Vodostaj.rs: React SPA → Next.js, 1.55M impressions
How a React SPA — now migrated to Next.js — reached 1.55M impressions, 35K clicks and #1 Google rankings in 90 days, with 25K users across Serbia, Bosnia, Germany and beyond. SEO-first from day one, compounding ever since.
The numbers, straight from Google.
Search Console and Analytics for the last 90 days — after the Next.js migration, organic search compounded into all-time highs.
9 in 10 sessions happen on a phone — engineered mobile-first for anglers checking levels on the riverbank.
A brand-new channel — visitors now arrive from AI assistants like ChatGPT, a discovery source that barely existed a year ago.
Source: Google Search Console + Google Analytics 4 · vodostaj.rs · Mar 19 – Jun 19, 2026.
Fragmented data, urgent need
- No centralized platform for river water level data in Serbia
- Data scattered across multiple government sources
- No real-time monitoring solution for public access
- Need for fast development (flood season approaching)
- Limited budget for traditional development approach
Modern platform, rapid execution
- Built React SPA application with real-time data integration
- Integrated 100+ monitoring stations from government APIs
- Implemented interactive map visualization
- Created SEO-first architecture with manual Google indexing
- Deployed scalable infrastructure on modern hosting
Measurable outcomes
Real users, real engagement
Beyond traffic metrics, the platform drives meaningful user engagement with PWA installs, daily tracking, and active community.
Real SEO results from React SPA
Pure React SPA with manual Google indexing. No SSR, no prerendering. Just solid SEO strategy and content.
Top Ranking Keywords
From React SPA to Next.js 2.0
Strategic technology evolution based on proven results, not assumptions.
React SPA Foundation
Fast time to market with proven SEO results. Manual indexing validated the strategy and reached #1 rankings.
- 8-week launch
- #1 rankings achieved
- PWA installs
- 200+ favorite stations
Next.js Migration
Migrated to Next.js for automatic indexing, SSR/SSG and stronger Core Web Vitals — now at 1.55M impressions and 35K clicks per quarter.
- Automatic Google indexing
- Improved Core Web Vitals
- SSR for real-time data
- 1.55M impressions / quarter
Tech stack and architecture
Platform
- • Next.js
- • React 18
- • TypeScript
- • Tailwind CSS
PWA & Engagement
- • Progressive Web App
- • Push notifications
- • Offline support
- • Home screen install
Analytics & Tracking
- • Google Analytics 4
- • Data Layer events
- • User behavior tracking
- • Conversion funnels
SEO Strategy
- • SSR/SSG auto-indexing
- • Semantic HTML
- • Meta optimization
- • Structured data
8 weeks from concept to launch
Research & Architecture
- • API research and data source identification
- • Information architecture planning
- • SEO-first URL structure design
- • Tech stack finalization
- • Design system creation
Core Development
- • API integration and data processing
- • Map implementation and station markers
- • Real-time data updates
- • Station detail pages
- • Search and filtering
Polish & Optimization
- • Performance optimization
- • Mobile responsiveness
- • SEO metadata implementation
- • Analytics integration
- • Error handling and edge cases
Launch & Monitoring
- • Final testing and QA
- • Production deployment
- • Performance monitoring setup
- • Initial user feedback collection
- • Documentation
Key learnings from this project
SEO Wins on Strategy, Not Just Stack
A pure React SPA hit #1 rankings through manual indexing — proof that SEO is strategy and content first. The later Next.js migration then unlocked scale: 1.55M impressions in 90 days.
PWA Drives Real Engagement
96 users installed the PWA and enabled push notifications, with 200+ stations added to favorites. This level of engagement validates the product-market fit and user need.
Data Layer = Better Decisions
Comprehensive data layer tracking through GA4 captures every user interaction. This granular data enables evidence-based optimization and feature prioritization.
Evolution Over Perfection
Shipped v1.0 as React SPA to validate market fit. With 1.8K active users proven, Next.js 2.0 migration is now justified by real demand, not assumptions.
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