Staff Backend Developer, U-Ads

The opportunity

Unity is looking for a Staff Backend Developer to join our Unity Ads team, where we build the real-time systems that power Unity’s global advertising platform. This is a high-scale, low-latency environment — processing billions of requests daily to deliver fast, relevant ads to players around the world. Our backend infrastructure is designed for reliability and scalability, ensuring seamless ad delivery and optimal performance even under heavy traffic. As part of the team, you will work on distributed systems that handle real-time ad requests, impression tracking, and user data analytics with strict requirements for uptime and security. You'll play a critical role in optimizing performance, maintaining service availability, and supporting the development of new monetization features for game developers worldwide. Security, data privacy, and a positive user experience are central to everything we build.

You’ll help modernize the legacy tech stack and the core services behind ad delivery, bidding, reporting, and analytics. This is a great opportunity for an engineer who’s excited to work on performance-critical systems, collaborate across teams, and grow in a fast-paced environment, all at a turning point in the company.

What you'll be doing

Design, build, and modernise backend services and APIs that support ad delivery

Work on scalable, high-availability systems used across Unity’s ads ecosystem

Collaborate with engineers, product managers, and data teams to deliver new features

Improve performance, observability, and cost-efficiency of current backend systems, modernising the legacy stack

Contribute to architectural decisions and technical direction of the platform

What we're looking for

Experience building backend services at scale

Proficiency in Golang, and relational databases (e.g., MySQL)

Familiarity with cloud infrastructure and observability tools (Kubernetes, Ray, etc.)

Understanding of API design, distributed systems, and system reliability

Strong collaboration and communication skills in a remote-first team environment

You might also have

Experience in ad tech, programmatic advertising, or real-time bidding systems

Background with infrastructure-as-code (e.g., Terraform)

Familiarity with networking, caching, or real-time data pipelines

Additional information

Relocation support is not available for this position

Work visa/immigration sponsorship is not available for this position

Life at Unity

Unity [NYSE: U] is the world’s leading game engine, powering play for more than 3 billion consumers each month. The top mobile games in the world, the most played PC indie titles, the most innovative console games, and virtually all of the top XR and Web Games are developed, deployed, and grown in Unity. Unity also enables teams across industries like automotive, manufacturing, and healthcare to design, simulate, and collaborate in 3D — closing the gap between ideas and reality. For more information, please vi