Senior Software Engineer, Promotions
Penn Interactive is seeking a Senior Software Engineer to join its Promotions team. This role focuses on delivering high-quality promotional capabilities that allow marketing leaders to create compelling offers and provide standout experiences for guests. The team is responsible for integrating with third-party providers, supporting client developers with tools to launch promotions and games, and building infrastructure to assist marketing and operations stakeholders in configuring user experiences.
The successful candidate will work within a collaborative agile environment to design, architect, and deliver scalable solutions. The role involves managing technical problems of high complexity, ensuring system reliability, and mentoring other engineers to maintain high standards of software craftsmanship.
- Design, scale, and performance-tune GraphQL APIs, low-latency gRPC services, and SQL queries powering the promotions engine.
- 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.
- 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.
- Minimum of 5 years of experience in Software engineering (required).
- A 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 that stand up to scrutiny (required).
- Experience with modern web frameworks and API development (Phoenix, Ruby on Rails, Fast API, Laravel, Node) (required).
- 2+ Years of experience designing and evolving GraphQL schemas for product surfaces used by multiple clients (iOS, Android, Web) (required).
- Experience building and integrating multi-client / white-label platforms, including geo-based routing and per-client configuration (required).
- A 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 (Oban, Exq, Sidekiq, Celery, Beanstalk) (required).
- Experience with asynchronous event handling infrastructure (Apache Kafka, RabbitMQ, AWS SQS/SNS, Google Cloud Pub/Sub) (required).
- Building applications in Elixir (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.