Software Engineer, Sportsbook Platform
Penn Interactive is seeking a Software Engineer to join the Sportsbook Platform team, which manages the backend infrastructure for theScore Bet Sportsbook. This team is responsible for the marketplace, including event, market, and page-composition systems that determine how betting information is surfaced and updated for users.
The role focuses on the technical architecture surrounding markets, including how they are modelled and how quickly data propagates to patrons. The platform operates on a stack primarily consisting of Elixir and Phoenix, supported by PostgreSQL, Kafka, and a service mesh of gRPC and GraphQL endpoints running on Kubernetes. The successful candidate will work in an environment that prioritises production hygiene, including load testing, tracing, and structured monitoring.
- Develop, scale, and optimise the GraphQL APIs, gRPC endpoints, and SQL queries that power the marketplace.
- 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 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.
- Take on the Sportsbook Platform Support rotation, which owns release management and deployment management during its window.
- 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 the codebase, through specs, pairing, and code review.
- Perform other duties as required.
- Minimum of 3 years of experience in Software engineering (required).
- Solid foundation in computer science, with strong competencies in data structures, distributed systems, algorithms, and software design (required).
- Strong grasp of production systems at scale, and experience identifying areas of improvement in a production environment through load testing and tracing (required).
- Experience investigating and remediating production performance regressions, including CPU hotspots and latency regressions in high-throughput services (required).
- Experience with on-call rotations for a production service, including owning release cycles end-to-end (required).
- Passionate about clean code architecture and software craftsmanship (required).
- Excellent written and verbal communication skills, with a track record of authoring tech specs, runbooks, and cross-team design docs (required).
- Experience with modern web frameworks and API development such as Phoenix, Ruby on Rails, Fast API, Laravel, or Node (required).
- Experience designing and evolving GraphQL schemas for product surfaces used by multiple clients (required).
- Experience building and integrating multi-client / white-label platforms, including geo-based routing and per-client configuration (required).
- Strong grasp of relational databases, including PostgreSQL and MySQL (required).
- Experience with Kubernetes and comfort operating services in a containerized environment (required).
- Comfortable working in the terminal, with Git and GitHub or similar, and in an editor of your choice (required).
- Experience with testing frameworks such as ExUnit, RSpec, Jest, pytest, or equivalent (required).
- Experience with background job processing such as Oban, Exq, Sidekiq, Celery, or Beanstalk (required).
- Experience with asynchronous event handling infrastructure such as Apache Kafka, RabbitMQ, AWS SQS/SNS, or Google Cloud Pub/Sub (required).
- Building GraphQL APIs with Absinthe (nice-to-have).
- Hexagonal architecture (nice-to-have).
- Domain Driven Development (nice-to-have).
- Contribution to open source software (nice-to-have).
- Experience working at startups (nice-to-have).
- Passion for sports and/or esports (nice-to-have).
- Competitive compensation package.
- Fun, relaxed work environment.
- Education and conference reimbursements.
- Opportunities for career progression and mentoring others.
Penn Interactive is the online gaming arm of PENN Entertainment, one of the largest regional casino operators in the United States. Headquartered in Philadelphia, it runs PENN's digital sports betting and online casino products, including theScore Bet and the Hollywood Casino online brands. The business previously operated the ESPN Bet sportsbook under a partnership with ESPN, which ended in late 2025. Penn Interactive combines proprietary technology - including theScore media platform - with PENN's nationwide casino network across North America.