Staff Backend Developer, Unity Ads Développeur Backend Principal, Unity Ads

Unity Technologies; Toronto; On-site; CAD 100,000 - 130,000; Full time

Job summary

A leading technology company is seeking a Staff Backend Developer to join their Ads team in Toronto. This role involves optimizing performance and maintaining the backend systems that support their global advertising platform. You will design and modernize services, collaborate across teams, and handle real-time ad requests. Ideal candidates have experience in Golang and building scalable services. Competitive benefits are offered to support work-life balance.

Benefits

Wide range of employee benefits

Qualifications

• Experience building backend services at scale.
• Proficiency in Golang and relational databases.
• Familiarity with cloud infrastructure and observability tools.

Responsibilities

• Design, build and modernize backend services and APIs.
• Work on scalable, high-availability systems.
• Collaborate with teams to deliver new features.

Skills

Building backend services at scale

Proficiency in Golang

Relational databases (e.g. MySQL)

Cloud infrastructure knowledge

Observability tools (Kubernetes, Ray)

API design understanding

Distributed systems knowledge

Strong collaboration skills

Tools

Kubernetes

Ray

Terraform

Job description

Overview

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 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

We offer a wide range of benefits designed to support employees’ well-being and work-life balance. You can read more about them on our career page.

Unity is an 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 law. If you have a disability that requires accommodations, please let us know so we can provide support during the interview process.

This position requires the incumbent to have a sufficient knowledge of English to have professional verbal and written exchanges in this language, since the duties related to this position require frequent and regular communication with colleagues and partners located worldwide and whose common language is English.

Unity does not accept unsolicited resumes or agency submissions. We are committed to protecting privacy and encourage you to review our Prospect Privacy Policy and Applicant Privacy Policy.

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