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wikukarno/README.md

Hi 👋, I'm Wiku Karno

Software Engineer from Indonesia

🌐 Portfolio • 💼 LinkedIn • 📝 Blog • 📧 Contact

🚀 About Me

  • 🔧 Software Engineer with 4+ years building scalable B2B platforms and consumer apps serving 1.6M+ users
  • 🚀 Creator of budgetku.com and buanacoding.com
  • 💼 Open to remote opportunities — freelance or full-time

💼 Experience

  • 🧑‍💻 Software Engineer — PT. Nexus Teknologi Digital (Remote, July 2025 – Present)

    • Built and maintained a game top-up platform (1.6M+ users) — backend (Go/Gin), web (Next.js), mobile (Flutter)
    • Maintained a B2B H2H API service with RSA signature auth and sandbox mode for partner integrations
    • Integrated multiple payment gateways (Xendit, Midtrans, Duitku) and OAuth providers (Google, Apple, WhatsApp)
    • Resolved critical production issues including Samsung-specific token loss bug (6 root causes) and context propagation across 200+ DB queries
    • Managed CI/CD pipelines and 4 servers (production, staging, mitra) on DigitalOcean

  • 🧑‍💻 Software Engineer — PT. Tensai NS Teknologi Indonesia (June 2022 – June 2025)

    • Led a development team and mentored 5 interns on internal projects
    • Developed a client data management system using Laravel, replacing manual spreadsheet workflows with a centralized web platform
    • Reduced application load times by 40% through query optimization & caching
    • Resolved 100+ bugs during product development cycles

  • 🌐 Frontend Web Developer — PT. Ayo Menebar Kebaikan (Freelance, Aug 2024 – Sep 2024)

    • Translated Figma designs into responsive frontend using Bootstrap & Laravel Blade
    • Fixed and optimized payment gateway integration for donation transactions
    • Built CRM Kanban Board using Laravel & Livewire

  • 🏫 Fullstack Web Developer — University Islamic of Riau (Mar 2021 – Sep 2021)

    • Designed database schemas and developed internal information systems using Laravel
    • Handled maintenance & new feature development for internal applications

🛠️ Tech Stack

  • 💻 Languages: Go, PHP, JavaScript, TypeScript, Python
  • 🧰 Frameworks: Gin, Laravel, Next.js, Vue.js, Node.js, Flutter, TailwindCSS
  • 🗄️ Database: PostgreSQL, MySQL
  • ⚙️ Tools: Git, Docker, DigitalOcean, CI/CD, REST API, Figma

📌 Featured Projects

  • crowdfunding — Crowdfunding REST API in Go (Gin, GORM, PostgreSQL) with JWT auth, google/wire DI, Cloudflare R2 uploads, Midtrans payments, Swagger docs, and Docker.
  • jupyter-kesehatan — Exploratory analysis of patient vital-sign data with pandas and Plotly, from data cleaning to findings in a reproducible notebook.

💬 Open to remote roles, full-time or contract. Reach me on LinkedIn or at hi@wikukarno.dev.

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  1. crowdfunding crowdfunding Public

    Crowdfunding REST API in Go — Gin, GORM, PostgreSQL, JWT auth, UUID IDs, google/wire DI, Cloudflare R2 uploads, Midtrans payments, Swagger docs, and Docker.

    Go 1

  2. jupyter-kesehatan jupyter-kesehatan Public

    Exploratory analysis of patient vital-sign data (blood pressure, temperature, heart rate) with pandas and Plotly — cleaning, charts, and findings in a reproducible Jupyter notebook.

    Jupyter Notebook 2 1

  3. wareg_restaurant wareg_restaurant Public

    Modern restaurant landing site rebuilt with Astro 5, Tailwind v4, and TypeScript. Frontend-only portfolio piece — mock cart + auth via nanostores + localStorage.

    Astro

  4. crowdfunding-web crowdfunding-web Public

    Next.js (App Router) frontend for a Go crowdfunding REST API — server-first data flow, httpOnly-cookie auth, and Zod-validated forms and responses.

    TypeScript