Stratascratch

Nathan Rossidi was an adjunct professor teaching non-technical students analytics at a local SF university when he encountered a recurring problem: setting up SQL servers, databases, and datasets for students was a massive headache. Students didn't know how to configure the infrastructure, and Nathan found himself spending precious class time troubleshooting technical issues instead of teaching. He recognized a gap in the market—there was no platform that let aspiring data scientists and analysts practice real technical interview questions from major tech companies. Most importantly, he wanted to solve his own problem and make teaching more efficient.

With his existing technical skills in backend development and a developer who had worked with him on previous projects, Nathan moved fast. In less than a month, he cobbled together a minimal viable product: a basic backend with a database seeded with SQL practice questions (drawing from his university teaching materials) and an open-source IDE grafted onto the front end. "It was probably like 10 hours of work on my side, 10 hours work on his side," he recalls. He launched it free to his students and the public to gather feedback before charging.

His initial instinct was to charge immediately—no free tier, just a paywall. It failed spectacularly: zero signups for months. A friend gave him the breakthrough advice: "Nobody trusts you. You're a small company. Nobody even knows your brand. Why would anybody pay for it without using it first?" Nathan quickly pivoted to a freemium model where users could explore the platform free, then upgrade to premium. Signups came immediately. He kept the free tier open for his university students while adding a payment portal for the public.

Nathan experimented with multiple growth channels—email outreach, Google Ads, and others—but none delivered exceptional results. He read "Traction" by Justin Mayers and realized he should focus on one or two channels rather than scatter his limited 5-10 hours/week across many tactics. Content marketing became his answer. He began writing articles about becoming a data scientist, drawing from his own struggles climbing the career ladder, publishing on Medium and data science publications. Each article was an experiment: he could measure upvotes, shares, and readership to understand what resonated. Unlike paid ads (which take months to evaluate), blog posts provided rapid feedback loops.

By early 2019—two years after launch—Stratascratch had reached 2,500 registered users and $1,500 MRR. Nathan continues running the platform as a passion project, spending 5-10 hours weekly alongside his full-time job and teaching. His advice to other aspiring founders is deceptively simple: get deeply involved in your target community (Reddit, Slack, meetups), understand what they actually want, and only build if it aligns with your own passion. "Talk to the community, be involved in the community," he emphasizes. "See if what you're thinking and what you're thinking is valuable, they also find valuable."