I'm a backend and full-stack engineer with 4+ years of experience building secure, high-performance web applications across real estate, healthcare, and e-commerce. I focus on clean code, scalable architecture, performance optimization, and API-driven development, delivering production-ready solutions with a focus on reliability and security. I thrive in remote, cross-functional teams and have a track record of boosting system speed and team efficiency through query tuning and workflow automation. I enjoy collaborating with design, product, and QA to ship robust software and measurable results.…

Zia Ur Rehman

I'm a backend and full-stack engineer with 4+ years of experience building secure, high-performance web applications across real estate, healthcare, and e-commerce. I focus on clean code, scalable architecture, performance optimization, and API-driven development, delivering production-ready solutions with a focus on reliability and security. I thrive in remote, cross-functional teams and have a track record of boosting system speed and team efficiency through query tuning and workflow automation. I enjoy collaborating with design, product, and QA to ship robust software and measurable results.…

Available to hire

I’m a backend and full-stack engineer with 4+ years of experience building secure, high-performance web applications across real estate, healthcare, and e-commerce. I focus on clean code, scalable architecture, performance optimization, and API-driven development, delivering production-ready solutions with a focus on reliability and security. I thrive in remote, cross-functional teams and have a track record of boosting system speed and team efficiency through query tuning and workflow automation. I enjoy collaborating with design, product, and QA to ship robust software and measurable results.

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Skills

Experience Level

Ruby on Rails
Expert
Ruby
Expert
PostgreSQL
Expert
SQL
Expert
GitHub
Expert
Redis
Expert
MySQL
Expert
Stripe
Expert
Shopify
Expert
Node.js
Expert
JavaScript
Expert
Docker
Expert
AWS
Expert
Jira
Expert
HTML5
Expert
GraphQL
Expert
Python
Intermediate
CSS
Intermediate
Kubernetes
Intermediate
React JS
Intermediate
Django
Intermediate
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Language

