Solo Developer Builds $15K MRR SaaS by Solving His Own Problem

Executive overview

Ben Bozzay spent years launching side projects that went nowhere before stumbling into one that worked — not by being more inventive, but by solving a real problem he had himself. He built Tech Lockdown, a subscription platform that lets adults block websites and manage internet habits, reaching $15K monthly recurring revenue with 1,300 customers. The core insight: validate demand through free content and audience-building before writing a single line of product code. When he was laid off in 2023, the business was generating $3K/month; by doubling down instead of returning to employment, he grew it 5x. Profitability is achievable at 70%+ margins because infrastructure is cheap and customer acquisition came through content, not paid ads.

Why earlier side projects failed

• Lead generation platform: obsessed over logo, colors, and naming; never solved the customer acquisition problem
• Landing page builder: overcomplicated the build, burnt out before shipping
• Co-founded a web agency with two others; ran it 2.5 years but found it operationally difficult and ultimately shut it down
• Common thread across failures: shipping never happened — too much time on presentation, not enough on the simplest viable version

How Tech Lockdown started differently

• Originated from a personal problem: work-from-home in 2020 made intentional internet use hard
• Researched and built a system for himself, then distilled it into a YouTube video and a Reddit post
• Inbound demand arrived immediately — messages, emails, consulting requests — before any product existed
• Spent a full year building free content and an audience before monetizing
• Had no logo until he had several hundred paying customers — zero time wasted on branding

Juggling a day job and a side project

• Early morning block (5:30–8:30am) reserved for high-focus development work
• Evenings used only for lower-cognitive tasks like marketing and content
• Chose content marketing as the single acquisition channel because it was energizing, not draining — key rule: pick a channel you won't dread
• Stayed laser-focused; any free time went to the highest-leverage task only

Growth and marketing strategy

• Core tactic: deeply researched, free, highly specific content — guides written for a niche audience already searching for answers
• Top-performing piece: a step-by-step guide to converting an iPhone into a dumb phone; read hundreds of thousands of times
• Reddit strategy: lead with all the valuable content inside the post itself; reference the video or guide only as a footnote — drives engagement, increases chance of front-page visibility, and pulls curious readers deeper into the funnel
• 2 million organic visitors over two years; 20,000-person mailing list built without paid acquisition
• Authenticity as competitive advantage: most competitors are faceless corporate apps; writing as "I" rather than "we" built trust with a wary audience

Business model and metrics

• 14-day free trial; $15/month or ~$10/month on annual plan
• 1,300 customers, $15K+ MRR
• Target metric: annual plan conversion (monthly churn is high; annual retention is the goal)
• Infrastructure costs are low; all-in profit margin comfortably above 70%

Tech stack decisions

• Supabase for database and authentication — chosen for speed, not cost
• SvelteKit for the web app — more accessible than React for a solo JS developer
• Render for hosting at $20/month — continuous deployment and peace of mind worth the premium over self-hosting
• Mailgun + Elastic Email for transactional and marketing email (~$150/month at scale)
• Google Gemini, Ahrefs (light plan), Plausible Analytics — Plausible checked daily as the primary growth signal

Playbook for finding and validating a side project idea

• Pick something with a simple, shippable v1 — if there is no stripped-down version you can release, reconsider
• Build a topic-specific audience first, before the product exists — not a general social following, but pre-qualified potential customers
• Solve a problem you're genuinely passionate about; passion is what sustains early-morning sessions after a full workday
• Never start a side project just to escape a bad job — if the job is the problem, get a better job instead

Key lessons on building a sustainable business

• Making money with a side project is not hard; making it a viable business is the real challenge
• Many side projects are "selling a dollar for 90 cents" — they appear to work until unit economics collapse at scale
• Customer acquisition cost must be low enough to sustain and grow without outside capital
• Don't overcomplicate the product; most side projects never ship because they never reach "good enough to release"
• Distill to the core feature set, test it, build the audience in parallel, and iterate from there