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Fullstack Developer (Java & React)

Open 22d

Summary

Build and maintain full-stack applications using Java (Spring Boot) and React for global clients, designing APIs, troubleshooting issues, and collaborating across the development lifecycle.

This is a remote position.

At KIS, we are always looking for talented individuals to join our team for future opportunities. If you are a Full Stack and interested in working on innovative projects with one of our global clients, sign up for our Talent Pool!

Job Activities
  • Develop, maintain, and enhance full stack applications, delivering complete features from technical design to deployment.

  • Build and evolve backend systems using Java (Spring Boot) or Python
  • Develop and maintain modern frontend applications using React or similar frontend frameworks.
  • Troubleshoot bugs, investigate issues, and deliver fixes efficiently and reliably.

  • Fully understand business and technical requirements, proactively questioning what is unclear.

  • Translate business requirements into technical solutions and implementation plans.

  • Design and implement REST or GraphQL APIs, integrating multiple data sources.

  • Ensure high-quality deliveries by proactively testing, validating, and refactoring code.

  • Participate in the full software development lifecycle, including design, development, testing, deployment, and maintenance.

  • Monitor application performance and contribute to production support and continuous improvement.

  • Collaborate closely with team members, contributing to task planning, estimation, and prioritization.

  • Communicate effectively with clients, actively participating in meetings and technical discussions.

  • Identify risks, competing priorities, or delivery issues early and escalate appropriately.

  • Contribute to improving development processes, architecture, and team practices.

  • Support and mentor other team members when needed, helping ensure overall team delivery.


Requirements

  • Experience as a Full Stack Developer, delivering features across frontend, backend, and database layers.

  • Strong experience in Java (Spring Boot); Python or other backend stacks.

  • Strong experience with React or similar frontend frameworks.
  • Experience with LLM integrations.

  • Solid understanding of SQL and relational databases for data manipulation and analysis.

  • Knowledge of software design principles, including SOLID and clean architecture concepts.

  • Experience designing and integrating REST and/or GraphQL APIs.

  • Strong problem-solving skills, including cross-layer debugging and root cause analysis.

  • Experience implementing secure authentication and authorization and mitigating common vulnerabilities (XSS, SQL Injection, CSRF).
  • Strong sense of ownership, responsibility, and accountability for delivery quality and timelines.

  • Good organization and time management skills, with the ability to estimate work and meet deadlines.

  • Good English communication skills to collaborate with international clients.

  • Team-oriented mindset, open to feedback and continuous learning.

  • Must be based in Latin America.


See also

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