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Hongbae KimHK

Hongbae Kim

Custom Website Automation

€300/day
Berlin, DE
0-2 years

Average response time: 1 hour

About Hongbae

I'm a freelance web developer based in Berlin with hands-on experience building automation systems and backend tools for websites. I’ve completed multiple projects involving payment-based updates, email automation, API integrations, and server deployment.

I’m confident I can contribute to your team, especially with tasks like migrating payment systems, integrating APIs, and building business dashboards. My background includes working independently, managing servers (Docker, Nginx), and setting up backend solutions that streamline operations and enhance user experience.

I’d be excited to bring my skills to your team and help deliver efficient, scalable solutions.
  • English

    Fluent

  • Korean

    Native or bilingual

  • Chinese

    Conversational

Can work on-site
Berlin (up to 50km)

Experience

  • Invoicingu
    full-stack developer
    DIGITAL AND IT
    September 2025 - Today (9 months)
    Berlin, Germany
    I founded InvoicingU, a startup making invoicing simple for freelancers and small businesses in Germany.
    I design, build, and manage the entire platform — from front-end (React/TypeScript) to back-end (Node/Express, PostgreSQL, Docker, Nginx).

    My role spans:

    🚀 Product development – coding new features, maintaining a full Dockerized stack, ensuring German tax/VAT compliance.

    🛠 Problem solving – fixing errors, implementing customer requests, and improving performance.

    👥 Customer engagement – meeting freelancers, gathering feedback, and turning it into updates that make invoicing easier.

    📈 Startup building – managing everything from infrastructure to design, while shaping the vision of InvoicingU.

    I’m passionate about building tools that remove complexity and give freelancers more time to focus on their work.
    React.js JavaScript Typescript Docker Node.js
  • Hongpage
    full-stack developer
    DIGITAL AND IT
    November 2024 - March 2025 (4 months)
    Berlin, Germany
    React, Vite, TypeScript, PostgreSQL, pg_cron, Docker, Nginx
    Built a full-stack web platform that connects
    guests and hosts to offer and search
    accommodations. https://hongpage.com

    1. Developed user login/authentication and
    dynamic listing system.
    2. Integrated real review system where
    users can leave uneditable reviews after
    confirmed stays.
    3. Designed and implemented a points
    system for posting listings and
    purchasing premium features.
    4. Deployed using Docker and Nginx on a
    production server with PostgreSQL as
    the backend database.

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Education

  • 42 Berlin Coding School
    2025
  • Double Major in Mechanical Engineering and Business Administration.
    Korea Mokpo University
    2017
    Double Major in Mechanical Engineering and Business Administration.

Skill set

Categories