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Hi, I’m Waseem Ullah Jan, a results-driven Front-End and Full-Stack developer with 2+ years of experience building scalable web applications, POS systems, and REST APIs. I excel at delivering clean, user-focused interfaces and robust back-end services, while helping Shopify merchants with Liquid-based customization and theme improvements. I’m proficient with Angular, TypeScript, JavaScript, PHP (Yii2), Node.js, and MySQL, with a strong foundation in system design, algorithms, and cloud technologies (AWS, Docker). I enjoy performance optimization, collaborating with cross-functional teams, and solving complex debugging challenges across themes, app integrations, and API flows.…Hi, I’m Waseem Ullah Jan, a results-driven Front-End and Full-Stack developer with 2+ years of experience building scalable web applications, POS systems, and REST APIs. I excel at delivering clean, user-focused interfaces and robust back-end services, while helping Shopify merchants with Liquid-based customization and theme improvements. I’m proficient with Angular, TypeScript, JavaScript, PHP (Yii2), Node.js, and MySQL, with a strong foundation in system design, algorithms, and cloud technologies (AWS, Docker). I enjoy performance optimization, collaborating with cross-functional teams, and solving complex debugging challenges across themes, app integrations, and API flows.

Waseem Ullah Jan

Front-End Developer, Back-End Developer, Full Stack Developer, +6

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Hi, I’m Waseem Ullah Jan, a results-driven Front-End and Full-Stack developer with 2+ years of experience building scalable web applications, POS systems, and REST APIs. I excel at delivering clean, user-focused interfaces and robust back-end services, while helping Shopify merchants with Liquid-based customization and theme improvements. I’m proficient with Angular, TypeScript, JavaScript, PHP (Yii2), Node.js, and MySQL, with a strong foundation in system design, algorithms, and cloud technologies (AWS, Docker). I enjoy performance optimization, collaborating with cross-functional teams, and solving complex debugging challenges across themes, app integrations, and API flows.…Hi, I’m Waseem Ullah Jan, a results-driven Front-End and Full-Stack developer with 2+ years of experience building scalable web applications, POS systems, and REST APIs. I excel at delivering clean, user-focused interfaces and robust back-end services, while helping Shopify merchants with Liquid-based customization and theme improvements. I’m proficient with Angular, TypeScript, JavaScript, PHP (Yii2), Node.js, and MySQL, with a strong foundation in system design, algorithms, and cloud technologies (AWS, Docker). I enjoy performance optimization, collaborating with cross-functional teams, and solving complex debugging challenges across themes, app integrations, and API flows.

Available to hire

Hi, I’m Waseem Ullah Jan, a results-driven Front-End and Full-Stack developer with 2+ years of experience building scalable web applications, POS systems, and REST APIs. I excel at delivering clean, user-focused interfaces and robust back-end services, while helping Shopify merchants with Liquid-based customization and theme improvements.

I’m proficient with Angular, TypeScript, JavaScript, PHP (Yii2), Node.js, and MySQL, with a strong foundation in system design, algorithms, and cloud technologies (AWS, Docker). I enjoy performance optimization, collaborating with cross-functional teams, and solving complex debugging challenges across themes, app integrations, and API flows.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Front-End Developer at SMSAMI.Inc

April 30, 2020 - June 29, 2023

● Worked on the frontend of ReadyToMuch, an application for online delivery service with Point-of-Sale (POS) integration for restaurants, pharmacies, and bakeries. ● Worked on the frontend of Point-of-Sale (POS) which is restaurants, pharmacies and Bakeries (Almost in all Pakistan) ○ Implemented new features to enhance application functionality. ○ Improved UX by optimizing server API calls to prioritize essential data for immediate display, with non-critical calls loaded in the background. Customer & Technical Support: ○ Troubleshooting, Debugging, and User Issue Resolution ○ Customer Communication, Training, Stakeholder Engagement ○ Help Desk & Support Tools (Zendesk, Help Scout, JIRA, Slack)

Back-End Developer at SMSAMI.Inc

December 1, 2018 - March 30, 2020

○ Developed and maintained RESTful APIs using Yii2 framework, PHP, and MySQL. ○ Ensured seamless API integration with front-end applications and third-party services. ○ Implemented secure authentication, role-based access control, and performance optimizations. ○ PHP, Yii2 Framework, RESTful APIs, SQL Databases ○ Authentication & Authorization (JWT, OAuth), Backend Optimization

Technical Support Specialist at TELUS Digital

January 1, 2024 - July 1, 2024

Provided L2 escalation support for Shopify/Shopify Plus merchants; delivered storefront fixes via Liquid, HTML/CSS, and JavaScript updates. Built and extended theme components (sections, snippets, templates) to improve UX and merchandising content. Debugged complex issues (Liquid includes, app script conflicts, deprecated APIs) using Chrome DevTools, theme logs, and cross-browser testing. Integrated and validated flows using Storefront/GraphQL APIs, webhooks, and payment gateways; verified payloads and regressions in Postman/Insomnia. Authored runbooks and documented recurring fixes to improve consistency and reduce ticket reopen.

Front-End Developer at SMSAMI

May 1, 2020 - June 1, 2023

Developed and maintained core front-end modules for a nationwide POS system used by restaurants, pharmacies, and retail businesses across Pakistan. Optimized API call sequencing and implemented lazy loading, reducing initial page load time by ~30% and improving overall responsiveness. Created responsive, mobile-friendly UI components, boosting user experience by 25%+ across devices. Collaborated with backend teams to ensure accurate data flow and smooth REST API integration; improved UX by prioritizing critical API calls, enabling background loading, and implementing NGXS state management. Performed debugging, code reviews, and testing to maintain high-quality standards. Provided customer support; resolved 1,000+ issues and delivered user training.

Back-End Developer at SMSAMI

December 1, 2018 - March 1, 2020

Developed and maintained scalable RESTful APIs supporting POS and delivery systems. Implemented secure authentication and authorization flows using JWT and OAuth2. Optimized SQL queries and backend logic, reducing server load by 15–20%. Ensured seamless integration between front-end applications and backend services; implemented caching to improve throughput and reduce query times.