Skip to content
CV Rocket
Get started
How it worksThe enginePricingBlogContactSign in

Open nowPosted 92 days ago

Senior Full Stack Engineer, Client Platform

Penn Interactive33 open roles

Pay
CA$135,000 – CA$180,000 a year
Where
Canada, Remote
Work mode
Remote
Get the CV for this job

From $25 per CV, paid once. No subscription.

Your applicationOpen nowSenior Full Stack Engineer, Client PlatformPenn Interactive · Canada, Remote

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on Penn Interactive's own form.

The reply lands in your private mailbox

3×more interviews than doing it yourself with ChatGPT.

The clock on this job

Early applications get read.

13.4% of postings close within 7 days. Measured by our own scanner across the market. Penn Interactive postings stay open a median of 45 days.

Share of postings closed within
  1. 2.2%1 day
  2. 4.6%3 days
  3. 13.4%7 days
  4. 21.6%14 days
  5. 36.2%30 days
  6. 59.0%60 days
This job: posted 92 days ago

Penn Interactive median: 45 days open

The posting

PENN Entertainment, Inc. is North America’s leading provider of integrated entertainment, sports content, and casino gaming experiences. From casinos and racetracks to online gaming, sports betting and entertainment content, we deliver the experiences people want, how and where they want them.

We’re always on the lookout for those who are passionate about creating and delivering cutting-edge online gaming and sports media products. Whether it’s through Hollywood Casino, theScore Bet Sportsbook, or theScore media app, we’re excited to push the boundaries of what’s possible. These state-of-the-art platforms are powered by proprietary in-house technology, a key component of PENN’s omnichannel gaming and entertainment strategy.

When you join PENN Entertainment’s digital team, you’ll not only work on these cutting-edge platforms through theScore and PENN Interactive, but you’ll also be part of a company that truly cares about your career growth. We’re committed to supporting you as you expand your skills and explore new opportunities.

With locations throughout North America, you can build a future at PENN Entertainment wherever you are. If you want to challenge conventions in gaming, media and entertainment, we want to talk to you.

About the Team The Client Platform team's job is to make product teams fast. We own the shared component libraries and design system, the build and release tooling every engineer touches daily, and the performance, accessibility, and observability standards that hold across our client surfaces. Much of the work is internal tooling that keeps a large monorepo pleasant to work in. We partner closely with product teams to make the right thing the easy thing.

The team also builds our server-driven UI service, a TypeScript GraphQL subgraph that lets product teams change what the iOS, Android, and web clients render without shipping an app release. The role spans both the monorepo and that service, so it is a genuine mix of front-end and backend GraphQL work.

About the Work

  • Design and evolve GraphQL schemas in a federated graph, including the server-driven UI contracts our mobile and web clients render. Treat those schemas as a versioned contract shared with released mobile apps: classify breaking changes, coordinate migrations with the iOS, Android, and web leads, and keep generated client models in sync. Develop, scale, and optimize the GraphQL APIs, RPC endpoints, and SQL queries behind our web surfaces.
  • Build front-end applications and shared libraries with React and TypeScript. Build web applications that are fast and accessible to everyone.
  • Partner with product and design to architect and ship customer-facing features.
  • Use observability tooling to diagnose issues and improve the experience for guests. Set up and refine monitoring and alerting in DataDog for the systems you own.
  • Improve code quality by finding technical debt, proposing fixes, and holding the standard for the whole team.
  • Find bottlenecks and areas of risk in production, and drive the changes that make the platform scale.
  • Learn from and mentor teammates through code review, pairing, and writing things down.
  • Take part in the design, architecture, and delivery of new features in a collaborative agile team.
  • Write thorough tests for every feature and bug fix. Testing is a first-class discipline on this team.
  • Work with QA to strengthen automated testing pipelines and CI/CD workflows.
  • Use Claude Code in daily development to move faster without lowering the bar.
  • Other duties as required.

