Jaroslav Bartak
Product Builder
Product Manager. I love everything about technology and I especially love building cool products.
Get in Touch Product Strategy AI and Automation Monetization & Subscriptions Adtech & Programmatic Analytics & GA4 ML-driven Personalization
Blog
All posts →Featured Projects
ClashRankings
Website with statistics, rankings and articles about sports organization Clash MMA.
Mcstate.net
All-in-one Minecraft toolkit — server status, player lookup, skin editor, enchantments & more.
Work Experience
GOOD PEOPLE media, s.r.o.
Product Manager
Dec 2024 — Present- Leading the strategy, development, security, BI, and monetization of a portfolio of 16 digital media brands with a combined reach of hundreds of thousands of daily readers.
- Owning end-to-end product strategy across publishing platforms, aligning business goals with technical execution and data-driven decision-making.
- Managing monetization models including advertising, subscriptions, and performance optimization across the entire media network.
- Overseeing analytics, security, and performance to ensure scalability, reliability, and sustainable revenue growth.
- Coordinating cross-functional teams including development, editorial, BI, and marketing to deliver continuous product improvements.
VLTAVA LABE MEDIA
Product Manager – Paywall, Yield & Analytics
Dec 2023 — Nov 2024- Increased programmatic advertising revenue by 9% YoY through optimization of ad delivery and yield management across the media portfolio.
- Achieved a 20% YoY growth in active subscriptions by improving paywall strategies based on user behavior analysis and research.
- Boosted newsletter CTR by 10% by transforming the newsletter system into an ML-driven solution learning from user behavior.
- Owned paywall strategy including access models, pricing experiments, and collaboration with development, marketing, and content teams.
- Managed advertising systems to ensure fast, reliable, and compliant ad delivery across all VLM websites.
- Responsible for GA4 implementation, event tracking accuracy, and resolving cookie consent and measurement issues in cooperation with BI stakeholders.
RONDOgo
Product Manager
Nov 2022 — Nov 2023- Increased monthly revenue by 30% by launching a new rewarded ads-based revenue stream using gamified content mechanics.
- Successfully expanded the product to new markets in Hungary and Romania.
- Owned the full product lifecycle including product discovery, market research, competitive analysis, roadmap planning, and feature delivery.
- Created user stories and requirements and ensured timely releases across all platforms (rondo.cz, rondogo.sk, rondogo.hu, rondogo.ro).
- Managed GA4 and GTM implementations, created data reports, and collaborated with marketing on conversion tracking.
- Led development of internal backoffice tools including order processing, invoicing, internal modules, and competition prize planning.
Heureka.cz / sk
Content Editor – Auto-moto
Sep 2021 — Oct 2022- Managed and improved the Auto-moto product catalog with over 12 million products on heureka.cz and heureka.sk.
- Ensured high data quality across the automotive segment, including categorization, attributes, and content consistency.
- Prioritized and fulfilled requests from stakeholders including users, SEO, product, sales, BI, development, and customer success teams.
- Participated in user testing such as A/B tests and surveys to validate content and product changes.
- Collaborated internationally with content teams across the company.
- Prepared development inputs including bug reports, admin improvements, and data reports.
- Supervised and coordinated external contributors.
Vězeňská služba České republiky
Correctional Officer
Apr 2018 — May 2021- Responsible for the custody, supervision, and control of inmates within a detention facility.
- Maintained order, security, and safety while enforcing institutional rules and regulations.
- Developed strong skills in communication, conflict resolution, teamwork, and stress management.
About Me
I’m a PM who gets uncomfortable when things are done manually. If something can be automated, I’ll probably spend a weekend building it in n8n or Python before admitting it might’ve been faster to just do it by hand.
By day I run product across 16 digital media brands: paywalls, ads, analytics, the works. By night I’m tinkering with AI workflows, scraping things I probably shouldn’t, and building APIs.
I like understanding how things actually work under the hood. That curiosity is what got me into product, and it’s what keeps me writing code even when I don’t have to.
