V
valentyn nikolaiev
From Ukraine 12:48 AM (GMT+02:00)
$25/hr or $40,000/yr

Active over a week ago


Member since Feb 2026

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Senior Full Stack engineer

Full-Stack Engineer
Available for hire
Years of experience
11+ years
Experience level
Senior
Available for
Full-time, Part-time, Contract
Available from
24 Jun 2026

Senior Full-Stack Engineer with 10+ years of experience building scalable, user-centric web applications across high-traffic consumer and enterprise platforms. Deep expertise in React, Next.js, Node.js, and TypeScript, with a strong track record of driving frontend architecture, backend service design, and cloud-native deployments using AWS. Adept at mentoring engineers, leading cross-functional initiatives, and optimizing systems for performance, accessibility, and reliability.

Employment History

Senior Software Engineer at Redian Software Current 2021 - Now
-Developed and maintained a high-performance e-commerce platform using React, Next.js, and TypeScript, creating responsive and accessible user interfaces for pet product browsing, cart management, and checkout experiences. -Leveraged Next.js server-side rendering (SSR) and static site generation (SSG) to optimize page performance and enhance SEO for product listings and pet care content.
Senior Software Engineer at INFONET 2019 - 2021
-Developed React frontend with Next.js and TypeScript, using Redux Toolkit for state management to handle complex client dashboard interactions, styled with Tailwind CSS for WCAG-compliant tax reporting interfaces, and optimized with getServerSideProps for SSR. -Built Node.js APIs with Express and TypeScript, securing endpoints with jsonwebtoken for JWT authentication and crypto for encryption, integrating with Salesforce and QuickBooks for seamless client data workflows. -Designed MySQL schemas with Prisma and @prisma/client for type-safe queries, incorporating Redis caching via ioredis to optimize frequent financial data retrieval, with encrypted fields for compliance data. -Deployed on AWS using Elastic Beanstalk for Node.js scaling, Aurora MySQL for database hosting, ElastiCache for Redis, S3 with KMS encryption for document storage, and API Gateway for secure endpoint management.
Full-stack Engineer at Etsy 2014 - 2019
-Developed responsive, dynamic e-commerce interfaces using React and vanilla JavaScript, enhancing customer engagement through seamless product browsing and checkout experiences. -Built RESTful APIs with Node.js to handle user authentication, order processing, and inventory updates, integrating MySQL for reliable data storage and retrieval. -Collaborated closely with designers and backend engineers in an agile environment, translating mockups into pixel-perfect UI components while ensuring consistent cross-browser compatibility with HTML5 and CSS3. -Streamlined the development workflow using GitHub for version control, implementing pull request reviews and branch strategies to maintain clean, testable code and reduce bugs in production. Participated in end-to-end deployment processes, from local development to staging and production, using CI/CD pipelines and npm scripts to automate builds, linting, and testing.

Education

Bachelor of Computer Science at Odesa National University of Technology 2010 - 2014