Shyam Kumar.
Full Stack Java & Mobile Application Developer
Accomplished Software Engineer with over 9+ years of specialized experience in Full Stack Java Development, Spring Boot Microservices, Reactive Programming, and Cross-Platform Mobile Applications (Flutter & React Native). Proven track record of architecting scalable enterprise systems at Fiserv and leading high-performance product teams in fast-paced Agile environments.
Organizations & Work Experience
Fiserv India Pvt Ltd(Noida Sec 62, India)
Senior Full Stack Java Developer
Architecting distributed microservices and micro-frontend modules for mission-critical financial software. Designed high-throughput notification processing and event-driven data streaming pipelines.
RV Solutions Pvt Ltd(Noida Sec 3, India)
Full Stack & Mobile Developer
Engineered end-to-end mobile applications and responsive administrative dashboards. Spearheaded cross-platform mobile delivery with Flutter and React Native.
JKM Travels(Palam, New Delhi, India)
Software Developer
Developed fleet tracking and transport booking web and mobile applications with automated real-time alerts and report generation.
Emagic Solutions(Noida Sec 3, India)
Junior Java Developer
Built modular modules for educational and attendance tracking portals utilizing Spring MVC and relational database structures.
Enterprise Projects & Delivery
Magic Bricks Marketplace
Full Stack Java Developer
Developed property marketplace enabling users to search, filter, and list properties. Built reusable React frontend components and designed Apache Solr queries for sub-second search filters.
Neco Insurance Mobile App (Nepal)
Mobile App Engineer & Java Backend
Engineered complete insurance mobile app in React Native for clients in Nepal. Developed reusable UI component library and wrote Spring Boot REST APIs for policy lifecycle and instant claim submissions.
Quiz Battle Gaming Platform
Full Stack Developer
Developed live interactive quiz gaming app in React Native alongside an exhaustive Spring Boot Admin Portal. Enables real-time game matchmaking, point calculations, monetary reward rules, and instant results.
Vefr (Vegetable & Fruit E-Commerce)
Backend & Admin Panel Engineer
Engineered robust Admin Portal for grocery delivery platform. Features included category hierarchal structures, instant price adjustments, automated discounts, Gold membership subscriptions, and logistics tracking.
Sure Bus Transport Booking System
Full Stack Java Developer
Developed bus ticketing & reservation web system for multi-city travel with automated route search, seat reservation, payment gateways, group discounts, and automated PDF booking confirmations.
Smart Employee Management & Attendance
Java Full Stack Developer
Real-time employee biometric & RFID attendance tracker. Automated payroll computations, overtime tracking, dynamic shift allocations, and audit reports to eliminate time theft.
Smart School ERP System
Full Stack Java Developer
Multi-tenant ERP for educational institutions. Automated paperless report generation (grade cards, fee slips, certificates) using Apache POI and iText, with dedicated role-based portals for Admins, Faculty, Students, and Parents.
Open Source Packages & Developer Tools
Creator & Lead Developer
Engineered an interactive developer web utility to parse, validate, visualize, format, and convert complex JSON datasets with instant tree hierarchy viewing and syntax diagnostics.
Extension Creator & Developer
Built and published a Google Chrome extension (Manifest V3) for developers and QA engineers to quickly inspect, format, validate, and navigate nested JSON payloads with zero latency and color-coded hierarchy directly in the browser.
Creator & Full Stack Engineer
Developed a modern AI prompt discovery and optimization platform tailored for ChatGPT, Claude, Midjourney, and developer workflows. Features categorized prompt libraries and prompt testing.
Creator & Maintainer
Designed and published an open-source Flutter notification package with unique animation mechanics, custom Snackbars, and interactive banners. Actively used by over 200+ developers with 245+ hearts on pub.dev.
Author & Maintainer
Published Java open-source artifact on Maven Central (info.shyamkumar:SecureData) providing high-performance cryptographic utilities, payload encryption, and secure data sanitization for Java & Spring Boot backends.
Android Developer
Feature-rich Android utility with General Calculation, Age calculator, Percentage, Discount, Date differences, EMI comparisons, and GST breakdown tools.
Android Developer
Interactive multiplication problem solver with unlimited table generators and single/multiplayer math challenge practice quizzes.
Game Developer
Educational vocabulary puzzle game helping players build English proficiency through interactive word grid matching.