🐢Yan Hai
Engineering Leader | Software Architect | Technical Problem Solver | Domain-Driven Designer
Engineering leader with extensive expertise in architecting and delivering scalable, high-performance systems across payments, enterprise software, and fintech domains. Passionate about tackling complex technical challenges while ensuring solutions directly align with strategic business objectives. Demonstrated success in leading distributed teams, navigating competing priorities, and driving measurable business impact through system optimization and consistent delivery of high-value outcomes.
Team over heroes
I believe long-term success comes from strong, collaborative teams rather than individual heroics.Ownership mindset
I take full responsibility for outcomes, from initial design through production delivery.Iterative improvement
Great systems are not built once; they evolve through continuous iteration and learning.Transparent communication
Open and timely feedback builds trust and keeps teams effective, even under pressure.Experience
Team Lead - Alternative SG
Adyen • Singapore- Spearheaded monorepo decomposition and microservices migration in the region, enabling autonomy and independence for the teams while reducing deployment dependencies and accelerating feature delivery
- Led standardization of payment flows for alternative and bank-based payments and architected flow-oriented monitoring framework, reducing integration complexity, and enabling proactive issue detection with data-driven optimization
- Successfully implemented Scrum methodology across the team, customizing agile practices to match evolving team maturity and dramatically improving delivery velocity — resulting in recognition as top-performing team in function group
Full Stack Java Developer
Adyen • Singapore- Architected and delivered two fullfledged India-specific payment integrations from scratch, enabling seamless processing of Alternative, Bank, and Card payments
- Spearheaded critical compliance initiatives including token localization and data purging, successfully orchestrating complete migration of tokens from global to India-specific infrastructure
- Played pivotal role in multiple APAC payment integrations by designing robust, scalable solutions that supported complete payment ecosystem from merchant onboarding through settlement processing
Manager
Works Applications • Singapore- Engineered comprehensive microservices architecture organized around business domains, utilizing Spring Cloud and Kafka to establish reliable, real-time communication channels and significantly enhance system resilience
- Led complete transformation of monolithic local payroll solution into modern, distributed microservices ecosystem using Docker and Kubernetes, dramatically improving scalability and maintainability, and streamlining lifecycle management
- Created flexible, extensible framework for defining, validating, and managing jurisdiction-specific data while ensuring seamless compatibility with existing legal forms and government submission portals
Software Engineer
Works Applications • Shanghai- Architected and delivered complete payroll product for Thailand market from ground up, meticulously designed to meet local compliance requirements and operational demands
- Modernized legacy systems with minimal documentation by implementing extensible architecture patterns and custom DSL enhancements, dramatically improving system flexibility and enabling successful international expansion
- Championed automation initiatives leveraging Selenium and Jenkins while establishing robust code quality practices, consistently delivering technical solutions in Agile environments
Education
Computer Technology
Master's degree • Nanjing University • Nanjing, ChinaNetwork Engineering
Bachelor's degree • Nanchang University • Nanchang, China
Skills
Back-end
Front-end
Never-end
Interests
Software
Hardware
Peopleware
Hobbies
Coding
Gym
Sleep
Languages
English
Mandarin
Silence