Web App2025
Ledger AI Copilot
An AI copilot for finance teams that answers questions over live data with streaming responses and inline visualizations.
Ledger AI Copilot
- Client
- Ledger (fintech)
- Role
- Full-Stack Engineer
- Timeline
- 7 weeks
- Year
- 2025
-70%
Reporting time
<300ms
First token
5★
Internal NPS
The challenge
Finance users needed trustworthy, fast answers — hallucinations and laggy responses were non-starters.
The approach
We grounded the model in the customer's own data, streamed tokens for instant feedback, and rendered charts inline from structured tool calls.
The outcome
Teams cut routine reporting time dramatically and adoption spread by word of mouth across departments.
What I did
- Built the streaming chat + tool-call UI
- Designed the inline data-viz renderer
- Implemented retrieval grounding and caching
Tech stack
Next.jsTypeScriptLLM toolsStreamingPostgresRedis
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