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Kiril Tsonev

@kiriltsonev

Frontend engineer with 5+ years building production-grade, data-heavy web apps with scalable architecture and measurable impact.

Bulgaria

Message

What I'm looking for

I’m looking for a frontend role where I can own scalable UI architecture for data-heavy products, optimize performance, and ship accessible, production-grade features—ideally in teams that value measurable impact and an AI-native development workflow.

I’m a Frontend Engineer with 5+ years delivering production-grade web applications across Web3, healthcare, fintech, and e-commerce. I specialize in data-heavy interfaces, complex state management, and scalable component architecture—always with a focus on performance optimization and accessible, production-ready UX.

In my current role, I architected a comprehensive CRM system with advanced data tables (dynamic columns, filtering, sorting, inline editing, pagination) and built analytics dashboards using Recharts. I also delivered a production-ready data room with hierarchical structure, version history, real-time analytics, and granular access control—then reinforced security with SSO and MFA.

I’ve led teams and shipped measurable outcomes, including full-featured airdrop programs (29,000+ unique wallets and $3M+ trading volume) and accessibility-focused work achieving WCAG 2.1 AA compliance in healthcare. I love building with an AI-native workflow and turning complex requirements into clean, maintainable frontend systems.

Experience

Work history, roles, and key accomplishments

Current

Frontend Engineer

Current

Orthrus

Jul 2025 - Present (11 months)

Architected a production CRM with dynamic data tables (filtering, sorting, inline editing, pagination) and built analytics dashboards using Recharts. Implemented a secure data room with SSO/MFA and permission-based access, and led a 3-person engineering team.

React TypeScript TanStack Table Recharts WebSockets React Query Zustand Role Based Access Control CSV XLSX Import Workflows MFA Next.js

Web3 Frontend Engineer

Bebop.xyz

May 2024 - Jul 2025 (1 year 2 months)

Delivered airdrop programs to 29,000+ unique wallets and $3M+ in trading volume, building time-gated/recurring token distribution features and tracking dashboards. Migrated state management from Pullstate to Zustand and APIs to React Query, and strengthened reliability with Playwright/Docker e2e tests and real-time price streaming via WebSockets.

React Zustand React Query Playwright Docker Viem Wagmi Next.js

Frontend Engineer

Company Bro

Oct 2023 - Apr 2024 (6 months)

Built a flight aggregator that facilitated 800+ ticket sales and generated $25,000+ in affiliate revenue in its first quarter using Duffel API and Stripe payments. Contributed to a website redesign focused on responsiveness and performance, and handled Docker and Azure CI/CD configuration with legacy browser fallbacks.

React Duffel API Integration Docker

Frontend Engineer

MentorMate

Jan 2023 - Oct 2023 (9 months)

Contributed to a US healthcare platform achieving WCAG 2.1 AA compliance, with a focus on accessibility, HIPAA-aligned user-centered design, and robust UI behavior. Built complex appointment forms and medical data visualizations, plus doctor search/filtering and personalized user dashboards.

React WCAG 2.1 AA Data Visualization Doctor Search & Filtering Production Accessibility

Frontend Engineer

Alorica

Nov 2020 - Dec 2022 (2 years 1 month)

Modernized multiple e-commerce storefronts by migrating from jQuery/vanilla JavaScript to React, improving maintainability and performance. Built new storefronts from scratch and delivered responsive UI across small-to-medium e-commerce products in collaboration with cross-functional teams.

React JQuery To React Modernization Responsive UI Cross Functional Collaboration Production