Hey there! 👋 I'm Elfin Sanjaya, a Fullstack Developer and Mentor with 6+ years of experience building modern web and mobile applications.

What I Do:

• 🤖 Leverage AI tools (Claude, GitHub Copilot) to enhance development productivity
• 👨‍🏫 Mentor developers at BuildWithAngga, teaching MERN stack and modern web practices
• 🏢 Co-Founded Erai Tech - building Point of Sales (POS) application
• 💼 Co-Founded CodeAtHome - software agency and academy for Indonesian tech community
• 💻 Work with companies like Tree-Tree, Dalenta, Swing, and more

My Approach:
Combining human creativity with AI capabilities to build innovative and efficient solutions.

Fullstack Developer @ Tree-Tree · Jan 2022 - Present

• Building scalable full-stack applications with modern tech stack
• Implementing AI-assisted development workflows

Mentor Backend Developer @ BuildWithAngga · Mar 2021 - Present

• Teaching MERN Stack (MongoDB, Express.JS, Node.JS, React.JS, Next.JS, TypeScript)
• Mentoring students through real-world projects like Hotel Booking System

Co-Founder & Developer @ Erai Tech · July 2025 - Present

• Building Point of Sales (POS) application
• Developing modern web applications and digital products

Co-Founder & Software Engineer @ CodeAtHome · Sep 2019 - Present

• Co-founded software agency and academy for Indonesian tech community
• Delivering software development services and tech education
• Building tools and solutions for clients and students

Full Stack Engineer @ Swing · Aug 2023 - Jun 2025

• Developing full-stack applications with modern technologies

Back End Developer @ PT. Dans Multi Pro · Aug 2023 - Mar 2024

• Built backend systems for e-commerce solutions with scalable APIs

Software Engineer @ Dalenta · Sep 2020 - Okt 2022

• Developing digital headquarters for business administration and operations
• Built postal sales system and self-service solutions for MSME

Software Engineer @ PT. Rajawali Lestari Inovasi · Mar 2019 - Sep 2020

• Built SaaS connecting marketplaces to social media
• Stack: Node.JS, Express.JS, React.JS, MySQL, Redux

Software Engineer @ Glovory Technologies Indonesia · Mar 2019 - Sep 2019

• Developed scalable software solutions

Web Developer @ Gama Textile · Feb 2019 - Nov 2019

• Built web and mobile e-commerce platforms

Languages & Frameworks

State Management & Tools

Databases

Cloud & Deployment

AI Development

const currentFocus = {
  architecture: ['Design Patterns', 'Microservices', 'Clean Architecture'],
  skills: ['Technical Writing', 'Content Creation'],
  personal: ['Leadership', 'Self Improvement'],
  ai: ['Prompt Engineering', 'AI-Assisted Development']
};

Universitas Teknokrat Indonesia · Computer Science

• Active in PROTEK (Programming Teknokrat) community
• Chairman of project division (2015-2019)

Teaching Experience:

• Assistant Lecturer, Universitas Teknokrat Indonesia (2017-2019)
• Instructor, Andaglos Developer Academy (2018-2019)
  • Fullstack JavaScript & React Native Bootcamp