Senior iCasino Backend Engineer | Elixir & GraphQL

Penninteractive; United States; On-site; USD 145,000 - 193,000; Full time

Benefits offered by this job

Competitive compensation package

Education reimbursements

Mentoring opportunities

Career progression

Job summary

Penn Interactive is seeking a seasoned software engineer to help build and scale the iCasino platform, including theScore and casino lobby systems.

You will own GraphQL schemas, Elixir services, and production reliability, collaborating with cross‑functional teams and mentoring peers to deliver high‑quality software at scale.

Qualifications

• Minimum 5 years of software engineering experience.
• 2+ years building applications in Elixir.
• 2+ years designing and evolving GraphQL schemas.
• Strong CS fundamentals, including data structures and distributed systems.
• Experience with Kubernetes and containerized services.
• Experience with relational databases (PostgreSQL, MySQL).
• Experience with on‑call rotations and production release cycles.
• Excellent communication and collaboration across teams.

Responsibilities

• Design, scale, and performance‑tune GraphQL APIs, low‑latency services, and SQL queries powering the platform.
• Own high‑level technical problems and draft proposals for leadership and partners.
• Deliver features and game provider integrations end‑to‑end in an agile environment.
• Identify bottlenecks and drive improvements for production scalability.
• Set up and refine monitoring and alerting (DataDog) for owned systems.
• Mentor engineers across teams and contribute to code reviews.

Job description

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 throughHollywood 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
As part of the iCasino team, you will be working with a group of talented and friendly individuals. Our goal is to deliver a best-in-class online casino experience across Hollywood Casino, theScore Casino, and theScore Bet Sportsbook & Casino. The iCasino team deals with integrating with third party game providers and aggregators, supporting our client developers with everything they need to be able to browse and launch games, owning the real-money wagering flows behind every spin and hand, and building tools to support our casino operations and marketing stakeholders with configuring the perfect lobby for each brand and market. Importantly, we take great pride in delivering highly reliable and scalable solutions.

About the Work

• Design, scale, and performance-tune GraphQL APIs, low-latency gRPC services, and SQL queries powering the casino lobby, game launch, and real-money wagering flows
• Own technical problems of the highest scope and complexity, drafting proposals and presenting them to leadership and partner teams for feedback
• Design, architect, and deliver new features and game provider integrations end-to-end in a collaborative agile/scrum environment
• Identify bottlenecks and areas of risk in production, and drive the changes that make the platform more scalable
• Set up and refine monitoring and alerting in DataDog for the systems you own
• Mentor engineers on the team and across teams that ship into our codebase, through specs, pairing, and code review
• Other duties as required.

About You

• You possess a minimum of 5 years of experience in Software engineering
• 2+ Years of experience building applications in Elixir is required
• 2+ Years of experience designing and evolving GraphQL schemas
• A solid foundation in computer science, with strong competencies in data structures, distributed systems, algorithms, and software design
• Strong grasp of production systems at scale, and experience identifying areas of improvement in a production environment through load testing and tracing
• Experience investigating and remediating production performance regressions, including CPU hotspots and latency regressions in high-throughput services
• Experience with on-call rotations for a production service, including owning release cycles end-to-end
• Passionate about clean code architecture and software craftsmanship
• Excellent written and verbal communication skills, with a track record of authoring tech specs, runbooks, and cross-team design docs that stand up to scrutiny
• A strong grasp of relational databases, including PostgreSQL and MySQL
• Experience with Kubernetes and comfort operating services in a containerized environment
• Comfortable working in the terminal, with Git and GitHub or similar, and in an editor of your choice
• Experience with testing frameworks such as ExUnit, RSpec, Jest, pytest, or equivalent
• Experience with background job processing (Oban, Exq, Sidekiq, Celery, Beanstalk)
• Experience with asynchronous event handling infrastructure (Apache Kafka, RabbitMQ, AWS SQS/SNS, Google Cloud Pub/Sub)
• NICE TO HAVE: experience in iCasino, sports betting or another regulated real-money domain, familiarity with game provider and wallet integrations, hexagonal architecture, Domain Driven Development, contribution to open source software, experience working at startups, passion for casino gaming, sports and/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

$145,000—$193,000 USD

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.