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Full-Stack Developer with production experience across React web front ends, Express.js/Firebase back ends, and React Native mobile apps. I’m comfortable building REST APIs, integrating Firebase services (Auth, Firestore/Realtime Database, Cloud Functions, Push), and delivering responsive component-based UIs.…

Tsveti Nikolova

Full Stack Developer, Web Developer, Front-End Developer, +1

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Full-Stack Developer with production experience across React web front ends, Express.js/Firebase back ends, and React Native mobile apps. I’m comfortable building REST APIs, integrating Firebase services (Auth, Firestore/Realtime Database, Cloud Functions, Push), and delivering responsive component-based UIs.…

Available to hire

Full-Stack Developer with production experience across React web front ends, Express.js/Firebase back ends, and React Native mobile apps. I’m comfortable building REST APIs, integrating Firebase services (Auth, Firestore/Realtime Database, Cloud Functions, Push), and delivering responsive component-based UIs.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Bulgarian

Fluent

English

Advanced

German

Beginner

Italian

Beginner

Work Experience

Software Developer at Diadraw LTD

September 1, 2025 - Present

Built and maintained production React web applications using responsive, component-based architectures. Designed Express.js REST API servers integrated with Firebase for authentication, data storage, and business logic. Owned React Native development from Oct 2025: fixed front-end bugs, then architected and built new apps end-to-end. Resolved native-level build failures in Swift (iOS) and Kotlin (Android), including Android 16 KB page alignment and complex Xcode/Gradle configuration issues. Led React Native upgrades across major version releases, handling breaking changes and native module incompatibilities. Integrated mobile and web apps with Firebase Cloud Functions, Realtime Database, Auth, and push notifications.

Software Developer Intern at PetroffSoft

July 1, 2022 - May 1, 2024

Developed web applications using C# and .NET with object-oriented design principles. Built Windows Forms desktop applications and gained exposure to the full software development lifecycle. Returned for three separate internship cycles over two years, demonstrating consistent performance and rapid skill growth.