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Charles

@wwwwfdsafa11

Java Backend Developer and AI Application Engineer

China
English, Chinese
About me
Independent developer in Shenzhen since May 2026, with 20+ years in software development and 10+ years in architecture across banking, insurance, securities and real estate. I work on requirements, DDD, database design, microservices and integrations. Main stack: Java/Spring, React/RN, Next.js, Flutter, Go, Docker/Kubernetes. AI: Dify, LangChain/LangGraph, Claude Code and Codex. Experience includes web apps, APIs, automation and blockchain projects. I independently develop Wenxing, AIStackWatch and Tunehome. Available for remote project work; I prefer written communication.... Read more

Skills

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wwwwfdsafa11
Charles
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See my services

Help/Consultation
I will audit your ai workflow for reliability and failure risks
From$50 / projectMore details
Full Stack Web Applications
I will build a responsive website or web app starter for your business
From$75 / projectMore details

Portfolio

Work experience

Self-Employed_/ Freelancer

Independent Software Developer

Self-Employed / Freelancer

May 2026 - Present • 5 mos

Independent software developer since May 2026. Developed Telegram chatbots, e-commerce websites, copy-trading software, article generation and automated submission software, and blockchain/cryptocurrency projects. Available for remote full-time, part-time and contract opportunities in software development, systems architecture and AI applications. Independently developed and maintain Wenxing, AIStackWatch and Tunehome.

GienTech

Java Engineer

GienTech

Aug 2022 - Apr 2026 • 3 yrs 8 mos

Employer: 中电金信软件有限公司 (GienTech). Contributed to the design and development of Ping An Bank's unified reporting gateway 1.0 for fund distribution, and developed and maintained the wealth management subsidiary's transfer agency (TA) system. Contributed to LLM-based customer scoring and lead routing modules for Ping An Automotive Finance.

Hoo_Group

Development Team Lead

Hoo Group

Oct 2021 - Jun 2022 • 8 mos

Employer: 虎符(Hoo)交易所. Responsible for the design, development and maintenance of the cryptocurrency exchange settlement module, covering asset movements, fund freezing and unfreezing, fees and transaction ledger entries. Used transactions, idempotency, concurrency control and exception compensation to maintain accounting correctness. Participated in reconciliation and settlement exception handling.