Senior Back End Developer

Position: Senior Back End Developer III - AdTech Focus

Location: Richfield, MN (Hybrid - 1-2 days onsite per week preferred; remote considered)

Employment Type: Contract (7-12+ Months)

• Enhance seller-facing campaign management workflows.

• Integrate with external advertising platforms (e.g., Criteo) and ad-serving systems.

• Implement reporting, spend tracking, and billing event pipelines.

• Improve campaign synchronization and product eligibility systems.

• Modernize frontend and backend architecture for scalability and maintainability.

• 7-10 years of backend development experience.

• Strong expertise in Java/Kotlin and Spring Boot/Web Flux
  .

• Hands‑on experience with microservices and REST API development
  .

• Deep understanding of Kafka and event‑driven architecture.

• Knowledge of distributed systems, concurrency, and asynchronous processing.

• Strong SQL skills with Postgre
  
  SQL/MySQL performance optimization
  .

• Experience with
  Kubernetes, CI/CD, and cloud‑native applications
  .

• Production support, monitoring, and observability expertise.

• Strong debugging, problem‑solving, and cross‑team collaboration skills.

• Ability to independently own features/services end‑to‑end.

• Experience building scalable, high‑throughput systems.

Bonus

Skills:

• AdTech domain experience.

• Big Query/GCP exposure.

• Reactive programming.

• Familiarity with AI‑assisted development tools.