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Denys Markin

@denysmarkin

Frontend and React Native engineer, 4+ years of React and TypeScript. Led a B2B portal from the first commit. Remote, available now.

Ukraine

Message

What I'm looking for

A remote frontend or React Native role on a product people use every day, where I can see the result of my work. I enjoy owning features end to end and digging into performance, and I’d like a team that takes AI tooling seriously. Full-time or long-term contract. I work B2B through my sole proprietorship. Time zone: Kyiv, happy to overlap with US hours.

I’m a frontend engineer with over four years of React, React Native and TypeScript. From March 2022 to June 2026 I worked at Farmable, an agritech SaaS, on a React Native (Expo) app and two React web apps.

I led development of a B2B portal for partners and distributors from the first commit, so the architecture and library choices were mine. It has field and farm maps, a job planner, product and treatment libraries, enterprise permissions and reports, and it works in several languages and unit systems.

Performance is the part I enjoy most. I cut a heavy map screen’s React render from 68 ms to 5 ms and a dashboard’s GraphQL response from 1.76 MB to 14 KB. I also moved a large production app from Webpack to Vite and from React 17 to 19, and the production build went from 29 to 9 seconds.

I use Claude Code every day and review everything it writes. I built a Claude Code plugin for the team’s translation workflow. With two friends I shipped an Expo app to the App Store, where I owned the whole mobile app and its Firebase backend.

I’m looking for a remote frontend or React Native role on a product where I can see the result of my work. I work as a sole proprietor and can start right away.

Experience

Work history, roles, and key accomplishments

Frontend Engineer (React / React Native)

Farmable AS

Mar 2022 - Jun 2026 (4 years 3 months)

I worked on a React Native (Expo) app and two React web apps. I led development of the B2B partner portal from the first commit, so the architecture and library choices were mine. I moved a large web app from Webpack to Vite and React 17 to 19 (build went from 29s to 9s). Cut a map screen's render from 68 ms to 5 ms and a dashboard's GraphQL payload from 1.76 MB to 14 KB. Owned i18n.

Project Manager

Construction & Real Estate Development

Jan 2014 - Dec 2021 (7 years 11 months)

Managed multi-stage residential and commercial projects, including contractor tenders, quality control, budgets, and coordination across design, sales, and investor stakeholders.

Project Management Contractor Tenders Quality Control Budgeting Stakeholder Coordination