Денис

Denys Lahoda
Frontend Developer · React, TypeScript & Legacy Modernization
Kyiv, Ukraine · [open contact info](look above in the "contact info" section) · LinkedIn · GitHub · Telegram

Frontend developer with 5+ years of experience in React and TypeScript. I've built applications from
scratch, modernized legacy systems, and worked directly with clients in international teams. My work has
ranged from owning frontend development on new products to building complex data-driven interfaces
and maintaining established applications.

SKILLS
Languages: JavaScript, TypeScript, HTML5, CSS3
Frameworks & Libraries: React, Redux Toolkit, React Hook Form, Zod, Zustand, TanStack Query
Styling: Tailwind CSS, MUI, CSS Modules, Styled Components, Sass / SCSS
Build & Tools: Vite, Webpack, Git, Figma
AI: OpenAI Codex, AI-assisted development
Additional: REST APIs, jQuery (legacy), SQL (foundational), Linux CLI (basic)

EXPERIENCE
Echo, remote - Frontend Developer
Dec 2022 - Dec 2024

● Maintained and extended around a dozen production websites across a mix of jQuery, Vanilla JS,
React, and TypeScript codebases.
● Integrated React and TypeScript components into legacy applications without full rewrites.
● Replaced a jQuery-based multi-step form with a reusable React implementation, making it
easier to maintain and extend.

ITRex, remote - Frontend Developer
Nov 2021 - Nov 2022

● As the sole frontend developer in a five-person distributed team, designed and built a
private-equity marketplace MVP using React, TypeScript, and Redux Toolkit.
● Owned frontend architecture and delivered the initial release in approximately six months for
client demos.
● Built a multi-step registration flow to collect user data progressively and worked directly with
clients on requirements.

MoData, remote - Frontend Developer
Jul 2020 - Nov 2021

● Built a React analytics dashboard with complex editable data grids and real-time visualizations.
● Integrated React components into a legacy jQuery application, using the jQuery UI Widget Factory
to handle communication between the two.

Limestone Digital, Kyiv - Frontend Developer
Mar 2019 - Apr 2020

● Developed a React reporting tool with real-time filtering and CSV export, an admin panel, and the
initial frontend architecture for a marketplace portal.
● Worked with clients to translate requirements into frontend features and created user-flow
diagrams to support planning and estimation.

Languages: English: Upper-intermediate (B2); Ukrainian, Russian: Native
Education: Igor Sikorsky Kyiv Polytechnic Institute, Kyiv - BSc in Heat and Power Engineering
Additional Experience: Web Studio “Perspective”, Kyiv - Project / QA Coordinator, 2015 - 2017