I built a 1,334-challenge coding platform solo with Lovable, Supabase, and Claude — here's what actually worked
Dev.to / 6/3/2026
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Key Points
- The article describes how the author built a solo coding platform with 1,334 challenges using Lovable for the frontend, Supabase (including edge functions) for backend logic, Judge0 for code evaluation, and Claude-based edge functions for an AI mentor and autonomous outreach emails.
- It highlights a major operational pitfall: using two separate Supabase projects—one created automatically by Lovable and another used for the author’s real backend—can lead to deployments, API keys, and scheduled jobs going to the wrong place.
- The author explains two time-wasting bugs that were not in the application code itself: a hardcoded challenge progression that exposed all worlds and an outreach pipeline that produced “clicks” from automated link scanners rather than real human engagement.
- The piece emphasizes verification discipline: tools like Lovable may report “COMPLETE” even when the live site is still broken due to CDN lag or fixes landing in the wrong component, so changes must be checked on the live domain.
- The author also discusses the less-talked-about effort of building an autonomous Claude-driven sales agent that can read replies, score them, choose follow-up strategies, draft emails, and send them on a schedule without manual intervention.
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