Senior Fullstack Developer K-LAGAN•Barcelona, barcelonés (comarca); provincia de barcelona; We are an international technology services company specialized in:
IT: Banking, Insurance, Retail & E-Commerce, Healthcare
Transport & Supply Chain: Rail, Automotive, Logistics, and Aerospace
Manufacturing: Renewable Energy, Oil & Gas, and Utilities
R&D: Research, innovation, and development of technology solutions
At K-LAGAN, we focus on innovation, real impact, and tailor‑made solutions, supporting our clients in transforming their businesses and processes.
Our purpose is clear: to humanize technology and lead sustainability while acting responsibly toward our people, our clients, and society. We create impact through innovation and talent, contributing to projects that help organizations grow, evolve, and transform.
Turnkey Projects
Nearshore / Offshore Projects
We also work in key areas such as Cybersecurity, Data, QA, Agile, AI & Business Transformation, and Green IT.
We are looking for a Fullstack Developer (Java + React) to join our Software Engineering team and become part of an international, dynamic, and constantly evolving environment. If you are motivated by impactful projects, professional growth, and bringing value through your expertise, this is the place for you.
As a Fullstack Developer, you will build end-to-end applications, leading the development of interactive React interfaces and robust Java backend services, ensuring efficient deployment in cloud environments.
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 lifecycles using Docker and Kubernetes orchestration in production environments
Automate deployments through CI/CD pipelines, ensuring continuous delivery in Azure
Optimize application performance and security to deliver a smooth and secure user experience
Degree in Computer Science, Software Development, or equivalent technical background
~4+ years of experience in software development with strong expertise in Java and React
~ Solid knowledge of Java (Spring Boot), React.js, Docker, Kubernetes, CI/CD, and Azure Cloud services
~ Fluent English (B2/C1 level) for communication with international teams
~ Familiarity with Agile methodologies and development best practices (Clean Code, TDD)
Experience with TypeScript on the frontend
Azure certifications or knowledge of monitoring tools
Ability to propose efficient architectural solutions connecting frontend and backend systems
Stable, innovative, and international projects aligned with your experience
~ Permanent contract
~ Hybrid work model depending on the project
~ Flexible working hours
~Private health insurance and flexible compensation plan
~ Summer and Christmas company dinners
~+At K-LAGAN, we believe in responsible technology (Green IT) and promote social impact initiatives such as our annual volunteering day, creating an environment where people can grow and thrive.
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IT: Banking, Insurance, Retail & E-Commerce, Healthcare
Transport & Supply Chain: Rail, Automotive, Logistics, and Aerospace
Manufacturing: Renewable Energy, Oil & Gas, and Utilities
R&D: Research, innovation, and development of technology solutions
At K-LAGAN, we focus on innovation, real impact, and tailor‑made solutions, supporting our clients in transforming their businesses and processes.
Our purpose is clear: to humanize technology and lead sustainability while acting responsibly toward our people, our clients, and society. We create impact through innovation and talent, contributing to projects that help organizations grow, evolve, and transform.
Turnkey Projects
Nearshore / Offshore Projects
We also work in key areas such as Cybersecurity, Data, QA, Agile, AI & Business Transformation, and Green IT.
We are looking for a Fullstack Developer (Java + React) to join our Software Engineering team and become part of an international, dynamic, and constantly evolving environment. If you are motivated by impactful projects, professional growth, and bringing value through your expertise, this is the place for you.
As a Fullstack Developer, you will build end-to-end applications, leading the development of interactive React interfaces and robust Java backend services, ensuring efficient deployment in cloud environments.
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 lifecycles using Docker and Kubernetes orchestration in production environments
Automate deployments through CI/CD pipelines, ensuring continuous delivery in Azure
Optimize application performance and security to deliver a smooth and secure user experience
Degree in Computer Science, Software Development, or equivalent technical background
~4+ years of experience in software development with strong expertise in Java and React
~ Solid knowledge of Java (Spring Boot), React.js, Docker, Kubernetes, CI/CD, and Azure Cloud services
~ Fluent English (B2/C1 level) for communication with international teams
~ Familiarity with Agile methodologies and development best practices (Clean Code, TDD)
Experience with TypeScript on the frontend
Azure certifications or knowledge of monitoring tools
Ability to propose efficient architectural solutions connecting frontend and backend systems
Stable, innovative, and international projects aligned with your experience
~ Permanent contract
~ Hybrid work model depending on the project
~ Flexible working hours
~Private health insurance and flexible compensation plan
~ Summer and Christmas company dinners
~+At K-LAGAN, we believe in responsible technology (Green IT) and promote social impact initiatives such as our annual volunteering day, creating an environment where people can grow and thrive.
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