Case StudyBanking & Financial Services
Real-Time FinTech Dashboard for 3.2M Users
Migrated legacy SPA to Next.js 15 with real-time streaming, achieving <100ms latency globally and zero downtime over 18 months.
36ms
Global TTFB
99.99%
Uptime
72%
Latency Reduction
Real-Time FinTech Dashboard for 3.2M Users
This engagement focused on modernizing a high-traffic banking platform while meeting strict uptime and compliance requirements.
✅ Challenges
- Crashing React SPA during peak load
- Multiple hydration errors and 1.8s TTFB
- No real-time streaming capability
- Expansion into new global regions
🚀 What We Delivered
- Full migration to Next.js 15 + App Router
- Edge-first rendering with sub-50ms TTFB
- WebSockets for real-time transaction feed
- On-demand ISR for regulatory content
- SOC2-ready architecture + runbooks
📈 Verified Results
- 36ms average TTFB
- 99.99% uptime over 18 months
- 72% latency reduction
- Passed third-party audit
🔍 Key Takeaways
- Server Components + edge caching eliminate hydration overhead
- Incremental migration ensured zero downtime
- Observability (OTel + RUM) is non-negotiable at scale
Impact Analysis
36ms
Global TTFB
99.99%
Uptime
72%
Latency Reduction
3.2M
Users Served
"They turned our system into a banking-grade platform in 10 weeks. Best engineering partner we’ve worked with."
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