@krishankumar9
I build scalable full-stack web applications, real-time platforms, and healthcare workflows.
IndiaI've built and improved full-stack products at Ultrashield Softwares and Shine Web Services, including HealthCore, a patient management system supporting scheduling, patient records, and secure doctor-patient workflows.
Across dating, wellness, and asset-management applications, I've delivered real-time communication, payment subscriptions, AWS deployments, Redis-backed queues, and performance improvements of up to 60%.
Work history, roles, and key accomplishments
Ultrashield Softwares
Nov 2025 - Present (10 months)
Contributed to backend improvements including advanced filters and Redis queue management using Amazon ElastiCache, and app deployment on AWS EC2 via GitHub Actions workflow.
Shine Web Services
May 2022 - Oct 2025 (3 years 5 months)
Contributed to the development of Healthcore, a patient management system, focusing on appointment scheduling, patient management and engagement, secure doctor-patient interactions, and improving healthcare workflows.
Degrees, certifications, and relevant coursework
Bachelor of Computer Application, Computer Application
2016 - 2019
Bachelor of Computer Application (BCA) from Kurukshetra University, completed in 2019.
Frontend Developer (React), Frontend Development
Earned the Frontend Developer (React) certification from HackerRank.
Javascript (Basic) Certificate, JavaScript
Earned the Javascript (Basic) Certificate from HackerRank.
SQL (Basic) Certificate, SQL
Earned the SQL (Basic) Certificate from HackerRank.
Software and tools used professionally
Amazon EC2
Amazon S3
GitHub Actions
MySQL
PostgreSQL
MongoDB
Amazon Route 53
Node.js
Spring Boot
Next.js
NestJS
Bootstrap
Material-UI
Vuetify
Chrome DevTools
Redis
Jira
Jest
React
Vue.js
JavaScript
HTML5
Java
Amazon ElastiCache
BullMQ
ExpressJS
PM2
Stripe
Socket.IO
Redux
vuex
TypeScript
DevExtreme
Git
Docker
Twilio
Zoho Sprints
SQL
Mongoose
Vite
Pinia
Razorpay
Agora
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