Karl Tann

I am a Senior Full Stack Engineer with over 10 years of experience designing and delivering scalable, secure, high-performance web applications across retail, logistics, and food delivery domains. I specialize in PHP/Symfony, with selective exposure to Laravel, and I integrate React and Angular front-ends to deliver end-to-end solutions.

I've engineered high-traffic Symfony APIs that supported millions of users with 99.9% uptime, integrated AI-driven features to improve operational efficiency, and optimized systems with caching, query tuning, and monitoring to measurably reduce response times and deployment errors. I automate CI/CD pipelines, deploy containerized services on AWS/GCP, and apply TDD, SOLID, and clean architecture practices.

I mentor engineers, drive adoption of best practices, and collaborate cross-functionally to deliver business impact—improving delivery efficiency, reducing inventory waste, and increasing operational visibility through dashboards and integrations. I seek to build reliable, observable platforms that scale and deliver measurable outcomes.