Location: Spain (100% Remote)
Seniority: Senior
Position: FULLSTACK JAVA DEVELOPER
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We are looking for a Senior Fullstack Java Developer to join one of our clients through an established international IT and business consulting company, with decades of experience delivering large-scale technology and organizational projects across multiple industries.
You will work for a leading company in the energy sector, contributing to the development of modern, scalable, and mission-critical systems. The projects focus on cloud-native architectures, event-driven systems, and high-performance platforms that support core energy operations.
About the Role
We are looking for a Senior Fullstack Java Developer with a strong backend focus who is motivated, collaborative, and comfortable working in modern, reactive environments.
You will be involved across the full software lifecycle, working closely with agile teams to design and implement tailor-made solutions for complex business processes in the energy domain.
As a Fullstack Java Developer, you will:
Design, develop, and maintain complex client-facing and backend applications
Work across the full technology stack, from frontend integration to backend services and cloud environments
Build reactive and event-driven systems using modern Java and Spring technologies
Collaborate in agile, cross-functional project teams to deliver customized software solutions
Translate business requirements and processes into robust technical implementations
Ensure high standards of code quality, scalability, performance, and reliability
Required Skills & Tech Stack
We value technical excellence, attention to detail, and a proactive mindset. The ideal candidate brings strong experience in the following areas:
Extensive experience with Spring Boot, including Spring WebFlux, reactive Kafka Streaming, WebSocket, and Kafka Reactive Binder
Strong expertise in database integration, especially PostgreSQL, Hibernate, JDBC, and R2DBC for reactive data processing
Solid experience with event-driven architectures, including Kafka as a message broker
Experience integrating Kafka with Spring Boot (e.g. Spring Cloud Stream)
Hands-on experience with cloud-native and containerized deployments, including Kubernetes, CI/CD pipelines, and Terraform
Ability to deliver clean, scalable, and reliable software within modern reactive technology stacks
Strong attention to detail and commitment to high-quality delivery
Excellent communication and interpersonal skills
Nice to have:
* Experience xsgfvud with time-series data processing and time-series databases
* Interest in modern development practices and AI-supported tools, with awareness of data protection and compliance requirements
* Very good English skills (German is a plus)
What We Offer
Salary range 45k–55k € + 10–15% bonus
100% remote work
Flexible working hours to support work-life balance
Personalized professional development aligned with your strengths and project interests
Flat hierarchies and a high degree of autonomy
Access to continuous learning platforms and training resources
Long-term projects in the energy sector, working on impactful and business-critical systems
If you’re interested in building modern, reactive software solutions for the energy sector while enjoying full flexibility and long-term growth, we’d love to hear from you.