Full Stack Developer (Java Springboot) Middle- Senior level

About the Role

The role focuses on maintaining the existing platform while redesigning and modernizing key features to enhance scalability, performance, long-term maintainability and works closely with the Product Owner, development team, and QA to translate business requirements into well-structured technical solutions, contribute to system design and code quality, and provide technical guidance through code reviews to ensure the delivery of reliable and sustainable software solutions.

Responsibilities

• Develop and migrate legacy features to modern architectures (Microservices or Modular Monolith).
• Design, develop, and maintain robust backend services using Java (Spring Boot) or Kotlin depending on the module.
• Implement and optimize high-performance APIs using gRPC, REST, and GraphQL based on functional requirements.
• Manage data persistence and caching strategies using SQL Server, MongoDB, and Redis.
• Develop responsive user interfaces using Preact (leveraging React knowledge) and Tailwind CSS for high performance and consistent UI components.
• Bridge the gap between design (Figma) and technical implementation to ensure seamless UX.
• Conduct rigorous code reviews, enforce coding standards, ensure high test coverage (Unit/Integration/Contract/Performance Tests), and mentor developers on testing best practices.
• Collaborate with the Product Owner to refine business requirements into technical specifications and testable backlog items for sprint planning.
• Lead feature developments or mini-teams, taking ownership from design to deployment in a CI/CD environment (GitLab/Jenkins).
• Produce technical documentation and reports, proactively identify and remove technical blockers, and strategically refactor legacy code while delivering new business value without regression.
• Manage complexity of data fetching and state management between Java/Kotlin backend and Preact frontend and drive a quality-first engineering culture.

Qualifications

• Bachelor’s or Master’s degree in Computer Engineering, Computer Science or related fields.
• 4–7 years of working experience in Bank or Non-Bank (financial product & services).
• Strong proficiency in Java (ecosystem) and modern JavaScript/TypeScript.
• Solid understanding of Object-Oriented Programming (OOP), Design Patterns, and Clean Architecture.
• Deep knowledge of Spring Boot framework and build tools like Gradle/Maven.
• Bonus: Familiarity with Golang or Rust is a plus.
• Experience with API design and implementation using RESTful, gRPC, and GraphQL.
• Understanding of Secure Coding practices (e.g., OWASP Top 10), data encryption (symmetric/asymmetric), and secure API authentication/authorization (OAuth2, JWT, mTLS for gRPC).
• Experience writing and maintaining unit tests to meet defined code coverage requirements.
• Proficient in frontend frameworks, specifically Preact (or React) and build tools like Vite; understanding of JavaScript/TypeScript fundamentals and utility-first CSS frameworks (Tailwind CSS).
• Strong SQL skills (e.g., SQL Server) and experience with NoSQL databases (MongoDB) and caching mechanisms like Redis.
• Hands-on experience with Containerization (Docker) and Orchestration (Kubernetes / OpenShift).
• Proficient in using GitLab or Jenkins for CI/CD pipelines.
• Understanding of Microservices architecture, Distributed Systems, and Brownfield development strategies (refactoring legacy code).

Benefits

• Good remuneration package and excellent future career growth opportunity for the right candidate.

Additional Information

• Working location: Krungsri Ploenchit Office (KSPO) & Bank of Ayudhya Rama III (BAY). Hybrid work: Onsite 3 days/week.
• Employment type: Full-time.
• Please submit your application letter and resume stating qualifications, experiences, recent & expected salary to: Human Resources Department, Krungsri Consumer, 17 Fl., Krungsri Ploenchit Tower, 550 Ploenchit Rd., Lumpini, Pathumwan, Bangkok 10330. Contact person: Supansa (FON), Contact number: 081-9498791.
• หมายเหตุ: กลุ่มบริษัทกรุงศรี คอนซูมเมอร์ (บริษัทฯ) มีความจำเป็นและจะมีขั้นตอนการตรวจสอบข้อมูลส่วนบุคคลเกี่ยวกับประวัติอาชญากรรมของผู้สมัคร ก่อนที่ผู้สมัครจะได้รับการพิจารณาเข้าร่วมงาน ผู้สมัครสามารถอ่านประกาศการคุ้มครองข้อมูลส่วนบุคคลส่วนงานทรัพยากรบุคคลของบริษัทฯ ได้ โดยการพิมพ์ลิงค์ https://www.krungsriconsumer.com/consumer-news/personal-data