I’m a backend-focused full-stack engineer with 5+ years of experience building scalable, reliable, and well-structured systems for startups and growing businesses. My core strength lies in backend development—designing clean architectures, robust APIs, and efficient data models using Python (FastAPI / Django), along with SQL/NoSQL databases such as PostgreSQL, MySQL, and MongoDB. While backend engineering is my primary focus, I’m equally comfortable delivering complete end-to-end solutions. I have hands-on experience with Vue.js, React, and React Native, allowing me to build full-stack applications, admin dashboards, mobile app MVPs, and custom client-facing features when needed. I’ve delivered projects including CRM platforms, streaming service backends, payment & identity integrations, workflow automation systems, mobile app backends, and fintech modules such as anti-fraud and risk assessment pipelines. I take ownership from system design → implementation → deployment, using tools like Docker, AWS, and GCP to ensure each solution is production-ready. I rely heavily on AI-assisted development tools such as Cursor, GitHub Copilot, ChatGPT, Claude, MCP, and n8n to accelerate prototyping, simplify complex implementations, and automate repetitive work—helping clients get results faster without compromising quality. If you need an engineer who can understand your business logic, design a solid backend, integrate with external services, and deliver complete full-stack or mobile-ready solutions, I’d be happy to help bring your product to life.

Frankie Xu (Yun Fu Hsu)

I’m a backend-focused full-stack engineer with 5+ years of experience building scalable, reliable, and well-structured systems for startups and growing businesses. My core strength lies in backend development—designing clean architectures, robust APIs, and efficient data models using Python (FastAPI / Django), along with SQL/NoSQL databases such as PostgreSQL, MySQL, and MongoDB. While backend engineering is my primary focus, I’m equally comfortable delivering complete end-to-end solutions. I have hands-on experience with Vue.js, React, and React Native, allowing me to build full-stack applications, admin dashboards, mobile app MVPs, and custom client-facing features when needed. I’ve delivered projects including CRM platforms, streaming service backends, payment & identity integrations, workflow automation systems, mobile app backends, and fintech modules such as anti-fraud and risk assessment pipelines. I take ownership from system design → implementation → deployment, using tools like Docker, AWS, and GCP to ensure each solution is production-ready. I rely heavily on AI-assisted development tools such as Cursor, GitHub Copilot, ChatGPT, Claude, MCP, and n8n to accelerate prototyping, simplify complex implementations, and automate repetitive work—helping clients get results faster without compromising quality. If you need an engineer who can understand your business logic, design a solid backend, integrate with external services, and deliver complete full-stack or mobile-ready solutions, I’d be happy to help bring your product to life.

Available to hire

I’m a backend-focused full-stack engineer with 5+ years of experience building scalable, reliable, and well-structured systems for startups and growing businesses. My core strength lies in backend development—designing clean architectures, robust APIs, and efficient data models using Python (FastAPI / Django), along with SQL/NoSQL databases such as PostgreSQL, MySQL, and MongoDB.

While backend engineering is my primary focus, I’m equally comfortable delivering complete end-to-end solutions. I have hands-on experience with Vue.js, React, and React Native, allowing me to build full-stack applications, admin dashboards, mobile app MVPs, and custom client-facing features when needed.

I’ve delivered projects including CRM platforms, streaming service backends, payment & identity integrations, workflow automation systems, mobile app backends, and fintech modules such as anti-fraud and risk assessment pipelines. I take ownership from system design → implementation → deployment, using tools like Docker, AWS, and GCP to ensure each solution is production-ready.

I rely heavily on AI-assisted development tools such as Cursor, GitHub Copilot, ChatGPT, Claude, MCP, and n8n to accelerate prototyping, simplify complex implementations, and automate repetitive work—helping clients get results faster without compromising quality.

If you need an engineer who can understand your business logic, design a solid backend, integrate with external services, and deliver complete full-stack or mobile-ready solutions, I’d be happy to help bring your product to life.

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Experience Level

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Expert
Expert
Expert
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Expert
Expert
Intermediate
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Language

English
Advanced
Chinese
Fluent

Work Experience

Founder / Software Engineer at Coding Monster Studio
January 1, 2024 - November 24, 2025
Delivered full-stack solutions (call-center CRM, streaming platform, dating app) using FastAPI, Django, Vue.js and React Native. Designed backend architecture, authentication, and database schemas; improved deployment reliability and reduced infrastructure costs by ~20%. Led 1–3 engineers per project, handling requirements, system design, code review, and sprint planning. Built integrations with telecom APIs, payment gateways, and third-party identity services. Completed multiple remote client projects (TW/US) with >95% on-time delivery.
Tech Lead at Flux Fintech
December 1, 2023 - December 1, 2023
Led an 8-person engineering + PM team, overseeing system roadmap, architecture, and cloud infrastructure. Migrated legacy CodeIgniter monolith to a microservice-based architecture, improving overall system performance by ~30% and reducing downtime by ~50%. Drove migration from Qt to React Native, resolving hiring bottlenecks and eliminating 70%+ manpower constraints for mobile development. Guided authentication tech updates and contributed to ISO 27001 certification.
Backend Developer at Flux Fintech
June 1, 2022 - June 1, 2022
Developed core backend modules for the P2P lending platform, including accounting ERP, loan workflows, and user management. Implemented OCR identity verification, student data crawlers, and Instagram crawlers, reducing manual workloads for risk-control teams by 50%. Implemented anti-fraud features to detect high-risk relation clusters and prevent potential defaults. Enhanced monitoring and alerting, reducing monthly downtime by 30%. Integrated external APIs (banks, telecom, and third-party identity services).
Intern at Coding Bar
November 1, 2019 - November 1, 2019
Designed programming curricula and taught classes for students from elementary to university levels. Grew Medium audience to 1300+ followers through technical writing.

Education

B.S. at National Chengchi University
January 1, 2016 - January 1, 2020

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Professional Services, Media & Entertainment

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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