Haiyang C.
Senior Java Engineer | 10+ Yrs | Backend, SQL, MQ, JVM, APIs, Frontend
I'm a Senior Java Developer with over 10 years of professional experience in software development, specializing in Java backend development, enterprise applications, databases, and middleware. I have extensive experience in the banking, finance, and insurance industries, developing and maintaining large-scale systems with high performance and reliability. My technical skills include Java, backend development, RESTful APIs, SQL, database design and optimization, message queues, JVM tuning, multithreading, high-concurrency systems, and frontend development. I have also worked on system architecture, performance optimization, bug fixing, and integration with existing applications. I focus on delivering reliable, efficient, and maintainable solutions. I'm confident in handling complex technical challenges and look forward to helping you build or improve your applications.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $10k
Billed in all: $28,056$28k
$10k in the last 6 months
Earnings, last 30 days
Skill rankings: Top 5% in Video Design
Ranked by MRR among everyone on Upwork with the skill.
- #8WeChat86 freelancers · 🇨🇳 #8Top 9%🇨🇳#8 of 66
- #63Video Design1,323 freelancers · 🇨🇳 #1Top 5%🇨🇳#1 of 5
- #170Video Ad2,818 freelancers · 🇨🇳 #1Top 6%🇨🇳#1 of 8
- #378Product Development3,593 freelancers · 🇨🇳 #12Top 11%🇨🇳#12 of 84
- #624Java8,313 freelancers · 🇨🇳 #6Top 8%🇨🇳#6 of 80
- #721API Development6,848 freelancers · 🇨🇳 #2Top 11%🇨🇳#2 of 11
- #755AI Chatbot6,841 freelancers · 🇨🇳 #4Top 11%🇨🇳#4 of 18
- #887Web Application9,341 freelancers · 🇨🇳 #4Top 9%🇨🇳#4 of 32