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@karltann
Senior Full Stack Engineer specializing in PHP/Symfony and cloud-native systems.
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.
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Work history, roles, and key accomplishments
Engineered Symfony-based APIs supporting 2M+ users with 99.9% uptime, integrated AI courier prediction improving delivery efficiency by 15%, and reduced deployment errors by 40% through CI/CD automation.
Rimi Eesti
Oct 2016 - Apr 2020 (3 years 6 months)
Developed Symfony backends handling 500k+ daily transactions and Angular dashboards, improving reporting accuracy 30% and reducing deployment times by 50% via CI/CD automation.
Degrees, certifications, and relevant coursework
Bachelor of Computer Science, Computer Science
2007 - 2010
Grade: 3.7/4.0
Completed a Bachelor of Computer Science with a focus on software development and web technologies, graduating in July 2010.
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