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Sr. Back End Developer at Horizontal Talent Sr. Back End Developer at Horizontal Talent in Richfield, Minnesota Posted in 10 days ago. $42.00 - $80.00 per hour Join a high-impact Marketplace Shopping team focused on building scalable backend services that shape the pre-purchase experience for customers. This role offers the opportunity to design and deliver distributed systems that support product discovery, catalog and hierarchy management, ranking, fulfillment options, and other core shopping capabilities. Responsibilities Design, build, and maintain backend services that support marketplace shopping experiences and related platform capabilities Contribute to system architecture and technical design discussions for scalable, production-grade solutions Develop services that support product discovery, catalog management, hierarchy management, ranking, and fulfillment functionality Work across the full delivery lifecycle, from solution design through implementation and deployment Collaborate with team members to solve complex technical challenges in a fast-moving environment Help ensure services are reliable, efficient, and built to support high-scale usage Participate in ongoing improvements to performance, maintainability, and operational stability Skills 10 to 15 years of professional Java development experience Strong experience with Spring Boot and microservices architecture Deep understanding of system design and distributed systems Hands-on experience with Kafka and event-driven architecture Strong working knowledge of PostgreSQL or other relational databases Ability to independently design and deliver complex backend solutions Clear communication skills and a collaborative, solution-oriented mindset Experience working in production environments with scalable systems Preferred Skills Experience in marketplace, e-commerce, or retail environments Familiarity with Spring Cache Experience with GCP and BigQuery Background in performance tuning and optimization Experience owning large-scale production systems end to end Comfort working in environments with ambiguity and evolving requirements Horizontal is committed to fostering a diverse, equitable, and inclusive workplace where everyone feels valued, respected, and empowered to contribute. We welcome candidates from all backgrounds and encourage applicants who are excited to bring their unique perspectives and experience to the team. By applying for this position, you acknowledge and agree that Horizontal Talent may contact you regarding your application using automated technology, including phone calls, SMS/text messages, or email, which may be delivered by our virtual AI recruiter, Alex. Please apply through this online posting or by visiting our Job Board at www.horizontaltalent.com/job-board. Applications will be accepted for 4 weeks. For those that join the team, we offer competitive compensation and benefits including medical, dental, vision, and retirement. Check out all we have to offer and how you can become part of the Horizontal Talent Team. The pay range for this role is $42 - $80 per hour based on qualifications and experience.