FRONTEND ENGINEER • DESIGN SYSTEMS • MOTION • PERFORMANCE
I’m Vadym - a frontend engineer. I rebuilt a live DTC storefront solo into a headless Next.js commerce platform: custom Stripe checkout and self-service subscriptions. I go into the backend when a feature needs it.
A small selection of recent projects.
Lucetic - Headless Commerce Storefront
Live DTC supplement brand (lucetic.com). Solo rebuild of 30+ production routes on Next.js 16 / React 19, pixel-accurate from 100+ Figma frames, with SSR and micro-animations. Multi-step Stripe checkout with Apple Pay / Google Pay and self-serve subscriptions.
Internal Dashboard for Game Updates
Developed an internal dashboard used by multiple teams (about 40 developers) to track game updates and manage file signatures at scale. Includes RVA search, signature CRUD with scan options and history, and a webhook system (event filters, headers, toggles) with on-demand sync.
Live site is private.
Finance dashboard
Personal finance dashboard with Plaid sandbox linking, account/transaction sync, analytics charts, filters, CSV import/export, auto-categorization, and subscription-ready flows via Lemon Squeezy.
Real-time Messenger with Workspace control
Slack-style workspace messenger with real-time channels, threads/replies, reactions, optimistic UI, invite flows, image uploads, and role-based workspace controls.
AI Platform
Multi-model AI playground with provider abstraction, reusable chat/composer primitives, streaming responses, abort/retry controls, and typed service contracts for maintainable feature expansion.
Freez Blood
Web-application for community project of game servers on CS:GO / CS2 with 1000+ concurrent users. The application has live chat, trades, trading platform, clans and much more. The project was fully developed from scratch, taking into account all customer requirements and Figma design.
Real-time video / audio Messenger
Discord-style real-time video and audio messenger with features like voice chat, video chat, file sharing, channel creation, server management, customizable servers/channels, and role-based user management.
Production Project
Although the project has no business value, but everything is done to the highest standards: testing, architecture, module interaction, future extensibility. Anyway, you can log in to your account, change the design of the application, application themes, view pre-prepared articles, and a few other features.
My work experience.
Jan 2026 – Present
Jan 2026 – Present
Product Engineer
Independent
Python real-time trading runtime / execution framework
- Built a Python real-time trading runtime with FastAPI control plane, REST/WS integrations, health monitoring, emergency pause states, and snapshot/recovery flows.
- Designed a modular execution engine with separated inventory model, policy-based routing, exit policies, and self-healing order management.
- Optimized order routing and reconciliation logic, reducing observed order rejections from ~10k to ~6k and increasing fills from ~30k to ~45k in comparable 24h windows.
- Performed exchange network-path analysis and region-aware infrastructure placement, reducing request round-trip latency from ~500–750ms to ~8–20ms; improved Linux async I/O throughput by ~25% with uvloop.
Jun 2026 – Aug 2026
Jun 2026 – Aug 2026
Frontend Engineer (Headless Commerce)
Lucetic (Contract)
DTC supplement brand (lucetic.com)
- Rebuilt 30+ production routes across catalog, account, and checkout on Next.js 16 / React 19, working from 100+ Figma frames, with SSR and responsive layouts throughout.
- Owned SEO end to end: structured data, generated sitemaps, OG metadata, and legacy URL redirects preserved through the platform change.
- Built a custom multi-step Stripe checkout with saved payment methods, 3DS, Apple Pay / Google Pay, and off-session tokenization for renewals.
- Shipped subscription self-service (pause, resume, reschedule, quantity changes, cancellation) alongside accounts, photo reviews, and returns/RMA, backed by custom WooCommerce REST endpoints and transactional email workflows.
- Ran the production migration across Cloudflare, WP Engine, Vercel, and Stripe with commerce-data reconciliation and no interruption to live subscription renewals.
Oct 2025 – Jan 2026
Oct 2025 – Jan 2026
Frontend Engineer (Platform / UI Infrastructure)
Eleken
Internal platform + AI Proposal Builder (MVP)
- Co-defined frontend architecture with the tech lead; standardized module boundaries and reusable UI primitives.
- Built a Sheet/Modal system, scalable Form Kit, typed TanStack Query data layer, and reusable platform patterns.
- Shipped complex interactive UI: calendar views with collision logic and reusable Kanban DnD workflows.
- Built a TipTap-based Notion-like editor with AI-assisted targeted updates for document workflows.
- Improved performance via route/feature-level code splitting and dynamic imports, cutting initial load by ~40%.
My hard skills.
Frontend Core
- TypeScript
- JavaScript
- React
- Next.js
- HTML
UI & Interaction
- Tailwind CSS
- SASS / SCSS
- styled-components
- shadcn-ui
- Framer Motion
- Storybook
State
- Zustand
- Redux Toolkit
- Redux
Data, Forms & Payments
- TanStack Query
- REST
- GraphQL
- WebSockets
- React Hook Form
- Zod
- Stripe
Testing & Tooling
- Jest
- React Testing Library
- Cypress
- Vite
- Webpack
- ESLint
- Git
- Figma
Backend, when needed
- Node.js
- NestJS
- Python / FastAPI