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K-LAGAN Logo K-LAGAN · IT - Software Development

Fullstack Developer Java+React

Spain · Job Posted February 19, 2026
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Job Description

We are looking to hire a Fullstack Developer (Java + React) to join our Software Engineering team, someone eager to be part of an international, dynamic, and fast-evolving environment. If you are motivated by working on impactful projects, growing professionally, and bringing value through your expertise — this is your place. As a Fullstack Developer, your mission will be to build end-to-end applications, leading the implementation of interactive React interfaces and robust Java backend services, ensuring efficient deployment in cloud environments.

Job Responsibility

  • Develop modern user interfaces and reusable components using React.js and Redux/Context API
  • Build scalable APIs with Java and Spring Boot to support frontend functionalities
  • Manage container lifecycle with Docker and orchestration using Kubernetes for production environments
  • Automate deployments through CI/CD pipelines, ensuring continuous delivery in Azure
  • Optimize application performance and security, ensuring a smooth and secure user experience

Requirements

  • Education: Computer Engineering, Software Development degree, or equivalent technical background
  • Experience: 4+ years in software development with strong expertise in Java and React
  • Technical skills: Java (Spring Boot), React.js, Docker, Kubernetes, CI/CD, Azure Cloud services
  • Languages: Fluent English (B2/C1) for international collaboration
  • Other: Familiarity with Agile methodologies and best practices (Clean Code, TDD)

Nice to have

  • Experience with TypeScript on the frontend
  • Azure certifications or knowledge of monitoring tools
  • Ability to propose architectural solutions connecting frontend and backend efficiently

What we offer

  • Stable, innovative, and international project aligned with your experience
  • Hybrid work model (depending on project)
  • Flexible working hours
  • 3 C’s Recognition Program (Commitment, Communication, Customer Orientation) with financial incentives
  • Career development plan and continuous training
  • Birthday off
  • Private health insurance and flexible compensation plan
  • Gym discount
  • Support for childcare, language courses, and transportation
  • Annual Solidarity Day
  • Social events & team buildings: afterworks, tech cafés, dinners, barbecues…
  • Summer and Christmas dinners
  • +1 extra vacation day after every 4 years with us
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