Pavel Tumash, Developer in Kraków, Poland
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Pavel Tumash

Verified Expert  in Engineering

Front-end Engineer and Software Developer

Kraków, Poland
Toptal Member Since
March 2, 2023

Pavel is a highly-experienced front-end engineer with more than seven years of professional experience, including four years of remote work. His expertise lies in designing and implementing intuitive and user-friendly interfaces for various websites and web applications. Pavel is particularly passionate about utilizing React, TypeScript, and GraphQL to bring his designs to life.


FKA Brands
Front-end, JavaScript, HTML, CSS, eCommerce, User Interface (UI)...
React, HTML, CSS, JavaScript, TypeScript, Next.js, HTML5, UI Elements
React, TypeScript, Apollo, GraphQL, Storybook, Jest, Slack API, HTML, CSS, Git...




Preferred Environment

MacOS, Atom, GitHub

The most amazing...

...thing I've built is a web app for police body cams that streamlines video editing, which is a notable accomplishment for improving law enforcement efficiency.

Work Experience

Front-end Developer

2023 - 2024
FKA Brands
  • Integrated AI search and subscription functionality into an eCommerce website, increasing conversion rates and usability for the client.
  • Rewrote an old jQuery website to meet modern standards, significantly improving its performance and enhancing accessibility and SEO.
  • Automated the deployment process, improving the speed and quality of the release cycle.
Technologies: Front-end, JavaScript, HTML, CSS, eCommerce, User Interface (UI), User Experience (UX), BigCommerce, Handlebars, Stencil.js, Shogun, Algolia, Ordergroove

UI/UX Developer

2023 - 2023
  • Worked on a project focused on developing an array of reusable UI components for a dynamic, bank-centric CMS. This initiative significantly improved the design aesthetics and user experience by replacing standard components with custom ones.
  • Designed components to be adaptable for various use cases, providing CMS developers with the flexibility to integrate them into diverse scenarios and applications.
  • Successfully built a demonstrative and test application to educate other developers about various use cases. This tangible learning tool provided insights into the effective implementation and integration of the created UI components.
Technologies: React, HTML, CSS, JavaScript, TypeScript, Next.js, HTML5, UI Elements

Front-end Engineer

2021 - 2023
  • Led the effort to migrate existing monolith applications to a monorepo structure and implement a set of tools to streamline the process as a member of the Toptal core team.
  • Optimized our CI cost and runtime, resulting in a 30% increase in speed for test runs.
  • Collaborated with the design team to develop a web application to manage event attendance for a community of talented individuals.
Technologies: React, TypeScript, Apollo, GraphQL, Storybook, Jest, Slack API, HTML, CSS, Git, Front-end, Next.js, HTML5

Senior Front-end Engineer

2019 - 2021
EPAM Systems
  • Utilized the Web Components, Shadow DOM, Stencil.js, React, and Storybook to create a unified design library capable of supporting a wide range of front-end applications, from legacy jQuery apps to the latest React and Angular technologies.
  • Set up a monitoring tool, Sentry, which effectively tracks and addresses bugs in our software systems.
  • Collaborated closely with component library users and stakeholders to address their concerns and ensure their needs were met.
  • Created comprehensive documentation using Storybook to make our library more straightforward for users.
Technologies: Stencil.js, Web Components, React, Angular, TypeScript, CSS, HTML, Storybook, GitLab, Git, Front-end, HTML5

Software Engineer

2015 - 2019
  • Participated in creating a web application that enables police departments to manage videos captured on their body-worn cameras.
  • Developed a browser tool that enables users to easily redact videos by applying masks to faces, as well as create bookmarks and reports from them.
  • Managed a team of three junior developers, providing guidance and support to help them achieve their full potential.
  • Implemented unit testing from scratch for the front end, resulting in a 40% reduction in bugs.
Technologies: Knockout (Knockout.js), Angular, jQuery, JavaScript, CSS, HTML, C#, HTML5, Python

UBS Design System

A design framework used by dozens of teams around the world with various front-end technologies. It provides a unified approach to building digital products and services, with a framework-agnostic design system compatible with Vanilla JavaScript and a React version. The system is designed based on accessibility and usability principles. Also, it is scalable and modular, enabling teams to customize and extend the components according to their specific needs.

Vievu Body Cam

Vievu offers a body camera solution specifically designed for law enforcement agencies. In addition, It is an on-site system that empowers law enforcement agencies with the flexibility to manage their IT and video storage environments. This system enables them to act like redacting, sharing, and compressing video footage as needed.

While working on the solution, I introduced a new feature that enables users to create face masks for their videos directly in the browser. Furthermore, I added the ability to create bookmarks and subtitles for specific video parts.
2011 - 2015

Bachelor's Degree in Informatics and Applied Mathematics

Belarusian State University - Minsk, Belarus


React, Node.js, Slack API, jQuery, Handlebars


Git, React Apollo, Atom, GitHub, Mathematica, Stencil.js, GitLab, Shogun, Ordergroove


Jest, Redux, Cypress, Angular, Knockout (Knockout.js), Next.js


JavaScript, TypeScript, CSS, HTML, HTML5, GraphQL, C#, Python


Agile Software Development


BigCommerce, MacOS, Algolia


Storybook, Front-end, Styled-components, Apollo, Web Components, Informatics, UI Elements, eCommerce, User Interface (UI), User Experience (UX)

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