Hafiz Rahman
@hafizrahman
Senior full-stack developer delivering scalable marketplaces, SaaS, and mobile platforms.
JapanWhat I'm looking for
I am a senior full-stack developer with eight years building marketplaces, SaaS platforms, and mobile applications that drive measurable business results.
I have led end-to-end system design and project delivery, including a multi-vendor marketplace using Node.js (NestJS), TypeScript, React, and PostgreSQL that supports 100+ vendors and thousands of products.
My work emphasizes modular architectures, API integrations, and UX-driven frontends—I created a backend plugin system reducing development time by 35%, integrated Stripe Connect to handle $500K+ monthly, and implemented Algolia search for 10,000+ products.
I collaborate closely with designers and cross-functional teams, optimize performance and uptime, and prioritize reliable, maintainable systems that improve workflows and onboarding while ensuring security and scalability.
Experience
Work history, roles, and key accomplishments
Lead Software Engineer
StoreHub
Mar 2023 - Feb 2026 (2 years 11 months)
Built a multi-vendor marketplace with NestJS, TypeScript, React and PostgreSQL supporting 100+ vendors and thousands of products; implemented a plugin system that reduced development time by 35% and integrated Stripe Connect processing $500K+ monthly.
Senior Full Stack Engineer
SAGE Group
Apr 2020 - Dec 2022 (2 years 8 months)
Led end-to-end development of HR and payment systems using Next.js, Nuxt.js and ASP.NET, improving onboarding speed by 40% and delivering a scalable SMS platform with 98%+ delivery success.
Junior Frontend Developer
SoftBank Group
Jun 2018 - Jan 2020 (1 year 7 months)
Migrated a mobile app from Bubble.io to React Native, improving performance by 45% and reducing crashes by 30%; created a Figma design system and implemented Redux Toolkit to improve maintainability by 35%.
Education
Degrees, certifications, and relevant coursework
Tottori University
Bachelor's degree, Information Science and Technology
2014 - 2018
Bachelor's degree in Information Science and Technology completed at Tottori University from 2014 to 2018.
Availability
Location
JapanAuthorized to work in
Salary expectations
Job categories
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