Senior Fullstack Developer K-LAGAN•Barcelona, barcelonés (comarca); provincia de barcelona; cataluña, Spain
Descripción del trabajo
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.
Our Solutions
We offer a comprehensive technology portfolio including:
Technical Assistance
Turnkey Projects
Managed Services (SLA)
Custom Technology Products
Specialized Consulting
Nearshore / Offshore Projects
We also work in key areas such as Cybersecurity, Data, QA, Agile, AI & Business Transformation, and Green IT.
The Opportunity
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.
Your Mission
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
Requirements
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)
Nice to Have
Experience with TypeScript on the frontend
Azure certifications or knowledge of monitoring tools
Ability to propose efficient architectural solutions connecting frontend and backend systems
What We Offer
Stable, innovative, and international projects aligned with your experience
Permanent contract
Hybrid work model depending on the project
Versátil working hours
3 C's Recognition Program (Commitment, Communication & Customer Orientation) with financial rewards
Career development plan and continuous learning opportunities
Birthday day off
Private health insurance and flexible compensation plan
Gym discounts
Childcare, language learning, and transportation support
Annual volunteering day
Events and team buildings: afterworks, tech cafés, dinners, barbecues...
Summer and Christmas company dinners
+1 additional vacation day after every 4 years with the company
Our Commitment
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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📌 Senior Fullstack Developer (Barcelona)
🏢 K-Lagan
📍 Barcelona