Job Responsibilities 1、Design, develop and maintain backend systems for company platforms (Web & App) 2、Build and integrate third-party APIs and services, including payment providers, data providers and gaming partners 3、Develop and maintain high-performance, scalable and secure .NET applications 4、Participate in system architecture design, technical solution evaluation and performance optimization 5、Optimize database design and queries, ensuring data consistency and transaction safety 6、Ensure code quality, system stability and maintainability through best practices and design patterns 7、Collaborate with product, frontend, QA and operations teams to deliver reliable production systems 8、Support system troubleshooting, issue analysis and continuous improvement in live environments

Requirements 1、5+ years of experience in .NET application development, with strong proficiency in C#, ASP.NET, ASP.NET MVC 2、Solid understanding of .NET runtime internals, including value vs. reference types, GC mechanisms, caching concepts and performance optimization 3、Proficient with .NET core libraries, including collections, file I/O, regular expressions and multithreading 4、Strong experience with data access technologies such as ADO.NET, LINQ, Entity Framework, and a good understanding of ORM principles 5、Hands-on experience with service-oriented development and system integration, including HTTP/TCP, WebService, WCF, RESTful APIs, and message queues (e.g. MSMQ) 6、Strong knowledge of SQL Server and/or Oracle, skilled in SQL, stored procedures, transactions and query optimization 7、Good understanding of object-oriented design (OOD) and common design patterns 8、Ability to read and understand basic UML diagrams 9、Strong problem-solving skills and good communication abilities Nice to Have 1、Experience with Oracle and PL/SQL 2、Experience in calling unmanaged/native DLLs from C# 3、Prior experience in the gaming / lottery / betting industry