Aleksandar V.

I've spent the last decade building and scaling backend systems — mostly PHP/MySQL, but also Node.js, Go, and Python when the job calls for it. Most recently I spent 6 years as Lead Developer at Timewise — an appointment booking and POS platform for salons, gyms, studios, and other service businesses. I was responsible for backend architecture, API development, AWS infrastructure, and DevOps. I built and maintained the core systems that power scheduling, payments, staff management, and reporting. Outside of that, I've built everything from real-time trading systems with WebSocket feeds and live order execution, to full-stack SaaS apps, booking platforms, merchant dashboards, and analytics APIs. What I bring to the table: - Performance diagnosis and optimization — I work by collecting metrics across the request path, isolating the slow part, fixing it, and repeating until it's fast - Database expertise — query optimization, indexing strategies, connection management, schema design (MySQL primarily) - AWS infrastructure — EC2, RDS, load balancers, autoscaling, monitoring, cost management - DevOps — Docker, Kubernetes, CI/CD pipelines, automated deployments - API development — REST and GraphQL, built to handle load - Full-stack when needed — React, TypeScript, modern frontend tooling I communicate clearly and get to the point. I'm used to owning systems end-to-end — I don't need hand-holding to get things done. Tech: PHP, MySQL, Node.js, TypeScript, Go, Python, AWS, Docker, Kubernetes, Redis, GraphQL