Sr. Full Stack Engineer

Unity; Montreal; On-site; CAD 125,000 - 176,000; Full time

Benefits offered by this job

Equity awards

Discretionary bonuses

Sales commissions

Health, life and disability insurance

Retirement plans

Generous vacation and personal time

Job summary

Unity is seeking a Senior Full-Stack Engineer for the Unified Ads Platform in Montreal. You will own the service layer for advertiser/publisher data, designing contracts, and ensuring correctness across adjacent systems.

You’ll work on APIs, data modeling, and event-driven integrations with Kafka and Pub/Sub, plus delivering user-facing experiences in React. The role offers ownership from development through production operations and a potential leadership path.

Qualifications

• 6+ years building and operating production software with backend & frontend depth.
• Advanced TypeScript and modular Node backend frameworks.
• Strong data modelling and SQL with stable APIs.
• Event-driven systems with Kafka or Pub/Sub.
• Advanced React with performant UI in data-heavy apps.
• Cloud-native operation on Kubernetes with on-call ownership.
• Strong ownership mindset focused on reliability and maintainability.

Responsibilities

• Design, build, and operate services in our TypeScript platform (NestJS) across a large domain model, owning APIs and data contracts.
• Model entity data for scale and migrations across tables used by serving, billing, and reporting.
• Design and build event-driven integrations with Kafka and Pub/Sub, using transactional outbox and idempotent consumers.
• Deliver the user-facing surfaces on top of the platform in React and TypeScript for advertisers and publishers.
• Operate what you build on Kubernetes and own the service's SLOs in production.
• Drive observability, metrics, and testing frameworks across the platform.
• Set coding standards and mentor engineers through design reviews and partnerships.

Skills

Advanced TypeScript

Advanced React

Kubernetes

Kafka / Pub/Sub

SQL

Data modelling

Ownership mindset

Tools

NestJS

Kafka

Google Cloud Pub/Sub

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

La vie chez Unity

Unity [NYSE : U] est le premier moteur de jeu au monde, propulsant les expériences de plus de 3 milliards d’utilisateurs(rices) chaque mois. Les plus grands jeux mobiles, les titres indépendants PC les plus populaires, des jeux console parmi les plus innovants, ainsi que la quasi‑totalité des principales expériences XR et jeux Web sont développés, déployés et optimisés avec Unity.

Unity accompagne également des équipes dans des secteurs tels que l’automobile, l’industrie manufacturière et la santé pour concevoir, simuler et collaborer en 3D - comblant ainsi l’écart entre les idées et la réalité. Pour plus d’informations, veuillez visiter www.unity.com .

Unity est un employeur fier de garantir l’égalité des chances. Nous nous engageons à favoriser un environnement inclusif et innovateur et à célébrer nos employés à travers l’âge, l’éthinicité, la couleur, l’origine nationale, la religion, le handicap, le sexe, l’identité ou l’expression de genre, l’orientation sexuelle ou tout autre statut protégé conformément à la loi applicable. Si vous êtes en situation de handicap ou avez des besoins spécifiques nécessitant des aménagements pour que votre entretien se déroule dans les meilleures conditions, nous vous invitons à remplir ce formulaire afin de nous en informer et que nous puissions faire le nécessaire.

Ce poste exige que son ou sa titulaire possède une connaissance de l’anglais qui soit suffisante pour lui permettre d’avoir des échanges professionnels verbaux et écrits dans cette langue, puisque l’accomplissement des tâches liées à ce poste nécessite des communications fréquentes et régulières avec des collègues et partenaire situés à l’échelle mondiale et dont la langue commune est l’anglais.