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mayankSystems/README.md

Hi, I'm Mayank Gupta 👋

Senior Backend Engineer from India 🇮🇳

LinkedIn   GitHub   LeetCode   HackerRank   GeeksforGeeks


👨🏻‍💻 About Me

  • 🌍 From New Delhi, India · Currently in Bengaluru, Karnataka
  • 💼 Software Engineer @ PayU Digital Labs Pvt. Ltd. (Mar 2026 – Present)
  • 💼 Previously Senior Software Engineer @ HCLSoftware (Aug 2022 – Mar 2026)
  • 🚀 Backend Development enthusiast with expertise in building high-throughput, distributed systems
  • 🛠️ Skilled in Java · Spring Boot · Microservices · Kafka · Docker · Kubernetes · AWS · SQL · MongoDB
  • 🧪 Strong advocate for TDD, clean code, and SOLID principles — maintaining 85%+ code coverage
  • 🎓 M.Tech from NIT Warangal | B.Tech from NSUT West Campus
  • 🎮 Gaming & 📚 reading books in my downtime
  • ⚡ Fun fact: Knowledge seeker who loves diving deep into backend systems
  • 📫 Reach me at: ce.mayank8@gmail.com

💼 What I've Been Up To

At HCLSoftware, I've been working on enterprise-grade backend systems:

  • 🔧 Designed 10+ RESTful APIs serving 50,000+ daily transactions with 99.95% uptime
  • 👥 Led a 5-developer team in Scrum delivering End-of-Day reporting solution for HDFC Bank, cutting report generation time by 60%
  • 📨 Built event & notification mechanisms in HCL UnO using Kafka to automate job/jobstream workflows
  • 🗄️ Introduced PostgreSQL support in HWA, expanding SQL compatibility by 40% across 200+ tables
  • 🔄 Migrated billing pipeline to a REST API-based solution, reducing processing time by 45%
  • ⚙️ Established CI/CD pipelines (Jenkins + Docker), slashing deployment time from 2 hrs → 20 minutes (6x faster)
  • 🐛 Resolved 350+ production defects maintaining 99.9% stability across globally deployed environments

🚀 Tech Stack

💻 Languages

Java C++ Python HTML5 CSS3 JavaScript

🧰 Frameworks & Libraries

Spring Boot Spring Cloud Spring Security Hibernate JUnit Mockito Node.js Bootstrap

🗄️ Databases

MySQL PostgreSQL Oracle SQL MongoDB

☁️ DevOps, Cloud & Infrastructure

Docker Kubernetes Jenkins AWS Kafka Linux

🛠️ Tools & Platforms

Git Maven Swagger Postman Grafana Prometheus Jira IntelliJ IDEA VS Code


🏗️ Featured Projects

Spring Boot · Microservices · MySQL · Docker · OAuth2

A proof-of-concept banking microservices application with 3 core services (Cards, Loans, Accounts), Gateway Server, and Config Server. Features end-to-end security via Spring Security & OAuth2 JWT validation, containerized deployment on Docker Hub, and 95%+ test coverage with JUnit & Mockito.

Java · Swing/AWT · OOPs · Design Patterns

A fully-featured Java chess application with a responsive Swing/AWT GUI, complete game logic including check/checkmate detection, pawn promotion, castling, and en passant.


📊 GitHub Stats


🏅 Certifications & Achievements

  • 📜 Spring Boot 3, Spring 6 & Hibernate — Jun 2024
  • 📜 Docker: Hands On — Aug 2024
  • 🏆 AIR 3770 in GATE CE 2020 — 97 percentile, score of 586
  • 🥇 Gold Medal in Geotechnical Engineering Lab Exam, IIT Bombay (2018) — Top 5%

Profile Views

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  1. DSA-Practice DSA-Practice Public

    my solutions to many dsa questions using Java

    Java

  2. FinVista-Nexus FinVista-Nexus Public

    Microservices - POC

    Java 1

  3. ProjectChess ProjectChess Public

    Simple Chess Application

    Java 1

  4. LearningJava LearningJava Public

    me learning java

    Java 1

  5. the-kafka-project the-kafka-project Public

    Kafka POC

    Java 1

  6. mayankgupta-portfolio mayankgupta-portfolio Public

    Mayank's Portfolio Website

    HTML