Senior Java Developer

About the Role

Sigma Software is seeking a Senior Java Developer to join a team building a large-scale marketplace platform used by millions of customers worldwide. You will apply distributed systems, cloud-native technologies, and event-driven architecture to evolve a modern E-commerce ecosystem for our pet-products marketplace.

The project focuses on development and optimization of a high-performance marketplace platform designed to enhance the online shopping experience. The team manages catalogs, pricing, inventory, suppliers, and related operational services within a large-scale distributed ecosystem leveraging event-driven architecture and multi-cloud infrastructure. What You'll Do

• 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 What We're Looking For

• 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 Nice to Have

• Understanding of high-load system optimization within the E-commerce domain Compensation & Benefits