Back End Developer III - Java

Back End Developer III - JavaLocation: Richfield, MN (In office 1x week) Duration: 2/24/2027 + Ext. Top Skills: Developing Java/Spring web applications Aggressive refactoring High comfort level with Unix/Linux command line Object Oriented Programming and Service Oriented Architecture design The Retail Media Network (RMN) is responsible for enabling advertisers to promote products across our digital ecosystem, including web and mobile platforms. RMN drives monetization by delivering sponsored ads, managing campaign performance, optimizing targeting, and ensuring accurate reporting and billing. The department works cross-functionally with Ads, Payments, Analytics, and Platform teams to provide a seamless advertiser experience. Project Description: The Billing team within RMN owns the end-to-end billing lifecycle for sponsored campaigns. This includes: Budget management and allocation Spend tracking and reconciliation Revenue calculations Invoice generation and adjustments Integration with Payments and Finance systems Real-time and near-real-time spend reporting The team ensures financial accuracy, transparency, and scalability of the billing platform while supporting high-volume ad delivery. Position Summary/Job Description: In this role, they will be a critical member of the team building the foundation for Best Buy's next generation web platform. They will support and extend running applications & assist in the design and development of new applications. They will be expected to evaluate and refactor in a rapid manner for every part of our infrastructure. Overall knowledge of designing an application to run on a scalable platform is expected. You will be working in an agile environment which means test-driven development and pair programming. We are evolving towards a dev/ops model, with our development teams engaged in monitoring, optimizing and supporting our production environments. We have many projects running in parallel including Cloud technologies, Infrastructure automation, and SOA REST based web applications. Skills Overview: 7-10 years of relevant application software development experience Test-Driven Development Strong Spring knowledge Developing Spring/Java/Groovy/Maven applications Experience in developing/consuming REST Services – Absolute Must Object-oriented programming and experience with working knowledge of Design Patterns Experience with emergent design and paired programming High comfort level with Unix/Linux command line Strong unit-testing skills (Junit/Spock in particular) Comfortable with database (DB) and Kafka-related development, including design, implementation, troubleshooting, and performance optimization. Experience with large-scale distributed systems and client-server architectures Able to participate in the planning process: take high level design discussions and create user stories, then further break those stories into tasks.