Данило

Danylo Ispanyuk
[открыть контакты](см. выше в блоке «контактная информация») | [открыть контакты](см. выше в блоке «контактная информация») | Telegram: @Ispanyuk | LinkedIn: Danylo Ispaniuk

SUMMARY

Full Stack JavaScript Developer with around 5 years of commercial experience building scalable
web applications using React, Next.js, TypeScript, Node.js, and PostgreSQL. Alongside commercial
development, I've been building AI-powered applications using LLMs, RAG architecture, vector
embeddings, and Supabase. I enjoy taking ownership of features from architecture to deployment
and building products that solve real user problems.

TECHNICAL SKILLS

Programming Languages

● Proficient: JavaScript, TypeScript

Libraries, Platforms & Technologies

● Frontend: React (Context API, Styled-Components, React Lazy, React Router, React Testing
Library), Next.js, Preact, PWA, HTML, SASS/SCSS
● Backend: Node.js, NestJS, Prisma, Supabase, NextAuth, Firebase, AWS S3,
● AI: OpenAI, RAG, Embeddings, Vector Search, AI SDK, Claude Code, Cursor
● State Management: Redux Toolkit, React Query, Zustand
● Testing: Jest, React Testing Library
● Build Tools: Webpack, Gulp, Vite
● UI Frameworks: Ant Design, Material-UI, Shadcn
● CI/CD & Containerization: Docker, Github Actions
● API & Data Fetching: RESTful API, GraphQL

Databases

● MongoDB
● PostgreSQL

Development Environments

● VS Code
● Git
 PROFESSIONAL EXPERIENCE

SevenPro

Sep 2025 – Present
Position: Frontend Developer
Team size: 10

Online Booking Platform
Position: Frontend Developer
Description: A large-scale, high-traffic online booking platform that lets users search, compare, and
reserve hotels, flights, and travel experiences in real time. Serving thousands of concurrent users, the
system aggregates availability and pricing from multiple providers, handles secure payments, and
manages the full booking flow from search to confirmation.

Responsibilities:

- Optimized application performance by profiling the app to find bottlenecks and improving data
fetching and caching, which reduced unnecessary network requests and re-renders.
- Developed new features and actively participated in improving existing functionality in a complex,
high-load production environment.
- Led the migration from Webpack to Vite, which significantly reduced bundle size, improved build
times, and enhanced overall application performance.
- Wrote clear documentation for each delivered feature, making it easier for other team members to
understand and maintain the functionality.
- Wrote unit and integration tests for new and existing functionality, increasing code reliability and
coverage.
- Investigated and resolved unexpected production issues affecting user-facing flows, improving overall
stability.
- Proposed and implemented UI and logic improvements based on production behaviour and user
feedback.
- Collaborated closely with cross-functional teams (backend, QA, product) to deliver stable and
high-quality features.
- Took part in technical discussions, code reviews, and decision-making for frontend-related
improvements.
- Worked closely with Product Managers to define technical solutions for new features

Technologies: React, Next.js, TypeScript, JavaScript, React Query, Vite, Webpack, Jest, React Testing
Library

COAX

Apr 2023 – Sep 2025

Transportation Management Platform
Position: Lead Frontend Developer
Team size: 7
Description: The project focuses on developing a transportation management platform that
streamlines operations for both public transport operators and passengers. The system includes a
central admin panel for overseeing routes, fleets, and drivers. Operators can create and manage
 their own organizations with assigned drivers and routes, while drivers handle assigned trips and
validate rider tickets. Passengers can easily purchase tickets, view upcoming trips, and receive
real-time notifications, all aimed at enhancing the public transportation experience.
Responsibilities:
- Implemented new features and UI logic, and resolved bugs to keep user-facing flows stable and
reliable.
- Coordinated and distributed tasks among the frontend developers as the team lead, keeping delivery
on track.
- Integrated the Google Maps API (Google Maps, Google Search) to power location, routing, and live
trip-tracking features.
- Integrated analytics to track user behaviour and give the team insight into how the product was used.
- Set up the project from scratch, establishing the initial architecture, tooling, and project structure.
- Covered components and containers with unit tests, increasing code reliability and coverage.
- Built responsive, adaptive markup and layouts across the application.
- Proposed and discussed improvements to both the UI and backend logic to improve the overall
product.
Technologies:Typescript, React, React Query, Vite, Jest, RTL, Redux, AWS

Platform for Property Management
Position: Full-Stack Developer
Team size: 7
Description: Platform for property management and short-term rentals, helping hosts list properties,
manage bookings, and automate tasks like pricing and guest communication to maximize rental
income and enhance the guest experience.
Responsibilities:
- Built responsive, adaptive markup and layouts across the application.
- Implemented new features and logic on the frontend, delivering user-facing functionality end to end.
- Covered components and containers with unit tests, increasing code reliability and coverage.
- Resolved bugs on both the frontend and backend to keep the platform stable and reliable.

