Full-Stack Engineer | SaaS Apps, API Integrations & Application Modernization

I build and improve SaaS applications, business portals, and integrations that automate manual workflows. I help teams add features, resolve performance bottlenecks, and modernize existing systems.

My experience includes software engineering at i2c Inc. and PureLogics, alongside freelance work for international clients.

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Optimized the React frontend of PureLogics' internal Test Management System through code splitting, dependency optimization, and asset management.

• Reduced the frontend bundle from 1.89 MB to 800 KB.
• Reduced Bitbucket build duration from 30 minutes to 5 minutes.

Built a multi-tenant middleware platform connecting Salla and Zid stores with EZ PIN and LikeCard gift-card providers. Implemented webhook-driven fulfillment, product mapping, profitability checks, provider selection with fallback, and tenant-level data isolation.

Built with: Next.js, TypeScript, MySQL.

Built a Node.js/Express service that receives verification webhooks, retrieves session data and media through Veriff APIs, and uploads records to SharePoint.

View the source code

• Modernized selected C-Agent modules by migrating Struts/JSP interfaces to React and integrating them with Spring Boot and Hibernate services.
• Moved a heavyweight JVM cache to Dockerized Redis and separated cache refresh into a dedicated service, reducing application startup overhead.
• Built a concurrent batch-processing pipeline for 2.2M+ financial records, with fetching, processing, and persistence stages connected through queues and batched database operations.

Integrated monthly and yearly PayPal subscriptions into a Laravel application to automate course enrollment after successful payment.

These examples describe my implementation contributions. Some employer and client source code is private; my portfolio provides additional project context.

• SaaS development: Customer dashboards, admin interfaces, role-based access, and subscription workflows.
• API integrations: Payments, e-commerce platforms, verification services, webhooks, and background automation.
• Maintenance and modernization: Bug fixes, new features, refactoring, and updates to existing JavaScript, PHP, and Java applications.
• Performance optimization: Frontend bundles, build times, database access, and caching.

I clarify the scope and acceptance criteria, break work into reviewable milestones, and communicate progress and blockers early. I prioritize maintainable code, verify critical workflows, and document setup and significant implementation decisions.

BS Software Engineering — NUST · Lahore, Pakistan · UTC+5

Have a feature, integration, or bottleneck to work on? Send me your project details on Upwork, including your priorities and preferred timeline.