Senior Software Engineer

Islamabad, Pakistan
+92 333 2966316
sanjayrassani@gmail.com | github.com/sanjay-rassani | linkedin.com/in/sanjayrassani

Senior Software Engineer with 4+ years of experience building scalable backend systems, SaaS platforms, and distributed applications using Python, Django, and FastAPI. Specialized in high-performance backend architecture, microservices, event-driven systems, and database optimization. Experienced in designing enterprise-grade platforms with AI integrations, real-time analytics, and large-scale processing pipelines. Strong background in production systems, API development, performance optimization, and maintainable software design across remote and onsite teams.

Languages: Python, C, SQL
Frameworks: Django, Django REST Framework, FastAPI
Backend: REST APIs, Microservices, Celery, Redis, Kafka, WebSockets
Databases: PostgreSQL, MySQL, Elasticsearch
DevOps: Docker, Kubernetes, Linux, Git, CI/CD
Tools: Jira, Postman, Swagger, PyCharm, VS Code, Jupyter Notebook
Automation: Selenium, Pyppeteer, Background Processing, Watchdog
Cloud & Storage: S3 Integrations, Multi-service Architecture

Tech Stack: Python, Django, FastAPI, Kafka, Kubernetes, Celery, Redis, Elasticsearch, Docker

• Architected a scalable AI-powered Digital Asset Management platform (NIMAR) using Django REST Framework, integrating 8+ AI models and Kafka streaming to reduce processing time by 70%.
• Enabled sub-second search across 10M+ assets using PostgreSQL Full Text Search and Elasticsearch optimization.
• Designed an event-driven microservices architecture using Kafka, Celery, and Redis, supporting 10K+ concurrent requests with 99.9% uptime.
• Automated processing of 50K+ media files daily with S3 integrations and distributed background workers.
• Built a real-time analytics engine combining live and external data sources, reducing report generation from minutes to seconds.
• Architected enterprise-grade RBAC, JWT authentication, MFA, and data isolation across 15+ Django applications supporting 1,000+ enterprise users.

Tech Stack: Python, Django, FastAPI, Selenium, Pyppeteer, Celery, Redis, Docker

• Designed and led backend architectures for multiple client products, translating business requirements into scalable production systems.
• Built and scaled a high-volume web scraping platform using Django, Selenium, and Pyppeteer with robust async processing and failure recovery.
• Developed secure and high-performance SaaS backend services using FastAPI with Celery and Redis for task orchestration.
• Improved backend reliability through optimized workflows, API security, and production-grade deployment practices.

Tech Stack: Python, Django, PostgreSQL, Celery, Redis, Docker

• Contributed to OClass, a large-scale SaaS class management platform used by dance studios, tuition centers, gyms, and health clubs across Singapore.
• Implemented new features, fixed production issues, and deployed hotfixes with strong test coverage and maintainable code practices.
• Optimized APIs and database queries, significantly reducing response times and improving platform scalability.
• Led a major Django framework upgrade from version 3.2 to 4.2.3, managing legacy code refactoring and dependency migrations.
• Built background automation pipelines using Celery and Redis and supported onboarding of new developers through technical mentorship.

Tech Stack: Python, Django, SQL, Git, Linux

• Developed and maintained backend services for multiple Django applications with client-specific business logic.
• Resolved production issues and improved application stability, performance, and database consistency.
• Worked closely within agile teams to deliver reliable backend solutions using Django ORM and relational databases.

Tech Stack: Django, Python, ReactJS, Redux, PostgreSQL, PayPal API, Bootstrap, JavaScript

• Built a fully customized e-commerce platform that recommends devices based on user reviews and ratings.
• Developed features including shopping cart, product recommendations, pagination, search, user profiles, and order management.
• Implemented complete checkout workflows including shipping, payment methods, and PayPal/credit card integration using React PayPal.
• Built admin modules for product, user, and order management with scalable backend architecture.

• The Complete SQL Bootcamp — Jose Portilla | Udemy
• Object Oriented Java Programming: Data Structures and Beyond Specialization — Leo Porter | Coursera

B.S. Computer Science | University of Sindh, Jamshoro, Sindh, Pakistan
January 2018 – January 2022

Relevant Coursework:
Data Structures & Algorithms, Artificial Intelligence, DBMS, OOP, Computer Programming, Web Programming, Operations Research

• Designed AI-integrated enterprise platforms handling 10M+ digital assets
• Built microservices systems supporting 10K+ concurrent requests
• Improved backend processing performance by 70% through architecture optimization
• Led major Django framework upgrades in large-scale production systems
• Strong expertise in scalable backend systems, distributed architecture, and performance optimization