Backend Engineer, ML Inference Systems

The opportunity

Every day, we connect billions of players with the games and experiences they love.

Our Vector Gamer AI team sits at the heart of that mission, governing ad ranking and bidding decisions across billions of daily impressions, where large‑scale machine learning and real‑world impact converge ’re hiring a Staff Backend Engineer to build and operate the infrastructure those models depend on. You’ll design and operate the distributed systems that power billions of daily decisions, with a focus on the performance, reliability, and scalability of inference systems.

Join us and help influence how billions of gaming experiences are discovered, monetized, and how creators are rewarded.

• Design, develop, and deploy production‑grade backend services and distributed systems powering large‑scale online model inference at billions of daily requests
• Drive technical direction of our inference platform, with a focus on low‑latency, high‑throughput serving infrastructure
• Partner with ML engineers to ensure online serving infrastructure scales with growing model complexity and inference volumes, without compromising latency or throughput
• Ensure the reliability, scalability, and efficiency of our systems in production using monitoring and observability tools like Prometheus and Grafana.
• Manage and optimise cloud infrastructure on GCP, orchestrating workloads with Kubernetes across a high‑scale production environment
• Promote and implement best practices for backend service development, testing, deployment, and monitoring (Dev Ops, SRE).

• 5+ years designing, deploying, and maintaining distributed systems at scale
• Expertise in Golang for building high-performance, low-latency backend infrastructure
• Hands‑on experience with cloud infrastructure on GCP and workload orchestration with Kubernetes
• Strong grounding in monitoring and observability tooling, including Prometheus and Grafana
• Experience in ad tech, recommender systems, real‑time personalization, or other performance‑critical domains
• Familiarity with microservice architectures, containerisation (Docker), and CI/CD best practices
• Familiarity with machine learning platforms, workflows, and serving infrastructure

• Experience with ML inference servers like NVIDIA Triton Inference Server.
• Familiarity with auction mechanics or bidding systems in an ad tech context.
• Experience embracing AI as a strategic advantage in engineering, following established best practices for code quality and security.

• Relocation support is not available for this position

At Unity, we want our team members to thrive. We offer a wide range of benefits designed to support well‑being and work‑life balance.

While specific benefits vary, here are some of the ways we strive to take care of our eligible team members globally:
Comprehensive health, life, and disability insurance | Commute subsidy | Employee stock ownership | Competitive retirement/pension plans | Generous vacation and personal days | Support for new parents through leave and family‑care programs | Office food snacks | Mental health and wellbeing programs and support | Employee resource groups | Global employee assistance program | Training and development programs | Volunteering and donation matching program

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.

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Unity is a proud equal opportunity employer. We are committed to fostering an inclusive, innovative environment and celebrate our employees across age, race, color, ancestry, national origin, religion, disability, sex, gender identity or expression, sexual orientation, or any other protected status in accordance with applicable…