2 engineers replaced a legacy billing system in 6 months, merging 122 PRs in 90 days
alex_verem · x · 2026-10-08
A detailed case study of AI-assisted delivery: a logistics orchestration company was quoted 7-8 months to replace its legacy billing system. With two embedded engineers, the replacement shipped in six months, merging 122 pull requests in the first 90 days.
- The old system handled billing across shippers and logistics providers, so the team had to rebuild invoicing, cost calculations, approvals and disputes while keeping logistics operations running and financial data consistent.
- The team wrote no code in week one, instead scanning and mapping the existing systems first — the author stresses that "we used AI and it was faster" helps no one without the method.
Related event: Two Engineers Replace Legacy Billing System in Six Months with AI(2 posts)→
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