Senior Backend

我们的酒店管理解决方案由多个面向领域的微服务domain-oriented microservices组成并由数个跨职能团队共同开发您将参与开发面向酒店行业的分布式系统的一部分该系统由多个面向领域的微服务组成由若干跨职能团队共同开发通过您的工作您将为全球数以千计酒店员工的工作体验带来改善 

随着业务的发展需招募高级Backend开发工程师若干名详情如下 

主要职责范围 

1. 系统功能的开发实施与维护 

• 运用领域驱动设计Domain-Driven Design的原则在现有的微服务microservice生态系统中设计可扩展的解决方案 
• 实现复杂的酒店管理业务逻辑包括预订费用结算和报表功能 
• 在系统架构不断进化的过程中确保其兼容性 
• 设计容错组件以应对高吞吐量的数据处理任务 
• 与产品团队协作将业务需求进行技术转化 

2. 为第三方构建专用的数据导出解决方案 

• 为与酒店管理系统对接的第三方系统设计并实现稳健的 API 集成 
• 为酒店管理系统PMS渠道管理系统Channel Management及收益管理工具创建数据导出机制 
• 为B2B集成实施安全的身份验证和授权机制 
• 开发支持多种格式XML JSON CSV的基于文件的导出解决方案 
• 确保外部数据交换的一致性和可靠性 
• 管理API版本控制并维护现有集成兼容性 

3. 为分析和报表目的构建可扩展的数据聚合策略 

• 设计高效的数据聚合管道用于酒店经营分析和商业智能BI 
• 对于酒店大数据场景设计实时和批处理解决方案 
• 创建针对入住率收入和运营指标报表的优化数据模型 
• 开发处理复杂酒店数据转换的ETL抽取转换加载流程 
• 确保来自多个数据源的数据质量和一致性 
• 与数据分析师协作理解报表需求并优化查询性能 

4. 每日进行代码审查并参与评审流程 

• 专注于代码质量安全性和性能进行彻底的代码审查 
• 确保代码符合编码标准SOLID原则及既定的架构模式 
• 就实现方法提供富有建设性的反馈并提出改进建议 
• 审查数据库查询寻找优化机会并发现潜在的性能问题 
• 验证错误处理日志记录和监控功能的正确实施 
• 提交带有清晰描述和上下文的文档齐全的拉取/合并请求Pull/Merge Requests 
• 及时响应审查反馈并落实改进建议 
• 参与关于实现方法和设计决策的技术讨论 
• 遵循既定的分支策略和合并流程 
• 确保所有代码变更都包含适当的单元测试和集成测试 
• 保持较高的代码覆盖率和质量 

5. 使用高级工具优化API和报表中SQL查询的性能 

• 分析并优化处理大型酒店数据集的复杂PostgreSQL查询 
• 为时序酒店数据设计高效的数据库索引和分区策略 
• 实施查询优化技术包括适当的连接Join策略和子查询优化 
• 使用数据库性能分析工具识别并解决性能瓶颈 
• 监控查询执行计划并在适当情况下实施缓存策略 
• 优化Entity Framework查询并实施高效的数据访问模式 

6. 在敏捷开发的框架下进行协作式迭代式的软件开发 

• 积极参与例会迭代规划和评审会议等 
• 与质量保证QA产品构架以及产品团队等跨职能团队进行有效协作 
• 通过提供准确的工作量预估和技术洞察参与迭代规划 
• 在保持代码质量和交付时间线的前提下适应不断变化的需求 
• 通过自动化测试和监控实践持续集成与持续部署CI/CD 
• 参与生产环境问题的事件响应和事后分析Post-mortem analysis 

技术需求 

• C# 9 .NET Core使用最新的C#特性和现代.NET生态系统 
• PostgreSQL高级SQL特性JSON支持分区及性能调优 
• 微服务面向服务的架构服务间通信及分布式系统模式 
• SwaggerAPI文档生成测试及客户端代码生成 
• Docker容器化编排及部署策略 
• Redis缓存会话管理及分布式数据结构 
• Kafka事件流处理消息队列及服务间的异步通信 
• Elastic Search加分项全文搜索日志聚合及分析 
• Visual Studio 2022 / Resharper / Rider配备高级调试和重构工具的专业开发环境 

Your job will be to develop a part of a distributed system that serves the hospitality industry. The system consists of many domain-oriented microservices developed under a few cross-functional teams. You can bring a smile to the faces of thousands of people working in hotels across the globe.

