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EX Squared LATAM

Mid Fullstack Developer, React, Java

EX Squared LATAM

. Design, develop, and maintain full stack applications using React.js, Java, and Spring Boot .

Posted 5/7/2026contractSan José • 🇨🇷 Costa RicaMid-LevelSeniorWebsite

Tech Stack

Tools & technologies
AWSCypressJavaJavaScriptJenkinsJestJUnitLinuxMicroservicesMySQLOraclePostgresReactReduxSpringSpring BootSpringBootSQLTypeScriptUnix

About the role

Key responsibilities & impact
  • Design, develop, and maintain full stack applications using React.js, Java, and Spring Boot
  • Build scalable and reusable frontend components using modern JavaScript/TypeScript
  • Develop and optimize backend services and RESTful APIs for enterprise applications
  • Integrate frontend and backend services with AWS infrastructure (S3, Lambda, API Gateway, RDS)
  • Work with state management libraries such as Redux, Zustand, Recoil, or Context API
  • Collaborate with UI/UX designers to create responsive and user-friendly interfaces
  • Apply object-oriented design principles and design patterns to scalable backend solutions
  • Optimize application performance across frontend and backend layers
  • Write unit, integration, and end-to-end tests using frameworks such as Jest, JUnit, Cypress, or Playwright
  • Participate in CI/CD workflows using GitHub Actions, Jenkins, or GitLab CI
  • Collaborate with cross-functional teams including Product, QA, Design, and DevOps
  • Contribute to code reviews, observability, troubleshooting, and continuous improvement initiatives

Requirements

What you’ll need
  • 3+ years of professional experience in Full Stack development
  • Strong experience with React.js and modern JavaScript/TypeScript (ES6+)
  • Solid experience with Java, Spring Boot, and Spring MVC
  • Strong understanding of RESTful APIs and microservices architecture
  • Experience with relational databases such as PostgreSQL, Oracle, or MySQL
  • Familiarity with PL/SQL, JSON, and XML
  • Experience integrating applications with AWS services such as Lambda, API Gateway, S3, and RDS
  • Experience with frontend state management and React Hooks
  • Knowledge of HTML5, CSS3, and responsive design principles
  • Experience with testing frameworks for frontend and backend applications
  • Familiarity with CI/CD pipelines and Git workflows
  • Comfortable working in Unix/Linux environments
  • Strong communication and collaboration skills in agile environments

Benefits

Comp & perks
  • 6-month contract
  • Hybrid model – Required to attend the office 1 day per week

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
React.jsJavaSpring BootJavaScriptTypeScriptRESTful APIsPostgreSQLOracleMySQLCI/CD
Soft Skills
communicationcollaborationagile