Available for Software Engineer / Backend Roles

Engineering scalable backends, asynchronous pipelines & robust APIs.

Hi, I’m Debjyoti Saha. I'm a Backend Developer specializing in Python, FastAPI, Django REST Framework, Celery, Redis, and PostgreSQL. Currently building open-source structural software at FOSSEE Osdag — IIT Bombay.

View / Download Resume GitHub LinkedIn
Current Role SDE Intern @ IIT Bombay
Graduation B.Tech CSE (2027)
Location India (Open to Relocate / Remote)
Core Stack Python · FastAPI · Django · Postgres
debjyoti_profile.json
Debjyoti Saha

Debjyoti Saha

Software Development Intern

FOSSEE Osdag — IIT Bombay
uptime: 99.98%
concurrency: Celery + Redis
auth: JWT & HMAC Signing
<01. Experience>

Work & Internships

Real-world production engineering and open-source contributions.

FOSSEE Osdag — IIT Bombay

Software Development Intern Remote
Sep. 2026 — Present

Selected for Osdag, an open-source structural engineering software platform under FOSSEE at IIT Bombay, following a rigorous screening round requiring the design and implementation of a secure authentication architecture.

  • ▹ Engineered a robust, production-grade authentication subsystem utilizing Django and JSON Web Tokens (JWT) with secure token refresh and session invalidation.
  • ▹ Collaborating on structural engineering calculations and core backend modules, ensuring rigorous data validation and adherence to open-source code quality standards.
  • ▹ Participating in code reviews, automated unit testing, and cross-functional team synchronization for continuous deployment.
Python Django JWT REST APIs Git Open Source
<02. Featured Projects>

System Architecture & Case Studies

Deep dives into distributed processing, API reliability, and data design.

Featured Architecture Distributed Systems
Repository ↗

Reliable Webhook Delivery Platform

A high-throughput, fault-tolerant webhook ingestion and dispatch engine built to guarantee message delivery even when downstream consumer endpoints experience downtime.

⚡ System Event & Delivery Pipeline
FastAPI Async Ingest API
➔
Redis Message Broker & Rate Limit
➔
Celery Workers Fan-Out & HMAC Signing
➔
PostgreSQL Audit Logs & State
At-Least-Once Delivery

Implemented Celery asynchronous fan-out dispatch with automatic exponential backoff retry algorithms to handle intermittent network failures gracefully.

Payload Security

Equipped every outgoing HTTP request with cryptographic HMAC-SHA256 signatures in headers, enabling consumers to verify payload authenticity and prevent tampering.

Production Observability

Integrated Redis-backed rate limiting (slowapi) and full containerization via Docker Compose, including Flower dashboard for real-time task queue telemetry.

Data Consistency

Employed asynchronous SQLAlchemy with Alembic schema migrations and rigorous idempotent delivery verification tests.

FastAPI Celery Redis SQLAlchemy (Async) PostgreSQL Docker Compose Flower Pytest
Production Full-Stack RAG AI & REST
Live App ↗ Repository ↗

CSEHub — Educational Resource Hub & RAG System

A comprehensive educational platform featuring a modular Django REST API backend, optimized relational query architecture, and a Retrieval-Augmented Generation (RAG) assistant.

Relational Data Architecture

Architected 10 relational models across 4 modular Django apps, eliminating N+1 query bottlenecks using select_related and prefetch_related across multi-table joins.

RAG Vector Intelligence

Engineered a contextual Q&A chatbot grounding responses in stored documentation via Pinecone vector embeddings and Google Gemini API integration.

API Documentation & RBAC

Implemented DRF ViewSets with automated OpenAPI/Swagger and ReDoc schemas via drf-spectacular, protected by granular admin/user permission classes.

Django DRF PostgreSQL Pinecone Gemini API Swagger/OpenAPI Vercel
Real-Time Backend WebSockets & Telephony
Repository ↗

Apadamitra AI — Disaster Alert & Mitigation System

Emergency dispatch platform built with FastAPI and WebSockets, delivering automated voice and SMS broadcast alerts and real-time natural language disaster triage.

