Open to opportunities

Joel Zaky

@joelzaky

Senior full-stack engineer building Next.js web apps and mobile experiences, plus document-grounded AI with RAG and LLM APIs.

Netherlands

Message

What I'm looking for

I’m looking to keep building production web and mobile products—especially AI features with LLMs and RAG—while owning architecture, performance, and reliable delivery from development through CI/CD.

I build and ship production web and mobile applications, most recently leading architecture, development, and deployment at RefreshCode with Next.js, React, TypeScript, and Node.js.

I’ve also built cross-platform mobile experiences with React Native and Expo, including CI/CD pipelines and OTA updates to streamline releases for iOS and Android from a shared codebase.

On the AI side, I develop prompt engineering, streaming responses, and tool calling with OpenAI and Claude APIs, and I’ve engineered RAG systems in Python with Ollama—using embeddings and vector search to improve document-grounded answers.

Earlier, at Altitude and Studio Bureau, I maintained scalable web applications, delivered REST APIs, and improved delivery time and performance through code optimization and reusable component architecture.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

RefreshCode

Aug 2023 - Apr 2025 (1 year 8 months)

Led architecture, development, and deployment of production-grade web applications using Next.js, React, TypeScript, and Node.js. Built AI-powered features with OpenAI and Claude APIs, and engineered a RAG system that improved answer accuracy by 25%.

Next.js React TypeScript Node OpenAI API Claude Prompt Engineering Streaming Responses Tool calling React Native Expo Python Ollama Embeddings Vector Search RAG CI CD OTA Updates

Full-Stack Developer

Altitude

Aug 2021 - Jun 2023 (1 year 10 months)

Enhanced and maintained scalable web applications using React.js, Next.js, Node.js, and TypeScript. Designed RESTful APIs and collaborated with cross-functional teams to ship customer-focused features, reducing delivery time by 20%.

React Next.js Node TypeScript REST APIs Code Review Performance Optimization

Frontend Developer

Studio Bureau

Sep 2019 - May 2021 (1 year 8 months)

Built responsive, interactive user interfaces using React, JavaScript, and TypeScript. Developed reusable UI components and integrated APIs to improve application performance.

React JavaScript TypeScript CSS SCSS CSS in JS API Integration