Senior Java Developer

ABOUT THE OPPORTUNITY

Join a leading retail technology company as a Senior Java Developer and contribute to building innovative payment systems that power modern retail operations across multiple markets. You'll be working on robust and scalable backend systems that handle complex payment processing, building production-grade microservices with Java, Spring Boot, and Azure Cloud while working extensively with Elasticsearch for search and analytics capabilities—a high-priority technical need for this role. Operating in a collaborative, agile team environment, you'll take ownership of technical aspects of development, work with talented engineers, mentor junior developers, and solve challenging technical problems in the payments and retail domain while contributing to the entire software development lifecycle from requirements through deployment.

PROJECT & CONTEXT

You'll work on mission-critical retail and payments systems that enable seamless transaction processing and payment orchestration across the organization's technology ecosystem. As a Senior Java Developer, you'll design and implement backend services using modern Java versions (newer versions strongly preferred) and Spring Boot framework for building production-grade microservices. Your work will involve deploying cloud-native applications on Azure Cloud infrastructure, managing infrastructure-as-code with Terraform, orchestrating containerized applications with Kubernetes, implementing event-driven architectures with Kafka, and designing federated GraphQL APIs. Elasticsearch expertise is a high-priority requirement—you'll implement search and analytics capabilities, design index structures, optimize query performance, and ensure data consistency across payment and retail systems. Your payments project experience will be leveraged heavily as you build secure, compliant, and reliable payment systems that meet strict quality, performance, and security requirements.

WHAT WE'RE LOOKING FOR (Required)

• Software Development Experience: Minimum 5 years of professional experience in software development with strong focus on Java backend development
• Modern Java Expertise: Strong proficiency in Java with deep understanding of object-oriented programming principles and design patterns - experience with newer Java versions (Java 11+, Java 17+, Java 21+) is a significant plus
• Spring Boot Framework: Hands-on production experience with Spring Boot for building microservices, RESTful APIs, and enterprise applications
• Elasticsearch: HIGH PRIORITY - Hands-on experience with Elasticsearch for search, indexing, query optimization, aggregations, and maintaining search infrastructure (URGENT REQUIREMENT)
• Azure Cloud Platform: Production experience with Microsoft Azure Cloud including core services, understanding of cloud architecture patterns, security, and deployment
• Terraform Infrastructure: Hands-on experience using Terraform for infrastructure-as-code, provisioning cloud resources, and implementing automation for Azure environments
• Kubernetes Orchestration: Production experience with Kubernetes for deploying and managing containerized applications
• Apache Kafka: Knowledge and practical experience with Apache Kafka for event streaming, pub-sub messaging patterns, and event-driven architecture
• GraphQL Federation: Experience with GraphQL Federation for building federated API gateways and schema composition
• Payments Domain: Demonstrated experience working on payments projects including payment processing, transaction handling, or financial systems
• Git & GitHub: Proficiency in Git for source code management using GitHub, branching strategies, pull requests, and code review workflows
• Testing Expertise: Strong experience with unit testing, integration testing, and test-driven development (TDD, Shift-Left)
• CI/CD Practices: Understanding of continuous integration and continuous deployment pipelines and automated testing
• Problem-Solving Skills: Strong analytical and problem-solving abilities for troubleshooting distributed systems and complex technical challenges
• Communication Skills: Excellent communication and teamwork abilities for collaborating across technical teams
• English Language: B2 level (Upper Intermediate) minimum for technical documentation and team collaboration
• Location: Based in Portugal with full remote work capability

NICE TO HAVE (Preferred)

• Advanced Spring Frameworks: Deep expertise in Spring Cloud, Spring Data, Spring Security, and other Spring ecosystem components
• Agile Methodologies: Previous experience working in Agile/Scrum development environments
• Additional Backend Frameworks: Experience with other backend frameworks beyond Spring Boot
• Advanced Java: Deep knowledge of newer Java features, concurrency, performance optimization
• Microservices Architecture: Experience designing and implementing microservices-based systems
• Additional Cloud Platforms: Familiarity with AWS or GCP in addition to Azure
• Database Technologies: Strong SQL and NoSQL database experience
• API Design: Advanced RESTful API design skills and best practices
• DevOps Practices: Understanding of DevOps culture, deployment automation, and monitoring
• Security Best Practices: Knowledge of secure coding practices and PCI-DSS compliance for payments
• Mentorship: Track record of mentoring junior developers

Location: Remote Portugal (100% Remote)