Оксана

OKSANA SUMMARY
POKHVALENKO Full-stack JavaScript/TypeScript developer specializing in
React/Next.js (frontend) and Node.js/Fastify (backend). Experienced
FULLSTACK DEVELOPER in building production-ready UIs, modular APIs, and integrating
analytics/observability (OpenTelemetry, Sentry). AdTech expertise:
Prebid.js, Google Ad Manager, custom bid adapters, and ClickHouse
analytics. Previously delivered 300+ custom furniture projects, honing
CONTACT
attention to detail and problem-solving skills.

[open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)
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EXPERIENCE
LinkedIn
GitHub Frontend Developer
February 2023 – Present
Ukraine, Kyiv / Open to remote Self Employed
Delivered 8+ SPA/SSR apps with React/Next.js and TypeScript.
Built adaptive UI components (Sass/BEM/Tailwind) with cross-
browser support.
SKILLS
Implemented routing and state (React Router, Redux Toolkit/Zustand)
with client caching (TanStack Query).
Languages: TypeScript, JavaScript (ES2015+), SQL
Integrated REST APIs (fetch/axios); optimized rendering, caching, and
Frontend: React, Next.js, Vue, Angular, HTML5, lazy loading.
CSS3, Sass/SCSS, BEM, SSR, Shadow DOM, Tailwind, Set up build & deploy (Vite/Webpack, Vercel) and CI/CD (GitHub
Actions, Husky).
Material UI
Worked with MongoDB/PostgreSQL via Prisma/Sequelize.
State & Forms: Redux Toolkit, Zustand, TanStack
React Query, React Hook Form, Zod
Backend & APIs: Node.js, Fastify, Express, REST,
Frontend Developer
Team Project August - September 2025
Swagger/OpenAPI, Pino
Heartland Homes
Databases: MongoDB/Atlas, Prisma, PostgreSQL, Product: React 19 + Vite SPA for rental search, filters, property details,
Sequelize, ClickHouse (OLAP) and booking.
Auth: JWT-based UI with protected routes and role-aware navigation.
Auth & Security: JWT (HttpOnly cookies), Argon2,
Payments: Stripe Checkout integrated into the booking flow.
DOMPurify Maps: Leaflet for property location and discovery.
Parsing/Scraping: RSS Parser, Cheerio, JSDOM Data & Deploy: Redux Toolkit, Axios (env-based API, interceptors),
SCSS Modules; deployed on Vercel.
Observability & Analytics: OpenTelemetry
Demo GitHub Code
(traces/metrics/logs), Sentry, Prometheus (prom-
client), Recharts Fullstack Developer September - October 2025
DevOps & Tooling: Git/GitHub, GitHub Actions, Internship Program Bidmatic
Built AdTell: an end-to-end news + AdTech platform with Prebid.js
Husky + lint-staged, Docker & Docker Compose, Vite,
header bidding and a custom Fastify AdServer.
Webpack, Babel, NPM, VS Code, Biome, ESLint, Delivered the full auction flow: bidRequested → bidResponse →
Prettier, Vercel (FE), Render/Railway (BE) auctionEnd → renderAd.
AdTech (Domain): Prebid.js (header bidding), Google Implemented AdServer features: line items, filters (status/date, geo,
size, floor-CPM), frequency capping, creative delivery.
Ad Manager (GPT), custom bid adapters, content
Analytics: ClickHouse (OLAP), OpenTelemetry (traces/metrics/logs),
monetization, ClickHouse analytics, frequency Prometheus metrics, Sentry.
capping, geo/size/floor filters Security: JWT (HttpOnly cookies), Shadow DOM ad-creation form
isolation, DOMPurify.
Testing: Vitest, Playwright, Testing Library, @testing-
Containerization & deploy: Docker Compose; FE on Vercel, BE on
library/jest-dom Render; API docs with Swagger/OpenAPI.
English — Intermediate, Czech — Intermediate Сertificate
 OKSANA
POKHVALENKO
FULLSTACK DEVELOPER

PORTFOLIO
EDUCATION AdTell – is a news web app with a built-in advertising platform—
React + TypeScript (Vercel) on the frontend and Fastify/Node.js
(Render) on the backend—featuring Prebid.js header bidding with
Kherson Agrarian University
a custom AdServer, MongoDB Atlas, ClickHouse analytics,
Master’s Degree in Zoo Engineering OpenTelemetry/Swagger, and a Shadow DOM ad-creation form.
Demo GitHub Code GitHub Code
Task Manager – A full-featured task management application with
CRUD operations, filtering, sorting, and searching capabilities, built
COURSES using React and a Node.js (Express.js) backend with MongoDB.
Demo GitHub Code
Frontend course at Mate academy (Сertificate)
GadgetHub – A responsive online store with favorites, a cart,
FreeCodeCamp (HTML, CSS, JavaScript)
search, and a product slider, built using React and a simple Node.js
Reactjs.org
backend.
Udemy: Learn to Program in Javascript: Beginner Demo GitHub Code
to Pro. Javascript Essentials. Responsive Web &
Mobile Development in HTML, CSS & Javascript. My Recipe App — a full-stack mobile application built with React
Native (Expo) and a Node.js/Express + MongoDB API, enabling
users to browse recipe lists and details, add/edit/delete entries,
search by title, and display images from external URLs.
Demo GitHub Code

My Todo List App — a Next.js 14 (React) task manager with
MongoDB Atlas (Mongoose) persistence, featuring
add/edit/complete/delete, filters, and drag-and-drop reordering,
with a responsive UI and deployment on Vercel.
Demo GitHub Code

Vue PostPulse — a Vue 3 (Composition API) SPA built with Vite,
Vue Router, and Vuex, using Axios to the Mate Academy API for
full CRUD on posts with basic comment management, simulated
auth via localStorage, and a responsive Bulma UI with fast client-
side routing.
Demo GitHub Code

TaskTrek — a modern Angular (v19) todo app featuring Standalone
Components, Reactive Forms, RxJS (BehaviorSubject) state,
router-driven filtering, and REST persistence via HttpClient, with a
responsive SCSS UI and code quality enforced by ESLint/Prettier.
Demo GitHub Code