
Shahzaman S.
Senior PHP Full Stack Engineer Serving 1M Users and 500 Clinics in Japan
Habilidades

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Porfolio
Experiencia laboral
Senior Full Stack Engineer
Jstay • Tiempo completo
Jul 2025 - Present • 1 yr 1 mo
Help deliver and modernize a multi-tenant Laravel/Vue.js healthcare platform used by about 500 clinics in Japan. Improve code quality through reviews with Japanese engineers, apply OOP and SOLID practices, strengthen OAuth 2.1 and tenant security, and support reliable production releases. Delivered a zero-loss migration of 131 tables, chat records, and terabytes of media using deterministic identifiers, per-clinic transactions, retries, and 30+ integrity checks, preserving service continuity and data accuracy.
Full Stack Developer & Team Lead
Enzipe • Tiempo completo
Sep 2023 - Jul 2025 • 1 yr 10 mos
Worked on AI-powered platforms serving 1M+ monthly users, including text processing tools, OCR solutions, and content optimization systems used by students, writers, and professionals. I also built business tools like a complete POS system with inventory and billing. My focus was backend architecture, database optimization, payment integrations, and keeping everything running smoothly under heavy traffic. • Developed and maintained Summarizer.org, a platform with 30+ AI-powered text tools • Scaled platform to 1M+ monthly users • Managed Imagetotext.io, an OCR tool for extracting text from images and PDFs • Built Minifier.org, a web asset optimization tool that ranks on the first page of Google • Built a complete Point of Sale (POS) system with inventory management and billing • Implemented subscription-based payment systems using Stripe and PayPal • Reduced API response times through optimization and caching • Mentored junior developers through code reviews and technical guidance
Senior Laravel Developer
TechTrack • Tiempo completo
Dec 2022 - Sep 2023 • 9 mos
Built SaaS platforms and AI-integrated web applications from initial design to production. Worked on multi-tenant systems, payment integrations, and real-time features across different business domains. Led backend development while also contributing to frontend work using Vue.js and Inertia.js. This role involved close collaboration with designers and junior developers through code reviews and pair programming. • Designed and built Matgarli, a multi-tenant SaaS platform for order and product management • Implemented role-based access control and payment integrations • Led backend development for Taam AI, an AI platform combining text generation, image analysis, and a multilingual chatbot • Built real-time features using WebSockets • Designed clean REST APIs for frontend integration • Mentored junior developers and improved overall code quality