnip-development-program-workshop-11-04-11-2048x1365.jpg)With Zuzka, Jan, and Jirka leading the workshops for one of the clients. And yes, there’s a point where you should [fire your consultant](https://www.marian.coach/blog/11-signs-to-fire-your-consultant/), including me. IMO, **an advisor should move across companies often,** as it makes them stronger. I’m convinced that being a consultant at a company for several years is harmful to both the company and the consultant. ### 5\. ELC Conference We launched the [ELC Conference](https://elc-conference.io/) for 350 people in Prague. High-risk experiment. Top speakers from [Netflix](https://www.netflix.com/browse), [SpaceX](https://www.spacex.com/), [BetterStack](https://betterstack.com/), [Incident.io](http://incident.io/), [Bloomreach](https://www.bloomreach.com/en), or [Make.com](http://make.com/). It turned into a super-success. Here’s a full [ELC 2025 conference recap](https://www.marian.coach/blog/engineering-leaders-conference-elc-2025-recap/) about how it sparked a leadership revolution in Europe. ![Marian Kamenistak speaking on stage at the Engineering Leaders Conference.](https://www.marian.coach/_astro/action-stage-elc.Cb5pIi17_WecRK.webp) On stage at the Engineering Leaders Conference — the high-risk experiment that paid off. #ELC2025 Aftermovie | 25 Speakers, 330 Engineering Leaders, Unforgettable Impact - YouTube Tap to unmute [#ELC2025 Aftermovie | 25 Speakers, 330 Engineering Leaders, Unforgettable Impact](https://www.youtube.com/watch?v=HGTIw0y_ANM) [Engineering Leaders Community](https://www.youtube.com/channel/UCGM_VMs2jWM9NFdD9ep9FTg) ![Engineering Leaders Community YouTube channel avatar, a pink and blue petal-shaped mark](https://yt3.ggpht.com/DmFmc85BTrO2gpgyQUiNHoqPouUPGxecDnL8eUkGhv7uLXBwA_TzsLqraPU7nPtNO3D8dVX5YA=s68-c-k-c0x00ffffff-no-rj) Engineering Leaders Community170 subscribers [Watch on](https://www.youtube.com/watch?v=HGTIw0y_ANM) April 2026 ELC conference will be epic. ### 6\. Product Leaders Community With Jirka and Anna, we started regular [Product Leaders Community](https://luma.com/calendar/manage/cal-tPYCsaYxE7Sn8z5?period=past) meetups. The reason: I believe **product manager and engineering manager roles will blend**. No PM survives without engineering. No engineer survives without understanding value delivery from idea to production. ![Attendees networking at a Product Leaders Community meetup](https://www.marian.coach/images/blog-archive/2025/12/product-leaders-community-11-20-063-2048x1363.jpg)![product leaders community 11 20 133](https://www.marian.coach/images/blog-archive/2025/12/product-leaders-community-11-20-133-2048x1363.jpg)Product Leaders Community meetup in 2025Q4![Speaker presenting to the room at a Product Leaders Community meetup](https://www.marian.coach/images/blog-archive/2025/12/product-leaders-community-11-20-083-2048x1363.jpg) ### 7\. University partnerships We also partnered with the [University of Economics in Prague](https://www.vse.cz/) to launch an [MBA in IT Management course](https://databusiness.cz/english/mba-it-management-business-transformation-powered-by-it-leaders/). I’m happy to be the lead **lecturer** for IT Leadership, starting in Feb 2026. ![Guests at a company evening raising hands and applauding around cocktail tables with wine glasses](https://www.marian.coach/images/blog-archive/2025/12/MBA-leadership-in-IT.jpeg)With Ota Novotny and MBA students![MBA with Ota](https://www.marian.coach/images/blog-archive/2025/12/MBA-with-Ota.jpeg) ### 8\. Tamira AI With Jan, we launched [Tamira AI](https://www.tamira.ai/). A **Team Leader AI Agent** for healing dev teams. Currently in pilot. The thesis: AI won’t replace managers, but managers using AI will outperform those who don’t. [![Tamira AI landing page headline Team Leader AI Agent Healing Teams with Join the Beta and How It Works buttons](https://www.marian.coach/images/blog-archive/2025/12/1z95nbeT4-9tlQuUC_Ny56A.png)](https://www.tamira.ai/) Tamira.ai ### 9\. Marian’s List In 2025, the hiring market froze. But top performers still get **crazy offers** while the rest ask for help. Through [Marian’s List](https://marianslist.com/) we helped **11 individuals land jobs**, mostly in 2025Q1. 180+ people registered, **40+ in active matching mode**. For example, people ask for help with imposter syndrome. They struggle to articulate their achievements in interviews. This is why I wrote about [10x-ing your market value](https://www.marian.coach/blog/10x-your-market-value-tech-leader-8-steps/) to help with precisely this problem. [![Marian's List matching dashboard listing anonymised candidates with growth scores from 2.0 to 4.0, location and work mode](https://www.marian.coach/images/blog-archive/2025/12/1DdbPH_R-Gp5TmvihhQO1EA.png)](https://www.marianslist.com/scoring-system) Open candidate list --- ## Lesson #1: Sustaining the business Creating a successful business is fun. Sustaining it is exhausting. It requires discipline. Clients demand super-high quality. - Mentees want [strong KPIs we’ll hit in 3 and 6 months](https://www.marian.coach/get-your-company-to-pay-for-mentoring/) - Community partners want great events, venues, speakers, networking, and social media presence - Fractional clients want on-site advisory and availability for the 9pm calls > Our ambitions grow faster than our capacity. That’s the tension