Андрій

ANDRII SYDORCHENKO
Senior Frontend Engineer

[open contact info](look above in the "contact info" section),
[open contact info](look above in the "contact info" section) (telegram, viber)
[open contact info](look above in the "contact info" section)
Kyiv, Ukraine — Open to Remote

PROFESSIONAL SUMMARY
Senior Frontend Engineer with 5+ years of experience building production-grade
React/TypeScript applications for fintech and marketplace platforms. Proven track record
of owning features end-to-end — from architecture decisions to delivery — within complex
monorepo environments. Deep expertise in modern build tooling (Vite, Turborepo),
scalable architecture patterns (Feature-Sliced Design, microfrontends), and payment
system integration. Experienced in mentoring developers and driving engineering quality
through code review culture and large-scale TypeScript migrations.

TECHNICAL SKILLS
● Languages: JavaScript (ES6+), TypeScript, HTML5, CSS3/SCSS
● Frontend: React, Next.js, React Query, Zustand, Redux, GraphQL
● Build & Tooling: Vite, Rolldown, Turborepo, pnpm Workspaces, Webpack, Biome
● UI & Styling: Tailwind CSS, shadcn/ui, Material UI, React Bootstrap
● Architecture: Feature-Sliced Design (FSD), Microfrontends, Monorepo, SOLID
● Testing: Jest, React Testing Library
● Backend: Node.js, Express.js
● Databases: PostgreSQL, MongoDB
● DevOps & Tools: GitHub Actions (CI/CD), Vercel, Jira, WebSockets, ESLint, Prettier
● Payments: Primer

WORK EXPERIENCE

Finik.Pro LLC — Senior Frontend Engineer
October 2021 – Present · Kyiv, Ukraine (Remote)
B2B digital banking platform enabling enterprise clients to manage accounts, payments,
and daily financial operations — used by corporate customers as their primary banking
interface.
● Served as the senior frontend engineer in a 3-person team (2 devs + Tech Lead),
owning end-to-end delivery of core product features — new functionality and
production bug fixes
● Led a full codebase migration to strict TypeScript, completed in ~1 month, eliminating
a major class of runtime type errors and significantly improving long-term
maintainability
● Designed and prototyped a microfrontend architecture for the legacy admin console —
produced a working proof-of-concept integrating legacy and new codebases, laying
the groundwork for future independent feature ownership

● Architected modular, security-conscious UI components: role-based access control
(RBAC), dynamic routing, and encrypted data handling for banking workflows
● Introduced a code review culture and mentored a junior developer on React and
TypeScript best practices
● Collaborated closely with backend engineers and QA throughout the delivery lifecycle
to ensure reliable, high-quality releases

Aventus IT (GGChest) — Senior Frontend Engineer · Contract
September 2025 – July 2026 · Remote
Gaming digital goods marketplace connecting buyers and sellers of game accounts,
in-game currencies, and related items — built within a pnpm/Turborepo monorepo
alongside a shared internal component library.
● Built login and registration authentication flows; integrated Primer headless payments,
delivering full control over the checkout experience from scratch
● Established the project's design system baseline: typography system and a
foundational library of reusable UI components (shadcn/ui + Tailwind CSS) used
across multiple apps in the monorepo
● Built a custom Vite 8 plugin using SVGR to automate SVG-to-React icon generation,
replacing a legacy CLI-based workflow; diagnosed and resolved underlying Rolldown
file-watcher bugs
● Worked within a pnpm/Turborepo monorepo using React, Next.js, TypeScript, Vite 8,
and Feature-Sliced Design (FSD) architecture

EDUCATION
● Dan.IT Education — Full Stack Developer (React, Node.js, Java) September 2019 –
February 2021
● Taras Shevchenko National University of Kyiv — Master of Engineering, High
Technologies 2014 – 2016
● Taras Shevchenko National University of Kyiv — Bachelor of Engineering,
Radiophysics 2010 – 2014

LANGUAGES
🇺🇦
🇬🇧
● Ukrainian — Native
● English — Upper-Intermediate (B2+), confident in async communication and
technical discussions