Дмитро

FRONT-END DEVELOPER

Dmytro Rybalchenko
Summary

Contacts

Experienced Front-End Developer with 6+ years of hands-on Kiev, Ukraine

expertise in building responsive and scalable web applications using
React.js, Vue.js, TypeScript, and modern JavaScript (ES6+).

 [відкрити контакти](див. вище в блоці «контактна інформація»)

Acted as Middle to Senior Developer on multiple commercial [відкрити контакти](див. вище в блоці «контактна інформація»)

projects, contributed to hiring through technical interviews, @DmytroRyba

onboarding and mentorship of junior developers. Known for
optimizing performance, maintaining legacy codebases, and Dmytro1231
delivering production-grade features in fast-paced teams.

Education Courses Languages
(2017-2021)
(2018-2019)
English

B2

Kyiv Technical School of
Computer Academy Step
Electronic Devices

Ukrainian

C2

Computer engineering Russian C1

Tools
JavaScript (ES6+), TypeScript, React.js, Next.js, Vue, Nuxt, GSAP, React Router, Zustand
Redux Toolkit, Redux-Thunk, Redux-Saga, Recoil, Vuex, Pinia, MobX, React Hook Form, Formic
HTML5, CSS3, SCSS, SASS, CSS Modules, Styled-components, MUI, Bootstrap, Ant Design, Tailwind,
Lodash
REST API, GraphQL, Apollo Client, Axios, Fetch API, RTK Query useQuery, WebSockets
Jest, React Testing Library, Enzyme, Storybook, Webpack, Parcel, NPM/Yarn, Git, Figma
Agile, Scrum, Kanban.

Work Experience
Front-end Developer | WellTech Feb 2022 - Present

Project: Multilingual Translation Platform
Multilanguage translation platform, for businesses and people
Responsibilities:
Developed and maintained the platform using React 18, TypeScript, Next.js 14, and Styled Components. Utilized
MUI and custom hooks to create a responsive and scalable UI
Implemented file upload and processing (PDF, text, etc.) via filestack-react, and integrated external AI and
machine translation APIs
Built user-driven translation workflows, allowing automatic, machine-based, or native speaker translations
Developed key user features including login, registration, password recovery, and rich text editing with
advanced formatting options and translation versioning
Integrated payment systems and access control mechanisms
Supported and migrated legacy features from the previous version, which used Vue.js-based custom UI
components.
Achievements:
Optimized file upload and processing, reducing user wait times by 35%
Successfully transitioned to a new architecture with minimal downtime and full compatibility with existing
business logic
Improved translation quality and user experience by providing flexible translation options (AI vs. Human).

Technologies:
TypeScript, React 18, Next.js 14, Styled Components, MUI, Axios, Day.js, filestack-react, Vue.js (legacy), Custom
Hooks, RESTful API, GraphQL, Gitlab, Jest.

Project: Fitness & Nutrition App
Cutting-edge fitness app for user profiles, fitness goal tracking and gym management

Responsibilities:
Development and enhancement of features using TypeScript, Vue.js, React.js, Next.js, Redux and Vuex.
Integration with GraphQL and RESTful API for efficient data exchange
Employed Styled Components, Gsap, and D3.js to create engaging animations, dynamic dashboards, and
streamlined data visualization
Participated in agile development cycles, contributing to sprint planning and retrospectives.

Achievements:
Integrated Gsap for engaging animations, fostering a more visually appealing user experienc
Rigorous testing procedures improved application stability, resulting in a more reliable U
Introduced efficient data synchronization methods, resolving integration challenges. 17% reduction in data
inconsistency issues and a 23% improvement in data exchange speed.

Technologies:
TypeScript, JavaScript, React.js, Next.js, Reselect, Webpack, Styled Components, Vue.js, Vuex,Pinia, Gsap, Formik,
GraphQL, RESTful API, Gitlab, Figma, Redux Toolkit, React-Router and Jest.

Front-end Developer | Teymax May 2020 - Feb 2022

Project: Poject for the German travel company
Platforms where users can find and book a tour to anywhere in the world, and fully configure their trip, from
choosing a country, or hotel, ending with a seat class on an airplane, parking rental, etc.

Responsibilities:
Actively participating in the code transition from class to functional components, improving overall code
readability and efficiency
Fixing bugs and implementing minor new features according to product requirements
Conducting code reviews to enhance code quality and adhere to standards
Collaborating closely with back-end developers to ensure effective front-end and back-end interaction.
Perfoming testing to ensure application stability.

Achievements:
Successful transition from class to functional components, improving overall code maintainability and speeding
up development
25% increase in test coverage, ensuring higher reliability and stability of the web platform
Introduced efficient data synchronization methods, resolving integration challenges. 17% reduction in data
inconsistency issues and a 23% improvement in data exchange speed
Integration of Reselect for data selection optimization, leading to improved client-side interface pergomance.

Technologies:
TypeScript, JavaScript, React.js, JavaScript, RxJs, i18n, Jest, Gitlab, bitBucket, Zeplin, post-css, ramda, reselect,
custom, ui-library
Project: Digital Twin Platform
With this technology, companies increase productivity, reduce new product development time, ans avoid costly
hardware defects. Engineers no longer need to create expensive physical prototypes - all ideas and calculations
can be tested on virtual models first. This can provude the flexibility and agility needed to respond to an ever-
changing environment.

Responsibilities:
Implementantion of Material UI and Redux-Saga for creating a modern interface and managing asynchronous
operations
Active participation in developing new features to expand the platform’s capabilities
Code reviews and refactoring to improve code quality and otimize perfomance
Collaboration with designers to establish a cohesive design style
Time optimization in development using TypeScript and other modern technologies
Enhancement of user experience through the integration of Scss.

Achievements:
My work contributed to improved team efficiency, making the platform more appealing and useful to users,
resulting in significant business improvements.

Technologies:
React.js, Redux, Material UI, Redux-Saga, Scss, i18n, TypeScript, JS, Gitlab

Front-end Developer | AgileEngine March 2019 - May 2020

Project: The Product for small business’ world trade
Contributed to the development of a product aimed at accelerating world trade for smallbusinesses. The
application streamlines accounting documentation, making it simple, frictionless, instant, and automated.
It centralizes financial data to facilitate tax preparation and provides insights into the health of
businesses.

Responsibilities:
Designing and implementing the user interface to ensure a seamless and user-friendly experience
Enhancing and refinig user options for improved client comprehension and ease of use
Collaborating with cross-functional teams to integrate features and maintain application cohesion
Developing dashboards to provide users with meaningful insights into their financial data
Utilizing technologies such as React JS, Restful API, GraphQL, and Redux Toolkit to optimize application
functionality
Participating in agile development cycles, including sprit planning and retrospectives.

Achievements:
These efforts collectively led to a more robust and user-friendly product, with measurable improvements in user
engafement, satisfaction and overall perfomance.

Technologies:
TypeScript, JavaScript, React.js, JavaScript, GraphQL, Lodash, Scss, Redux, Toolkit, Figma, Github