Co-leading backend team building Cetus Central — a utility management platform for Distribution System Operators across Europe.

• Architected GraphQL APIs (Node.js, Express, Apollo Server, Drizzle ORM, PostgreSQL) for power quality monitoring, metering, billing, and outage management
• Designed a five-role RBAC system with granular permission controls across organizations
• Built a flexible billing engine supporting per-transformer, per-meter, and flat monthly models with automated invoice generation
• Implemented Azure DevOps CI/CD pipelines, reducing deployment time by 40%
• Coordinated cross-timezone delivery with frontend teams in Italy and India

Analyzed mental health patient datasets to build predictive models and interactive dashboards.

• Cleaned and preprocessed large mental health patient datasets for analysis and ML model training
• Built interactive Power BI dashboards that reduced reporting effort by 60%
• Developed ML models (Scikit-Learn) to predict treatment outcomes with 85%+ accuracy

Built and deployed production applications across credit operations.

• Developed full stack applications (React, Vue, Node.js, Django REST Framework) used across credit operations
• Built the Valuer Auto Allocation System, automating collateral valuation workflows
• Administered production databases: Oracle 19C, PostgreSQL, SQL Server, MySQL

Shipped a production tax calculator as a Next.js + Express monorepo with a shared @ziler/tax-engine TypeScript package handling URA PAYE, NSSF, and LST computations. Self-deployed on Hetzner VPS with Nginx, PM2, Let's Encrypt SSL, and Cloudflare email routing.

• Shared @ziler/tax-engine TypeScript package for URA PAYE, NSSF, LST
• SEO-optimized pages with shareable calculation URLs
• Downloadable PDF payslips
• Self-hosted with Nginx + PM2 + Let's Encrypt

Configured and maintain a Hetzner VPS as a multi-service production platform running Docker Compose (PostgreSQL 16, Redis 7), Nginx with SSL termination, sslh for port multiplexing, and automated cron-based backup rotation.

• Docker Compose orchestration (PostgreSQL 16, Redis 7)
• Nginx reverse proxy with Let's Encrypt SSL
• sslh port multiplexing — SSH + HTTPS on port 443
• Automated cron-based backup rotation
• WireGuard VPN for secure remote access

Built a real-time business management platform using Vue 3, Quasar, TypeScript, and Supabase. Features live transaction tracking with PostgreSQL real-time subscriptions, Row Level Security, and comprehensive payment analytics.

• Real-time transaction tracking with PostgreSQL subscriptions
• Row Level Security for multi-tenant data isolation
• Worker management with payment tracking
• Expense analysis and reporting dashboard

Built a React Native mobile app with Django REST backend for real-time school shuttle routing. Uses Random Forest ML models for delay prediction with traffic and weather-based dynamic rerouting.

• ML-powered delay prediction using Random Forest
• Real-time rerouting based on traffic, crashes, and weather
• Google Maps API integration for live navigation