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Production AI systems and digital engineering for enterprise teams.Explore our work
Production AI systems and digital engineering for enterprise teams.Explore our work
A phased modernization program spanning architecture, API redesign, and performance optimization for a regulated financial product.
Overview
A regulated financial product had outgrown its monolith: release trains measured in months, mobile ambitions blocked by APIs that were never designed for them, and performance complaints from enterprise accounts. We led a phased modernization—strangler migrations, new API boundaries, and observability—so the business could keep shipping while the foundation changed underneath.
Industry
FinTech
Duration
9 months (phased)
Engagement
Platform modernization
Team
Squad + their staff engineers
Compliance and uptime constraints meant big-bang rewrites were off the table. Every cutover needed rollback paths, parity checks, and sign-off from risk. Mobile required lean APIs and consistent auth, but the monolith mixed concerns that made safe extraction slow without a map.
What we delivered
We introduced a strangler pattern around the highest-change domains first—customer profile and reporting—while instrumenting latency and error budgets before touching money paths. New services spoke through an API gateway with versioned contracts; mobile consumed BFF endpoints shaped for screen flows.
Phased delivery with clear acceptance criteria at each step.
How we deliver
Each phase ended with measurable parity: same outputs, better latency, documented rollback. We kept a public architecture decision record so internal teams knew what was stable vs. in flux.
Tangible outputs the client team owned at handoff—not slide artifacts.
Target reference architecture and phased roadmap
API gateway with versioning and rate policies
Extracted services for profile and reporting domains
Mobile BFF and redesigned critical-path APIs
Observability stack with SLOs and on-call runbooks
Migration parity checklists and compliance evidence pack
Outcomes
Measured impact from the program—not projected estimates.
Faster page loads
P95 on core authenticated screens
Downtime migrations
Across three major cutovers
Mobile launch
From BFF kickoff to App Store submission
Release frequency
Teams on extracted services vs. monolith baseline
Technologies
What we'd do again
More proof
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