Immediately available · No notice period

Jai Chandra Kumar Devarajan

Python Backend Developer · Bangalore, India

Backend engineer specializing in Django REST Framework, FastAPI, and AI/LLM integration. I build REST APIs, microservices, and AI agent pipelines that run in production.

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About

Summary

Computer Science graduate (B.E., June 2026) with 9 months of production internship experience as a Python Backend Developer and Technical Lead. Specializes in Django REST Framework, FastAPI, and AI/LLM integration (OpenAI GPT-4, Gemini). Built AI agent pipelines, REST APIs, and microservices used in production.

9 mo
Production experience
4
Engineers led
100+
DSA problems solved
Jun 2026
Graduation
Experience

Where I've worked

Full Stack Developer Intern · Netpy Technologies

Tech Lead & Project Manager

Oct 2025 – Jun 2026 · Bangalore
  • Led a team of 4 engineers, owning end-to-end architecture, sprint planning, and delivery for production-grade client projects.
  • Engineered scalable REST APIs using Django REST Framework and FastAPI for high-traffic production environments.
  • Integrated OpenAI GPT-4 and Gemini APIs to build AI-powered features and automated agent pipelines for clients.
  • Established Docker-based CI/CD pipelines with GitHub Actions, enabling fast and reliable continuous delivery to production.
  • Implemented JWT authentication, Redis caching, and RBAC for granular access control across distributed microservices.
Projects

Selected work

A mix of production systems, AI agent pipelines, and infrastructure work.

Bigpool

Multi-Vendor E-Commerce Marketplace

bigpool.in →
  • Full-stack marketplace with Next.js 16 (App Router, server components), React 19, TypeScript, and Tailwind/shadcn-ui — customer and seller portals across 8+ categories, cart, and checkout with Zustand state.
  • JWT access/refresh-token auth with bcrypt hashing, Supabase (PostgreSQL) for data, Razorpay payments (UPI/card/netbanking), and Resend transactional email.
  • Installable PWA with web-push notifications, packaged for Android via Capacitor; deployed on Render behind Cloudflare DNS, tested with Vitest.
  • Cloudinary image uploads and automated component tests with Testing Library, on a responsive UI built with Tailwind CSS and shadcn/ui primitives.
Next.js 16TypeScriptSupabaseRazorpayPWA

StackSense

Observability & Monitoring Platform · Founder

stacksense.in →
  • Lightweight, non-blocking SDK (under 2ms overhead) that autonomously maps service topology by tracing downstream microservices, database queries, and async message queues.
  • Heuristic anomaly detection engine that correlates dispersed telemetry signals to pinpoint root causes of latency spikes (P95/P99 regressions) and error cascades in real time.
  • Built for backend/platform teams running high-concurrency infrastructure — distributed tracing correlation, capacity planning, and alert-fatigue reduction.
  • Founded and shipped the platform end-to-end as a solo technical founder — architecture, SDK design, metrics pipeline, and product direction.
FastAPIMicroservicesSDKAnomaly DetectionDistributed Tracing

Gill Organics

Organic Farm-Box Delivery Platform · Production

gillorganics.netpy.in →
  • Django REST Framework backend and React + Next.js (App Router) frontend, with role-based Customer, Packer, and Driver modules plus an order History module for end-to-end fulfillment tracking.
  • JWT authentication, Redis caching, and PostgreSQL query optimization to serve high-throughput product catalog and order-tracking APIs at low latency.
  • Streamlined the pack-and-dispatch workflow from customer order to driver delivery, improving transaction reliability by 6%.
  • MongoDB used alongside PostgreSQL for flexible catalog data, with the React/Next.js frontend consuming the DRF API layer end to end.
Django REST FrameworkReactNext.jsPostgreSQLRedis

Job Agent

Autonomous Job Application Agent

Coming soon
  • Scrapes Greenhouse, Lever, and Ashby job board APIs directly across 40+ target companies, pulling roughly 1,000 listings per run.
  • Custom scoring engine ranks jobs 0–100 by title/tech-stack match, AI/LLM keyword bonus, location, and experience-level fit.
  • Playwright-driven application engine auto-fills forms and generates cover letters across LinkedIn, Naukri, Wellfound, and Indeed.
  • FastAPI SaaS backend with JWT auth, bcrypt hashing, and Fernet-encrypted credential storage, plus dedup tracking to avoid re-applying to the same job.
PythonFastAPIPlaywrightAutomation

AI Interviewer

Voice-Driven Mock Interview Platform

Coming soon
  • Multi-provider LLM layer swaps between Claude, GPT-4o, and local Ollama for the interviewer persona and post-interview scoring.
  • Full voice pipeline: mic capture → Deepgram speech-to-text → Claude response → ElevenLabs TTS, played through an audio-reactive 3D avatar.
  • Prisma-modeled interview data with per-message scoring, resume parsing (PDF/DOCX), and an admin dashboard for jobs and candidates.
  • 3D avatar built with React Three Fiber and Three.js, with procedural jaw/blink animation driven by live audio amplitude for lip-sync.
Next.jsClaudeDeepgramThree.js
Skills

Technical toolkit

Languages

PythonJavaScriptTypeScriptJavaC++

Backend

DjangoDjango REST FrameworkFastAPIFlaskREST API DevelopmentMicroservices Architecture

AI & LLMs

OpenAI GPT-4Anthropic ClaudeGemini APILLM IntegrationAI Agent Pipelinesn8nMake.comPrompt EngineeringWebhooks

Databases

PostgreSQL (Optimization)MongoDBRedisSupabaseSQLitePrisma ORMSQLAlchemy

Frontend

React.jsNext.jsTypeScriptTailwind CSSshadcn/uiMERN Stack

Cloud & DevOps

AWS (EC2, Lambda)GCPDockerKubernetesJenkinsCI/CD PipelinesGitHub Actions

Tools

GitGitLabJiraPostmanSeleniumPlaywrightAgile/ScrumTechnical Leadership
Services

What I can build for you

From backend systems to full products — design, build, and ship.

Website Builder

Full-stack websites from wireframe to launch, built for speed and clarity.

Android App Development

Native and cross-platform Android apps with clean, maintainable code.

Software Development

End-to-end software systems — architecture, APIs, and production delivery.

Database Design

Schema modeling, relationships, and query optimization for scale.

Backend Development

REST APIs, microservices, and integrations built for reliability.

Frontend Development

Responsive, accessible interfaces with modern component architecture.

UI/UX Design

Wireframes, design systems, and user flows grounded in usability.

Blender 3D

3D modeling, texturing, and rendering for product and concept visuals.

Video Editing

Clean cuts, pacing, and color grading for promo and product videos.

Product Building

From idea to shipped product — scoping, building, and iterating fast.

Workflow Automation

n8n and Make.com pipelines that connect apps, APIs, and triggers.

AI & LLM Agents

Agent pipelines with tool calling, prompt engineering, and RAG on GPT-4/Gemini.

Background

Education & credentials

Education

S.E.A College of Engineering, Bangalore

B.E. – Computer Science & Engineering

2022 – Jun 2026

RK Vision PU College

PUC – PCMB

2020 – 2022

Achievements

Contact

Let's build something together

Open to backend, full-stack, and AI engineering roles. Reach out directly — I'm available to start immediately.

devarajanchandu@gmail.com+91 9663397727