Sr. Full Stack Engineer

LE140 Unity Technologies Canada Company; Montreal; On-site; CAD 135,000 - 176,000; Full time

Benefits offered by this job

Health insurance

Employee stock ownership

Retirement plans

Paid time off

Job summary

Unity Technologies is seeking a Senior Full-Stack Engineer to own the service layer for the Unified Ads Platform. You will design stable data contracts, model scale‑out data, and own APIs across serving, billing, and reporting. You’ll bridge backend systems with rich React frontends and manage production reliability on Kubernetes.

The role emphasizes ownership, data correctness, and collaboration with cross‑functional teams, with a potential path to Tech Lead Manager as the team grows.

Qualifications

• 6+ years building and operating production software with backend and frontend depth.
• Advanced TypeScript and modular Node frameworks like NestJS.
• Strong data modelling and SQL with scalable schema design.
• Experience with event-driven systems (Kafka, Pub/Sub).
• Advanced React with data‑heavy interfaces and performance focus.
• Cloud-native ops on Kubernetes, including deployment and on‑call readiness.
• Ownership mindset with testing, reviews, and long-term maintainability.

Responsibilities

• Design, build, and operate services in a TypeScript platform across a large domain model, owning APIs and data contracts.
• Model entity data for scale, including migrations and schema evolution read by multiple systems.
• Design and build event-driven integrations with Kafka and Pub/Sub for cross‑service consistency.
• Deliver user-facing surfaces in React/TypeScript, transforming data into trustworthy workflows.
• Operate services on Kubernetes with ownership of deployment, scaling, monitoring, and incident response.
• Drive observability and quality with tracing, metrics, and tests; set and enforce design and code standards.
• Mentor engineers, promoting best practices and cross-team alignment.

Skills

TypeScript

NestJS

React

SQL

Kafka

Kubernetes

OpenTelemetry

Terraform

Tools

Kafka

Pub/Sub

Terraform

NestJS

Kubernetes

Job description

The opportunity

At Unity, we're building a world-class advertising platform that operates at a massive global scale.

The Ads team powers the systems that connect advertisers with creators and players, driving performance, reliability, and growth across our ecosystem.

As a Senior Full-Stack Engineer on the Unified Ads Platform team, you'll own the service layer where advertiser and publisher entities live.

Campaigns and budget caps, applications and ad units, creative packs and the moderation pipeline behind them, offerwall currency, A/B tests, LevelPlay integration.

These are the records the rest of the ads estate reads from, and our APIs are the source of truth for them across serving, billing, and reporting.

This role goes beyond building an API and moving on.

The data you model is consumed by systems you don't own, in paths where a wrong value costs money.

You'll design contracts that stay stable as the product changes, keep state consistent across service boundaries, and own the correctness and availability of all of it in production.

This role is ideal for someone strong on both sides of the stack who thinks in terms of data contracts and correctness, and who wants real ownership of systems other engineering teams depend on.

As the team grows, this role has a path to evolve into a Tech Lead Manager position.

What you'll be doing

• Design, build, and operate services in our TypeScript platform (NestJS) across a large domain model, owning the APIs and data contracts that downstream ads systems depend on
• Model entity data for scale and change — relational schema design, migrations, and schema evolution against tables that serving, billing, and reporting all read from
• Design and build event-driven integrations with Kafka and Google Cloud Pub/Sub, using patterns such as transactional outbox and idempotent consumers to maintain consistency across service boundaries
• Deliver the user-facing surfaces on top of the platform in React and TypeScript, turning dense entity and performance data into workflows publishers and advertisers can trust
• Operate what you build on Kubernetes, where the service declares its own cloud infrastructure alongside its code, and take real ownership of its SLOs
• Drive observability and quality across the platform — distributed tracing, metrics, and testing frameworks
• Set the standards for how the service is built and hold the line on them in design and code review, mentoring engineers as you go

