Hi, I’m Bart Stemkens ✋ I am an Amsterdam-based independent Growth Hacker.
With 8+ years of experience in digital marketing and building start-ups, I take a holistic approach that combines data analytics, branding, CRO and performance-marketing. I have a strong focus on app-based companies.
As an all-around marketer, I've developed and implemented strategies for a wide range of clients, including pre-product/market fit startups, agencies, corporates, and accelerators, driving digital growth. I have extensive experience in Ed-tech, corporate innovation, social media companies, FMCG, and prop-tech industry.
Availability: 2 days per week as of April 15th, 2025 (updated: March 30, 2025)How can I help? Wether you’re a potential client or a fellow consultant or entrepreneur, I love talking to other people at any time, for any reason.
About me
- I’m entrepreneurial - I like the spirit of problem solving and creating something new and valuable.
- I like adrenaline sports - While I'm not responding to your emails, I'm most likely planning my next road trip on my motorbike, kitesurfing in the North Sea, cruising one of Amsterdam's beautiful skateparks, or on a hiking trip with my girlfriend, Joeke.
- I like breaking the rules of business: My strong desire for risk-taking adventures and boundary-pushing has cultivated a strong preference for brands that are truly bold and unique, unafraid to stand out from the crowd.
- I am purpose driven - I thrive on a sense of meaning. I’m committed to using my skills and passion to build digital solutions for real life problems.
- I’m a culturally curious - As a xenophile, I have a strong interest in people and other cultures, which has allowed me to become fluent in four languages: Dutch, English, Spanish, and Portuguese.
What I do
- User acquisition + retention
I set up and optimize multi-channel user acquisition campaigns that drive sign-ups, whether it involves long-term tactics like SEO and PR or Performance Marketing and CRO. With a track record of on-boarding millions of users for several apps, I am well-versed in retention strategies and effective UX design that lead to product-led growth.
- Data analytics
A clear KPI plan, real-time dashboards, and the right tracking infrastructure ensure a result-driven approach. I am accustomed to working with dynamic data, including product and marketing datasets, and am skilled in turning this data into actionable insights.
- Strategy design
I specialize in navigating untested markets. My expertise includes market research, pricing strategies, KPI planning, user interviews, and value proposition design. With extensive experience in various companies and markets, as well as collaborations with numerous founders, I have developed profound expertise in crafting robust business models.
- Business development
A holistic marketing approach goes beyond optimizing ad campaigns. Unlike traditional growth hackers, clients can expect me to help identify new business opportunities, pitch, present, negotiate, and build long-term relationships.
Client cases 📈
2023 - 2024
2020 - 2023
2020 - 2022
2021 - 2022
Testimonials
Brands I’ve worked with
A glimpse of industry-leading brands I’ve had the pleasure of working with.
Schedule a call or reach me at hello@creatorsinnovators.com