Staff Backend Engineer, Offerwall

Unity Technologies•San Francisco, CA

10d•$200,400 - $260,500

About The Position

Offerwall by Unity is a leading mobile advertising and monetization platform that empowers game developers to maximize revenue and engage users through rewarded experiences. At the center of it is Offer Delivery, the backend service that decides which offer a player sees, when, and on what terms. It operates on two fronts: bidding in real time into video ad auctions as a DSP, and placing offers directly outside the auction flow. Both are high-throughput, latency-sensitive, and revenue-critical. We're seeking a Staff Software Engineer to be the technical leader for Offer Delivery. You will set the technical vision for the service, define its architecture, influence its roadmap, and drive delivery of it. You'll own how targeting rules are expressed and enforced in ad serving, and you'll coordinate closely with the auction, machine learning, platform, and product teams whose systems Offer Delivery sits between. As a technical leader on our Offerwall team, you will play a critical role in evolving our core monetization product, designing and implementing its next generation of technology. This is an exciting opportunity to lead impactful initiatives, architect robust solutions, and directly contribute to the financial success of countless mobile app developers and the engagement of millions of users globally. You will work at the intersection of rewarded advertising, advanced fraud prevention, and large-scale data processing, driving innovation that directly impacts our bottom line and industry leadership. Your solutions will foster stronger collaboration and integration with other Ads products at Unity. You will mentor and guide engineers as they design, build, and deploy web applications and services. You will also play a key role in designing backend technical solutions that focus on system performance, reliability, and delivering business value at scale.

Requirements

Track record of owning a significant backend system, setting direction, making the architectural calls, and getting it delivered through others as well as yourself.
Demonstrated ability to design and ship large-scale, highly available, latency-sensitive distributed services with complex business logic.
Strong proficiency in backend development using Go (or clear ability to become effective in it quickly).
Working knowledge of gRPC with a willingness to adapt to the best tool for the job.
Practical experience with observability platforms (logging, metrics, monitoring/tracing) and message bus technologies for managing complex data streams.
Proven track record of refactoring and redesigning existing systems to meet evolving product requirements and improve performance.
Experience driving technical work across team boundaries and developing the engineers around you.
Sufficient knowledge of English to have professional verbal and written exchanges in this language.

Nice To Haves

Experience building or operating a DSP, ad exchange, or real-time bidding system, and familiarity with OpenRTB.
Background in ad serving, auction mechanics, or programmatic advertising more generally.

Responsibilities

Lead the technical design and architecture for Offer Delivery services, features, and critical strategic initiatives, collaborating closely with senior engineers and managers.
Build, test, and operate the Golang services that power real-time bidding into video auctions (OpenRTB) and direct offer placement outside the auction flow.
Mentor engineers, set engineering standards, and foster a culture of technical excellence on the team.
Ensure seamless communication and collaboration with product, Ad Viewer, teams in a distributed environment.
Ensure the high availability and reliability of our production services, including participation in on-call rotations and proactive system monitoring.