Cezar Cobuz

Background

About Cezar Cobuz

I am a Senior React Native Developer, Contractor, Freelancer with +, specialising in taking mobile products from zero to launch — and beyond.I've helped multiple startups build their v1/MVP and use it to secure first funding rounds — £2.4M and £1M in crowdfunding, first £3M in assets managed on a fintech platform, and first users onboarded across social media, fintech, fitness, e-learning and IoT. I've worked as a founding engineer, and I take full ownership — from translating rough ideas into specs and user stories, to building the architecture, shipping to the stores, setting up observability, and iterating based on real user behaviour.I ship fast with AI-assisted development (Claude Code, Cursor, Codex) and know when to cut scope, timebox, and propose a simpler path to validate first.About my skills: Mobile & Frontend• React Native, Expo (SDK, Router, EAS)• Typescript, Javascript• TanStack Query, Apollo GraphQL, Zustand, MMKV, Redux, MobX • Storybook, i18next, D3.js, ECharts, Reanimated• React.js Quality & Testing• Jest, React Testing Library• Maestro (E2E), Sentry, SonarCloud Backend & APIs• ConnectRPC / Protobuf, gRPC, REST• Node.js, Express• PostgreSQL, MongoDB• Firebase Delivery & CI/CD• Git, GitHub Actions, Dependabot, Snyk• EAS Build & Submit, Bitrise, Fastlane, CircleCI• App Store Connect, Google Play Console Architecture & Principles• Clean Architecture, Design Patterns• Multi-environment builds, Offline-first• Multi-brand/white-label apps from a shared codebase Design• Figma AI-Augmented WorkflowClaude Code, Cursor, Codex Remote-first, open to occasional on-site.🤝 if you think my expertise could help your organisation! E-mail: contact@cobuz.dev Phone:+40 746 140 100