Krasimir Kostadinov
Development Team Lead at Mozarto
Sofia, Sofia-City, Bulgaria
Summary
👤
Senior🎓
Top SchoolKrasimir Kostadinov is a Development Team Lead and senior frontend engineer with 10+ years building high-performance, scalable web applications across gaming, fintech, and enterprise domains. He specializes in React, TypeScript, Redux and modern build tooling, and has a proven track record of performance tuning (e.g., 35% bundle reduction, 60% faster loads) and shipping PCI DSS / ISO 27001-aligned features in regulated payment products. Krasimir has led cross-team integrations and team mergers, mentored junior-to-mid engineers, and created shared UI systems (Storybook) and modular microservice widgets that improved consistency and conversion rates. He brings backend and cloud experience from migrating services to Go and GCP, hands-on security work (CSP, iframe isolation, OAuth/JWT), and a practical interest in AI/ML integrations — including OCR and multi-agent experiments — that he’s exploring to enrich frontend user experiences. Based in Sofia, he combines pragmatic engineering with operational discipline to deliver measurable business outcomes.
10 years of coding experience
13 years of employment as a software developer
High School "Ivan Vazov" Stara ZagoraMaster’s Degree, Computer Software Engineering, Master’s Degree, Computer Software Engineering at Technical University of Varna
English, Bulgarian
Github Skills (12)
react-hooks9
validation9
react-native-web8
form-builder8
forms8
yup7
react-native7
validations7
react7
typescript7
state-management6
dx6
Programming languages (2)
Github contributions (5)
krasimirkostadinov/XML-Parser
Jul 2015 - Aug 2015
Contributions:14 commits, 13 pushes, 3 branches in 29 days
krasimirkostadinov/QuoteQuiz
Aug 2015 - Aug 2015
Contributions:11 commits, 9 pushes, 1 branch in 3 days
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