Rafomac News, Tech & Trends That MatterAngus Chang quietly built a straightforward website that now generates $40,000 a month. The catch? He runs it all by himself, without any external funding or employees. Here’s how a simple problem and a lean approach transformed his life.
Finding Gold in a Simple Problem
Angus Chang was fresh out of his day job in Hong Kong when he stumbled upon the idea that launched his SaaS business. He simply wanted to understand his personal finances better, to see how long his savings would last. But the hurdle was real: his bank statements came only as PDFs, making it nearly impossible to analyze spending trends easily.
Instead of searching for a ready-made solution, Angus wrote code to extract transaction data from those PDFs himself. This personal struggle revealed a much wider pain point, sparking the idea behind Bank Statement Converter.
From Side Project to Real Users
Angus quickly built a minimum viable product (MVP) within a week, teamed up briefly with a friend to develop a user interface, and launched the site. To gauge interest, he bought Google ads and watched people start uploading bank statements immediately. This early validation confirmed he had not only an idea but a business opportunity.
Despite trying Google’s search ads, Angus soon realised ads were a money sink. He’d spend $1,000 in ads and generate only $300 in revenue. Beyond paid ads, blogging and cold emailing fetched barely any users and a fair share of annoyed responses. He eventually cut all paid advertising and focused purely on improving the product based on real user feedback.
Bootstrapped Success and Solo Hustle
Angus runs the entire operation solo — coding, customer support, marketing, and sales. His business steadily grew from $6,000 monthly recurring revenue (MRR) in 2022, to $14,000 in 2023, then $27,000 earlier this year, and now stands at about $40,000 MRR. Around 75,000 users have used the service with roughly 2,000 paying customers.
Running a one-person SaaS is not without its challenges. Angus recalls the isolation of solopreneurship — losing daily social contact from former coworkers and feeling misunderstood by friends who doubted the business’s potential early on. But the flexible schedule and ability to target a niche market without VC pressure balance that out.
Building Focused on Real Business Impact
His tech stack is straightforward but effective: a Kotlin backend console application evolved into a web service with a Next.js frontend, hosted on AWS and Netlify. Payments go through Stripe, and transactional emails are handled by Brevo. Angus keeps it simple and highly profitable, with around 98% of revenue translating to profit.
His approach is lean startup in action — launch fast, learn fast. He ignores social media distractions, choosing to build features only when users validate they’re needed. Analytics and direct user feedback steer where time and effort go.
Lessons for Solo Founders
What would Angus tell his earlier self if he could go back? Save enough money to survive multiple years without income, because SaaS businesses often don’t pay off immediately. Forget chasing social media followers as a business strategy—it’s better to focus intently on building something people genuinely need.
This unglamorous but persistent approach has turned a simple code project into a sustainable and growing revenue stream. Anyone with a solid coding skillset and an eye for real problems can replicate this pathway.
Angus Chang’s story is a blueprint for turning minimalist, personal solutions into profitable niche SaaS. No employees, no VC funding, no fluff—just solving a concrete problem and evolving with real user input.