Real-Time WebSockets

Designed a bidirectional WebSocket communication channel for streaming real-time voice disaster queries with sub-second feedback.

Custom Middleware

Constructed an in-memory sliding-window rate-limiting middleware enforcing 120 req/minute per client with automatic thread-safe cleanup routines.

Multi-Service Orchestration

Coordinated Twilio for automated voice/SMS calls, ElevenLabs for synthesized speech, and Gemini AI for real-time multilingual crisis summarization.

FastAPI WebSockets Twilio API ElevenLabs Gemini Middleware
<03. Proof of Engineering>

Interactive API Playground

Test mock backend endpoints live in your browser and inspect cryptographic signatures, headers, and responses.

api-client: https://api.debjyoti.dev HTTP/2
GET
Status: 200 OK • Latency: 18ms • Content-Type: application/json 
{
  "status": "healthy",
  "service": "debjyoti-backend-engine",
  "version": "2.4.0",
  "internship": "FOSSEE Osdag @ IIT Bombay",
  "worker_pool": {
    "celery": "online",
    "active_workers": 4,
    "broker": "redis://127.0.0.1:6379/0"
  },
  "database": {
    "engine": "PostgreSQL 16",
    "connections": "pooled (asyncpg)",
    "status": "connected"
  },
  "uptime_seconds": 864200
}
<04. Technical Toolkit>

Skills & Architecture Disciplines

Proficiencies honed across production backend systems, open-source codebases, and CS coursework.

Core Backend & APIs

  • Python (3.10+)
  • FastAPI
  • Django & DRF
  • RESTful API Design
  • WebSockets
  • drf-spectacular (Swagger)

Concurrency & Queues

  • Celery Worker Queues
  • Redis (Cache & Broker)
  • SQLAlchemy (Async)
  • Alembic Migrations
  • Idempotency Design
  • Exponential Backoff

Databases & Security

  • PostgreSQL
  • Database Schema Design
  • N+1 Optimization
  • JWT Authentication
  • HMAC Payload Signing
  • Role-Based Access (RBAC)

DevOps & Testing

  • Docker & Docker Compose
  • Linux / Bash
  • GitHub Actions (CI/CD)
  • Pytest & Unit Testing
  • Flower (Celery Monitor)
  • Postman / Bruno

AI, Search & Integrations

  • Pinecone (Vector DB)
  • RAG Architectures
  • Google Gemini API
  • Twilio Telephony & SMS
  • ElevenLabs Speech
  • Cloudinary

CS Fundamentals

  • Data Structures & Algorithms
  • Database Management (DBMS)
  • Operating Systems (OS)
  • Computer Networks (CN)
  • Object-Oriented Programming
  • System Reliability
<05. Education & Credentials>

Academic Background & Certifications

Solid theoretical grounding coupled with industry-standard certifications.

Bachelor of Technology

Murshidabad College of Engineering and Technology

Computer Science & Engineering

Aug. 2023 — Jun. 2027

Murshidabad, West Bengal, India

Relevant Core Coursework:

Data Structures & Algorithms, Object-Oriented Programming, Database Management Systems, Operating Systems, Computer Networks, Software Engineering.

HackerRank Verified Certifications

Problem Solving (Intermediate & Basic) · Python · SQL

Verified 2026

100 Days of Code: The Complete Python Pro Bootcamp

Udemy — Comprehensive OOP, Web Development & Automation

Completed 2025
<06. Let's Connect>

Ready to build high-performance systems.

Whether you're looking for a backend software engineering intern, full-time developer, or discussing distributed systems, my inbox is open!

Email Directly
sahadebjyoti363@gmail.com
Resume (PDF)
Debjyoti_Saha_Resume.pdf Download ↗
LinkedIn
in/debjyotisaha2004 Connect ↗
GitHub
github.com/captain-07 Follow ↗