Денис

Denys Tabachuk
React Native / Frontend Developer
Rivne, Ukraine | [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація»)
@DenTaba4 (Telegram) | [відкрити контакти](див. вище в блоці «контактна інформація»)

About Me
Frontend and React Native developer with commercial experience
building and maintaining production fintech mobile applications.
Hands-on experience with complex application flows, reusable UI, and
production codebases.

Technical Skills
Core
● TypeScript, JavaScript
● React Native, React, Expo
● HTML, CSS,
● Redux Toolkit, TanStack Query
● React Router, React Navigation
● Jest, React Native Testing Library
● REST APIs
● Git
Additional / Familiar with
● Next.js
● NestJS
● GraphQL
● SQL

Experience
Frontend Developer | TenThousand | April 2025 – September 2026 (1 yr 6 mos)
International Fintech Product
Worked on a large international fintech platform providing savings and investment products across
European, UK, and US markets. Due to NDA restrictions, the client name cannot be disclosed.
● Developed and modernized customer-facing functionality in a large Nx monorepo with multiple mobile
applications using React Native, TypeScript, Redux Toolkit, TanStack Query, React Navigation,
Storybook, REST APIs, Git, etc.
● Migrated existing WebView-based flows to native React Native implementations.
● Worked on complex registration flows for different account types and user roles using React Hook
Form, Yup, React Navigation, and backend APIs.
● Built and maintained transaction and money-movement flows, including withdrawals and related
financial operations.
● Nativeized and maintained reference account management, including account status handling,
document updates, and related customer journeys.

● Worked on UK savings-account functionality, including registration, funding, and withdrawal flows.
● Integrated new mobile flows with existing platform infrastructure such as Universal Links, Strong
Customer Authentication, Friendly Captcha, Snowplow analytics events, and LaunchDarkly feature
flags.
● Regularly compared web and mobile implementations to keep business logic, naming, validation, and
user journeys consistent across platforms and reduce unnecessary differences between the web and
mobile codebases.
● Collaborated closely with backend developers, web developers, designers, and product managers to
align implementation with acceptance criteria and resolve inconsistencies between APIs, designs,
web, and mobile behavior.
● Delivered 150+ merge requests during roughly 1.5 years, covering new features, native migrations,
improvements, and fixes.

Education
Bachelor of Software Engineering (2022-2026)
National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"
Faculty of Informatics and Computer Engineering (FICE)
Department of Informatics and Software Engineering (IPI)
The program provided a rigorous and multidisciplinary foundation in software engineering, combining
theoretical depth with extensive practical work across a broad range of areas. It covered frontend
and backend development, low-level and systems programming, embedded systems, data analysis,
machine learning, information security, parallel and distributed computing, system modeling, and
low-code development.
The curriculum was technically intensive and also included higher mathematics, software
architecture and engineering practices, as well as teamwork, communication, and collaborative
software development.

Languages
Ukrainian (Native)
English (B1+)