Senior Backend Engineer

Tubi; Toronto; On-site; CAD 85,000 - 115,000; Full time

Job summary

A leading streaming platform is seeking a Senior Backend Engineer to design and operate scalable backend systems for personalized advertising experiences. The role requires 5 years of experience, preferably in Elixir or Golang, and involves building microservices and implementing resilience patterns. The ideal candidate will optimize system performance and participate in incident response, while working in a dynamic ad tech ecosystem.

Benefits

Flexible Time Off Policy

Generous Parental Leave Program

Monthly wellness reimbursement

Qualifications

• 5 years of experience building production backend services preferably in Elixir or Golang.
• Strong knowledge of distributed systems concurrency and performance profiling.
• Hands-on experience with cloud platforms (AWS), Kubernetes and Infrastructure-as-Code (Terraform).
• Experience with CI/CD pipelines and operational excellence.

Responsibilities

• Design and operate scalable backend systems for ad delivery workflows.
• Ensure high availability and drive performance optimization.
• Build microservices to power the SGAI system.
• Implement resilience patterns to ensure reliability.
• Profile backend services and optimize memory/CPU utilization.
• Participate in on-call rotations and incident response.

Skills

Building production backend services

Distributed systems knowledge

Performance profiling

Cloud platforms (AWS)

Kubernetes

Infrastructure-as-Code (Terraform)

Proficiency with PostgreSQL

Proficiency with Redis

Job description

About Tubi :

Boldly built for every fandom Tubi is a free streaming service that entertains over 100 million monthly active users. Tubi offers the worlds largest collection of Hollywood movies and TV shows thousands of creator-led stories and hundreds of Tubi Originals made for the most passionate fans. Headquartered in San Francisco and founded in 2014 Tubi is part of Tubi Media Group a division of Fox Corporation.

At AdRise we build cutting-edge advertising capabilities for Tubi and across the Fox portfolio of brands across Sports Entertainment and News and including Fox One the new direct to consumer streaming service.

Before streaming became industry standard AdRise powered Tubis growth from the ground up by developing real-time ad delivery and dynamic targeting infrastructure that scaled to serve hundreds of millions. That same tech foundation is now fueling FOXs cross-portfolio monetization strategy. Put simply we are creating the most efficient intelligent and transparent advertising ecosystem in the world starting with streaming.

We are enhancing the in-house ad tech stack by optimizing server-side delivery building ML-driven targeting systems and enabling content-personalized ad experiences that respond to what viewers actually watch. From real-time decisioning to data collaboration with AWS and Databricks we are creating a smarter more dynamic ad tech ecosystem. The problems are complex the visibility is high and the platform is built for impact. If you want to work at the center of streaming monetization on systems that touch hundreds of billions of impressions and shape the next generation of personalized advertising this is your platform.

About the Role

We are seeking a Senior Backend Engineer to build SGAI (ServerGuided Ad Insertion) services that power personalized advertising experiences. SGAI enables personalized ad delivery in streaming services. You will design and operate scalable backend systems that coordinate ad delivery workflows ensure high availability and drive performance optimization across our streaming platform.

Service Architecture & Reliability

• Design build and scale microservices to power the SGAI system.
• Own service availability p99 latency and throughput SLOs; drive autoscaling and capacity planning for high-traffic systems.
• Deploy and operate services on Kubernetes with rolling / canary rollouts and HPA-based autoscaling.
• Design inter-service APIs using gRPC (protobuf); ensure backward-compatible schemas deadlines and retries.
• Implement resilience patterns including idempotency retries timeouts fallbacks rate limiting and circuit breakers to ensure reliability.

Performance & Scale

• Profile backend services identify bottlenecks and optimize memory / CPU utilization. Design and implement caching strategies and leverage Redis / CDNs to reduce latency and improve efficiency.
• Architect scalable workflows using queues and streams to handle traffic bursts and asynchronous operations.

Observability & Operations

• Build comprehensive observability into services through metrics tracing and structured logging.
• Define and maintain SLIs / SLOs set actionable alerts and ensure system reliability through robust monitoring.
• Participate in on-call rotations and incident response; lead postmortems and drive long-term fixes.

Security & Compliance

• Implement secure authentication / authorization secret management and data privacy best practices.
• Enforce URL signing / encryption for playback session and ad endpoints to protect access.

Qualifications

• 5 years of experience building production backend services preferably in Elixir or Golang. Strong knowledge of distributed systems concurrency and performance profiling. Hands-on experience with cloud platforms (AWS) Kubernetes and Infrastructure-as-Code (Terraform).
• Proficiency with datastores such as PostgreSQL and Redis.
• Experience with CI / CD pipelines automated testing and operational excellence in production environments.

Preferred Qualifications

• Domain expertise in ads or streaming technologies (e.g. SCTE-35 VAST / VMAP CDN integration HLS / DASH SSAI SGAI).
• Experience leading incident response chaos / failure testing and resilience engineering practices.
• Track record of cost optimization and performance tuning at scale.

Benefits

• Tubi is a division of Fox Corporation and the FOX Employee Benefits summarized herecovers the majority of all US employee following distinctions below outline the differences between the Tubi and FOXbenefits.
• For US-based non-exempt Tubi employees the FOX Employee Benefits summary accurately captures the Vacation and Sick Time.
• For all salaried / exempt employees in lieu of the FOX Vacation policy Tubi offers a Flexible Time off Policy to manage all personal matters.
• For all full-time regular employees in lieu of FOX Paid Parental Leave Tubi offers a generous Parental Leave Program which allows parents twelve (12) weeks of paid bonding leave within the first year of birth adoption surrogacy or foster placement of a child in addition to applicable government leave program(s) and FOXs short-term disability policy. This time is 100% paid through a combination of any applicable state city and federal leaves and wage-replacement programs in addition to contributions made by Tubi.
• For all full-time regular employees Tubi offers a monthly wellness reimbursement.

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race color religion sex national origin gender identity disability protected veteran status or any other characteristic protected by law. We will consider for employment qualified applicants with criminal histories consistent with applicable law.

Required Experience :

Senior IC

Key Skills

• Business Intelligence
• Bidding
• Accounts Assistant Credit Control
• Account Development
• Content Development
• Lab Testing

Employment Type: Full Time

Experience: years

Vacancy: 1