Ігор

Igor Marynich

Senior React Native Developer
Ukraine | [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація»)

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