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Syed Jarar Haider

@syedjararhaider

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Senior Full Stack Developer specializing in Ruby on Rails, Python, and modern JavaScript.

Pakistan

Message

What I'm looking for

I seek senior full-stack roles where I can design scalable systems, lead teams, use cloud-native tools, and drive CI/CD, testing, and performance improvements.

I am a Senior Full Stack Developer with 5+ years of experience building scalable, high-performance applications using Ruby on Rails, Python (Django, FastAPI) and modern JavaScript frameworks like React and Next.js. I focus on robust cloud solutions (AWS, GCP), implement Agile practices, and drive quality through TDD/BDD and comprehensive automated testing.

Throughout my career I have architected microservices and full-stack applications, led platform overhauls that reduced infrastructure costs by 40%, improved response times by 50%, and implemented CI/CD pipelines that cut deployment time by 30%. I mentor teams, integrate third-party APIs, and prioritize performance, reliability and secure compliance for domains including fintech, healthcare and e-commerce.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Devsinc

Feb 2022 - Present (3 years 8 months)

Led development of scalable backend APIs and a full-stack Rails application, driving a 50% improvement in response times and reducing infrastructure costs by 40% through an architecture overhaul.

Ruby on Rails Python Microservices AWS PostgreSQL CI CD Jenkins Performance Optimization API Integration

Full Stack Developer

Remote Contractor

Jan 2020 - Feb 2022 (2 years 1 month)

Designed and implemented scalable Django/Flask web applications, increased user engagement by 30%, and migrated legacy systems to microservices reducing code complexity by 35%.