Legacy Modernization Sprint
A production-first sprint that delivers a real release — plus a safe path to modernize without breaking the business.
When legacy slows you down — and you need safe momentum.
- A legacy module is blocking growth or reliability
- You need a safe migration path (not a “big rewrite” fantasy)
- You want momentum and proof in production quickly
Not a fit if
- You want a complete rewrite in one go
- You can’t provide any access, feedback, or deployment pathway
Outcomes
What you’ll ship after 4–8 weeks
Target architecture
Long-term vision + incremental migration strategy
Working vertical slice
Shipped to production (or production-ready)
Automated test baseline
Security and functional coverage for touched areas
CI/CD hardening
Improvements necessary to ship safely and frequently
Operational readiness
Cutover + rollback plan and documentation
Typical sprint shapes
Option A: Strangler Pattern Start
Wrap the legacy, route new flows to a new service, migrate incrementally.
Option B: Integration Stabilization
Fix broken data flows, implement stable interfaces, remove manual workarounds.
Option C: Performance Hardening
Eliminate hotspots, add observability, reduce incidents, improve deploy safety.
What’s included
Scope lock
Clear acceptance criteria to avoid ambiguity
Architecture decisions
Documented in ADRs for future reference
Implementation
Built with quality gates (tests, review, readiness)
Observability
Logs, metrics, and alerts where feasible
Handover
Documentation and kickoff for your team
How we avoid drama
Discovery
Scope lock and technical deep-dive
Architecture
Target design and migration plan
Build
Vertical slice implementation
Readiness
Ops review and cutover prep
Release
Safe cutover and handover
Timeline & pricing
Complexity and target scope dependent
What drives cost
- Number of internal systems involved
- Data migration complexity (volume/schema)
- Deployment constraints (downtime windows)
- Existing quality baseline (tests/CI/CD)