How Fernando built two AI SaaS apps to $15K MRR as a solo founder

Executive overview

Most solopreneurs fail by targeting wide markets with bloated products. Fernando Pessagno built two focused AI tools — ResumeMaker.Online and AI Carousels — by niching into validated markets and stripping features to their core.

He runs both products alone, with ~90% margins and only four hours of work per day. The key insight: big companies can't afford to be laser-focused, so solo founders can outcompete them by solving one specific problem exceptionally well.

Niche down until you only need 0.1% of the market — then own it.

Finding ideas worth building

• Scratch your own itch: spot time-consuming tasks and simplify them into a single-purpose tool
• Target validated markets, then differentiate on approach — not features
• Big platforms (Canva, etc.) must serve everyone; a solopreneur can serve one use case better
• The value proposition: "I don't sell design, I sell time"
• Avoid bloat — most users want the simplest path to a good-enough result

Building and validating fast

• Fernando used a 10-day public build challenge for AI Carousels after being unexpectedly fired
• Launched a barebone MVP: basic text carousel, minimal polish
• Early user feedback shapes direction — launching rough lets feedback tell you where to go
• Product Hunt launch yielded five paying customers on a buggy product — proof of real demand
• If it fails fast, you move on without attachment; long build cycles create emotional risk

Distribution and growth

• SEO is the primary channel for both products
• Built ~30 free tools as natural extensions of each product to drive organic traffic
• Product Hunt launch generated backlinks and fast early spread; ResumeMaker won Product of the Week
• Building in public on Twitter and LinkedIn adds personal reach
• Affiliate program launched for both products (early stage, still developing)

Pricing and revenue model

• AI Carousels launched at $9.99 (beta); now $14.95 — positioned as affordable, not cheap
• ResumeMaker shifted from one-time purchase to SaaS subscription for predictable revenue
• One-time purchases reset revenue to zero each month — subscriptions remove that anxiety
• Churn strategy: expand the tool suite so users come for carousels and stay for the full package

Operations and tooling

• Total costs: ~$1,000/month; margins above 90%
• Tools: Notion for organisation, Outseta for billing/CRM/subscriptions (no-code)
• Occasional freelancer for content tasks only — no full-time employees
• No co-founder; solo operation by design

Customer support as a growth lever

• Fast replies turn frustrated users into loyal fans
• Bug fixed within an hour of a report = strong retention signal
• Both products have an About page that explicitly names Fernando as the sole founder
• Emails use "I" not "we" — leans into being small rather than hiding it
• People prefer dealing with a founder directly over a faceless company

Working four hours a day

• Fernando deliberately cut to four hours of focused morning work after burning out
• The constraint forces prioritisation — only high-impact tasks make the list
• Works every day including weekends to maintain momentum
• Business improved after reducing hours: more clarity, better decisions
• Optimises for life quality, not revenue maximisation