Oleksandr

Oleksandr Myronchuk
Middle Fullstack Developer
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SUMMARY
Fullstack Developer with 3+ years of commercial experience building modern, high-performance web applications
end-to-end — from React/Next.js user interfaces to Node.js backend services and databases.
Strong on the frontend across the React ecosystem, scalable architectures, and internal CRM/ERP systems, with a
solid command of the backend: designing REST APIs, data models, and server-side logic with Fastify and Express.js.
Experienced in building responsive, dynamic applications with React, Next.js, and TypeScript, and in implementing
the services behind them — authentication (JWT), relational and document data layers (PostgreSQL / Prisma,
MongoDB / Mongoose), Redis caching, and scheduled jobs with node-cron.
Delivered Telegram Mini Apps and Chrome Extensions with full backend integrations, and set up containerized
environments and CI/CD pipelines (Docker, GitHub Actions).
Proven track record of mentoring junior developers, improving project architecture, and resolving complex
performance bottlenecks. Driven by a passion for delivering high-quality, performance-optimized products that
solve real business challenges and provide outstanding user experiences.

TECHNICAL SKILLS
Frontend: React, Next.js, TypeScript, JavaScript (ES6+), TanStack Query, Redux Toolkit, Zustand, SCSS, Tailwind CSS,
Styled Components, i18next, React Hook Form, Zod, Swiper.js, REST APIs
Backend: Node.js, Fastify, Express.js, Prisma ORM, Mongoose, REST APIs, JWT, node-cron
Databases: PostgreSQL, Redis, MongoDB
Infrastructure & DevOps: Docker, Docker Compose, GitHub Actions, CI/CD pipelines, ngrok
Tools & Workflow: Vite, Webpack, Git, GitHub, Bitbucket, npm, yarn, ESLint, Prettier, Biome, Figma, Jira, Trello,
Asana
Additional: Telegram Mini Apps Development, Chrome Extensions Development, SEO Optimization, API Integrations,
Headless CMS (Strapi)
Methodologies: Agile, Scrum, Component-Driven Development, Code Review Culture

AREAS OF EXPERTISE
• Building full-cycle web applications — from component-driven React/Next.js frontends to Node.js (Fastify /
Express.js) backend services — with a focus on performance, scalability, and maintainability.
• Designing and implementing REST APIs, authentication and authorization flows (JWT), and server-side business
logic.
• Modeling and working with relational and document databases — PostgreSQL with Prisma ORM and MongoDB
with Mongoose — including schema design, migrations, and query optimization.
• Implementing Redis caching, and scheduled / background tasks with node-cron.
• Designing and building CRM and ERP systems with a modern frontend architecture and supporting backend.
• Developing Telegram Mini Apps and Chrome Extensions with backend integrations and external API usage for
automation, productivity, and business workflows.
• Setting up Docker / Docker Compose environments and CI/CD pipelines with GitHub Actions for reliable builds
and deployments.
• Migrating legacy codebases to modern frameworks while maintaining functionality and improving performance.
• Collaborating effectively with frontend , backend, QA, and design teams to deliver cohesive, end-to-end product
solutions.
• Mentoring junior developers, performing code reviews, and maintaining clean coding standards.

JOB EXPERIENCE
Star Way | Fullstack Developer
Feb 2023 – August 2026
Built and maintained complex products end-to-end, including CRM/ERP platforms, internal dashboards, and client-
facing applications — developing both the React / Next.js / TypeScript frontends and the Node.js (Fastify) backend
services behind them. Focused on scalable architecture, performance optimization, and long-term maintainability
of production systems.
Key impact:
• Improved application performance (~40%) by optimizing rendering behavior, reducing unnecessary re-renders,
and improving bundle structure.
• Designed and implemented reusable component systems used across multiple internal products (dashboards,
CRM modules).
• Developed backend services with Node.js (Fastify) — REST APIs, JWT authentication, and server-side business
logic backed by PostgreSQL / Prisma ORM and Redis caching.
• Implemented scheduled and background jobs with node-cron for recurring business processes and data
synchronization.
• Initiated and led the adoption of modern technologies (TanStack Query, Tailwind CSS, React Hook Form + Zod),
improving development speed and code consistency across the team.
• Developed Telegram Mini Apps integrated with backend services and CRM systems, ensuring smooth UX and
high responsiveness under real-world usage.
• Built a completely new company website with Next.js on a modern React/TypeScript stack, delivering major
improvements to performance, SEO, UX, and maintainability.
• Set up Docker / Docker Compose and GitHub Actions CI/CD to streamline local development and deployments.
• Mentored junior developers, performed code reviews, and improved overall code quality and architecture
practices within the team.

WhiteDev | Fullstack Developer (Part-time)
Nov 2023 – Feb 2025
Developed and maintained web applications and Chrome Extensions in the entertainment and productivity
domains, working across the stack — from frontend and extension architecture to backend content services and API
integrations.
Key impact:
• Built and maintained Chrome Extensions with a focus on performance, stability, and cross-browser compatibility.
• Developed reusable UI components and improved rendering and load performance across multiple projects.
• Ensured modular, scalable architecture using TypeScript and modern patterns.
• Implemented backend logic with a headless CMS (Strapi) — custom APIs, content models, and permissions —
and integrated it with React / Next.js frontends.
• Integrated external APIs, analytics tools, and third-party services into frontend and backend applications.

EDUCATION
Bachelor’s Degree, Information Technology — Sumy State University (2020–2022)
Junior Specialist, Information Technology — Zhytomyr Agrotechnical College (2016–2020)

LANGUAGES
Ukrainian — C2 (Native)
English — B1 (Intermediate)