Олександр

OLEKSANDR KONOVALENKO
FULLSTACK DEVELOPER
CONTACTS
[відкрити контакти](див. вище в блоці «контактна інформація») (Telegram: @icdxxx)
[відкрити контакти](див. вище в блоці «контактна інформація») LinkedIn GitHub
Odesa, Ukraine | remote / office / relocate

SUMMARY
Fullstack Developer with experience in React, TypeScript, Node.js and PostgreSQL. In a team of 4 developers,
delivered the catalog, search, checkout, JWT authentication and an AI shopping assistant (Express and Groq
API) for an Apple devices store in 2 weeks, with about 20 merged pull requests. Uses Claude Code in the daily
development workflow. Background in consumer electronics retail, ranked #2 in sales among 20 consultants.

SKILLS
JavaScript (ES6+), TypeScript, HTML5, CSS3, SQL, C++ (Arduino)
React (Hooks, Router, Context API), Redux Toolkit, SCSS, Tailwind CSS, BEM, Responsive Design
Node.js, Express, REST API, JWT Authentication, PostgreSQL
Git, GitHub, GitHub Actions, Vite, ESLint, Prettier, Husky, Figma, Render
Claude Code, LLM API integration (Groq), prompt injection protection
Jira, Knowledge of SDLC, Waterfall, Agile concepts (Scrum, Kanban)
Languages: English (Intermediate, B1), Ukrainian (Fluent)

WORK EXPERIENCE
Fullstack Developer, Project-based Jul 2026 – Present
Built several web applications with React, TypeScript, Node.js and SCSS, from a Figma layout or task spec to
a deployed demo on GitHub Pages and Render
Built an Express REST endpoint for an AI chat and connected the frontend to a Node.js/PostgreSQL API with
JWT authentication
Worked in Scrum with Jira: a branch and pull request per task, code review before every merge, about 20
merged PRs in 2 weeks
Reviewed teammates' pull requests and caught a security flaw where the login response exposed the
password hash
Kept the codebase consistent with ESLint, Prettier and Husky pre-commit hooks

PORTFOLIO
Nice Gadgets, E-commerce Store (team project, 4 developers)
Tech stack: React 19, TypeScript, Tailwind CSS, Node.js, Express, PostgreSQL, JWT, Groq API
Built an AI shopping assistant, an Express /api/chat endpoint calling the Groq API, prompted with the full
catalog so it suggests only in-stock products with real prices and shows them as clickable cards
Protected the chat from prompt injection with input checks, a request timeout and clear errors for API
outages and rate limits
Implemented the catalog with sorting, pagination and filters by price, memory, RAM and year, all synced to
URL query params
Created an accessible header search (ARIA combobox, keyboard navigation) that groups color and memory
variants of one model
Developed sign up and login with JWT, a password strength indicator, and checkout with validation and 3
delivery options
Fixed a price mismatch for 48 products caused by two data sources and added EN/UK localization with a
typed i18n context
GitHub Live Demo
Todo App with API
Tech stack: React, TypeScript, REST API, SCSS, Bulma
Implemented full CRUD synced with a REST API: add, rename, delete and toggle todos, including toggle all
Added a loader on each todo while its request is in progress and error notifications when a request fails
Built All / Active / Completed filters and inline editing (Enter to save, Esc to cancel, empty title deletes)
GitHub Live Demo

Bang & Olufsen Landing Page
Tech stack: HTML5, SCSS, BEM, Flexbox, CSS Grid, Vite
Built a landing page from a Figma design, responsive across mobile, tablet and desktop
Created a burger menu in pure CSS without JavaScript and smooth scrolling between page sections
Optimized images with WebP and lazy loading and organized styles into SCSS partials with BEM naming
GitHub Live Demo

PREVIOUS WORK EXPERIENCE
Sales Consultant, Comfy, Odesa Jul 2024 – Feb 2026
Ranked #2 in sales among 20 consultants by matching customers with smartphones, laptops and home
appliances that fit their needs
Ranked #1 in the store for sales of additional services
Consistently met monthly sales targets
Ran inventory counts and followed new tech releases to keep product knowledge current

EDUCATION
Bachelor's Degree in Automation and Computer-Integrated Technologies
Odesa National University of Technology | Aug 2025 – Present
Junior Bachelor's Degree in Automation and Computer-Integrated Technologies
Professional College of Industrial Automation and Information Technologies, Odesa National University of
Technology | Sep 2021 – May 2025

COURSES
Fullstack Developer Course, Mate academy – certificate
HTML/CSS, JavaScript, Git, React, TypeScript, React with TypeScript, Node.js, SQL, How the Web Works, GenAI
Essentials