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I am an experienced Java developer with 6+ years in the communication SaaS sector, skilled in SQL optimization and architecture design. I have proven expertise in managing high concurrency systems, with a strong focus on efficiency and innovation. I have consistently delivered robust technical solutions aligned with business goals, and I thrive on helping customers through troubleshooting, training, and clear documentation. I enjoy building scalable backend systems, optimizing databases, and integrating modern tooling to accelerate delivery and product quality.…I am an experienced Java developer with 6+ years in the communication SaaS sector, skilled in SQL optimization and architecture design. I have proven expertise in managing high concurrency systems, with a strong focus on efficiency and innovation. I have consistently delivered robust technical solutions aligned with business goals, and I thrive on helping customers through troubleshooting, training, and clear documentation. I enjoy building scalable backend systems, optimizing databases, and integrating modern tooling to accelerate delivery and product quality.

Chao Li Xian

Full Stack Developer, Back-End Developer, Front-End Developer, +4

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I am an experienced Java developer with 6+ years in the communication SaaS sector, skilled in SQL optimization and architecture design. I have proven expertise in managing high concurrency systems, with a strong focus on efficiency and innovation. I have consistently delivered robust technical solutions aligned with business goals, and I thrive on helping customers through troubleshooting, training, and clear documentation. I enjoy building scalable backend systems, optimizing databases, and integrating modern tooling to accelerate delivery and product quality.…I am an experienced Java developer with 6+ years in the communication SaaS sector, skilled in SQL optimization and architecture design. I have proven expertise in managing high concurrency systems, with a strong focus on efficiency and innovation. I have consistently delivered robust technical solutions aligned with business goals, and I thrive on helping customers through troubleshooting, training, and clear documentation. I enjoy building scalable backend systems, optimizing databases, and integrating modern tooling to accelerate delivery and product quality.

Available to hire

I am an experienced Java developer with 6+ years in the communication SaaS sector, skilled in SQL optimization and architecture design. I have proven expertise in managing high concurrency systems, with a strong focus on efficiency and innovation.

I have consistently delivered robust technical solutions aligned with business goals, and I thrive on helping customers through troubleshooting, training, and clear documentation. I enjoy building scalable backend systems, optimizing databases, and integrating modern tooling to accelerate delivery and product quality.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Chinese

Fluent

English

Advanced

Work Experience

Software Engineer at Serko Ltd

November 1, 2024 - Present

Responsible for daily maintenance, operation, and iterative development of ~20 services including GDS Robot, Profile Sync Service, Profile Integration API, and Booking Integration. Built frontend applications using Nx Monorepo + React + TypeScript. Implemented and managed systems with a hexagonal architecture, designed efficient project databases, and performed routine database operations, maintenance, and performance optimization. Responded to customer inquiries, conducted troubleshooting, and assisted in resolving issues. Provided basic software operation and product iteration training for customers. Compiled and maintained user manuals, FAQs, and troubleshooting guides. Customized Azure firewalls to adapt internal services, implemented environment isolation, and enhanced security via firewall and WAF configurations. Integrated AI tools (Claude Code, Copilot) to improve development efficiency, reducing iteration cycle from 5 days to 3 days.

Senior Java Developer at Lifang Technology Co Ltd

May 1, 2021 - November 1, 2024

Led design and development of an ETC recovery system, supporting 20,000 QPS high concurrency. After launch, achieved ~50,000 RMB daily recovery per client. Performance optimization included reducing handheld device status query from 90s to 2s via SQL and architecture adjustments, and reducing check-in from 20s to 2s via multithreading and data archiving. Integrated MQ and ClickHouse to optimize client report analysis from 40s to 2s. Established standardized development processes and data practices, shortening iteration cycles by 2 days. Reengineered the smart parking invoice system to upgrade third‑party interfaces from single-port to multi-port, boosting reusability and scalability.

Mid-Level Java Developer at Asiainfo

February 1, 2019 - May 1, 2021

Led requirements analysis and solution design for the new energy intelligent middle platform, addressing critical reliability issues (e.g., Dubbo timeouts) by optimizing third-party configuration strategies. Provided data analysis support for backend big data marketing of China Mobile APP, and built a sales staff performance tracking function. Implemented a log analysis and monitoring system with Logstash and Elasticsearch for real-time status monitoring and rapid fault localization, and integrated Prometheus/Alertmanager for real-time alerts.