Yin Nana

Senior Engineer at OKX

Led backend system design and development for large-scale internal platforms used by HR and operations teams, covering configuration management, contract processing, and workforce digitization. Built foundational infrastructure enabling over 1,000 concurrent enterprise users.

Senior Engineer at OKX

Led backend system design and development for large-scale internal platforms used by HR and operations, covering configuration management, contract processing, and workforce digitization. Built foundational infrastructure enabling 1,000+ concurrent enterprise users. Designed a 3D configuration model (User, Page, Field) to support 50+ business scenarios with real-time configuration. Built Talent Review workflows with smart data inheritance and bulk operations, boosting evaluation efficiency by 3x and achieving 99.9% accuracy. Delivered Contract Lifecycle Platform modules (creation to renewal) with integrated workflows and rules engine. Refactored core modules with Redisson-based locking and microservices, achieving 2x throughput and sub-second latency. Created ESS Portal for secure HR document access with concurrency safeguards. Enabled onboarding document automation with faster retrieval (10x) and data collection (5x).

Senior Engineer at OKX

Led the backend system design and development of large-scale internal platforms for HR and operations, supporting configuration management, contract processing, and workforce digitization. Designed a dynamic configuration engine supporting 50+ business scenarios, improved evaluation workflows increasing efficiency by 3x and accuracy to 99.9%, delivered contract lifecycle modules integrating business rules, and optimized contracts modules for 2x throughput with sub-second latency. Developed secure employee portals with concurrency safeguards and enhanced document management achieving 10x faster retrieval and 5x faster data collection.

Senior Software Engineer at CreditEase

Built system framework and core modules using Java, Struts2, Mybatis, and Redis. Conducted code and system design reviews, collaborating with the product team to define feature specifications. Managed data migration, large-scale data processing, and SQL optimization. Led technical problem resolution, planned team tasks and assignments, synchronized status with teammates, and managed team resources.

Senior Software Engineer at Credit Ease

Owned backend core systems and database migration projects; led technical design and team execution. Rebuilt legacy customer service system (Spring Boot, MySQL, Redis); Migrated business data from Oracle to MySQL; Optimized service logic.

Senior Software Engineer at Credit Ease

Owned backend core systems and led database migration projects; drove technical design and team execution. Rebuilt legacy customer service system (Spring Boot, MySQL, Redis); Migrated business data from Oracle to MySQL; Optimized service logic for performance and reliability.

Senior Software Engineer at Credit Ease

Owned backend core systems development and database migration projects, leading technical design and team execution. Responsibilities included rebuilding legacy customer service systems using Spring Boot, MySQL, and Redis, migrating business data from Oracle to MySQL, and optimizing service logic for better performance.

Software Engineer at Eagle Eye Network Tech

Developed searching functionality using Java, Spring, Spring MVC, and Lucene. Collaborated on system design, review, and maintenance of Lucene searching micro-service application. Implemented quick response and scalable searching functions. Created unified interfaces and API documentation for external use. Performed fundamental development of base micro-service using Java, Spring, Spring MVC, and Mybatis.

Software Engineer at Eagle Eye Network Tech

Developed Lucene-based multimedia search and backend admin modules. Delivered Corporate Website 4.0, Internal Media Platform, and legacy data cleanup tools.

Software Engineer at Eagle Eye Network Tech

Developed Lucene-based multimedia search and backend admin modules; Delivered Corporate Website 4.0, Internal Media Platform, and legacy data cleanup tools.

Software Engineer at Eagle Eye Network Tech

Developed Lucene-based multimedia search and backend administration modules. Delivered the Corporate Website 4.0, Internal Media Platform, and legacy data cleanup tools.

Software Engineer at Youchuang Linkage Tech

Developed commercial banking systems, implemented API development, and integrated with upstream and downstream systems. Gained experience with Struts, Spring, Spring MVC, Hibernate, and frontend technologies including HTML, CSS, JavaScript, JQuery, Ajax, and JSP.

Software Engineer at Youchang Linkage Tech

Built inspection modules for Wuhan Rural Commercial Bank; handled dev + deployment.

Software Engineer at YouChuang Linkage Tech

Built inspection modules for Wuhan Rural Commercial Bank; handled development and deployment.