Senior/Software Engineer II, Backend
Core
Build and operate reliable, scalable backend systems for Duolingo's ad serving, mediation, demand, and in-product ad formats to fund the company's educational mission.
Role type
Senior Backend Engineer (Product Engineering)
Builds
Ad serving, mediation, demand systems, and in-product ad formats
Domain
EdTech / Advertising Technology
Deliverable
production ML models | product features
Required skills
Java, Python, or Kotlin; data structures and algorithms; software design; database technologies
Preferred skills
high-traffic API development; public cloud providers; observability tools (OpenTelemetry, Grafana, Prometheus, DataDog)
Technologies
Java, Python, Kotlin, OpenTelemetry, Grafana, Prometheus, DataDog
Responsibilities
Collaborate on software projects with product design and backend aspects; develop, release, and maintain backend services and/or infrastructure; lead individual project priorities and milestones
Seniority
Senior, hands-on IC
