Legacy system migration — AI reads your 10-year codebase
PHP monoliths / Java SSH / .NET WebForms — we've done them all. AI toolchain lets one developer safely migrate a core module in weeks.
Legacy modernization fails when teams attempt big-bang rewrites. BCD's approach: AI-assisted incremental per-module migration. AI auto-reads the legacy codebase and generates complete documentation; the human makes architecture decisions on top of that. New and old systems run in parallel, traffic is canary-shifted, the new system gets 100% test coverage before the old one is retired — zero downtime throughout.
Per module, typically 4-8 weeks
From $1.5k / module · custom quote
Per-module deliverables
AI-generated full API documentation of the original system (most clients lacked this)
Complete new-stack implementation (code + tests + deployment)
Old/new dual-write canary cutover plan + rollback playbook
Data migration scripts (one-shot bulk + ongoing incremental sync)
Full integration test report after cutover
A finance customer had a 12-year PHP monolith. Core auth + billing modules needed to move to Node.js + React. BCD's first phase delivered in 4 weeks: AI auto-documented all 187 APIs of the original system + full new-stack auth module + dual-write cutover + complete tests. Zero downtime go-live. 6 more modules rolling out monthly.