Technologies: Typescript, React, React Query, AWS, NestJS, PostgreSQL, NodeJs, Preact, Vite, Jest,
RTL, Redux

Admin Panel for Health Care
Position: Fullstack Developer
Team size: 3
Description: Development of an admin panel for a company that specializes in matching medical
specialists to user needs.
Responsibilities:
- Built responsive, adaptive markup and layouts across the application.
- Discussed and clarified requirements directly with the client to make sure the work matched their
needs.
- Wrote technical documentation so the team could understand and maintain the functionality.
- Implemented new features and logic on both the frontend and backend, delivering functionality end to
end.
- Resolved bugs across the application to keep it stable and reliable.
Technologies: Typescript, React, React Query, AWS, ExpressJS, Sequilize ORM, NodeJS
Mental Health Tracker System Position:
Team Lead
Team size: 5
Description: A web based Mental health tracker system dedicated to producing mental healt solutions,
where Customers can input their behaviours and check their progress. Its mission is to improve society’s
mental and physical health by giving the tools to see just how small decisions can impact their lives.

Responsibilities:
- Built responsive, adaptive markup and layouts across the application.
- Implemented new features and logic for the platform.
- Wrote technical documentation so the team could understand and maintain the functionality.
- Discussed and clarified requirements directly with the client to keep the work aligned with their needs.
- Suggested product improvements based on how the system was used.
- Proposed solutions to problems that came up and implemented them.
- Resolved bugs across the application to keep it stable and reliable.
Technologies: React, React Saga, Javascript

Centralized Managing Work Media Accounts
Position: Frontend Developer
Team size: 10+
Description: Web application for centralized managing a bunch of work and social media accounts
where the main role plays is LinkedIn integration.
Features:
● Authorization;
● LinkedIn, Facebook, Twitter, Zapier, Hyperize and email integrations;
● Team, groups and campaigns;
Responsibilities:
- Built responsive, adaptive markup and layouts across the application.
- Researched and evaluated libraries to choose the right tools for the project.
- Covered components and containers with unit tests, increasing code reliability and coverage.
- Implemented new features and logic for the application.
- Resolved bugs across the application to keep it stable and reliable.
Technologies: Typescript, React, React Query, React Lazy, RTK, Jest

SevenPro

Jun 2021 – Apr 2023

Role: Frontend Developer
Project Name: Pump Company
Description: Website for a company engaged in the sale of equipment and service for the provision
of pumping stations during construction. Also, the company provides specialists for training in the
use of special equipment
 Responsibilities:
- Markup
- UI-related changes with an adaptive approach
- Implementation of new features and logic for rendering new equipments on page
- Bug fixes
Technologies: JavaScript, HTML, CSS, JSON, Webpack
Role: Frontend Developer

Role: Frontend Developer
Project Name: Admin panel
Description: The company is engaged in the creation of sensors for tracking problems in pipelines.
The goal was to create an administration panel for companies to track pipe problems in
sub-territories and to fix the breakdown sooner.
Responsibilities:
- Markup
- UI-related changes with an adaptive approach
- Libraries researching: React testing libraries, Jest
- Covered components and containers with unit tests
- Implementation of features and logic
- Bug fixes
Technologies: Typescript, React, Styled-components, React Testing Library, Jest

Project Name: Weather App
Description: The training project for checking the weather forecast in cities. The web application
shows you the current weather in your city and for the next 5 days. Also, you can add cities to your
favorite. And from the "Favourite" page you can check the weather in your favorite city faster.
Responsibilities:
- Implementation of features and logic
- Libraries researching: Redux toolkit with Redux Query, React Router
- Bug fixes
- UI-related changes with an adaptive approach
Technologies: TypeScript, React, Styled-Components, Redux Toolkit, React Query, React Router
Role: Frontend Developer

Project Name: Rent bicycle app.
Description: Web application about renting bicycles in accessible cities. The user chooses the city
and can to see in a live stream where is the nearest bike that he can rent. Then he should choose a
time for rent and make a payment.

Responsibilities:
- Libraries researching: Stripe API, Redux toolkit, React routers
- Implementation of new features and logic
- UI-related changes with an adaptive approach
- Bug fixes
Technologies: Javascript, React, Redux toolkit, React routers, Styled components

Role: Frontend Developer
Project Name: Cinema website
Description: The training project is for finding movies with the ability to edit and add your movies.
Responsibilities:
- UI-related changes with an adaptive approach
- Markup
- libraries researching: Formik
- Implementation of features and logic for edit and add films
- Bug fixes
Technologies: JavaScript, React, React Context, Styled-Components

EDUCATION

University: «KhNUE», Kharkiv
Graduation: September 2020 – June 2024
Faculty: Information Technology
Specialty: Computer Science
Status: Received a Bachelor's degree in “Computer Science”

University: «KhNU» Karazin University, Kharkiv
Graduation: September 2024 – December 2025
Faculty: Information Technology
Specialty: Cybersecurity
Specialty: Received a Master's degree in “Cybersecurity”

COURSES

Course: «Skill-up» November
2020 - May 2021
Course direction: «Javascript» with learning React (basic) and Node.js (basic)

LANGUAGES

Ukrainian – Native

English – Upper-Intermediate