Олег

Oleh Chernov Full-Stack Developer
[відкрити контакти](див. вище в блоці «контактна інформація») [відкрити контакти](див. вище в блоці «контактна інформація») Odesa, Ukraine LinkedIn Telegram

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Summary
Full-Stack Developer with 3 years of commercial experience building production web products on TypeScript, Next.js
and NestJS. Over the past year I've shipped eight products as one of the core developers - a bus ticketing platform, a
social-media automation SaaS, a US-market cashback platform and a tender-processing CRM - owning features from
the Postgres schema to the deployed interface, including a zero-downtime backend migration on a live platform. I
take slow products out of the red zone: Lighthouse scores from 50-60 to 85-100 on multiple production sites.
Background in Computer Science and Physics.

Skills
Languages: TypeScript, JavaScript (ES6+), SQL
Frontend: React, Next.js (App Router, SSR/SSG/ISR), Redux Toolkit, TanStack Query, Zustand, Tailwind CSS, Sass,
shadcn/ui, React Hook Form, Zod, HTML5, CSS3
Backend: Node.js, NestJS, Express.js, REST API, GraphQL, WebSockets
Databases: PostgreSQL, Prisma, TypeORM, Redis
DevOps: Docker, GitLab CI, GitHub Actions, Git, Vercel, Railway, AWS, Nginx
Practices: OOP, SOLID, Code Review, Agile/Scrum, Web Performance, Core Web Vitals, Technical SEO
Spoken: English - Intermediate (B1), Ukrainian - Native

Professional Experience
Full-Stack Developer, Foxycode.tech 09/2025 – Present
Shipped 8+ production web products in one year as one of the core developers - booking,
• Remote
SaaS, e-commerce, affiliate and CRM platforms with a combined peak audience of 5,000+
users - on Next.js, NestJS, PostgreSQL and Docker.
Migrated a live booking platform's backend from Strapi to NestJS with zero downtime:
•

moved the production data across, rebuilt trip, carrier and pricing logic as a typed service
layer, and cut traffic over while users kept booking.
Lifted Lighthouse performance scores from the 50-60 red zone to 85-100 across multiple
•

production sites by cutting LCP, JS bundle size and render-blocking load.
Built the end-to-end booking flow for an intercity bus platform aggregating carriers across
•

Ukraine and Europe: multi-carrier trip search, a 5-tier discount engine, card payment and
QR ticket delivery to email and Telegram, plus admin, carrier and dispatcher back-offices.
Delivered the cashback and payout engine for a US pet-care affiliate platform spanning
•

100+ brands and 30,000+ partner stores: affiliate tracking, pending/approved payout
lifecycle, CSV import parsers, a reporting module, custom admin, Google and Apple
OAuth, and the Chrome-extension connect flow.
Built Instagram, TikTok and Telegram publishing integrations for a social-media
•

automation SaaS: scheduled auto-posting, post and Story publishing, multi-profile
workspaces.
Owned delivery end to end - Docker, GitLab CI and GitHub Actions pipelines, deploys to
•

Vercel and Railway, database migrations. Onboarded new developers and ran code
reviews.
Full-Stack Developer, Freelance 02/2024 – 08/2025
Delivered 5 client projects as a white-label subcontractor: marketing sites and landing
• Remote
pages on Next.js with self-serve admin panels on Payload CMS.
Owned the full cycle on each - build, hosting, domain, deployment and post-launch
•

support - plus technical SEO: metadata, structured data and Core Web Vitals.
Web Developer, Tvoyo 12/2022 – 04/2023
Built an internal sales CRM: data parsers feeding the order pipeline and a Telegram
• Mykolaiv, Ukraine
integration that delivered new orders to the sales team in real time.
Modernized the storefront - product carousels, UI components and bug fixes.
•

Owned the full deployment cycle - domain, hosting and production stability - and ran
•

technical SEO on metadata and page load.

Education
Master's Degree, Physics, V.O. Sukhomlynskyi Mykolaiv National University 2021 – 2023
Bachelor's Degree, Computer Science, V.O. Sukhomlynskyi Mykolaiv National University 2017 – 2021