Mariia Prylypchenko, Developer in Lviv, Lviv Oblast, Ukraine
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Mariia Prylypchenko

Verified Expert  in Engineering

Back-end Developer

Lviv, Lviv Oblast, Ukraine
Toptal Member Since
September 6, 2022

Mariia is a self-taught and highly motivated back-end developer with over three years of experience in the field. Skilled in several technologies, programming languages, and frameworks, she has been focusing on the web since 2014 because she was attracted by the infinity of solutions that can be designed and implemented. Mariia aims to improve life through modern technologies and creativity.


Node.js, TypeScript, Express.js, GraphQL, Amazon S3 (AWS S3), AWS Lambda...
Node.js, TypeScript, React, Redux, Vue, PHP, Doctrine, Twig, HTML, CSS...
Freelance Clients
TypeScript, GraphQL, Mongoose, MongoDB, React, Redux, Ant Design, Bootstrap...




Preferred Environment

Ubuntu, Slack, IntelliJ IDEA

The most amazing...

...automation I've proposed and developed helps to reduce the team's monthly workload by more than 25%.

Work Experience

Back-end Developer

2021 - PRESENT
  • Integrated device-specific feeds, optimized the performance, and maintained the AWS infrastructure.
  • Propagated and maintained over 95% test coverage on multiple services.
  • Developed several proofs-of-concept (POC), including an NFT concept using Solidity.
  • Trained and supported the new team members during the onboarding process.
Technologies: Node.js, TypeScript, Express.js, GraphQL, Amazon S3 (AWS S3), AWS Lambda, Azure Functions, MongoDB, PostgreSQL, Solidity, MongoDB Atlas, REST APIs, GitHub API, Azure, Apache Kafka

Full-stack Web Developer

2020 - 2021
  • Performed back-end development tasks with PHP, Zend2, Doctrine, Symphony for a console application, and more.
  • Developed the front end with a responsive design using Vue.js, React, Redux, jQuery, Twig, Gulp.js, Webpack, and more.
  • Fixed errors while refactoring and supporting the existing project.
  • Worked with EPUB 2 and 3, synchronized multimedia integration language (SMIL) standards, and handled EPUB3 direct JavaScript extensions.
Technologies: Node.js, TypeScript, React, Redux, Vue, PHP, Doctrine, Twig, HTML, CSS, Symphony, REST APIs

Full-stack Web Developer

2019 - 2020
Freelance Clients
  • Owned the back-end development using TypeScript, GraphQL, Mongoose, and MongoDB and handled Stripe integration and testing.
  • Developed the front end with a responsive design using TypeScript, React, Redux, Ant Design, and more.
  • Fixed errors and refactored and reviewed code and documentation.
Technologies: TypeScript, GraphQL, Mongoose, MongoDB, React, Redux, Ant Design, Bootstrap, Stripe, MongoDB Atlas, REST APIs

Pluto TV
Pluto TV is a free ad-supported video streaming service. My role was to adapt existing data for different partners, for example, LG, TCL, Facebook, Samsung, etc., to be used on their infrastructure. I processed included big data sets formatting that was then provided via S3 or APIs. I also collaborated with my team on internal automation initiatives.

H&M Group
H&M Hennes & Mauritz AB, or H&M Group, is a multinational clothing company based in Sweden. I focused on API integrations for various projects; for example, I implemented an event listening service to process content updates from three different providers. I also worked on other experimental features that are under NDA.

CINE-BOOKS is a storytelling platform with unique content. My role was to support the platform infrastructure, research and develop new ways of delivering content while keeping it compliant with various protocols, and support UI improvements and API development.


Node.js, REST APIs, React, GitHub API, Vue, Doctrine, jQuery, Stripe


MongoDB Atlas, Slack, IntelliJ IDEA, Mongoose


TypeScript, JavaScript, GraphQL, PHP, HTML, CSS, Solidity


Amazon S3 (AWS S3), MongoDB, PostgreSQL, MySQL


AWS Lambda, Azure Functions, Ubuntu, Azure, Apache Kafka


Redux, Express.js, Twig, Ant Design, Bootstrap



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