Anhelina Mahidava
@anhelinamahidava
Senior Front-End Developer specializing in high-performance React apps for FinTech and AdTech, delivering measurable impact.
PolandWhat I'm looking for
I’m a Senior Front-End Developer with 7+ years of React expertise, specializing in building high-performance, scalable web applications for FinTech and AdTech. I’ve consistently delivered measurable outcomes—cutting page load times by 50%, improving build efficiency by 60%, and maintaining 99.5% uptime through proactive monitoring and performance-focused engineering.
In my most recent work, I expanded from front-end into full-stack ownership—driving end-to-end feature delivery across frontend and backend and contributing to a high-performance ad delivery platform. Earlier, I owned ~90% of a React codebase, built 300+ reusable UI components, optimized bundles with code-splitting and lazy loading, and improved onboarding speed (2x faster) while supporting 15+ A/B tests that increased conversion by ~12%.
Experience
Work history, roles, and key accomplishments
Full Stack Engineer
Adhese
Mar 2025 - Present (1 year 2 months)
Contributed to a high-performance ad delivery platform across Europe using Java, React, Tailwind CSS, NestJS, and GraphQL. Expanded scope to full-stack delivery within 3 months and helped coordinate a 6-person sprint process, improving sprint velocity by ~15%.
Front-End Engineer
Adhese
Jan 2025 - Mar 2025 (2 months)
Adapted quickly to GraphQL and NestJS and delivered first production PR within 3 days, shipping 5 features in the first month. Built and maintained responsive, accessible UI for an enterprise ad delivery platform and integrated advanced targeting features with backend and product teams.
Senior Front-End Developer
Synder - YC21
Jan 2018 - Dec 2024 (6 years 11 months)
Owned ~90% of the front-end codebase for a FinTech SaaS product, building 300+ React components and scalable UI architecture. Improved initial page load time by ~50% (4–5s to 2–2.5s), reduced build time by ~60% (8 min to 3 min), and maintained 99.5% frontend uptime using Sentry and proactive error handling.
Technical Front-End Teacher
IT-Academy Belhard
Sep 2019 - Apr 2020 (7 months)
Designed a front-end curriculum covering modern JavaScript, React, and HTML5, and guided students through hands-on projects and real-world development scenarios.
Education
Degrees, certifications, and relevant coursework
Belarusian State University of Informatics and Radioelectronics (BSUIR)
Bachelor of Science, Automated Information Processing Systems
Earned a B.S. in Automated Information Processing Systems from BSUIR in Minsk.
IT-Academy Belhard
Professional Level, Modern Front-End (JavaScript, HTML5)
Completed a professional-level Modern Front-End program focused on JavaScript and HTML5.
Tech stack
Software and tools used professionally
Availability
Location
PolandAuthorized to work in
Job categories
Skills
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