Володимир

Volodymyr Osnadchuk
Senior Frontend Developer
📍 Kyiv / Zhytomyr, Ukraine
📞 [відкрити контакти](див. вище в блоці «контактна інформація»)
✉ [відкрити контакти](див. вище в блоці «контактна інформація»)
🔗 github.com/osnadchuk-v
SUMMARY

Frontend Developer with 10+ years across FinTech, Betting, and Enterprise SaaS. Last 4 years on CreditFlow — a
financial analytics platform for US Debt Capital Markets with 150+ institutional clients. Before that: high-traffic sports
betting (Favbet), cross-platform apps (React Native, Angular), and enterprise web platforms with REST API integrations.
Specialises in TypeScript/React, real-time data (WebSocket), complex forms, legacy migrations, and automated testing
(Playwright, Jest, Vitest, GitHub Actions CI). End-to-end feature ownership; regular business demos; SAFe Agile.

EXPERIENCE
Senior Frontend Developer · Finsight — Kyiv
February 2022 – July 2026
● Built real-time data tables with SSR rendering and WebSocket subscriptions for a financial data and analytics
platform used by institutional investors and investment banks.
● Engineered key user-facing analytical features for the CreditFlow platform: Bond Screener, League Tables, Portfolio
Monitor, New Issue Volume charts, interactive dashboards.
● Drove three platform-wide migrations: JavaScript → TypeScript, Redux Form → Final Form, Redux → React Context.
● Built Playwright E2E tests + Jest/Vitest unit tests integrated into GitHub Actions CI.
● Performed mandatory code reviews within a 10-person squad; owned features from spec to production.
● Presented sprint deliverables to business stakeholders 3+ times per PI; monitored Sentry errors daily.
● Worked in SAFe Agile (2-week sprints, PI planning, backlog refinement, retros).
Frontend Developer · Betinvest — Kyiv
February 2020 – February 2022
● Developed new features and maintained core React applications for a high-traffic sports betting platform (Favbet).
● Implemented state-driven components, custom React Hooks, React Hook Form, design system libraries.
Frontend Developer · Softwarium — Kyiv
April 2019 – February 2020
● Built interactive React applications for childcare and school facility management (Vigilo).
● Used Redux, Formik, React-intl for localization.
Junior Frontend Developer · OldminTeam — Zhytomyr
May 2018 – April 2019
● Cross-platform web and mobile applications with Angular 2+, React.js, React Native.
Junior Frontend Developer · JBS Ukraine — Zhytomyr
May 2016 – May 2018
● Responsive layouts, corporate web platforms, third-party REST API integrations.

TECHNICAL SKILLS
Languages: JavaScript (ES6+), TypeScript, HTML5, CSS3
Frameworks & Libs: React, Next.js, Angular (2+), React Native, Redux, React Context
Forms & Validation: Final Form, React Hook Form, Formik, Redux Form, TanStack Query
Styling & UI: Sass, Styled Components, CSS Modules, UIKit, Material UI, Design Systems, Tailwind CSS
Testing: Playwright, Jest, Vitest
Tools: Git, Figma, Storybook, Sentry monitoring

ACHIEVEMENTS
● Transformed the free functionality of the application into a multi-level subscription, which allowed the company to
attract 150+ premium subscribers and increase monthly revenue from subscriptions.
● Built high-performance tables and complex data-entry forms for reliable real-time market data ingestion.
● Test suite from scratch: 50+ Playwright E2E + Jest/Vitest unit tests in GitHub Actions CI → continuous regression
detection on every PR.
● Optimized client-side components for the high-traffic Favbet platform under heavy load.
● Reusable component systems: Designed custom React Hooks and UI component libraries across multiple projects
(Betinvest, Softwarium) → reduced duplication and accelerated feature delivery.

PROJECTS
CreditFlow: https://creditflowresearch.com/ — Real-time analytics for US Debt Capital Markets
Finsight: https://finsight.com/ — Financial intelligence and market data platform
Favbet: https://favbet.com — High-scale sports betting platform
Vigilo: https://vigilo.no — School and childcare management software

CERTIFICATIONS
Next.js Fundamentals, v4 Course Completed — Issued Sep 2026
Master.dev (Formerly Frontend Masters)
React Performance, v2 Course Completed — Issued Jan 2026
Master.dev (Formerly Frontend Masters)

LANGUAGES & EDUCATION
Ukrainian: Native | English: Intermediate (B1/B2)
Specialist's Degree in Management of Organizations and Administration
National University of Food Technologies, Kyiv · 2011–2012