---
title: 'Senior Machine Learning Engineer at Index Exchange'
canonical: 'https://feeny.ai/job/senior-machine-learning-engineer-index-exchange-toronto-fk3axhg8hyfe'
type: 'job'
last_seen: '2026-10-17'
---

# Senior Machine Learning Engineer at Index Exchange

- **Company:** Index Exchange
- **Location:** Toronto, Canada
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-04-30
- **Last confirmed live:** 2026-10-17
- **Apply:** https://jobs.gem.com/index-exchange/am9icG9zdDo26GIpP0skuj1rvTKTuTct

## Job description

At Index Exchange, we’re reinventing how digital advertising works—at scale. As a global advertising supply-side platform, we empower the world’s leading media owners and marketers to thrive in a programmatic, privacy-first ecosystem.

We’re a proud industry pioneer with over 20 years of experience accelerating the ad technology evolution. Our proprietary tech is trusted by some of the world’s largest brands and media owners and plays a crucial role in keeping the internet open, accessible, and largely free.

We process more than 550 billion real-time auctions every day (in comparison, Google processes 8.5 billion searches per day) with ultra-low latency. Our platform is vertically integrated from servers to networks and runs primarily on our own metal and cloud infrastructure. This end-to-end infrastructure is designed to provide both stability and agility, enabling us to adapt quickly as the market evolves.

At the core of it all is our engineering-first culture. Our engineers tackle internet-scale problems across tight-knit, global teams. From moving petabytes of data and optimizing with AI to making real-time infrastructure decisions, Indexers have the agency and influence to shape the future of advertising. We move fast, build thoughtfully, and stay grounded in our core values.

About the role:

We’re looking for a Senior Machine Learning Engineer who can bring their depth and breadth of experience in applied data science and optimization at industry scale to help guide our Index-wide technology strategy for machine learning and optimization, and to drive pragmatic execution and iterative improvement of the same.

What we are looking for:

- Design and implement enterprise-scale MLOps systems and platforms (including data ingestion, feature pipelines, model training, validation, deployment and monitoring), setting standards for high-performance ML products.
- Productionalize and support scalable and efficient Machine Learning models and solutions.
- Define and enforce standards for model lifecycle management, including versioning, monitoring, alerting, traceability and highly available low-latency inference systems.
- Refine and contribute to advanced data management strategies, optimizing for performance given extensive data loads.
- Mentor teams and provide guidance for machine learning engineering deployment practices, promoting a culture of excellence.
- Navigate complex problem-solving situations, contributing to decisions that affect the broader business's strategic direction.
- Utilize CI/CD best practices to ensure the enterprise keeps with innovative practices and remains efficient, through engagement with ML and MLOps evolution outside of the organization.
- Enable safe deployment strategies like shadow, canaries & gradual rollout

Here's what you need:

- Advanced degree in Computer Science, Engineering, or a related field, or equivalent experience.
- Expertise in high-performance backend technologies, preferably including Golang.
- Extensive experience with cloud and/or on-premises distributed systems, data-intensive applications, and large-scale backend system design.
- Deep knowledge of machine learning operationalization, including current trends, tools, and frameworks.
- Proven problem-solving prowess, capable of pioneering novel solutions to sophisticated technical challenges.
- Experienced in software development, deployment, and continuous improvement of complex CI/CD pipelines.
- A love of technology, or thirst for knowledge, or curiosity about the world, or a desire to solve the hardest problems.

Why you’ll love working here:

- Comprehensive health, dental, and vision plans for you and your dependents
- Paid time off, health days, and personal obligation days plus flexible work schedules
- Competitive retirement matching plans
- Equity packages
- Generous parental leave available to birthing, non-birthing, and adoptive parents
- Annual well-being allowance plus fitness discounts and group wellness activities
- Commuter benefits and discounts, where available
- Employee assistance program
- Mental health first aid program that provides an in-the-moment point of contact and reassurance
- One day of volunteer time off per year and a donation-matching program
- Monthly town halls and regular community-led team events
- Multiple resources and programming to support continuous learning
- A workplace that supports a diverse, equitable, and inclusive environment – [learn more here](https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.indexexchange.com%2Fabout%2Fdiversity-equity-inclusion%2F&data=05%7C01%7C%7Cbd817b7937664bdeb2b008db095e285e%7Cb07c069022b843668d8d7b845d088e18%7C1%7C0%7C638114072223704542%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=I7VfjnjaTtyacfynF7cGU7TSsL32hK3xgUETeVqkB7E%3D&reserved=0)

## Equal employment opportunity

At Index Exchange, we believe that successful products are built by teams just as diverse as the audience who uses them. As such, we are committed to equal employment opportunities. We celebrate diversity of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or expression, or veteran status. Additionally, we realize that diversity is deeper than any status or classification—diversity is the human experience. For those who show grit, passion, and humility—Index will welcome you.