Key Areas of Responsibilities

Designing implementing and maintaining new functionalities within a living system

• Design scalable solutions within existing microservices ecosystem using Domain-Driven Design principles
• Implement complex business logic for hotel management operations including reservations billing and reporting
• Ensure backward compatibility while evolving system architecture
• Design fault-tolerant components that handle high-volume hospitality data processing
• Collaborate with product teams to translate business requirements into technical specifications

Building dedicated export solutions for 3rd parties

• Design and implement robust APIs integration for external hotel management systems
• Create data export mechanisms for property management systems channel managers and revenue management tools
• Implement secure authentication and authorization for B2B integrations
• Develop file-based export solutions supporting various formats (XML JSON CSV)
• Ensure data consistency and reliability in external data exchanges
• Manage API versioning and maintain backward compatibility for existing integrations

Building scalable aggregated data strategy for analytical and reporting purposes

• Design efficient data aggregation pipelines for hotel performance analytics and business intelligence
• Implement real-time and batch processing solutions for large-scale hospitality data
• Create optimized data models for reporting on occupancy revenue and operational metrics
• Develop ETL processes that handle complex hotel data transformations
• Ensure data quality and consistency across multiple data sources
• Collaborate with data analysts to understand reporting requirements and optimize query performance

Performing code reviews daily and participating in code review process

• Conduct thorough code reviews focusing on code quality security and performance
• Ensure adherence to coding standards SOLID principles and established architectural patterns
• Provide constructive feedback on implementation approaches and suggest improvements
• Review database queries for optimization opportunities and potential performance issues
• Validate proper error handling logging and monitoring implementation
• Submit well-documented pull/merge requests with clear descriptions and context
• Respond promptly to review feedback and implement suggested improvements
• Engage in technical discussions about implementation approaches and design decisions
• Follow established branching strategies and merge procedures
• Ensure all code changes include appropriate unit and integration tests
• Maintain high code coverage and quality metrics

Using advanced tools to optimize performance of SQL queries used in APIs and reports

• Analyze and optimize complex PostgreSQL queries handling large hospitality datasets
• Design efficient database indexes and partitioning strategies for time-series hotel data
• Implement query optimization techniques including proper join strategies and subquery optimization
• Use database profiling tools to identify and resolve performance bottlenecks
• Monitor query execution plans and implement caching strategies where appropriate
• Optimize Entity Framework queries and implement efficient data access patterns

Working in a collaborative and iterative software development process with an Agile team

• Actively participate in Scrum ceremonies including daily standups sprint planning and retrospectives
• Collaborate effectively with cross-functional teams including QA Infrastructure and Product Team people
• Contribute to sprint planning by providing accurate effort estimates and technical insights
• Adapt to changing requirements while maintaining code quality and delivery timelines
• Practice continuous integration and deployment with automated testing and monitoring
• Participate in incident response and post-mortem analysis for production issues

Technologies used:

• C# 9 .NET Core - Latest C# features and ecosystem
• PostgreSQL - Advanced SQL features JSON support partitioning and performance tuning
• Microservices - Service-oriented architecture inter-service communication and distributed system patterns
• Swagger - API documentation testing and client code generation
• Docker - Containerization orchestration and deployment strategies
• Redis - Caching session management and distributed data structures
• Kafka - Event streaming message queuing and asynchronous communication between services
• Elastic Search (nice to have) - Full-text search log aggregation and analytics
• Visual Studio 2022 / Resharper / Rider - Professional development environment with advanced debugging and refactoring tools

Qualifications :

任职要求 

• 英语能力要求具备流利的英语口语和书面沟通能力能够向技术和非技术利益相关者传达复杂的技术概念具备撰写清晰的技术文档和API规范的经验能有效地在国际化的分布式团队中协作 
• 编程范式精通面向对象OOP和函数式编程FP范式对OOP原则有深刻理解具备C#函数式编程概念的经验并掌握设计模式 
• .NET技术具备.NET 8/9和Entity Framework的扎实经验精通最新.NET特性高级Entity Framework Core知识包括迁移查询优化和性能调优具备依赖注入中间件和 Core管道的经验 
• PostgreSQL具备丰富的PostgreSQL实战经验拥有高级SQL技能包括复杂连接窗口函数和CTE掌握数据库设计和规范化原则具备PostgreSQL特定功能如JSON/JSONB数组和自定义数据类型的经验拥有数据库性能调优和查询优化的知识 
• 数据库性能具备编写代码及配套测试的能力熟悉测试驱动开发TDD和行为驱动开发BDD实践掌握单元测试集成测试和端到端测试策略了解代码覆盖率分析和质量指标遵循整洁代码原则和SOLID设计模式 
• 软性素质思维开放积极主动乐于学习新技术并适应变化的需求能主动发现问题并在其影响团队前解决乐于协作解决问题并分享知识具备自我激励的职业发展态度定期参与技术社区并紧跟行业趋势能主动提出并实施流程改进方案 
• 工作经验至少3年同类职位经验且在IT行业拥有至少5年经验在高级后端开发岗位上有可证实的业绩具备领导技术项目并指导其他开发人员的经验具备处理复杂分布式系统的能力 

