I am a backend-focused full-stack developer with strong fundamentals in data structures, system design, and scalable APIs.
I build real-world products using Java, Spring Boot, SQL, cloud services, and modern frontend tooling.

Currently, I am expanding into Machine Learning and AI, with hands-on projects in Python, NLP, and data engineering.

• 🔧 Backend-first engineer with full-stack exposure
• 📦 Built production-style APIs (auth, payments, file storage, RBAC)
• ☁️ Cloud, DevOps, and CI/CD aware
• 🧠 Strong problem-solving & DSA foundation

• Java, Spring Boot, Spring Security
• RESTful APIs, JWT Authentication
• MySQL, PostgreSQL, MongoDB
• Kafka (basics), Redis (conceptual)

• HTML5, CSS3, JavaScript (ES6+)
• React.js
• Tailwind CSS, Bootstrap

• AWS (EC2, S3 – fundamentals)
• Docker
• CI/CD concepts
• Linux

• Python
• Machine Learning fundamentals
• NLP (NLTK)
• Data preprocessing & analysis

• Git & GitHub
• Postman
• Jenkins
• Firebase, Supabase

Tech: Spring Boot, Supabase, Razorpay, HTML/CSS/JS

• Authentication (Email + Google OAuth)
• Secure digital product purchase flow
• Razorpay payment integration
• Role-based admin controls
• Cloud file storage & access control

Tech: Spring Boot, MySQL, Spring Security

• User & driver authentication
• Ride lifecycle management
• Secure APIs with role separation

Tech: Spring Boot, REST APIs

• Seat availability logic
• Booking workflows
• Clean controller-service-repository architecture

Tech: Python, NLTK

• Text preprocessing
• Tokenization, stemming, frequency analysis

• Strong grasp of DSA
• Active on LeetCode
• Focused on writing clean, readable, and scalable code

• Machine Learning & AI
• System Design (LLD & HLD)
• Advanced Spring Boot & Cloud Architecture

• 💼 LinkedIn: https://linkedin.com/in/dheeraj-singh-bc21048
• 🐦 X (Twitter): https://x.com/dhrax21bc
• 💻 GitHub: https://github.com/dhrax21
• 🧠 LeetCode: https://leetcode.com/u/dhrax21bc/
• 📧 Email: dhrax21bc@gmail.com

⭐ Always building. Always learning. Focused on engineering that scales.