Senior Full-stack Software Engineer (Java & ReactJS)

KMS Technology is a strategic engineering company helping businesses turn bold ideas into high-impact solutions—faster. Founded in 2009 as a U.S.-based services company, we’ve grown into a global organization with locations in the US, Vietnam, Mexico and Poland. KMS is trusted globally for the quality of our engineering and consulting services. We bring deep expertise in product development and quality assurance, Data & AI-native engineering, and delivery excellence to every engagement. Our mission is to help customers build what’s next—accelerating innovation, crafting brilliant solutions, and creating  real-world impact. At KMS, we believe sustainable growth is built on the success of our clients and employees, and in making a lasting contribution to our communities.

More about KMS Technology:

Website: https://kms-technology.com 

Linkedin: https://www.linkedin.com/company/kms-technology

• Design, develop, and maintain full-stack web applications with Java (core focus), Spring Boot/ Quarkus on the backend and ReactJS on the frontend.
• Design and implement RESTful APIs, ensuring scalability, security, and performance.
• Participate in system design, technical solutioning, and code reviews.
• Collaborate with Product Owner, QA, and DevOps to deliver features end-to-end.
• Work with AWS/Azure cloud services to deploy, operate, and troubleshoot applications in production.
• Write and maintain unit tests and integration tests to ensure high code quality.
• Mentor and support junior engineers.
• Participate in Agile/Scrum activities (planning, estimation, demo, retrospective).

General requirements:

• At least intermediate English communication (working with international clients).
• Likely having 4+ years of experience (flexible depending on how fast your learning and technical developing capabilities are)
• Strong ownership mindset; able to work independently with minimal guidance.
• Proactive learner, adaptable to new technologies and domains.
• Experience in collaborating with the client's development team

Technical requirements:

• Strong experience in Java (main core) with Spring Boot/Quarkus for back-end and building RESTful APIs
• Hands-on experience with ReactJS for front-end
• Good understanding of OOP design, design patterns, and clean code principles
• Experience with PostgreSQL and writing efficient queries
• Solid understanding of SPA concepts: component-based architecture, state management, REST integration
• Good experience in unit testing and API testing (JUnit, Mockito, Jacoco, Postman)
• Experience with Docker for building and running applications
• Experience using Git with GitHub workflow and GitHub Actions
• Good understanding of CI/CD pipelines and modern software delivery practices
• Strong focus on code quality, maintainability, reusability, and code review

Nice to have:

• Experience with Spring Cloud or microservices architecture
• Experience in microservices and cloud environments (Azure/AWS/GCP) 

Perks You'll Enjoy 

• Working in one of the Best Places to Work in Vietnam
• Building large-scale & global software products
• Working & growing with Passionate & Talented Team
• Diverse careers opportunities with Software Outsourcing, Software Product Development, IT Solutions & Consulting
• Attractive Salary and Benefits
• Performance appraisals every year and performance bonus
• Onsite opportunities: short-term and long-term assignments in North American (U.S, Canada), Europe, Asia.
• Flexible working time
• Various training on hot-trend technologies, best practices and soft skills
• Premium healthcare insurance for you and your loved ones
• Company trip, big annual year-end party every year, team building, etc.
• Fitness & sport activities: football, tennis, table-tennis, badminton, yoga, swimming…
• Joining community development activities: 1% Pledge, charity every quarter, blood donation, public seminars, career orientation talks,…
• Free in-house entertainment facilities (foosball, ping pong, gym…), coffee, and snack (instant noodles, cookies, candies…)

And much more, join us and let yourself explore other fantastic things!