加分技能Nice To Have 

• Linux与Docker基础熟练使用Linux命令行及系统管理基础具备Docker容器化Docker Compose及容器编排的经验 
• 领域驱动设计DDD了解DDD概念包括限界上下文Bounded Contexts聚合Aggregates和领域事件Domain Events 
• CQRS与事件溯源模式具备命令查询职责分离CQRS和事件溯源Event Sourcing架构及事件存储管理的经验 
• 分布式系统与Web服务具备微服务通信模式同步和异步的经验了解分布式事务管理和最终一致性 
• AWS技术具备AWS RDS PostgreSQL及其他AWS数据库相关技术的经验者优先包括AWS RDS配置监控与优化AWS数据库迁移服务及备份策略AWS CloudWatch监控及性能洞察 
• 酒店系统经验具备酒店系统经验并对酒店应用熟悉者将被视为极大的优势包括了解酒店运营预订入住/退房计费流程熟悉酒店行业标准及集成PMS CRS GDS了解酒店收益管理和报表要求熟悉酒店特定的数据模型和业务规则 

Strong verbal and written communication skills in English are required

• Ability to communicate complex technical concepts to both technical and non-technical stakeholders
• Experience with writing clear technical documentation and API specifications
• Effective collaboration in international distributed teams

Fluent in Object-Oriented and Functional Programming paradigms

• Deep understanding of OOP principles
• Experience with functional programming concepts in C#
• Knowledge of design patterns

Knowledge 8/9 and Entity Framework

• Proficiency in features
• Advanced Entity Framework Core knowledge including migrations query optimization and performance tuning
• Experience with dependency injection middleware and Core pipeline

Strong experience with PostgreSQL

• Advanced SQL skills including complex joins window functions and CTEs
• Database design and normalization principles
• Experience with PostgreSQL-specific features like JSON/JSONB arrays and custom data types
• Knowledge of database performance tuning and query optimization

Good understanding of and hands-on experience with database performance aspects

• Index design and optimization strategies
• Query execution plan analysis and optimization
• Database monitoring and performance metrics analysis
• Experience with connection pooling and transaction management

Capability of writing clean code along with tests

• Test-driven development (TDD) and behavior-driven development (BDD) practices
• Unit testing integration testing and end-to-end testing strategies
• Code coverage analysis and quality metrics
• Clean code principles and SOLID design patterns

Open-minded proactive person

• Willingness to learn new technologies and adapt to changing requirements
• Initiative in identifying and solving problems before they impact the team
• Collaborative approach to problem-solving and knowledge sharing

Proactive attitude and continuous improvement

• Self-motivated approach to professional development
• Regular participation in technical communities and staying updated with industry trends
• Initiative in proposing and implementing process improvements

Minimum 3 years of experience with similar position and minimum 5 years of experience with IT industry

• Proven track record in senior backend development roles
• Experience with leading technical initiatives and mentoring other developers
• Demonstrated ability to work with complex distributed systems

Nice To Have Skills

Basics of Linux and Docker

• Linux command line proficiency and system administration basics
• Docker containerization Docker Compose and container orchestration

Domain-Driven Design

• DDD concepts including bounded contexts aggregates and domain events

Experience with CQRS and Event Sourcing patterns

• Command Query Responsibility Segregation (CQRS) implementation
• Event Sourcing architecture and event store management
• Experience with event-driven architecture patterns

Experience with distributed systems and web services

• Microservices communication patterns (synchronous and asynchronous)
• Distributed transaction management and eventual consistency

Experience with AWS RDS PostgreSQL and other AWS database-related technologies is a plus

• AWS RDS configuration monitoring and optimization
• AWS database migration services and backup strategies
• AWS CloudWatch monitoring and Performance Insights

Experience with hospitality systems and familiarity with hospitality applications is a strong plus

• Understanding of hotel operations including reservations check-in/check-out and billing processes
• Knowledge of hospitality industry standards and integrations (PMS CRS GDS)
• Experience with hotel revenue management and reporting requirements
• Familiarity with hospitality-specific data models and business rules

Remote Work :

No

Employment Type :

Full-time