He Made $30K/Month Selling Wallpapers — Now He Monitors the Entire Internet for Brands

In this episode of Junior Founder, host Azad sits down with Marcos — a developer-turned-solo-founder, agency owner, and builder of two SaaS products — to talk about what it really takes to spot opportunities, validate fast, and build things people actually want. Marcos shares his full founder journey: from accidentally making $17,000–$32,000/month selling wallpaper apps on the Barnes & Noble Nook tablet back in 2010, to running a developer relations agency for Series A & B startups, to building two AI-powered SaaS tools almost entirely on his own. 🔧 His two products: → Linking Tail — LinkedIn analytics that finally makes sense of your data → Mention Drop — AI-powered brand & competitor monitoring across 8 billion web pages per day (launched just 1 month ago, already 100 users) 💡 What you'll learn in this episode: • How to stumble into a niche and turn it into real revenue • Why you should sell before you build (and what "validating fast" actually looks like) • How to use Reddit, Facebook groups & HMRC data for lead generation • Why Marcos turned down VC money — and why bootstrapping keeps your product better • How Mention Drop filters AI-contextual brand mentions across every language on the web • The feedback loop strategy that shapes his products (hint: real emails, not automation) • Why investors care more about YOU than your user count 📌 Key timestamps: 00:00 — Welcome & Marcos's background 01:13 — First business: Wallpaper apps on the Nook tablet (2010) 05:00 — Making $17K–$32K/month with a self-building app factory 07:00 — Incorporating his first company & when competition killed the niche 10:30 — Moving into Developer Relations at Twilio (7 years) 13:00 — Why he left to start his own agency 14:28 — Building Linking Tail: LinkedIn analytics you actually need 17:00 — The product-led growth mindset & personal feedback emails 21:06 — Building Mention Drop in a single weekend 23:14 — Enterprise tools charge $300–$500/month — he built an accessible alternative 26:00 — Reddit lead gen & notifying founders about podcast opportunities 29:00 — The electrician Facebook bot story & intent-based outreach 35:30 — HMRC data, clean leads & the blue ocean of unlisted contacts 39:28 — Building domain authority through competitor mention outreach + affiliate program 44:24 — Why Marcos is not taking VC money right now 51:19 — Advice for early-stage founders: sell first, build fast, pivot without pride 55:46 — Investors invest in YOU, not your user count 58:12 — Plans for a follow-up episode in one year 🔗 Check the links below for Marcos's tools & any discount codes shared. --- 🎙️ Junior Founder is a podcast for early-stage founders navigating startups, ideas, and entrepreneurship. New episodes dropping regularly. #JuniorFounder #SaaS #IndieHacker #Bootstrapped #StartupPodcast #SoloFounder #ProductLedGrowth #BrandMonitoring #LinkedInAnalytics #MentionDrop #DeveloperFounder #Entrepreneurship