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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Java Developer - **Company:** The Customer Company - **Location:** United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Amazon Web Services, Microsoft Azure, Program Optimization, Code Review, DevOps, Distributed Systems, Fault Tolerance, Apache HBase, MongoDB, NoSQL, Commercial Software, SQL Databases, Google Cloud, Data Storage Technologies, Cloud Platform System, ReactJS, System Availability, Delivery Pipeline, Spring-boot, Event Driven Architecture, Kubernetes, Low Latency, Cassandra, Apache Kafka, Graphql, Operational Systems, Video Streaming, Restful APIs, Amazon Redshift, Microservices - **Published:** July 9, 2026 - **Apply:** https://career.sigma.software/vacancy/senior-java-developer-24/ ## About the Role Java / expert Spring Boot / expert AWS / EKS / strong Kafka / strong English / strong, * 6+ years of commercial software development experience * Strong proficiency in Java development * Solid experience with Spring Boot and microservices architecture * Hands-on experience with Kafka or other event-streaming technologies * Experience designing and building scalable distributed systems * Practical knowledge of AWS services and Kubernetes / EKS * Strong understanding of event-driven architecture principles * Experience working with REST APIs * Knowledge of CI/CD pipelines and DevOps practices * Experience with SQL and NoSQL databases * Familiarity with AWS, Azure, or Google Cloud platforms * Strong analytical and problem-solving skills * Upper-Intermediate or higher English level * Strong communication and collaboration skills WILL BE A PLUS: * Experience with GraphQL * Understanding of high-load system optimization within the E-commerce domain ## Description We are looking for a Senior Java Developer with strong expertise in distributed systems, cloud-native technologies, and event-driven architecture to help evolve a modern E-commerce ecosystem. Customer Our Customer is an industry-leading marketplace specializing in pet products, with a strong online presence and a massive product catalog. The company focuses on delivering seamless digital shopping experiences through scalable technology solutions and reliable operational systems supporting millions of users and transactions. Project The project focuses on the development and optimization of a high-performance marketplace platform designed to enhance the online shopping experience. The team is responsible for core systems managing catalogs, pricing, inventory, suppliers, and related operational services. The platform is built as a large-scale distributed ecosystem leveraging event-driven architecture, cloud-native infrastructure, and multiple data storage technologies to ensure scalability, low latency, and fault tolerance across substantial data volumes. Key Technologies: Java, Spring Boot, React, REST APIs, Kafka, Distributed Systems, Event-Driven Architecture, HBase, Cassandra, MongoDB, Redshift, AWS, Google Cloud, Azure, * Design, develop, and maintain scalable distributed systems with high availability and low latency * Architect and implement APIs and event-driven solutions aligned with business requirements * Participate in the development of marketplace services related to catalog, pricing, and inventory management * Troubleshoot and resolve complex production issues across services and infrastructure * Develop and execute unit, integration, regression, and performance tests * Collaborate with cross-functional engineering, QA, and DevOps teams * Contribute to architectural decisions and system optimization initiatives * Ensure high code quality through code reviews and engineering best practices * Support cloud-native deployment activities within AWS environments ## Related Videos - [Kubernetes Native Java](https://www.wearedevelopers.com/videos/383-kubernetes-native-java) - [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis) - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Putting the Graph In GraphQL With The Neo4j GraphQL Library](https://www.wearedevelopers.com/videos/257-putting-the-graph-in-graphql-with-the-neo4j-graphql-library) - [Enterprise-Cloud-Native - Fast-Paced Development & Deployment in a Highly Secure Banking Environment](https://www.wearedevelopers.com/videos/671-enterprise-cloud-native-fast-paced-development-deployment-in-a-highly-secure-banking-environment) - [Tomorrow's cloud data platforms - fully managed database-as-a-service (DBaaS)](https://www.wearedevelopers.com/videos/254-tomorrow-s-cloud-data-platforms-fully-managed-database-as-a-service-dbaas) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Top 10 Java Libraries](https://www.wearedevelopers.com/magazine/364-top-10-java-libraries) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [93 Java Interview Questions You Should Prepare For](https://www.wearedevelopers.com/magazine/14-93-java-interview-questions-you-should-prepare-for) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)