Senior Software Engineer, Sportsbook Platform

Penn Interactive
United States
Remote

Who this role is best for

A natural match if you have experience with AI coding agents and designing APIs for multi-platform use.

Best fit for

  • Candidates with AI coding agent experience and a track record of API design for multiple clients
    — “Hands-on, daily experience building software with AI coding agents”
  • Individuals who have owned features end to end and driven platform scalability
    — “Own features end to end, from the API to the screen”
  • Engineers who have operated production services and debugged cross-client issues
    — “Experience on an on-call rotation for a production service”

Things to consider

  • The role demands deep familiarity with backend systems and real-time features
    — “Build and operate services that stay fast and correct under high throughput”
  • Strong writing skills are essential for documentation and communication
    — “Clear writing. You have authored tech specs, runbooks, and cross-team design docs”

How to stand out

  • Demonstrate experience with API versioning and backward compatibility in your resume
    — “2+ years designing and evolving APIs used by multiple clients”
  • Showcase your ability to debug cross-client issues and own features end to end
    — “Debug problems that cross the client and server boundary”
  • Emphasize your use of AI coding agents in your interview narrative
    — “Use AI coding agents, such as Claude Code, as your main way of building”
Pace · Fast PacedCollaboration · HighAutonomy · HighDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • Design and scale APIs
  • Build and operate high-throughput services
  • Drive changes to improve platform scalability
  • Develop and maintain monitoring systems
  • Write and review code for mobile and backend integration
Typical background
5+ years of software engineering experienceExperience with backend and API systemsExperience with AI coding agents

Skills & requirements

Required

AI Coding AgentsAPI DesignReal-time SystemsHigh Throughput SystemsMonitoring And AlertingTest-driven DevelopmentPair ProgrammingTechnical Leadership

Preferred

SwiftKotlinDistributed Systems

Stack & domain

API DesignBackend DevelopmentReal-time SystemsIos DevelopmentAndroid DevelopmentKotlinSwiftAI Coding AgentsClaude CodeCursorCopilot AgentsDatadogAPI Schema ManagementVersioned ContractsMobile App IntegrationNetwork OptimizationWeak Network HandlingMonitoringAlertingTracingCode ReviewPair ProgrammingTechnical WritingLeadershipCommunicationProblem-solvingTeamworkMentorshipProject ManagementGoal-orientedAdaptabilityInnovationCustomer FocusSoftware EngineeringOnline GamingSports BettingCasino GamingBackend ServicesApisMobile DevelopmentAI Coding

About the role

Original posting from Penn Interactive via Greenhouse

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 

We build backend services and real-time APIs that power what bettors and players see and do in theScore Bet, Hollywood Casino, and theScore Casino. We support iOS, Android, and web. Our work is moving closer to the apps themselves, and our engineers increasingly pair with the mobile teams.

We focus on outcomes, not ticket counts. A project starts with a goal we can measure.  You own it until the goal is met.

About the Work 

Design, scale, and tune APIs and the real-time delivery behind them.

Treat the API schema as a versioned contract with released mobile apps. Classify breaking changes, plan migrations with the iOS and Android leads, and keep client models in sync.

Build and operate services that stay fast and correct under high throughput, bursty load.

Find bottlenecks and risks in production and drive the changes that make the platform scale.

Set up and refine monitoring, alerting, and tracing in Datadog for the systems you own.

Develop native Android and iOS features in Swift or Kotlin when a feature needs it, alongside the mobile teams.

Write thorough tests for every feature and bug fix.

Own features end to end, from the API to the screen. Pair with iOS, Android, and web engineers, and learn enough of their code to make targeted changes when the feature needs it.

Debug problems that cross the client and server boundary.

Shape APIs from the client's point of view: what the app needs, how it caches, and how it behaves on a weak network.

Use AI coding agents, such as Claude Code, as your main way of building. You plan the work, direct the agent, and review its output to the same standard as any teammate's code.

Draft proposals, tech specs, and runbooks, and present them to leadership and partner teams.

Mentor teammates through code review, pairing, and writing things down.

Other duties as required. 

About You 

Hands-on, daily experience building software with AI coding agents (Claude Code, Cursor, Copilot agents, or similar). You can describe how you prompt, constrain, test, and review agent output, and where agents fail.

At least 5 years of experience in software engineering, with most of it on backend or API systems.

2+ years designing and evolving APIs used by multiple clients (iOS, Android, web), including versioning and backward compatibility.

Willing to learn native iOS and Android development in Swift or Kotlin. Prior mobile shipping experience is a plus, not a requirement. You use AI coding agents to close the gap, and you review their mobile output with the mobile leads.

Experience building real-time features, such as subscriptions, streaming, or push-based updates.

A solid foundation in computer science, with strong competencies in data structures, distributed systems, algorithms, and software design.

Experience finding and fixing production performance regressions, including CPU, I/O, memory, and latency problems, through load testing and tracing.

Experience on an on-call rotation for a production service, and owning release cycles end to end.

Experience with a server framework such as Phoenix, Ruby on Rails, FastAPI, Laravel, or Node.

Clear writing. You have authored tech specs, runbooks, and cross-team design docs that stood up to scrutiny.

You care about clean architecture and about code you won't mind reading a year from now.

Comfortable working in the terminal, with Git and GitHub or similar, and in an editor of your choice. 

Nice to have 

Native mobile experience in Swift or Kotlin. You have shipped, or contributed to, an iOS or Android app, and you are comfortable pairing with mobile engineers.

GraphQL, including federated graphs

Elixir and Absinthe

Strong relational database skills, such as PostgreSQL or MySQL

Kubernetes and operating services in containers

Background job processing (Oban, Exq, Sidekiq, Celery) and event infrastructure (Kafka, RabbitMQ, SQS/SNS, Pub/Sub) 

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 USDPenn 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.

Source: Penn Interactive careers (Greenhouse)

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