Дмитро

DMYTRO HOLUBIEV
Warsaw | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

SUMMARY
Frontend engineer with 9+ years of experience building data-intensive web applications using
JS/TypeScript and React.

Focused on designing and delivering production systems end-to-end — from architecture and proof-of-
concept to release and long-term support. Led development of multiple applications, handling complex
data flows, high reliability requirements, and strict UX constraints.

Experienced in integrating AI-driven features (chat interfaces, external AI services, camera/data processing
pipelines) into real-world products. Strong background in async state management (React Query),
performance optimization, and building scalable frontend architectures.

Comfortable owning technical decisions, setting up CI/CD pipelines, and working across product, design,
and engineering to ship reliable, maintainable software.

EXPERIENCE

Senior Frontend Engineer (09/2025 to Current)

JTI - Warsaw, Poland

Worked on a large-scale, multi-tenant web platform allowing different markets (countries) to configure and
run customized versions of the product.

Developed and maintained features in a complex application built around a flexible builder system
and custom UI components
Implemented country-specific requirements, including legal and regulatory constraints (e.g. tobacco
sales restrictions, regional compliance rules)
Built and extended GraphQL-based data layer, integrating it with React Query for efficient server-state
management
Worked with Next.js to deliver performant, SEO-friendly pages and handle hybrid rendering (SSR/CSR)
Contributed to a large shared codebase with extensive test coverage, maintaining reliability while
shipping new features
Collaborated with cross-functional teams to support multiple markets with differing business logic
and UX requirements

Stack: TypeScript, React, Next.js, GraphQL, React Query, Jest, Testing Library

Lead Frontend Engineer (10/2024 to 09/2025)

MIQ - Warsaw, Poland
Leading frontend development of a large-scale analytics platform used by global brands (Coca-Cola, Pepsi,
Nike) for sales tracking, audience analysis, and campaign performance.

Designed and implemented frontend architecture for a data-heavy platform handling large datasets
with real-time updates
Built complex dashboards (charts, maps, filterable tables) optimized for performance and usability
under high data load
Integrated AI-generated forecasts into the UI, enabling users to explore predicted sales trends,
demographic changes, and campaign outcomes
Implemented an AI assistant for natural language queries over analytical data (historical + predictive)
Developed advanced data visualization features (map overlays, segmentation by region, gender, age,
campaign metrics) with dynamic filtering
Collaborated with data science and backend teams on data contracts, async flows, and performance
constraints
Led and mentored frontend engineers: defined architecture, enforced coding standards, and
conducted code reviews
Worked closely with product/design to translate complex analytics into usable interfaces for
enterprise users

Stack: TypeScript, React, Redux, React Query, React Router

Senior Frontend Engineer (04/2024 to 10/2024)
Conbo.ai - Dnipro, Ukraine

Built an AI-driven admin panel from scratch for managing and visualizing large volumes of asynchronously
loaded data.

Designed and implemented scalable frontend architecture optimized for heavy async data flows and
real-time updates
Built dynamic dashboards and complex charts driven by continuously updating data streams
Integrated an AI assistant enabling natural language queries over datasets, with contextual results
rendered directly in the UI
Developed a fully interactive SVG map with custom mapping logic, coordinate calculations, and
dynamic overlays for location-based metrics and predictions
Handled complex state management and server-state synchronization using React Query and Zustand
Set up and maintained development tooling, testing, and code quality processes (Jest, Storybook,
ESLint, Husky)

Stack: TypeScript, React, MUI, Jest, Storybook, React Query, Zustand, React Router, ZITADEL, Vite, Husky,
Prettier, ESLint, Docker

Senior Frontend Engineer (08/2023 to 04/2024)

Impltech - Dnipro, Ukraine

Worked on multiple projects in banking and medical domains, contributing to the development of robust
admin panels and applications aimed at providing tailored solutions based on user input and data analysis.
Collaborated with cross-functional teams including BA, PM, UX, backend developers, and CTO to ensure
high-quality outcomes.
 Developed responsive admin panels and applications, implementing dynamic features based on user
data and feedback.
Collaborated with BA, PM, and UX teams to translate business requirements into technical solutions,
ensuring alignment with user needs and project goals.
Worked closely with backend developers to design and integrate efficient APIs for real-time data
fetching and processing.
Implemented PDF generation using the react-pdf/renderer library for exporting data in both banking
and medical projects.
Contributed to CI/CD processes, ensuring smooth deployments and quick iterations using Docker.
Built reusable components and optimized front-end architecture for scalability and maintainability.
Integrated decision-making algorithms in the banking project for personalized product
recommendations and in the medical project for suggesting medicine alternatives based on user
needs.