English
Fluent
Urdu
Fluent

Work Experience

Full Stack Software Engineer at Intellirent
December 31, 2024 - July 23, 2025
Refactored legacy Ruby on Rails architecture using advanced metaprogramming and DRY principles, delivering a 33% performance gain and lowering server costs. Engineered containerized microservices with AWS Lambda and Docker, cutting infrastructure costs by 27% while enhancing scalability and deployment speed. Integrated third-party REST APIs (Stripe, Experian) to fully automate applicant screening, reducing manual workload by 30%. Restructured relational schemas with ActiveRecord, resolving memory issues (23% improvement) while ensuring ACID compliance. Enhanced frontend performance by 15% via asset bundling and font caching. Reduced memory usage by 77% by embedding PDFs, minimizing external dependencies. Accelerated debugging by 50% using structured logging and real-time monitoring tools. Wrote unit tests using RSpec for critical modules, improving test coverage and reducing production bugs in legacy refactored components. Delivered features in cross-functional Agile teams, collaborati
Software Engineer at Biomark
January 1, 2023 - July 23, 2025
Reduced codebase size by 12% using hash-based metaprogramming in Ruby on Rails, achieving O(1) time complexity in key workflows. Developed HIPAA-compliant pipelines using HL7 APIs, enabling secure healthcare data exchange and reducing manual processing by 47%. Automated onboarding workflows and designed modular healthcare microservices, boosting team productivity by 70% and developer efficiency by 30%. Contributed to secure data exchange architecture using HL7 protocols within Agile sprints, maintaining HIPAA compliance and delivery velocity.
Software Engineer at Saas LTV Growth
June 1, 2022 - July 23, 2025
Migrated REST endpoints to Shopify GraphQL API and implemented CI/CD pipelines via GitHub Actions, reducing server load by 36% and accelerating release cycles. Optimized background job queues with Redis batch processing, eliminating N+1 query issues and improving resource use by 43%. Implemented product customization features (engraving, swatches, image uploads), increasing customer engagement by 37% and boosting merchant revenue. Reduced LCP by 72% via Redis caching and backend query optimization in MVC architecture. Implemented Git-based version control workflows for team collaboration, including pull requests, code reviews, and continuous integration.
Full-Stack Engineer at Ecolink
December 1, 2024 - Present
Built real-time communication workflows for insurance agencies by integrating Action Cable, WebSockets, and Turbo Streams to enable live call routing, chat, SMS, and compliance logging. Designed scalable Rails-based architecture supporting integrations with RingCentral and AMS360, delivering responsive UX with Turbo Frames and Turbo Streams to improve accessibility and engagement. Collaborated in cross-functional Agile teams across design, product, and QA to meet sprint goals. Implemented an automation-friendly reporting Slack bot that generates bi-weekly PDFs and CSVs, reducing manual reporting effort by 80%.
Full-Stack Engineer at Ecolink
December 1, 2024 - Present
Built multi-tenant real-time communication workflows for insurance agencies by integrating Action Cable, WebSockets, and Turbo Streams; developed Rails-based architecture enabling live call routing, chat, SMS, and compliance logging. Implemented scalable integrations with RingCentral and AMS360. Delivered a responsive UX using Hotwire (Turbo Frames + Turbo Streams) to improve accessibility and engagement. Worked in cross-functional Agile teams with design, product, and QA. Integrated a Slack bot to generate bi-weekly user reports in PDF/CSV, reducing manual reporting effort by 80%.
Full-Stack Engineer at Intellirent
December 31, 2024 - October 16, 2025
Refactored legacy Rails architecture using advanced metaprogramming and DRY principles, delivering a 33% performance gain and lowering server costs. Automated applicant screening with REST API integrations (Stripe, Experian), reducing manual work by 30%. Restructured relational schemas with ActiveRecord, resolving memory issues (23% improvement) while ensuring ACID. Accelerated debugging by 50% using structured logging and real-time monitoring tools (Papertrail, Airbrake). Wrote unit tests using RSpec for critical modules, improving test coverage and reducing production bugs in legacy refactored components.
Software Engineer at Biomark
January 31, 2023 - October 16, 2025
Reduced codebase size by 12% using hash-based metaprogramming in Ruby on Rails, achieving O(1) time complexity in key workflows. Developed HIPAA-compliant pipelines using HL7 APIs, enabling secure healthcare data exchange and reducing manual processing by 47%. Automated onboarding workflows and designed modular healthcare microservices, boosting team productivity by 70% and developer efficiency by 30%.
Software Engineer at Saas LTV Growth
June 30, 2022 - October 16, 2025
Migrated REST endpoints to Shopify GraphQL API and implemented CI/CD pipelines via GitHub Actions, reducing server load by 36% and accelerating release cycles. Optimized background job queues with Redis batch processing, eliminating N+1 query issues and improving resource use by 43%. Implemented product customization features (engraving, swatches, image uploads), increasing customer engagement by 37% and boosting merchant revenue. Reduced LCP by 72% via Redis caching and backend query optimization in MVC architecture.

Education

Bachelor of Science at Namal College - An Associate College of University of Bradford, UK
January 1, 2015 - December 31, 2019
Bachelor of Science at Namal College - An Associate College of University of Bradford, UK
January 11, 2030 - October 16, 2025

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Real Estate & Construction, Healthcare, Retail, Professional Services
    paper Product Customer ( SaaS, E-commerce)

    Build scalable e-commerce applications and tools, with a focus on Shopify APIs, data performance optimization, and user customization features. Collaborate on back-end and front-end enhancements to drive user engagement and merchant success.

    paper Biomark (HealthCare)

    Contribute to the development of healthcare data platforms ensuring HIPAA compliance. Build secure and scalable APIs to integrate with third-party healthcare systems. Participate in Agile ceremonies and collaborate with QA and product teams to ensure smooth release cycles.

    paper Real Estate & Rental Marketing

    Responsible for designing, building, and maintaining web applications using Ruby on Rails and modern front-end frameworks. Work closely with product managers, designers, and cross-functional teams to enhance application performance, ensure scalability, and implement third-party integrations. Drive architectural improvements and maintain high code quality using best practices.