Open to opportunities

Hassan Zaib Hayat

@hassanzaibhayat

Senior backend & data engineer building scalable APIs, microservices, and production data pipelines on AWS and open source.

Pakistan

Message

What I'm looking for

I want to build secure, high-performance backend and data systems—shipping scalable APIs, optimized pipelines, and reliable CI/CD. I’m happiest leading quality and mentoring while working on real-time, analytics-driven products.

I’m a Senior Backend & Data Engineer with 5+ years of experience designing scalable APIs, microservices, and end-to-end data pipelines. I’m AWS Certified Data Engineer – Associate (DEA-C01), and I’ve built production-grade analytics that process millions of records using Hadoop, Spark, Kafka, and Airflow—backed by practical API and performance engineering in Django.

On the backend side, I optimize Django ORM queries, eliminate N+1 patterns, and deliver systems serving 1,000+ concurrent users across large datasets. I also lead with quality—CI/CD, code reviews, mentorship, and HIPAA-compliant healthcare backend design—while contributing to open-source packages on PyPI and GitHub.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer (Backend Lead)

Current

Purelogics

Aug 2025 - Present (11 months)

Architected HIPAA-compliant healthcare backend systems using Django REST Framework and GraphQL, ensuring secure handling of protected health information (PHI). Led a backend sub-team and optimized Django ORM queries by eliminating N+1 patterns to reduce execution time for critical healthcare data pipelines.

Django Django REST Framework GraphQL HIPAA compliance Query Optimization N+1 Query Elimination Code Review Mentoring

Senior Full Stack Software Engineer

Arbisoft

May 2021 - Aug 2025 (4 years 3 months)

Delivered 17 of 23+ features end-to-end across API design, database schema, and deployment, with strong technical ownership for a core product. Built high-throughput Django/DRF REST APIs and integrated Stripe, Spotify, and Sentry while managing CI/CD and AWS infrastructure.

Freelance Software Developer

Remote

Jan 2018 - Jan 2024 (6 years)

Delivered full-stack web applications for international clients, specializing in Python/Django backend development, database design, and API integration.

Python Django Backend Development Database Design API Integration Full Stack Web Development

Research Assistant

Cloud Lab, PUCIT

Oct 2019 - Mar 2021 (1 year 5 months)

Designed experiments that increased Hyperledger Fabric transaction throughput by 3–4x through configuration optimization, and authored a published paper on blockchain performance optimization. Built blockchain prototypes and simulation environments to evaluate consensus algorithms and smart contract performance under varying network conditions.

Hyperledger Fabric Experiment Design Docker Consensus Algorithms Smart Contract Performance Configuration

Education

Degrees, certifications, and relevant coursework

Punjab University College of Information Technology (PUCIT)

M.Phil. in Computer Science, Computer Science

Grade: CGPA: 3.33/4.0

Completed an M.Phil. in Computer Science at PUCIT with a CGPA of 3.33/4.0. Research focused on blockchain performance optimization using Hyperledger Fabric.