🐢Yan Hai
Team Lead | Software Engineer | Problem Solver | Domain-Driven Designer
Engineering leader with deep expertise in designing and delivering scalable, high-performance systems in the payments domain. Experienced in solving complex technical challenges while aligning solutions with business goals. Focused on reliability, maintainability, and long-term architectural integrity. Proven ability to lead distributed teams, balance competing priorities, and drive business impact by optimizing systems for scale and consistently delivering high-value outcomes.
Experience
Team Lead - Alternative SG
Adyen • Singapore- Led the successful adoption of Scrum to enhance development efficiency and cross-team collaboration, strategically rolling out tailored agile practices that matched the team’s evolving maturity - boosted delivery velocity and effectiveness, resulting in recognition as the top-performing team within the function group.
- Defined and aligned OKRs with stakeholders, taking full ownership of key results and driving execution with clarity and accountability — garnering cross-functional recognition for fostering focus and measurable impact.
- Mentored and empowered team members to lead global engineering initiatives, including the decomposition of monolithic systems and implementation of monitoring metrics for alternative and bank-based payments — demonstrating strong technical leadership and deep understanding of business needs.
Full Stack Java Developer
Adyen • Singapore- Led the end-to-end development of two India-specific payment integrations, enabling seamless processing of Alternative, Bank, and Card payments within the region.
- Drove key compliance initiatives such as token localization and data purging, managing the full migration of tokens from global to India infrastructure.
- Contributed significantly to various APAC payment integrations by crafting scalable technical solutions that supported the entire payment lifecycle — from onboarding to settlement.
Manager
Works Applications • Singapore- Designed and implemented microservices structured around business domains, leveraging Spring Cloud and Kafka to enable reliable, real-time communication and improve system robustness.
- Spearheaded the transformation of a monolithic local payroll solution into a distributed microservices architecture.
- Leveraged Docker for containerization and implemented Kubernetes for streamlined orchestration, monitoring, and lifecycle management.
- Developed an extensible framework capable of defining, validating, and managing jurisdiction-specific data while maintaining full compatibility with legacy legal forms and submission portals.
Software Engineer
Works Applications • Shanghai, China- Successfully led the end-to-end development of a new payroll product for the Thailand market, built from scratch to meet local compliance and operational needs.
- Enhanced legacy systems with limited documentation by introducing extensible architecture and custom DSL enhancements, improving system flexibility and supporting overseas expansion.
- Drove automation initiatives using Selenium and Jenkins, and significantly improved code quality through peer reviews and code smell detection.
- Proactively collaborated in Agile teams, consistently aligning technical solutions with business goals and taking full ownership from design through deployment.
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