Accessibility for applicants with disabilities Index Exchange welcomes and encourages individuals with disabilities to apply to work with us. If you require an accommodation, please share the details of your request and any information how we can assist you with the hiring recruiter when they contact you. Index Exchange will make reasonable efforts to ensure accommodation requests are met throughout the recruitment process.

Index everywhere, Index anywhere Our corporate headquarters are in Toronto, with major offices in New York, Montreal, Kitchener, London, Berlin, San Francisco, and many other global cities. As a major global advertising exchange, we are committed to operating as a tightly knit global team and embracing and empowering talent wherever our colleagues may be.

## #LI-ONSITE

## About Index Exchange

## Company Overview
- **One-liner**: Index Exchange is a global advertising supply-side platform (SSP) that enables media owners to maximize the value of their content and helps marketers reach consumers across any screen and ad format.
- **Entity Type**: Private (Privately Held)
- **Headquarters**: Toronto, Ontario, Canada
- **Founded**: 2003
- **Founders**: Not publicly available in current sources

## Core Business
- **Primary Industry**: Advertising Technology (Ad Tech) / Programmatic Advertising
- **Target Customers**: B2B — media owners, publishers, advertisers, brands, agencies, and demand-side platforms (DSPs)
- **Mission**: To build a safe and transparent omnichannel marketplace that provides a trusted experience for consumers, while upholding the integrity of the programmatic ecosystem.

## Products & Services
- **Index Exchange SSP**: The core supply-side platform that lets media owners manage and sell their ad inventory programmatically across display, video, mobile, and other formats.
- **Index Cloud**: A neutral compute environment for decisioning closer to when impressions originate. It allows partners to deploy their own models, data, and logic in isolated infrastructure adjacent to the transaction, reducing latency and signal loss while maintaining the autonomy of the public cloud.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Annual Revenue — USD $130M (per LinkedIn)
- **Notable Investors/Partners**: Not disclosed; however, the company has made acquisitions including RiVR (June 2022) and several international entities (Index Exchange Italy, Germany, UK, USA). Talent sources and alumni include Google, Amazon, The Trade Desk, Criteo, and StackAdapt.
- **Growth Signals**: 520 employees (+4.3% YoY), operates in 8 countries with workforce distributed across 15 countries, 27 active job postings as of the latest data, and the recent launch of Index Cloud.

## Competitive Advantages
- Radically transparent business practices and a focus on total market efficiency
- Over 20 years of experience in ad technology innovation
- Global omnichannel marketplace connecting publishers and brands across all screens
- Proprietary technology, including the neutral compute environment of Index Cloud
- Strong engineering and product organization (250+ product and tech employees)

## Why Work Here
- **Hybrid Work**: Employees come into the office Tuesday–Thursday, with remote work on Monday and Friday; exceptions available. Employees can also work from anywhere four weeks per year.
- **Compensation & Benefits**: Company equity, 401(k), disability insurance, dental insurance, and mental health benefits (including an employee assistance program and trained Mental Health First Aiders).
- **Parental Leave**: 100% of wages paid to birthing parents for up to 26 weeks, with an option for six additional unpaid months; support for adoptive and non-birthing parents; post-parental leave return-to-work program.
- **Work-Life Balance**: Flexible schedules, $50/month wellness stipend, and 20–30 days of PTO plus company holidays.
- **Culture & Development**: Bi-weekly global town halls, open office layout, job training and conferences, and employee resource groups (Index Black, Index Diversability, Index Pride, Index Women).
- **Employer Rating**: 4.0/5.0 on LinkedIn (301 reviews) — Work-Life 4.2, Compensation 4.3, Culture 4.0, Career 4.0.

## Sources
1. [indexexchange.com](https://www.indexexchange.com/)
2. [builtin.com](https://builtin.com/company/index-exchange)
3. [builtin.com - Benefits](https://builtin.com/company/index-exchange/benefits)
4. [ca.indeed.com](https://ca.indeed.com/cmp/Index-Exchange-1/about)
5. [linkedin.com](https://www.linkedin.com/company/index-platform/life)

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