Umar Mahmood Shaikh

Experience

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  Aim Solutions

  Aug 2021 - Sept 2021

  .NET Developer

  Contributed to .Net Core and AngularJS web application development.Collaborated on RESTful API design and implementation.Built responsive UIs and implemented user authentication.Adept at Github, Postman, Jmeter for development and debugging.Strong collaboration and teamwork skills.

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  Tutor with Preply

  Aug 2021 - Sept 2021

  Tutor
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  Upwork

  Dec 2021 - Jul 2022

  Full-stack Developer

  Developed robust backend systems using Ruby on Rails, RSpec, and Grape APIs, GraphQL. Implemented efficient CRUD operations and leveraged PostgreSQL for reliable data storage. Contributed to the development of Health application, Basic Calculator APIs by using GraphQl and Grape APIs development in Ruby on Rails

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  ElGrocer by Smiles - Online Grocery Delivery

  Jul 2022 - now

  Backend Engineer

  Backend Developer- Single Store: Developed highly scalable APIs with Redis, slashing database calls by 30% and achieving sub-200ms response times through optimized queries and rigorous RSpec testing.- Eat Easy Integration: Integrated a third-party delivery app using asynchronous communication (background jobs, Kafka, webhooks), optimizing CRUD APIs by 20%.- Address Centralization: Led a team to build a scalable API for a high-traffic project, minimizing database load by 15% through Redis caching and optimized Postgres calls.- Azure Migration: Successfully migrated a complex Ruby on Rails monolith application to Azure, leveraging cloud services for efficient scaling and CI/CD. Implemented CI/CD pipelines (e.g., GitHub Workflows) for automated testing and deployment.- Plytix PIM Integration: Designed and implemented a microservices architecture for product information management, handling complex data migrations and integrations.- AI-based Delivery Slot Optimization: Developed an AI-powered solution to optimize delivery slot availability, winning a hackathon competition. Leveraged a custom-trained model on ChatGPT to analyze historical data and predict peak delivery times, considering weather conditions, events, and user instructions.- Rails 5 to 7 Upgrade: Successfully upgraded a complex Ruby on Rails monolith application from Rails 5 to Rails 7, overcoming numerous compatibility issues and ensuring smooth functionality. This challenging migration involved meticulous planning, extensive testing, and a deep understanding of Rails internals.Conclusion:Proficient in Ruby on Rails, microservices, data migration, performance optimization, cloud technologies, machine learning, and AI. Passionate about building scalable, efficient, and innovative backend systems. Show less