#freelance hackathon ideas

3 ideas across 3 categories · 2 beginner · 1 intermediate · 0 advanced. Sorted by judging fit (editorial estimate).

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AI Agents
Overdue Invoice Follow-up Agent
An agent drafts polite, escalating payment reminders for overdue invoices
Beginner10h1–2
LLMGoogle SheetsEmail
17/20
Productivity
AI Invoice Generator
Creates clean invoices from plain text in seconds
Beginner12h1–2
Next.jsPDF libraryLLM
16/20
Web3
Freelancer Milestone Escrow
Holds payment in escrow and releases it per approved milestone
Intermediate36h2–3
SolidityFoundryviem
15/20

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