Lead Java Developer

We're looking for a Lead Java Developer to join our team in Spain in a remote working mode. In this role, you will design and develop scalable, data-driven applications and microservices leveraging Java and cloud-native architectures. You will collaborate with cross-functional teams to simplify user journeys, ensure real-time data integrity and drive high-quality software delivery following Agile principles.

This position offers the opportunity to contribute to the development of business-critical platforms for a leading global financial market infrastructure provider, with exposure to emerging technologies including AI integration and advanced DevOps practices.

Responsibilities

• Develop, enhance and maintain Java-based applications using Spring Boot and modern frameworks
• Design and implement microservices architectures, adhering to RESTful API standards
• Build cloud-native solutions on AWS, including Lambda, API Gateway, DynamoDB and other services
• Ensure application reliability and scalability while improving performance and usability
• Implement CI/CD pipelines using GitLab, Terraform and containerization with Docker
• Apply TDD principles, covering unit, integration and contract-based testing
• Produce clean modular code and maintain comprehensive API documentation with OpenAPI/Swagger
• Collaborate with stakeholders to future-proof technical designs for evolving analytics needs
• Design and deploy AI-enabled features using Java and integrated AI frameworks
• Stay current with Java ecosystem trends, AWS best practices and AI development techniques

Requirements

• 5+ years of hands-on experience in Java development (Java 17+ preferred)
• Solid background in Spring Boot or Quarkus for enterprise-grade applications
• Expertise in RESTful APIs and microservices architecture on HTTP standards
• Practical experience with AWS services such as Lambda, EC2, S3, Step Functions, EKS, DocumentDB and Bedrock
• Proficiency in relational and non-relational databases, including SQL
• Familiarity with CI/CD tools and pipelines, especially GitLab and Terraform
• Strong command of TDD methodologies for unit, integration and contract testing
• Knowledge of cloud-native design patterns and modular coding principles
• Excellent communication skills in English (B2 level or higher)

Nice to have

• Experience with Elasticsearch for search and analytics use cases
• Knowledge of AI Software Development Lifecycle and prompt engineering
• Understanding of AI agent frameworks and continuous improvement cycles for AI solutions
• Familiarity with advanced CI/CD pipeline orchestration and infrastructure automation