Ігор

Igor Marynich

Senior React Native Developer
Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

Education
M.Sc. in Radiophysics and Computer Systems
V. N. Karazin Kharkiv National University
Bachelor’s Degree – 2012 | Master’s Degree – 2013

Technical Skills

●​ JavaScript (ES6+) & TypeScript ●​ REST APIs (pagination, filtering,
7+ years complex data flows)
●​ React (Hooks, Context) ●​ Third-party & high-load
●​ React Native integrations
●​ Next.js (SSR, SSG, ISR, App & ●​ Firebase (Auth, Firestore, Cloud
Pages Router) Functions)
●​ Redux, Redux-Saga, React Query ●​ Git, code reviews, CI/CD
●​ Design Systems & reusable ●​ Testing (unit, component, e2e)
component libraries ●​ Monitoring & error tracking

Work Experience

Contract Projects
SoftServe (Sep 2025 – Jan 2026)
React Native Developer
Responsibilities:
-​ Worked on a large-scale enterprise mobile application within the S&P Global
ecosystem, focused on secure data presentation and user interaction for internal and
external stakeholders.
-​ Developed reusable, scalable UI components with strong emphasis on data integrity,
performance, and compliance with enterprise security standards.
Tech Stack: React Native, Redux, Firebase, React Navigation

Empeek (Jan 2025 – Sep 2025)
Senior React Native Developer / React Developer
Responsibilities:
-​ Contributed to a medical application focused on patient tracking
 -​ Built reusable UI components and ensured HIPAA-compliant data handling
-​ Collaborated with backend and QA to deliver core features under tight deadlines
Tech Stack: React Native, Redux, Firebase, React Navigation, Next.js

Zazmic (Aug 2024 – Dec 2024)
Senior React Native Developer
Responsibilities:
-​ Developed a CRM system using React Native
-​ Managed state with Redux, handled complex UI flows
-​ Integrated backend APIs and ensured smooth cross-platform behavior
Tech Stack: React Native, Redux, TypeScript, Axios

Platma (Aug 2023 – Aug 2024)
Senior React Native Developer
Project – AI-Powered Financial Platform (USA)
Responsibilities:
-​ Leading app architecture, code quality, native module integration (iOS/Android)
-​ Mentoring developers, coordinating with product, design, and backend teams
-​ Participating in strategic decision-making and feature planning
-​ Designed and implemented scalable React Native architecture
-​ Integrated Firebase, localization, secure keychain, permissions
-​ Collaborated across teams and communicated directly with stakeholders
Tech Stack: React Native, Redux, Redux-Saga, Firebase, axios, i18next, keychain

N-iX (Aug 2021 – Jan 2023)
Senior React Native Developer
Project – Financial Platform (UK)
Responsibilities:
-​ Designed scalable mobile architecture
-​ Conducted code reviews and mentored mid/junior developers
-​ Supported Open Banking APIs, loans, and cards
-​ Built dynamic UI, integrated backend, and implemented data caching
Tech Stack: React Native, React Query, Firebase, Redux

Project – Energy Service Platform (UK)
-​ Created navigation, UI components, and backend integrations
-​ Fixed legacy issues and improved UX
Tech Stack: React Native, Redux, TypeScript

Shark Software (Aug 2020 – Aug 2021)
Tech Lead React Native Developer
Responsibilities:
-​ Defined technical vision, owned project delivery
-​ Conducted hiring, onboarding, and architecture reviews
-​ Developed high-performance agricultural management app
-​ Set up navigation, state management, and custom UI components
Tech stack: React Native, Redux, React Query, TypeScript

ProCoders (Sep 2019 – Aug 2020)
React Native Developer
Projects:
-​ Broadcast App (USA) – 6 months
-​ RoseRiver (USA) – 4 months
-​ The Best Place (USA) – 5 months
Responsibilities:
-​ Built cross-platform apps with React Native
-​ Wrote maintainable code, handled backend integrations
-​ Developed internal tools and mobile applications
-​ Maintained UI consistency, wrote tests and documentation

Dev-Optima (Jun 2017 – Apr 2018)
React / React Native Developer
Projects:
-​ MicroLoans App (USA) – 4 months
-​ NDA Project (South Korea) – 5 months
Responsibilities:
-​ Delivered mobile & web apps in fast-paced startup team
-​ Closely collaborated with design and backend