Larbi S.

• Improved application security, performance, and maintainability by refactoring middleware logic, optimizing builds, and resolving dependency issues.
• Developed AI-powered chat functionality using CopilotKit and later migrated parts of the implementation to the Vercel AI SDK.
• Implemented RAG-based workflows with embeddings, knowledge base integrations, and AI agent tooling to support intelligent search and content generation flows.
• Built and enhanced frontend and backend functionality for AI-driven workflows, including chat interactions, activity tracking, streaming updates, and asynchronous task handling.
• Added production-focused improvements such as rate limiting, Redis-based caching, retry handling, circuit breakers, logging improvements, and API performance optimizations.

Technologies:
TypeScript, React, Next.js, CopilotKit, Vercel AI SDK, Supabase, Docker, Trigger.dev, Redis, RAG, Embeddings, Resend, React Email, REST APIs, Git.

• Built and launched a resume builder with a block-based editor, drag-and-drop layout, and branching/versioning with undo/redo.
• Implemented CQRS and event sourcing with an append-only event log, snapshotting for fast loads, and read-model projections for queries and analytics.
• Designed reliable autosave and sync using an outbox pattern, ensuring idempotent event writes, retry-safe delivery, and offline-friendly flow.
• Optimized large-document rendering with normalized state, per-entity selectors, and targeted updates to minimize re-renders.
• Deployed the application on Vercel with CI/CD and production infrastructure for authentication, Postgres storage, and monitoring/telemetry.

• Met technical assessment criteria by demonstrating strong proficiency in React, Next.js, and TypeScript.
• Engaged with clients on the Proxify Talent Network to deliver web applications using React, Next.js, and TypeScript.
• Applied clean architecture principles in frontend development, ensuring separation of concerns and scalability across client projects with React, Next.js, and Tailwind CSS.
• Developed reusable UI components and optimized data flow by leveraging TypeScript and modern React design patterns to ensure maintainability and performance.

• Developed and implemented new features for a React-based ticket marketplace website.
• Integrated backend services for CMS and APIs with the React frontend in collaboration with cross-functional teams.
• Monitored site performance and resolved issues to enhance user experience and service reliability.
• Ensured compliance with security, SEO, and accessibility best practices.
• Provided ongoing technical support and troubleshooting for the service.
• Improved Core Web Vitals, reducing Time to Interactive (TTI) from 6s to under 2.5s.
• Integrated the React frontend with a custom CMS and REST APIs to support daily traffic exceeding 10K users.
• Implemented caching and error boundary strategies that reduced frontend errors by 30%.
• Ensured WCAG accessibility compliance and increased Lighthouse performance scores to 95+.

• Developed a modern React-based frontend application (ScandiPWA) for clients including Monin, Puma, Medisave, and Olivers as part of a global development team.
• Contributed to fullstack feature implementation, release planning, and delivery for eCommerce platforms.
• Collaborated cross-functionally to deliver high-performance, scalable components using TypeScript and GraphQL.
• Applied best practices for testing, version control, and CI/CD in a fast-paced, product-focused environment.

• Delivered high-performance web applications for 4+ international clients in eCommerce, SaaS, and content publishing sectors;

• Designed reusable React component libraries to streamline development across multiple engagements;

• Integrated REST and GraphQL APIs, improving data fetching speed by an average of 40%;

• Implemented performance optimization techniques such as lazy loading and dynamic imports, achieving a 30–60% reduction in page load times;

• Collaborated with designers and stakeholders using Figma and Jira to ensure pixel-perfect, responsive user interfaces;

• Built admin dashboards and CMS tools with React and Next.js to support scalable content management workflows;

• Conducted code audits and refactoring to maintain best practices, accessibility (WCAG), and long-term maintainability;

• Deployed applications using Vercel, Netlify, and AWS Amplify, and managed CI/CD pipelines with GitHub Actions.

• Built a fullstack quiz practice service enabling developers to assess and improve their technical skills;

• Developed and deployed scalable infrastructure using Express.js, PostgreSQL, Redis, and Docker;

• Implemented a responsive and intuitive UI with React.js, Next.js, and styled-components;

• Managed deployment with Nginx on DigitalOcean, optimizing performance and applying security best practices.