we live with. ## Lesson #2: People above all We’re community-centric and people-centric. **AI won’t kill us**, because finding reliable business partners is key. They do exist. People who don’t just talk but execute. Hiring includes firing sometimes. > Losing one major contributor could mean one year of lost opportunity in the market. ![Marian Kamenistak with four community organisers at an outdoor evening event in a courtyard garden](https://www.marian.coach/images/blog-archive/2025/12/1gqKBvPyjo9TwYQNIcLB9xw.jpg)With our core community group Building alone is a myth. [Anna](https://www.linkedin.com/in/anykozuch/) is the main community engine. [Tom](https://www.linkedin.com/in/tomkos/) does does magic with his flawless design skills, [Miru](https://www.linkedin.com/in/mirkahofmanova/) making conference miracles happen, [Jirka](https://www.linkedin.com/in/jirihelmich/) covering the product as a true master I have a lot to learn from, [Jan](https://www.linkedin.com/in/jan-vrtiska/) our ambassador and steering member, [Ivo](https://www.linkedin.com/in/ivoklimsa/) our super-proactive ambassador, [Denisa](https://www.linkedin.com/in/denisarybn%C3%AD%C4%8Dkov%C3%A1/) helping us with the brand, [Marki](https://www.linkedin.com/in/markta-krejci-snizkova/) organising meetups, [Jakub](https://www.linkedin.com/in/ruzicka-jakub/) our #1 person being available no matter what, [Klara](https://www.linkedin.com/in/klaralosert/) our strategy and community coach, [Serhii](https://www.linkedin.com/in/sbotulinskyi/) helping us with the video content, [Yurii](https://www.linkedin.com/in/iuriibliuchak/) covering the digital community footprint, [Adrian](https://www.linkedin.com/in/adriankamenistak/) with the video post-production, or Alaa with the copy. --- ## In the mirror I struggle with how open to be. Some people question it, including posts like this. Transparency about strategy, finance, materials, and crazy ideas. It sometimes backfires and upsets people. I’m okay if 5% of things go bad. I mean, very bad. **Perfection kills**. Luckily, [Radical Candor](https://www.radicalcandor.com/the-book) works in our environment. The second thing is that by the end of 2025, I struggled to allocate time properly. Quality suffered in some areas due to exhaustion. That’s on me. [![LinkedIn post by Marian Kamenistak opening with the line that he made 400k plus in 2025 and is exhausted](https://www.marian.coach/images/blog-archive/2025/12/1m1Pj_ZddQ61-embbXX67DA.png)](https://www.linkedin.com/feed/update/urn:li:activity:7403750194485514240/) ### My 2026 commitments 1. I’ll work with a **speaking coach**. Moderating and conference speaking need improvement. I know my weaknesses. 2. Reading “The Qualified **Sales Leader**” by John McMahon. Sales is a skill I avoided for 20 years. Time to fix that. > I’m not good enough at selling our mission as I feel obsessed with it. --- ## What’s in it for you? **If you’re [an aspiring speaker](https://www.marian.coach/speaker/),** tell us what topic you could speak about at a meetup or conference in 2026. [Submit your talk](https://www.engineeringleaders.io/). **If you want to partner with ELC to strengthen your mission, brand, or revenue,** [check our deck](https://www.engineeringleaders.io/partner/). **If you need [a strong mentor](https://www.marian.coach/blog/how-to-find-a-great-mentor/),** we’d be happy to [boost your career](https://www.marian.coach/?page_id=7505) and value in the market. **Are you building your own venture?** I’d be happy to share my lessons learned. **If you want to help our mission,** raise your hand and ping Anna or me. We look for true ambassadors, reliable mentors, and volunteers in love with our mission. --- Thanks to everyone supporting us! > We’re building Silicon Valley-caliber leaders in the heart of Europe. The momentum is here. 2026 is ours. --- \[Writing time: 9h\] Fractional CTO ## Bring senior engineering leadership in — without a full-time hire. 10 productised engagements from €24k. Fixed scope, fixed price, fixed timeline. Past clients: Mews, Jablotron, Eurowag, Kosik, Dr Max, Innovatrics, Pure Storage. [See engagements →](https://www.marian.coach/fractional-cto/) ## Read next - [ ### Fractional CTO for Startups: What It Is, What It Costs, When You Need One What a fractional CTO for a startup does, real market rates, and the 6 signals you need one. Written by a fractional CTO who has run the model since 2023. 10 July 2026 · By Marian Read → ](https://www.marian.coach/blog/fractional-cto-what-it-is-cost-when-you-need-one/) - [ ### 11 Red Flags It’s Time to Fire Your Consultant Too many consultants linger without results. Spot the 11 red flags that signal it’s time to fire your consultant, end dependency, and reclaim control. 13 August 2025 · By Marian Read → ](https://www.marian.coach/blog/11-signs-to-fire-your-consultant/) - [ ### Should I Become a Team Lead? A 6-Dimension Answer Six dimensions predict whether the team lead role will fit you, drawn from 3,400+ mentoring sessions. Take the 3-minute test, get a straight verdict. 22 July 2026 · By Marian Read → ](https://www.marian.coach/blog/should-i-become-a-team-lead/) ### New posts, straight to your inbox. Your emailSubscribe You're on it. Nothing hits your inbox today. First send goes out once the list is live, and you're already on it. 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