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Hamed Haddadi EsfahaniHH

Hamed Haddadi Esfahani

Senior JavaScript Developer —React · Next. Node.js

€444/day
Munich, DE
8-15 years

Average response time: 1 hour

About Hamed

I'm Hamed, a full-stack JavaScript developer with 10+ years of experience — and if you're reading this, you probably need one of three things: a slow website fixed before it costs you more conversions, a product idea shipped fast, or a codebase cleaned up so your team can move again. That's exactly what I do.

Why clients work with me:
  • Measurable results — load times cut by 50–70 % is a typical outcome of my performance work
  • Speed — small fixes in 24–48 h, MVPs in 2–4 weeks
  • Code your next developer will thank you for — clean, documented, maintainable
  • I care about business outcomes (conversion, speed, SEO), not just code
Where I create impact for your business:
  • Next.js & React Development — modern, SEO-friendly web apps (App Router, TypeScript, Tailwind), from MVP to production
  • Performance Optimization — Core Web Vitals, Lighthouse scores, bundle size reduction for websites that feel instant
  • Headless E-Commerce (Shopify) — custom storefronts with Next.js/Hydrogen on Shopify's Storefront API; faster stores convert better
  • Node.js Backends & APIs — REST/GraphQL, serverless functions, integrations with Stripe, CRMs and more
  • AI Integrations — OpenAI/Claude-powered features in your existing React app: chatbots, content generation, smart search
How we start:
Send me a short message describing your project. Within a few hours you'll get my clarifying questions and a realistic estimate — no vague promises. Urgent bug fix? Write "URGENT" and I'll prioritize it.
Let's build something fast.
  • English

    Native or bilingual

  • German

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Freelancer
    Freelance Full-Stack JavaScript Developer
    DIGITAL AND IT
    November 2025 - Today (8 months)
    Munich, Germany
    Custom Web Platform & Workflow Automation (Next.js, TypeScript, Node.js):

    • Built a custom business web application with Next.js, TypeScript and Node.js — from architecture to production deployment
    • Developed a data dashboard centralizing business and customer data with real-time filtering, search and reporting
    • Implemented automated workflows and triggered email campaigns via Node.js services and third-party API integrations (email, payment, analytics)
    • Owned the full delivery cycle solo: requirements, architecture, implementation, deployment and iteration based on user feedback
    Next.js Node.js React.js Typescript REST API
  • Vispiron
    Senior JavaScript Developer & Technical Lead
    DIGITAL AND IT
    May 2023 - October 2025 (2 years and 5 months)
    Munich, Germany
    AI-Powered Automation Platform (React, Node.js, OpenAI):

    • Led the end-to-end development of an AI-powered web platform automating customer communication and internal workflows
    • Built AI chatbots and agents (OpenAI integration) handling support requests, follow-ups and content generation in production
    • Developed the React frontend and Node.js backend services, including REST APIs and event-driven automation workflows
    • Integrated multiple internal tools and third-party services into one unified system — replacing manual processes with automated pipelines
    • Coordinated a cross-functional team and translated business requirements into shippable technical solutions
    Chatbot Development Workflow Automation OpenAI AI Agents REST APIs
  • EVO GmbH
    Software Development Engineer
    DIGITAL AND IT
    January 2021 - April 2023 (2 years and 3 months)
    Munich, Germany
    Web Application Development & Process Automation (JavaScript, Node.js):

    • Developed internal web applications for managing business and customer data, structured around clean, maintainable JavaScript
    • Built automated workflows connecting marketing and sales tools through custom API integrations
    • Implemented behavior-triggered email campaigns based on user actions and lifecycle events
    • Streamlined previously manual processes into one automated end-to-end workflow, cutting turnaround times for the team
    JavaScript Marketing Automation Web development Web API Email marketing

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Education

  • Diplom. Ing.
    technische Universität Dresden
    2021
    * Diploma in Engineering (Dipl.-Ing.), TU Dresden — a rigorous 5-year program equivalent to a Master's degree * Strong foundation in mathematics, systems design and analytical problem-solving * This engineering mindset is why my code is structured, maintainable and built to last

Skill set

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