Senior Java Software Engineer

About Hytech Hytech is a leading management consulting firm headquartered in Australia and Singapore, specialising in digital transformation for fintech and financial services organisations. We deliver end-to-end consulting services and provide robust middle- and back-office solutions that enable our clients to optimise operations, enhance efficiency, and stay ahead in a fast-evolving digital landscape. Our client portfolio includes top global trading platforms and leading crypto exchanges. With more than 4,000 professionals worldwide, Hytech has a strong and growing international presence, with offices across Australia, Singapore, Malaysia, Taiwan, the Philippines, Thailand, Morocco, Cyprus, Dubai, and beyond. About the Role: Hytech Group is building its Taipei team to become a core global hub for payment technology development, focused on solving highly complex technical challenges for clients worldwide. In this role, you will work on high-throughput, high-performance systems and contribute to the design and development of mission-critical payment services, ensuring stability, accuracy, and seamless integration with external platforms. Operating in a fast-paced, precision-driven industry, your decisions and execution will directly impact product performance and the transaction experience for customers around the globe. Key Responsibilities: Design, develop, and maintain high-traffic and highly available Java backend services, ensuring system performance, stability, scalability, and maintainability to support key business functions.Design system architecture and evaluate technical solutions against business requirements, making appropriate technical decisions to build scalable, reliable backend systems.Analyze and optimize system performance, stability, and maintainability, including high-concurrency processing, SQL performance, JVM memory, caching, and other key components of backend systems.Design and implement backend services and core components using Java, Spring Boot, RESTful APIs, MyBatis/JPA/Hibernate, MySQL, Redis, and Kafka or other Message Queue technologies.Troubleshoot production issues and drive continuous improvement, identifying root causes and implementing appropriate solutions to improve system reliability and prevent recurring issues.Conduct code reviews and establish development standards, ensuring code quality, consistency, and adherence to technical standards across the team.Collaborate with PM, QA, DevOps, frontend, and other cross-functional teams to ensure effective project execution, technical alignment, and timely delivery.Mentor and support Junior/Mid-Level Engineers, provide technical guidance, and contribute to team capability development and engineering practices.Support team technical planning, task allocation, and project execution, helping the team prioritize work and achieve project objectives.Drive continuous improvement of development processes and engineering practices, identifying opportunities to improve development efficiency, system quality, and team collaboration. What We’re Looking For: 6+ years of Java backend development experience; at least 1 year of technical management or Team Lead experience is a plus, but not mandatory.Proficient in Java and Spring Boot, with hands-on experience in Java 17; experience with Java 21 is a plus.Hands-on experience designing and developing RESTful APIs and backend services for high-traffic and highly available systems.Strong understanding of database and caching technologies, with hands-on experience in MySQL, MyBatis or JPA/Hibernate, Redis, and SQL performance tuning.Solid experience in distributed and high-concurrency system design, including Microservice architecture, Transaction management, Cache design, Thread, Concurrency, and lock mechanisms.Experience with Kafka or other Message Queue technologies, with an understanding of their application in scalable backend systems.Experience in JVM memory tuning, system performance optimization, monitoring, and log analysis, with the ability to independently identify and resolve technical issues.Strong technical ownership and problem-solving ability, with the ability to independently analyze Production Issues, identify root causes, and propose appropriate improvement solutions.Strong code quality and technical governance awareness, with hands-on experience in Code Review, Coding Standards, and technical quality control.Strong technical leadership and people development capabilities, with experience mentoring engineers, allocating work, managing project progress, and driving team delivery. 【Nice-to-have】 Experience in payment system development.Experience with Docker, Kubernetes, AWS, or GCP.Experience building and maintaining CI/CD pipelines.Experience with Redis Cluster or Kafka Cluster.Experience with Elasticsearch or OpenSearch.Experience with system monitoring and observability tools, such as Prometheus, Grafana, or Dynatrace.Experience in system refactoring or large-scale projects.Hands-on experience in performance tuning and optimization.Experience applying AI in software development or workflows. *If this job description resonates with you, we encourage you to apply even if you don't meet all the requirements. Location: Zhongshan Dist., Taipei City (Hytech Taipei Office) --- At Hytech, we are dedicated to fostering a diverse and inclusive workplace where every team member feels valued, respected, and supported. Be part of our journey—Apply Today!