Pushkar Kathayat

Technical Skills

Server-Side Languages Python (6+ years), Node.js (4+ years), JavaScript, TypeScript Backend Frameworks Django (Django REST Framework), FastAPI, Flask, Express.js, tRPC, Hono API Design & Development RESTful APIs, GraphQL (Apollo Server, GraphQL Yoga), gRPC, WebSockets, OpenAPI/Swagger Databases (Relational) PostgreSQL (advanced queries, indexing, optimization), MySQL, SQLAlchemy, Django ORM, Drizzle ORM Databases (Non-Relational) MongoDB, Redis (caching, pub/sub, rate limiting), Vector Databases (pgvector) Database Optimization Query performance tuning, indexing strategies, connection pooling, N+1 query elimination, database sharding Security & Auth Authentication (JWT, OAuth 2.0, session-based), Authorization (RBAC, permissions), data encryption, HTTPS/TLS, SQL injection prevention, XSS/CSRF protection, input validation Async Processing BullMQ, Celery, RabbitMQ, Redis Queue, async/await patterns, background job systems, distributed task queues Testing Frameworks pytest (unit, integration, fixtures), unittest, Jest, Vitest, API testing (Postman, Insomnia), TDD, end-to-end testing Containerization Docker, Docker Compose, container orchestration, multi-stage builds, image optimization Frontend (Collaboration) TypeScript, React, Next.js, API integration, cross-functional team collaboration Cloud & DevOps AWS (Lambda, EC2, RDS, S3, SES, API Gateway), GCP, CI/CD (GitHub Actions, GitLab CI), monitoring Code Languages Python, JavaScript/TypeScript, C/C++ (intermediate), Java (intermediate), Rust (learning), Go (learning)

Professional Experience

Backend Engineering Specialist | Contract Projects (Multiple Clients) | Remote

Jan 2024 - Present

Architected 4 production-grade backend systems using Python (FastAPI, Django) and Node.js serving thousands of users
Designed RESTful and GraphQL APIs with comprehensive OpenAPI documentation, versioning, and rate limiting
Built VerifyForge email validation API achieving 99%+ accuracy, sub-2s response times using async/await patterns
Engineered job aggregation backend processing 5,000+ listings with BullMQ queues, PostgreSQL full-text search, Redis caching
Implemented comprehensive security: JWT/OAuth 2.0 authentication, RBAC authorization, SQL injection prevention, data encryption
Optimized database performance with indexing, query optimization, connection pooling, reducing response times by 60%
Built async processing systems using Celery and BullMQ for background jobs, distributed task queues, and retry mechanisms
Established testing practices with pytest and Jest achieving 85%+ code coverage (unit, integration, API endpoint tests)
Deployed microservices using Docker containers with multi-stage builds and horizontal scaling
Collaborated with frontend teams using TypeScript/React to design efficient API contracts

Backend Developer | Semantic Pen (AI Platform) | Remote

Jan 2023 - Dec 2023

Built AI-powered content platform backend using Python/Node.js handling 10,000+ users with LLM integration and vector search
Designed RESTful APIs for document processing, vectorization, and content generation with comprehensive error handling
Architected PostgreSQL with pgvector extension for semantic similarity matching and complex query optimization
Implemented JWT authentication/authorization with refresh token rotation, RBAC, and session management
Built background job pipeline using Celery and Redis for async document vectorization with retry logic
Optimized API performance through database optimization, connection pooling, Redis caching, and response compression
Established comprehensive testing suite with pytest covering unit, integration, and API endpoint tests (fixtures/mocks)
Deployed on AWS Lambda/ECS with auto-scaling, load balancing, and CloudWatch monitoring
Implemented security best practices: HTTPS, CORS, rate limiting, input sanitization, secure password hashing

Backend Developer | YouTube Transcript Generator | Remote

Mar 2023 - Jul 2023

Built high-performance API using Python FastAPI with async/await for video transcription services
Implemented Redis caching and rate limiting for API protection and performance optimization
Designed PostgreSQL schema with normalization, indexing strategies, and foreign key constraints
Created background task system using Celery for distributed transcription jobs with worker scaling
Implemented JWT authentication and request validation using Pydantic models
Built comprehensive test suite with pytest (unit, integration, API tests) achieving 80%+ coverage

Backend Developer | Degions | India

Nov 2018 - Feb 2023

Developed Python/Node.js backend APIs for SEO analytics tools serving thousands of users
Built RESTful APIs with Flask and Django REST Framework with OpenAPI documentation and versioning
Implemented data processing pipelines using Python with PostgreSQL, MySQL, and Redis for real-time analytics
Designed secure authentication systems with session management and API key validation
Published 4 Chrome extensions with backend APIs deployed on AWS (EC2, RDS, S3)
Implemented database optimization: query optimization, indexing, caching (50% response time reduction)

Backend Developer | Techgeekers Blog | India

Mar 2014 - Oct 2018

Built backend systems using Python Django for content management and analytics with MySQL
Implemented RESTful APIs and optimized database queries with indexing (50% load time reduction)
Developed authentication/authorization systems with Django's security features

Featured Backend Projects

VerifyForge Backend | verifyforge.com

Email validation API - 99%+ accuracy, SMTP verification, sub-2s response times

Tech: Python FastAPI, PostgreSQL, Redis, BullMQ, Docker, pytest | JWT auth, rate limiting, async processing, unit/integration tests

Real Jobs From Anywhere | realjobsfromanywhere.com

Job aggregation platform - 5,000+ listings, distributed scraping, GraphQL API

Tech: Node.js, tRPC/GraphQL, PostgreSQL, BullMQ, Redis, Docker | Message queues, full-text search, Jest testing

FinderLaunch | finderlaunch.com

Product discovery platform - Authentication, voting system, Stripe payment integration

Tech: Node.js, TypeScript, tRPC, PostgreSQL, Redis, Stripe, Docker | JWT auth, database transactions, webhooks

Semantic Pen | semanticpen.com

AI content platform - LLM integration, vector database (pgvector), 10,000+ users

Tech: Python, Node.js, PostgreSQL (pgvector), AWS Lambda, Celery, Redis, Docker | JWT/RBAC, async processing, pytest

YouTube Transcript Generator | getyoutubetranscript.com

Video transcription API - Async processing, distributed job system, comprehensive testing

Tech: Python FastAPI, PostgreSQL, Redis, Celery, Docker, pytest | Rate limiting, background jobs, unit/integration tests

Professional Summary

Technical Skills

Professional Experience

Featured Backend Projects

Education