Ivan

IVAN CHORNYI
Full-Stack Engineer | React & Node.js
Odesa, Ukraine | [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація»)
[відкрити контакти](див. вище в блоці «контактна інформація») | github.com/theIvanChornyi

SUMMARY
Full-Stack Engineer with 4+ years of commercial experience building and maintaining web applications with
TypeScript, React and Node.js. Own features and backend services from requirements and technical design
through implementation, testing, deployment and post-release support. Experience includes payment workflows,
background processing, API integrations and legacy codebases across fintech and property management.
Contribute to architecture decisions, code reviews and developer mentoring, with a focus on reliable,
maintainable solutions.

TECHNICAL SKILLS
Backend: Node.js, NestJS, Express.js, REST APIs, webhooks, Bull, Redis
Data & reliability: PostgreSQL, Prisma ORM, Firestore, database transactions, idempotent request handling,
retries and timeouts
Frontend: React, Next.js, TypeScript, JavaScript, React Query, Redux, HTML, CSS, Tailwind CSS, React Native
Tools & platforms: Docker, AWS S3, Firebase, MongoDB, Supabase, Git
AI workflow: Cursor and Codex for feature design, coding, debugging and tests; GitHub Copilot for code review

PROFESSIONAL EXPERIENCE

Incode Group | Full-Stack Developer
Dec 2024 - Present

HostEasy (NDA) | Dec 2024 - Apr 2026
Property management platform automating workflows for Airbnb property owners.
• Owned the design and implementation of booking and calendar task scheduling with Bull and Redis, covering
scheduling logic, configurable task types and reusable templates.
• Delivered task configuration import/export across properties, enabling owners to reuse complete workflows.
• Designed the data layer for properties, tasks and templates in Firestore, with Firebase Storage for media and
Realtime Database for activity logs.
• Owned PriceLabs pricing and smart home integrations, implementing webhook processing, manual calendar
sync and device control through vendor APIs.
• Took responsibility for the reliability of backend communication with external AI services, implementing retries,
timeouts, fallbacks and health-check alerts.
Stack: Next.js, Node.js, Express.js, Firebase, Bull, Redis, Chart.js, Docker

Lucid Dreams | Frontend Developer
May 2024 - Nov 2024 | Startup
Financial planning product with a spreadsheet-style interface, formulas and budget templates.
• Owned delivery of the user interface and budgeting templates for a startup financial planning platform.
• Built analytics dashboards with charts and reports to present financial planning data.
Stack: Next.js, Chart.js

Ivan Chornyi | Full-Stack Engineer 1

PROFESSIONAL EXPERIENCE - CONTINUED

CGS-team | Full-Stack Developer
Feb 2023 - May 2024

Crypto-Banking (NDA) | Aug 2023 - May 2024
Platform supporting fiat and cryptocurrency deposits, withdrawals and exchanges.
• Owned backend delivery of fiat and cryptocurrency deposit, withdrawal and exchange functionality across
multiple payment gateways.
• Designed transaction handling with idempotent requests and PostgreSQL transactions through Prisma to
prevent duplicate processing and maintain consistent financial data.
• Integrated two-factor authentication into withdrawal and exchange workflows to protect sensitive financial
actions.
• Built transaction analytics dashboards and reports, and integrated a third-party service for user-admin chat.
Stack: Next.js, Node.js, NestJS, PostgreSQL, Prisma ORM, Chart.js, Docker

Linkup (NDA) | Jul 2023 - Feb 2024
Event ticketing product with React and React Native clients.
• Owned delivery of ticket payment functionality using Stripe, including backend payment integration.
• Implemented search and recommendations, customizable user profiles and an interactive administration panel.
• Took responsibility for complete features spanning frontend interfaces and backend functionality across the
web and mobile product.
Stack: React, React Native, NestJS, PostgreSQL, Prisma ORM, AWS S3, Stripe, Docker

LFG | Apr 2023 - Jul 2023
Owned cryptocurrency payment functionality and Merkle Science integration for wallet and transaction analysis;
built an analytics dashboard.
Stack: React, NestJS, PostgreSQL, Prisma, Ethers.js, Web3.js

Memex | Mar 2023 - Apr 2023
Developed ERC20 reward claiming, smart contracts and winner-selection logic. Used PostgreSQL with Prisma
and Supabase Realtime for live winner updates.
Stack: Next.js, NestJS, Supabase, Ethers.js, Web3.js, Hardhat

Chore App | Feb 2023 - Mar 2023
Owned scheduled greeting-card delivery functionality, combining cron-based processing, SMTP integration and a
calendar dashboard.
Stack: React, React Query, Express.js, PostgreSQL, TypeORM

EDUCATION & LANGUAGES
Automation Engineering | Admiral Makarov National University of Shipbuilding
English: Upper Intermediate

Ivan Chornyi | Full-Stack Engineer 2