Zain-Ul-Mustafa

Team Lead and Senior Software Engineer

Integritech • Full time

Jul 2024 - Feb 2026 • 1 yr 7 mos

Architected AI-powered automation systems using AWS Bedrock with contextual Knowledge Base integration.  Designed secure bi-directional CRM and field-service integrations using REST APIs and webhook-driven architecture.  Built custom GoHighLevel applications with automated 22-hour token regeneration system ensuring uninterrupted API operations.  Implemented PHPUnit-driven testing standards improving code reliability and reducing production defects.  Led remote development team and aligned technical roadmap with business objectives and scalable SaaS architecture principles.

Senior Software Engineer

Carpediem • Full time

Jan 2022 - Jul 2024 • 2 yrs 6 mos

 Led full lifecycle development of scalable SaaS applications deployed in production environments.  Engineered optimized API ecosystems improving system response performance and integration efficiency.  Introduced Test-Driven Development (TDD) and structured feature testing across engineering workflows.  Delivered high-availability systems through secure cloud deployment and collaborative remote execution.

Team Lead PHP Developer

Symits • Full time

May 2017 - Jan 2022 • 4 yrs 8 mos

Developed enterprise-grade RESTful APIs and modernized legacy system architectures.  Managed development team while enforcing clean code standards and structured testing practices.  Improved application maintainability and scalability through systematic refactoring initiatives.