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Yoosin Paddy
@paddyyoosin
Full Stack Mobile and Backend Developer Android Flutter Laravel Spring Boot
Canada
English
About me
I’m a Full-Stack Mobile and Backend Developer specializing in fixing, scaling, and launching modern applications, including AI-generated apps and SaaS products.
Many businesses today build apps using tools like Cursor, Firebase, Supabase, or Replit, but get stuck with deployment, backend integration, authentication, bugs, or production issues.
I help turn unstable or incomplete projects into reliable, production-ready systems.
Tech stack: Kotlin, Java, Flutter, Spring Boot, Laravel, Firebase, MySQL, JavaScript, and Vue.js.
Skills
Yoosin Paddy
Offline •
See my services
Cross-Platform Development
I will develop an android app or will be your mobile app developer
Mobile App Bug Fixes
I will fix an issue in your mobile application android java kotlin dart flutter
Work experience
Software Engineer
ACV Auctions • Full-time
Aug 2025 - Present • 9 mos
Develop and maintain backend services and APIs used by large-scale auction platforms. Work on distributed systems, microservices, and backend infrastructure supporting production environments. Responsibilities include building new backend features, improving system performance, debugging production issues, and collaborating with product and engineering teams to deliver reliable software. Technologies used include Java, Kotlin, Spring Boot, microservices architecture, REST APIs, databases, and cloud infrastructure.
Java Developer III
DoorDash • Full-time
Oct 2024 - Jun 2025 • 8 mos
Worked on backend services for the Dasher application, including promotion and incentive systems that improved peak-hour order fulfillment. Contributed to Java/Kotlin microservices using Spring Boot and Micronaut, supporting scalable production systems and distributed backend workflows. Responsibilities included maintaining backend APIs, debugging production issues, improving reliability, and collaborating across teams to deliver new features. Technologies used: Java, Kotlin, Spring Boot, Micronaut, microservices, REST APIs, Spinnaker, Scalyr, CRDB, distributed systems.
138 Reviews
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Rating Breakdown
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1-5 out of 138 Reviews
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moe2338
Argentina
It was a pleasure working with Yoosin, he was very prompt and friendly. I look forward to working with him again.
Helpful?
ileenjemutai
Canada
Helpful?
wesamhija
Repeat Client
Israel
The work was great
Helpful?
wesamhija
Repeat Client
Israel
Helpful?
arcadmnc
Repeat Client
United Kingdom
Helpful?
