System StatusOnline
NAV
Mayko
Reports
Business Intelligence System / Lead Architect / Full-Stack Engineer
React 19SupabaseOpenAI GPT-4oRechartsGoogle APIs
8+
Data Sources
100%
Real-time Profitability
<2s
Report Gen Time
> SYSTEM_OVERVIEW
Mayko Reports is an internal Single Page Application (SPA) serving as the operational heart of a performance marketing agency. It solves the problem of data fragmentation by aggregating SEO, Google Ads, and time-tracking data into a single source of truth. The system offers real-time profitability analysis (ROS), automated client reporting, and AI-driven insights, replacing dozens of disconnected spreadsheets.
> APP_SCREENSHOTS
AI LLM Traffic Report
Multi-Channel Reports
Dashboard Preview
Profitability Engine (ROS)
Core Architectures
Multi-Channel Aggregation
Normalizes data from disparate ecosystems: SEO (GSC, GA4), Performance (Ads, TikTok, Meta), and Work Logs (Teamwork API). It creates a unified view of agency health.
Profitability Engine
The core financial module. It calculates 'Burn Rate' and Margin in real-time, factoring in dynamic employee hourly rates, fixed costs (links), and media spend.
AI Analysis (GPT-4o)
Automated intelligence that cleans raw work logs for client reports, detects 'Content Decay' in SEO data, and writes narrative summaries of monthly performance.
Security & RBAC
Enterprise-grade security. Row Level Security (RLS) ensures users only see their projects. Role-based access (Admin, Specialist, Client) is mapped automatically via API.
/// ENGINEERING_CHALLENGES_LOG
ERR_01
Token Rotation & Session Continuity
Google OAuth tokens expire every hour. Implemented a 'Silent Refresh' strategy using Supabase and serverless functions to maintain uninterrupted sessions without forcing user re-login.
ERR_02
Performance at Scale
Fetching history for 50+ projects caused bottlenecks. Solved via JSONB Caching in Supabase and 'Optimistic UI' updates, giving users instant feedback while data syncs in the background.
ERR_03
Client-Side Security
To protect API keys in a client-side Vite app, all sensitive operations (token exchange, payment logic) were moved to serverless edge functions, protected by strict RLS policies.
Services behind the build
The engineering capabilities applied in this case study are available as standalone services.
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WARSAW, PL
pawel.wiszniewski95@gmail.com