Toronto, Canada

Hi, I'm Saif Ur Rehman

Senior Backend Engineer

Building scalable AI-powered systems and cloud-native applications

Saif Ur Rehman - Senior Backend Engineer
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Years Experience

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Featured Projects

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Technologies

Available for Opportunities

About Me

I'm a Senior Backend Engineer specializing in AI-powered systems and cloud architecture. Over the past 3+ years at 10Pearls, I've built production systems that process 130+ documents daily using LLMs, reducing operational costs by $4,000/month.

I'm passionate about building intelligent systems that solve real problems. My recent focus has been on RAG architectures, microservices, and cloud-native applications on GCP and AWS.

Currently based in Toronto and open to full-time opportunities in AI/ML engineering and backend development. I bring a strong foundation in Python, FastAPI, and modern cloud platforms, combined with hands-on experience in building scalable, production-ready systems.

90%

Backend Development

85%

AI/ML Integration

88%

Cloud Architecture

87%

Microservices

Tech Stack

Languages

PythonTypeScriptJavaScriptSQL

Backend

FastAPIFlaskNode.jsREST APIsGraphQL

AI/ML

OpenAI GPT-4Google GeminiLangChainRAGChromaDBVector DBsNLP

Cloud & DevOps

AWS (Lambda, S3, Cognito, CloudWatch)GCP (Cloud Run, BigQuery, Pub/Sub)DockerKubernetesGitHub ActionsTerraform

Databases

PostgreSQLMongoDBRedisFirebaseChromaDB

Tools

GitPostmanSwaggerJiraVS Code

Featured Projects

PropInsight AI - Real Estate Intelligence Platform

Full-Stack

Full-stack real estate analysis platform aggregating property data from 7+ sources across US and Canada with AI-powered insights, valuations, and market analysis.

Next.js 14TypeScriptTailwind CSSFastAPIPythonRedisFirebaseGoogle Gemini AIPlaywrightDocker

Smart Expense Tracker with Receipt OCR

AI/ML

AI-powered expense tracking system that uses OCR to automatically extract data from receipt images, categorize expenses, and generate spending reports with budget alerts.

PythonAWS LambdaAPI GatewayS3TextractComprehendDynamoDBSESCognitoSAM

Pharmacy Microservices Platform

Microservices

Production-ready microservices architecture for pharmacy operations with real-time inventory management, prescription processing, and analytics dashboard.

PythonFastAPIPostgreSQLDockerKubernetesGCP Cloud RunPub/SubRedis

Work Experience

January 2024 - October 2025

Senior Software Engineer

10Pearls
Remote
  • Built AI-powered document analysis system processing 130+ appraisals daily using multi-model architecture
  • Designed and implemented GPT-4 and YOLO-based data extraction pipeline, reducing manual processing time by 70%
  • Achieved $4,000/month in operational cost savings through intelligent automation and optimization
  • Led enterprise API integration platform connecting 5+ third-party services with robust error handling
  • Architected scalable microservices on GCP with automated deployment pipelines
  • Mentored junior developers and conducted code reviews to maintain high code quality standards
PythonFastAPIOpenAI GPT-4YOLOGCP
January 2022 - December 2023

Software Engineer

10Pearls
Remote
  • Developed real-time IoT backend processing 10,000+ sensor readings per minute with sub-second latency
  • Built WebSocket-based live collaboration features for enterprise platform serving 1000+ concurrent users
  • Implemented serverless architectures on AWS Lambda reducing infrastructure costs by 40%
  • Designed and deployed RESTful APIs with comprehensive documentation and testing
  • Optimized database queries and implemented caching strategies improving response times by 60%
  • Collaborated with cross-functional teams to deliver features on time and within scope
PythonFlaskFastAPIAWS LambdaPostgreSQL

What People Say

Recommendations from clients and colleagues I've worked with

"I've directly worked with Saif for a number of years now and he encompasses exactly what you look for in a high performer. He raises his hand to take on work, deeply researches and understands things, but also is not afraid to take calculated risks. We ended up calling him 'Boss' around our projects. When we needed something crazy, we called the boss. If you need someone that has experience with taking products from 0 to 1, Saif is the one you want on your team."

Miles Dixon

VP of Product Development

Nationwide Appraisal Network

September 2025

"I had the pleasure of working with Saif as Lead Product Manager at Bboxx where we were delivering integrations and complex features for an IoT system built on a microservices platform to manage and control thousands of devices. He stood out for his technical skills, clear communication, and consistent motivation. I'd recommend him as a nice person to work with and someone that can work hard to deliver."

Tiago Carvalho

Product Manager

Bboxx

November 2025

"I had the privilege of working with Saif on two major projects, where he consistently stood out as a backend developer of exceptional skill and reliability. He mastered complex IoT integrations, delivering scalable backend services, and drove AI-powered innovations including situationally restricted words detection and an AI-based appraisal validation system. Saif combines deep technical expertise with remarkable problem-solving ability, takes full ownership of his work, and adapts seamlessly to new challenges. Truly the teammate any team would be lucky to have."

Ali Kazmi

Associate Director Engineering

10Pearls

November 2025

"I've had the privilege of managing Saif at 10Pearls, and he has consistently exceeded expectations. His technical expertise and strong problem-solving skills have been instrumental in delivering high-quality solutions on time. Saif stands out for his proactive communication, eagerness to learn, and ability to collaborate effectively across teams. He takes full ownership of his work, adapts quickly to new challenges, and often contributes valuable insights during project discussions."

Muzzamil Pirani

Senior Project Manager

10Pearls

October 2025

"I had the pleasure of working with Saif for over two and a half years, and he quickly became my go-to person for virtually everything. What always set Saif apart was his rare combination of deep technical expertise and absolute dependability. Whether we needed a critical hot fix implemented flawlessly under pressure or someone to confidently lead a high-stakes call with a client, my trust was always with him. Saif is the teammate every manager and colleague wishes for: highly capable, incredibly reliable, and a true leader in execution."

Waleed Khan

Staff Software Engineer

10Pearls

October 2025

"Saif ur Rehman is an outstanding professional whom I had the privilege to mentor. His development within such a short span has been extraordinary. I have repeatedly conveyed to the senior leadership that, given his skills, he merits a more senior role—a view with which they are in full agreement."

Wajahat Ahmed

Staff Software Engineer

10Pearls

August 2025

Let's Work Together

I'm currently open to new opportunities. Whether you have a project in mind or just want to connect, feel free to reach out.