What we're looking for

• 6+ years building and operating production software, with real depth on both backend services and modern frontend
• Advanced TypeScript, and experience with an opinionated, modular Node backend framework — NestJS, or comparable dependency-injection and module architectures
• Strong data modelling and SQL — schema design, migrations, and performance at scale, alongside the API versioning judgment that goes with it
• You've had to change something other teams read from, safely
• Event-driven systems — Kafka, Pub/Sub, or similar. You understand delivery semantics, ordering, and idempotency, and what happens when two systems disagree
• Advanced React, with strong judgment around component design, state management, and performance in data-intensive interfaces
• Cloud-native operation — containerized services on Kubernetes, and comfort owning the system in production, including deployment, scaling, monitoring, incident response, and on-call
• Strong ownership mindset — focused on correctness, observability, and long-term maintainability, backed by real engineering discipline in testing, review, and accessibility
• You might also have Background in ads, attribution, billing, or monetization systems
• Infrastructure-as-code experience — Kubernetes-native resource management, Terraform, or service mesh
• Familiarity with OpenTelemetry and distributed tracing in production
• Experience with design systems or configuration-driven UI frameworks
• Exposure to cross-team technical alignment or guild-style quality initiatives

Additional Information

Zone A: $135,400 - $175,900 Zone B: $125,300 - $162,800 Cette fourchette correspond au salaire de base prévu pour ce poste. En plus du salaire de base, ce poste peut donner droit à des attributions d’actions et à une participation à nos programmes d’incitation de l’entreprise, comme des primes annuelles discrétionnaires ou des commissions de vente. Le montant final de l’offre dépendra de plusieurs facteurs, notamment l’emplacement géographique ainsi que l’expérience pertinente, le parcours professionnel et les compétences du/de la candidat(e). This range reflects the anticipated base salary for this position. Beyond base salary, this role may be eligible for equity awards and participation in our company incentive plans (such as annual discretionary bonuses or sales commissions). The final offer amount will depend on several factors, including geographic location and the candidate’s relevant experience, professional background, and skill set.

Avantages

Chez Unity, nous voulons que nos membres d’équipe s’épanouissent. Nous offrons un large éventail d’avantages conçus pour soutenir le bien‑être et l’équilibre travail‑vie personnelle. Veuillez noter: L’admissibilité aux avantages, les offres spécifiques et la couverture varient selon le pays et le statut d’emploi. Bien que les avantages précis puissent varier, voici certaines des façons dont nous nous efforçons de prendre soin de nos membres d’équipe admissibles à l’échelle mondiale : assurance santé, vie et invalidité complète | Subvention pour les déplacements | Participation des employés à l’actionnariat | Régimes de retraite/pension compétitifs | Vacances et congés personnels généreux | Soutien aux nouveaux parents grâce à des congés et des programmes de soutien aux familles | Collations offertes au bureau | Programmes et soutien en matière de santé mentale et de bien‑être | Groupes‑ressources pour employés | Programme mondial d’aide aux employés | Programmes de formation et de perfectionnement | Programme de bénévolat et de jumelage de dons

Benefits

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. Please note: Benefits eligibility, specific offerings, and coverage vary based on the country and employment status. 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 Well‑being programs and support | Employee Resource Groups | Global Employee Assistance Program | Training and development programs | Volunteering and donation matching program

Life at Unity

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. For more information, please visit www.unity.com. 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 law. Our differences are strengths that enable us to support the growing and evolving needs of our customers, partners, and collaborators. If you have a disability that means there are preparations or accommodations we can make to help ensure you have a comfortable and positive interview experience, please fill out this form to let us know. This position requires the incumbent to have a sufficient knowledge of English to have professional verbal and written exchanges in this language since the performance of the duties related to this position requires frequent and regular communication with colleagues and partners located worldwide and whose common language is English. 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. At Unity, we’re committed to creating a workplace that fosters collaboration and teamwork that allows you to harness your unique skills. Join us in creating industry tools to help creators of all levels bring their projects to reality. Learn more about our culture and values, and get a head start by reading about how our hiring process works.