Stack: TypeScript, React, Redux, Redux-Saga, Jest, react-pdf/renderer, React Query, Styled Components,
Ant Design, Husky, Prettier, ESLint, create-react-app, Docker.

Frontend Engineer (08/2020 to 07/2023)
SoftServe - Dnipro, Ukraine

Contributed to the development of major B2C and B2E applications as part of a large international team,
including members from the Middle East and Europe. Mentored junior and mid-level developers and led
key aspects of project development.

Played a key role in developing Next.js and React-based applications for Qatar National Banking and
Sohar National Banking, focusing on creating dynamic user interfaces, integrating databases, and
optimizing performance for retail banking solutions.
Worked on a low-code platform using VOLTMX Iris to build a tablet application for AB-Inbev, focusing
on features for factory control, including data visualization and graphing.
Mentored junior and mid-level developers by providing technical guidance, code reviews, and career
development support.
Collaborated with an international team to adapt to diverse project requirements and tackle complex
challenges effectively.
Designed and implemented scalable front-end architectures and components, ensuring
maintainability and high performance.
Actively participated in agile development processes, including sprint planning, retrospectives, and
daily stand-ups, to ensure timely delivery and high-quality outcomes.
Focused on application performance optimization, implementing best practices and techniques to
enhance user experience and efficiency.

Stack: TypeScript, JavaScript, React, Next.js, Redux, Redux Toolkit, Jest, SCSS, Tailwind, Bootstrap, next-
i18next, Create React App, @apollo/client

Frontend Engineer (01/2020 to 07/2020)

Ti b D i Uk i
Timeweb - Dnipro, Ukraine

Contributed to the development of a site-builder tool for a hosting provider. Worked as a middle frontend
developer, focusing on building and improving components, and handling various frontend tasks to
enhance the site's functionality and user experience.

Designed and implemented reusable components to streamline the site-building process, improving
overall efficiency and code maintainability.
Added new features and functionalities based on user feedback and project requirements, enhancing
the tool's usability and performance.
Worked closely with backend developers to integrate APIs and ensure seamless data flow between
frontend and backend systems.
Identified and resolved bugs, optimized performance, and ensured cross-browser compatibility for a
smooth user experience.
Created and maintained documentation for the site-builder tool, providing guidance for future
development and maintenance.

Stack: Vue.js 2, JavaScript, SCSS, Vuex, Axios, Lodash

Junior Frontend Engineer (09/2018 to 01/2020)
Softserve - Dnipro, Ukraine

Contributed to the development of applications that connect multiple databases and streamline
processes. Worked on two projects: one using Aurelia to integrate two databases into a single frontend, and
another low-code platform project using pure JavaScript.

Participated in code reviews and provided feedback to improve code quality.
Assisted in troubleshooting and debugging issues to ensure smooth deployment.
Collaborated with UX/UI designers to implement user-friendly interfaces.
Engaged in continuous learning to stay updated with emerging technologies and best practices.

Stack: Aurelia, JavaScript, HTML, CSS, Aurelia-CLI, Aurelia-Dependency-Injection

Junior Frontend Engineer (02/2017 to 08/2018)

Itop.media - Dnipro, Ukraine

Worked as a frontend developer at a web studio, specializing in creating landing pages, online shops, and
other web solutions. Utilized various CMS platforms to deliver high-quality, functional websites for clients.

Developed custom landing pages and e-commerce sites tailored to client specifications, focusing on
responsive design and user experience.
Worked with popular CMS platforms like WordPress, OpenCart, and others to build and maintain
websites, ensuring they met industry standards and client needs.
Customized themes and plugins to extend CMS functionality, providing clients with unique features
and optimized performance.
 Performed regular maintenance and updates to existing websites, addressing issues, and
implementing new features as required.

Stack: WordPress, OpenCart, JavaScript, HTML5, CSS3, jQuery

SKILLS

Front-End Development (9 years) Tailwind.css (3 years)
JavaScript (9 years) Material UI (3 years)
TypeScript (4 years) Styled components (3 years)
React (6 years) Apollo GraphQL (2 years)
Redux (6 years) CSS (9 years)
Node.js (3 years) Git (9 years)
Express.js (3 years) HTML5 (9 years)
MongoDB (3 years) Next.js (3 years)
Unit Testing (5 years) Wordpress (5 years)

EDUCATION
Bachelor's in Computer Science (06/2018)
National Metallurgical Academy of Ukraine

LANGUAGES
English: B2

Russian/Ukrainian: Native