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Development Engineer at Horizontal Talent Development Engineer at Horizontal Talent in East Bethel, Minnesota Posted in 4 days ago. $33.00 - $67.00 per hour Step into a senior engineering role where you'll help shape scalable backend platforms that support high-performance digital advertising solutions. This opportunity is ideal for a hands-on technologist who enjoys solving complex problems, driving technical excellence, and partnering across teams to build resilient systems. Responsibilities Design, build, and support scalable backend services using Kotlin and modern microservices architecture Contribute to technical architecture decisions, design reviews, code reviews, testing, and debugging efforts Evaluate emerging technologies and tools through proof-of-concept work with attention to performance, scalability, maintainability, and long-term value Collaborate with cross-functional partners to create clear system designs, process flows, and implementation plans Provide technical guidance and mentorship to engineers while promoting best practices across the development lifecycle Strengthen system reliability, resiliency, and disaster recovery planning Support data quality standards across ingestion, processing, storage, and operational workflows Advocate for automation, continuous improvement, and strong engineering practices Skills Strong hands-on production experience developing in Kotlin Experience with Java/J2EE and RESTful API development Background building and deploying microservices with Spring Boot Solid understanding of distributed systems and scalable backend architecture Experience working in a monorepo development environment Familiarity with databases such as Cassandra, MongoDB, PostgreSQL, or Elasticsearch Experience with Kafka or similar messaging and event streaming platforms Working knowledge of testing frameworks such as JUnit and Mockito Experience with observability and monitoring tools such as Logstash, Elasticsearch, Kibana, and Grafana Comfort with DevOps practices, CI/CD pipelines, and automated deployments Strong communication, collaboration, and technical presentation skills Preferred Skills Experience in AdTech environments, including DSPs, SSPs, or ad servers Python development experience Knowledge of workflow orchestration or data pipeline tools such as Oozie Experience designing solutions that align with digital advertising and business goals Horizontal is committed to fostering an inclusive workplace where diverse perspectives are valued, respected, and empowered to contribute. We encourage candidates from all backgrounds to apply and be part of a collaborative environment built on equity, belonging, and opportunity. 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 $33 - $67 per hour based on qualifications and experience.