Hi, I'm Subhadeep Pattanayak
Backend Engineer | .NET ∙ AWS Serverless
Building and operating production systems on .NET and AWS Serverless for global brands. Strong in event-driven architecture, API integrations, and scalable microservices.
Work Experience
Software Engineer – Backend & AWS Cloud Engineer
Cognizant (KFC Spain)Sep 2021 - Present- Built and operated backend services for KFC Spain’s online ordering platform, serving 300+ stores and 10,000 orders/day, peaking at 200,000+ during high-traffic campaigns.
- Developed the “Order From The Table” dine-in feature, enabling customers to scan a QR code and order directly from their table.
- Launched Uber Eats as a new delivery channel for KFC Spain — built end-to-end order ingestion, status-sync, and store/menu mapping on AWS.
- Delivered the Catcher delivery-provider integration end-to-end on AWS (Lambda, Step Functions, API Gateway webhooks, Secrets Manager, EventBridge).
- Built the promotion and coupon engine powering KFC Spain’s marketing campaigns.
- Improved payment reliability from 95% to 99.9% (failures 5% to 0.1%), directly increasing completed orders.
- Developed real-time store-status and ordering controls used across KFC Spain stores.
- Automated store-configuration workflows, cutting operational effort when onboarding or updating stores.
- Designed and deployed production REST APIs on .NET and AWS Lambda within an event-driven microservices architecture across isolated dev and prod AWS accounts (eu-central-1).
Technical Skills
Languages
Cloud (AWS)
Backend
Databases
Tools & Concepts
Featured Projects
Meeting Assistant
Windows Desktop App (C# / .NET / LLM APIs)
A WPF desktop application that captures meeting audio in real-time. It features a live transcription engine for ongoing meetings and leverages LLM APIs to generate comprehensive meeting summaries and extract key points automatically.
Get In Touch
Currently open to new opportunities and interesting projects. Whether you have a question or just want to say hi, I'll try my best to get back to you!