Question
Full-time
5-10

Senior Full-stack Software Engineer (ReactJS, Java)

12/18/2025

The Senior Full-stack Software Engineer will perform hands-on coding, code reviews, and develop applications based on customer requirements. They will also participate in Agile/Scrum activities and provide mentoring for junior members.

Working Hours

40 hours/week

Company Size

501-1,000 employees

Language

English

Visa Sponsorship

No

About The Company
KMS is a strategic product development partner helping businesses turn bold ideas into high-impact software - faster. Our mission is to accelerate innovation through deep product expertise, AI-native engineering, and a culture of true partnership that drives meaningful outcomes - for our customers, our people, and the industries we serve. We don’t just build software - we build momentum, accelerate growth, and craft exceptional experiences that define what’s next.
About the Role

Company Description

KMS Technology was established in 2009 as a U.S.-based software services company. With development centers in Vietnam and Mexico, we have been trusted globally for the superlative quality of our software consulting & development services, technology solutions, and engineers' expertise. 

We pride ourselves on creating brilliant solutions for our clients by leveraging deep expertise, advanced technologies, and delivery excellence—achieving a shared success where everyone can reach their fullest potential. We believe that the business success we contribute to reflects our commitment to making a difference for our community, providing solutions that create long-lasting impacts within 3 main business sectors:

  • Enterprise software development services: Leverage software domain expertise to help clients make better business decisions in technology platforms, increase speed-to-market, and gain critical development support through innovative technology solutions
  • Healthcare technology solutions: Build transformative next-gen technologies to solve healthcare’s most challenging problems, providing innovative tools and expertise to providers, payers, life sciences, and medical technology vendors
  • Banking, Financial Services & Insurance (BFSI) technology solutions: Empower BFSI businesses to embrace the digital finance revolution and expedite clients’ journey towards complete digitalization, technology consulting, data analytics, software development, and software quality

Job Description

  • Perform hands-on coding and code review as other peer developers as needed.
  • Understand the requirements of the customer or business and utilize this knowledge to develop applications that are consistent with this.
  • Design, develop, review, implement, maintain and manage continuous integration, build management and deployment scripts, systems, and any code as required.
  • Participate in Agile/Scrum activities: daily standup, demo session, retrospective, estimate, and planning, etc.
  • Provide mentoring/training for junior members if any.
  • Perform other tasks assigned by the Line Manager.

Qualifications

General requirements:

  • At least intermediate English communication (able to work with international clients)
  • Likely having 5+ years of experience (flexible depending on how fast your learning and technical developing capabilities are)
  • Ability to obtain deep knowledge of the project technologies and work independently with minimum guidance
  • Ability to self-learn and adapt to new technologies quickly
  • Familiar with Agile development methodologies (Scrum, XP, Kanban)

Technical requirements:

  • Expert in ReactJS, HTML5, CSS3 and JavaScript/ES6
  • Hands-on experience in Java, Spring framework
  • Experience in building a single page application including front-end routing, 2-way data binding, client-side rendering, and JSON-based RESTful APIs
  • Experience with Responsive Layouts
  • Experience in the Unit Test frameworks such as Jest, Testing Library, Mocha, Jasmine
  • Hands-on experience in Platform as a Service like AWS
  • Practice knowledge of website optimization techniques and fast page load times
  • Understand practices for high code quality: maintainability, reusability, code reviewing, and unit testing. 

Nice to have:

  • Experience with front-end architectures such as Monorepo, Micro frontend.
  • Experience with large-scale web-based applications, setting up CI/CD pipelines and web security issues.
  • Experience in microservices and cloud environments (Azure/AWS/GCP)
  • Demonstrated interest and ability to learn other coding languages as needed

Additional Information

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!

Key Skills
ReactJSHTML5CSS3JavaScriptJavaSpring FrameworkSingle Page ApplicationFront-end RoutingData BindingClient-side RenderingJSON-based RESTful APIsResponsive LayoutsUnit Test FrameworksAWSWebsite OptimizationMicroservicesCloud Environments
Categories
TechnologySoftwareHealthcareConsulting
Benefits
Attractive Salary and BenefitsPerformance Appraisals Every Year and Performance BonusOnsite Opportunities: Short-term and Long-term Assignments in North America (U.S, Canada), Europe, AsiaFlexible Working TimeVarious Training on Hot-trend Technologies, Best Practices and Soft SkillsPremium Healthcare Insurance for You and Your Loved OnesCompany Trip, Big Annual Year-end Party Every Year, Team BuildingFitness & Sport Activities: Football, Tennis, Table-tennis, Badminton, Yoga, SwimmingJoining Community Development Activities: 1% Pledge, Charity Every Quarter, Blood Donation, Public Seminars, Career Orientation TalksFree In-house Entertainment Facilities (Foosball, Ping Pong, Gym), Coffee, and Snack
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