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Shahid User

@shahiduser5

Senior Full Stack Engineer at TechXpert who cut p95 latency 44% and built a LangGraph RAG pipeline that saves 20 hours weekly.

Pakistan

Message

At TechXpert, I rebuilt transaction services across Node.js, NestJS, Django, and Kafka, reducing p95 latency by 44%. I also built a LangGraph RAG pipeline using Claude and GPT-4o that saves catalogers 20 hours every week.

At Zapta, I developed transactional APIs and operational dashboards, and automated ticket capture with Python OCR bots and scikit-learn ETA models. Earlier, at Zeroz AI, I wrote public API services and improved page render time from 3.4 seconds to 1.1 seconds.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

TechXpert

Nov 2023 - Present (2 years 11 months)

Rebuilt core transaction services in Node.js, NestJS, and Django over Kafka events, reducing p95 latency by 44%. Modernized legacy interfaces in Next.js and TypeScript, and built a LangGraph RAG pipeline on Claude and GPT-4o.

NodeJS NestJS Django Kafka Next.js TypeScript MongoDB Mongoose LangGraph Claude GPT 4o Pinecone AWS ECS Bedrock DocumentDB Terraform Helm GitHub Actions Docker OpenTelemetry Jest Playwright Cypress

Senior Software Engineer

Zapta

Apr 2021 - Nov 2023 (2 years 7 months)

Developed Express.js and Python Django services behind transactional APIs handling 40K+ records per day. Created React and Redux dashboards over Socket.IO streams, reducing clicks per workflow by 30%.

ExpressJS Django React Redux Socket.IO PostgreSQL MongoDB AWS Lambda Amazon SQS Docker CircleCi Datadog Jest Mocha Chai

Software Engineer

Zeroz AI

Aug 2018 - Mar 2021 (2 years 7 months)

Wrote Node.js and Ruby on Rails services behind public APIs serving 1.5M monthly requests at peak traffic. Improved MySQL indexing and layered Redis caching, shortening page render time from 3.4 seconds to 1.1s.