Surendra Varikallu

Surendra Varikallu

Full-Stack Developer | React, Node.js & PostgreSQL | Applied AI/LLMs | Scalable Systems Builder


About

I'm a final-year B.Tech Computer Science student and full-stack developer focused on building reliable, scalable web platforms and practical AI-powered applications. I built Skillnox, an online assessment and coding contest platform that recorded zero failed requests across 146,045 requests during a 5,000-virtual-user k6 stress test. Through iterative performance optimization, I reduced P99 latency from a 60-second timeout to 17 ms. I also developed Skillnox AI, a multi-round interview simulator powered by a locally hosted Qwen model using FastAPI and Ollama, and KITAGhire.in, a training and placement portal supporting college placement workflows for 3,000+ users. My technical interests include backend engineering, full-stack development, system design, performance optimization, authentication and security, and AI/LLM integration. I work with React, Next.js, Node.js, Express, Python, FastAPI, PostgreSQL, and related technologies. I won first place at the Codegnan Elevate X Hackathon with Global Smile and third place at the KITS Akshar CSE Department Hackathon with StudentConnect. I also served as a Google Student Ambassador, conducting technical workshops and growing a campus developer community. I'm interested in Software Development Engineer, backend, full-stack, and applied AI opportunities, and I'm open to relocating across India.

Skills
JavaScript
TypeScript
Python
SQL
React.js
Next.js
Tailwind CSS
Node.js
Express.js
FastAPI
Django
REST APIs
PostgreSQL
MongoDB
MySQL
Drizzle ORM
Redis
Git
GitHub Actions
Docker
Linux
Postman
Vercel
System Design
Load Testing
Authentication and Security
ServiceNow
Gemini API
Oracle OCI Generative AI
Qwen
Ollama
PyTorch
Experience

Google Student Ambassador

Google

Jul 2025 to Dec 2025
  • Delivered 7+ technical workshops on Google Cloud, Android development, and AI tools, engaging 300+ students.
  • Built a campus developer community of 150+ members from scratch.
  • Contributed to a 50% increase in Google program registrations on campus.

Full Stack Intern

Cognifyz Technologies

Jun 2025 to Jul 2025
  • Developed full-stack web applications using React, Node.js, and Express with REST API integration.
  • Optimized frontend-backend communication, reducing API response time by approximately 25%.
  • Automated repetitive workflows, reducing manual effort by approximately 40%.

Web Development Intern

Codegnan

May 2025 to Jun 2025
  • Designed and deployed AdventureAura, a responsive travel website with a page load time under two seconds.
  • Developed responsive interfaces using HTML, CSS, JavaScript, and Bootstrap for mobile and desktop.
  • Created UI/UX prototypes using Figma and Adobe XD and tested designs across 10+ device screen sizes.
Projects

Skillnox — Online Assessment & Coding Contest Platform

Built and deployed a college-scale online assessment and coding contest platform. Validated the system with a 5,000-virtual-user k6 stress test that recorded 146,045 requests with zero failed requests. Optimized production bottlenecks, reducing P99 latency from a 60-second timeout to 17 ms. Implemented anti-cheating protections and Redis-backed session management across an eight-worker PM2 cluster.

React.js
Node.js
Express.js
PostgreSQL
Redis
PM2
k6

Skillnox AI — AI Interview Simulation Platform

Developed an AI-powered interview simulator with aptitude, technical, and HR rounds. Integrated a locally hosted Qwen 2.5 3B model through Ollama and a Python FastAPI microservice. Built a concurrency-controlled evaluation queue, configurable pass/fail logic, a PostgreSQL-backed question bank with 1,000+ company-specific questions, voice-to-text answer capture, and webcam-based engagement signals.

Python
FastAPI
Qwen 2.5 3B
Ollama
PostgreSQL

KITAGhire.in — Training & Placement Portal

Developed a centralized college training and placement portal serving 3,000+ students, administrators, and recruiters. Automated more than 90% of targeted placement workflows and reduced reporting time by approximately 80%. Built a TPO dashboard with placement analytics, student performance tracking, attendance monitoring, and Excel/PDF reporting. Implemented role-based access control and optimized database queries to support 300+ concurrent users during placement drives.

React.js
Node.js
PostgreSQL
Education

Bachelor of Technology (B.Tech)

KITS Akshar Institute of Technology · 8.03

Aug 2023 to May 2027