About You

  • At least 5 years of experience in software engineering.
  • Strong JavaScript, TypeScript, and React, plus real instincts for UX.
  • 2+ years designing and evolving GraphQL schemas for product surfaces used by multiple clients (iOS, Android, web). This sits at the center of the server-driven UI work, so it matters more here than in a typical front-end role.
  • Fluency with HTML, CSS, and the browser environment: DOM, events, platform APIs.
  • A solid foundation in computer science, with strong competencies in data structures, distributed systems, algorithms, and software design.
  • A grasp of production systems at scale, including finding weak points through load testing and tracing.
  • Experience investigating and fixing production performance regressions, including CPU hotspots and latency in high-throughput services.
  • Experience on an on-call rotation for a production service, and owning release cycles end to end.
  • You care about clean architecture and about code you will not mind reading a year from now.
  • Clear writing. You have authored tech specs, runbooks, and cross-team design docs that stood up to scrutiny.
  • Experience with API development in Node or Bun, or in another server framework (Phoenix, Ruby on Rails, FastAPI, Laravel).
  • Experience building and integrating multi-client or white-label platforms, including geo-based routing and per-brand configuration.
  • Experience with Kubernetes and comfort operating services in containers.
  • Comfortable working in the terminal, with Git and GitHub or similar, and in an editor of your choice.
  • Experience with testing frameworks: Jest or Vitest, and ExUnit, RSpec, or pytest.
  • Nice to have: Apollo Federation at scale, GraphQL APIs with Absinthe, Mobile Development for iOS or Android using Swift or Kotlin, hexagonal architecture, domain-driven design, relational databases (PostgreSQL, MySQL), background job processing (Oban, Exq, Sidekiq, Celery), asynchronous event infrastructure (Kafka, RabbitMQ, SQS/SNS, Pub/Sub), open source contributions, startup experience, and a passion for sports or esports.

What We Offer

  • Competitive compensation package
  • Fun, relaxed work environment
  • Education and conference reimbursements.
  • Opportunities for career progression and mentoring others

#LI-REMOTE

Salary Range

$135,000—$180,000 CAD

Penn Interactive is proud to be an equal opportunity workplace. We will consider all qualified applicants for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, disability, veteran status, genetic information, or any other basis protected by applicable law.Base pay is one part of the Total Rewards that Penn Interactive provides to compensate and recognize employees for their work. Most sales positions are eligible for a Commission under the terms of an applicable plan, while most non-sales positions are eligible for a Bonus. Additionally, Penn Interactive provides best-in-class benefits to eligible employees. We believe that benefits should connect you to the support you need when it matters most, and should help you care for those who matter most. That’s why we provide an array of options, expert guidance and always-on tools, that are personalized to meet the needs of your reality – to help support you physically, financially and emotionally through the big milestones and in your everyday life.

From $25, paid onceGet the CV for this job

What happens when you press

One press. We do the rest.

  1. A CV for this posting

    Written against Penn Interactive's own wording, from every piece of relevant proof in your profile.

  2. 25 readers review it

    Recruiter, hiring manager, skeptic and more read every draft, round after round. You get the best round.

    The review screen in CV Rocket: how each CV was read, round by round.

  3. We apply on Penn Interactive's form

    Our application engine gets through the hardest forms there are. Where a question needs you, AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

    An application in CV Rocket: every answer filled in on the employer's form.

  4. Every reply, sorted

    Penn Interactive's answer lands in your private mailbox, and we classify it on arrival: interview, question, rejection.

    The CV Rocket inbox: each employer reply classified as an interview, an action or a rejection.

  5. Reply with AI

    AI helps you write the email, checks it and sends it. We show you whether the recruiter read it.

  6. The interview in your calendar

    Full integration with your calendar. The invitation goes straight in.

    An interview invitation in the CV Rocket inbox, added to the candidate's calendar.
Get the CV for this job

From $25 per CV, paid once. No subscription.

Why it works

3×

more interviews than doing it yourself with ChatGPT.

ChatGPT writes a CV and never learns what happened to it. We see every reply. For each CV we know:

  • How it was written, and how the review scored it
  • When we applied, and how long after the posting went up
  • Which posting, which company, which city
  • Who got the interview, and who heard nothing

That is how we know which CVs get called.

Get the CV for this job

From $25 per CV, paid once. No subscription.

The numbers game

More applications. More interviews.

Every application goes out with its own CV, written for that posting and paid once. Send enough of them and the law of large numbers finds you the job.

Get the CV for this job
By hand5–10
With CV Rocket100
applications a day

Nearby

Live postings like this one

Same employer first, then the same role elsewhere.

Before you press

Straight answers

Get the CV for this job

From $25 per CV, paid once. No subscription.

What if my background isn't good enough?

We make the most of the background you have. The CV uses every piece of relevant proof your profile holds, and one of the 25 readers reads your whole profile and flags what the CV left out.

Do you really apply for me?

Yes, on the employer's own form, the hardest ones included. Where a question needs you, you answer it right there and AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

Is it a subscription?

No. You pay once per CV, from $25. Every application goes out with its own CV, written for that posting.

One job. One CV.
Paid once.

Pick the posting you want. We write for it, apply for you and catch the reply.

Get the CV for this job

From $25 per CV, paid once. No subscription.