Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I’m a senior full stack developer with a frontend-leaning profile who has built production web and mobile applications across Romania and Europe. I focus on React, React Native, and TypeScript, with hands-on backend work in PHP/Laravel, C#/.NET, Python, and Node.js. Recently I’ve integrated OpenAI and Anthropic Claude APIs into React/React Native apps and regularly use AI coding tools like Cursor, Claude Code, and GitHub Copilot to accelerate development. I enjoy owning end-to-end features—from UI to API to data—across distributed product teams. I thrive in environments that value performance, offline behavior, and thoughtful UX, and I’m comfortable collaborating with backend teams on API design, observability, and gradual feature rollouts.…I’m a senior full stack developer with a frontend-leaning profile who has built production web and mobile applications across Romania and Europe. I focus on React, React Native, and TypeScript, with hands-on backend work in PHP/Laravel, C#/.NET, Python, and Node.js. Recently I’ve integrated OpenAI and Anthropic Claude APIs into React/React Native apps and regularly use AI coding tools like Cursor, Claude Code, and GitHub Copilot to accelerate development. I enjoy owning end-to-end features—from UI to API to data—across distributed product teams. I thrive in environments that value performance, offline behavior, and thoughtful UX, and I’m comfortable collaborating with backend teams on API design, observability, and gradual feature rollouts.

Cristina Rotaru

Full Stack Developer, Web Developer, Back-End Developer, +2





I’m a senior full stack developer with a frontend-leaning profile who has built production web and mobile applications across Romania and Europe. I focus on React, React Native, and TypeScript, with hands-on backend work in PHP/Laravel, C#/.NET, Python, and Node.js. Recently I’ve integrated OpenAI and Anthropic Claude APIs into React/React Native apps and regularly use AI coding tools like Cursor, Claude Code, and GitHub Copilot to accelerate development. I enjoy owning end-to-end features—from UI to API to data—across distributed product teams. I thrive in environments that value performance, offline behavior, and thoughtful UX, and I’m comfortable collaborating with backend teams on API design, observability, and gradual feature rollouts.…I’m a senior full stack developer with a frontend-leaning profile who has built production web and mobile applications across Romania and Europe. I focus on React, React Native, and TypeScript, with hands-on backend work in PHP/Laravel, C#/.NET, Python, and Node.js. Recently I’ve integrated OpenAI and Anthropic Claude APIs into React/React Native apps and regularly use AI coding tools like Cursor, Claude Code, and GitHub Copilot to accelerate development. I enjoy owning end-to-end features—from UI to API to data—across distributed product teams. I thrive in environments that value performance, offline behavior, and thoughtful UX, and I’m comfortable collaborating with backend teams on API design, observability, and gradual feature rollouts.

Available to hire

I’m a senior full stack developer with a frontend-leaning profile who has built production web and mobile applications across Romania and Europe. I focus on React, React Native, and TypeScript, with hands-on backend work in PHP/Laravel, C#/.NET, Python, and Node.js. Recently I’ve integrated OpenAI and Anthropic Claude APIs into React/React Native apps and regularly use AI coding tools like Cursor, Claude Code, and GitHub Copilot to accelerate development.

I enjoy owning end-to-end features—from UI to API to data—across distributed product teams. I thrive in environments that value performance, offline behavior, and thoughtful UX, and I’m comfortable collaborating with backend teams on API design, observability, and gradual feature rollouts.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Romanian, Moldavian, Moldovan

Fluent

English

Fluent

Work Experience

Senior Full Stack Developer at Bolt

May 1, 2024 - Present

Work on Bolt's consumer platform across React / React Native frontends and adjacent Python (FastAPI) and Node.js services. Contribute to the shared component strategy across Next.js (App Router) and React Native using TypeScript, monorepo tooling, and GraphQL contracts. Ship rider-facing features end-to-end — UI, GraphQL/REST endpoints, and data shape — with a focus on offline behavior, deep linking, and performance budgets. Built frontend features for an AI-based project: chat and assistant screens in React Native and Next.js, integrating OpenAI and Anthropic Claude APIs with streaming responses, message history, and error/retry handling. Built and extended Python (FastAPI) gateway services for the AI features — auth, token usage tracking, prompt parameter handling, and response post-processing. Use Cursor, Claude Code, and GitHub Copilot daily for code generation, refactors, and PR review, and helped the team adopt these tools into the standard workflow. Collaborate with Python

Senior Full Stack Developer at Pleo

November 1, 2022 - April 1, 2024

Joined the mobile platform team building Pleo's React Native expense management app; shipped end-to-end mobile features (card management, receipt capture, reimbursements); built and maintained Node.js/NestJS backend-for-frontend services tailored for the mobile clients, and contributed C# code to internal .NET 6/7 microservices on smaller cross-team tickets. Improved cold start time and screen transitions through Hermes adoption, native module profiling, and Flipper-driven render audits. Hardened mobile CI on Bitrise and Fastlane, automating release lanes for iOS App Store and Google Play and reducing release-day manual work for the team.

Senior Frontend Developer at Bitdefender

April 1, 2020 - October 1, 2022

Led frontend work on consumer-facing security and account management products with React 17, TypeScript, and Next.js for SSR-heavy pages. Owned the React Native mobile app for a parental control product, shipping new feature flows, redesigned navigation, and performance improvements across iOS and Android. Built and maintained a reusable UI component library in Storybook, used across multiple surfaces. Drove web performance work (Core Web Vitals, bundle splitting, lazy loading, image optimization) and contributed to shared design-system efforts and testing culture (TypeScript strict mode, Jest, React Testing Library).

Software Developer at Pentalog

November 1, 2017 - March 1, 2020

Delivered full-stack web and mobile features for European clients using React, Vue 2, and Angular on the frontend, with Laravel, .NET Core 2.x, and Django-based APIs on the backend. Built and shipped two cross-platform mobile apps with React Native, integrating push notifications, deep linking, and native modules. Designed and built REST APIs and OAuth2 authentication flows (Stripe integration) for SaaS products serving thousands of users.

Junior Web Developer at Endava

August 1, 2014 - July 1, 2017

Built client-facing web applications using PHP/Laravel on the backend and a mix of jQuery, AngularJS, and early React on the frontend. Implemented responsive UI components and forms, supported tablet/mobile breakpoints, developed REST endpoints and MySQL data access for B2B portals in banking and telecom projects. Contributed to code reviews, pair programming, and ongoing knowledge sharing.