Senior Software Engineer, Sportsbook Platform

Penn Interactive

. Design, scale, and tune APIs and real-time delivery systems .

Posted 11/10/2026full-timeRemote • United StatesSenior💰 $145,000 - $193,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in designing and scaling APIs and real-time delivery systems, with a strong focus on performance optimization and monitoring. Proficient in using AI coding agents for development and possesses solid experience in mobile development with Swift or Kotlin.

Highest-signal resume keywords

API Design And VersioningReal-Time Feature DevelopmentAI Coding Agents ExperiencePerformance OptimizationTechnical Writing

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

API DevelopmentSwiftKotlinData StructuresDistributed SystemsAlgorithmsLoad TestingGitGraphQLRelational Databases

Soft Skills

MentoringCollaborationTechnical Communication

Tools & Technologies

DatadogPhoenixRuby On RailsFastAPILaravelNodeKubernetesContainersBackground Job ProcessingEvent Infrastructure

Industry Keywords

Mobile DevelopmentProduction PerformanceOn-Call RotationVersioningBackward Compatibility

Tech Stack

Tools & technologies

AndroidDistributed SystemsElixirGraphQLiOSKotlinKubernetesLaravelNode.jsRubyRuby on RailsSwift

About the role

Key responsibilities & impact

Design, scale, and tune APIs and real-time delivery systems
Treat API schemas as versioned contracts with released mobile apps; classify breaking changes and plan migrations with iOS and Android leads
Build and operate services that remain fast and correct under high throughput and bursty load
Find production bottlenecks and risks and drive platform-scaling improvements
Set up and refine Datadog monitoring, alerting, and tracing
Develop native Android and iOS features in Swift or Kotlin when needed
Write thorough tests for every feature and bug fix
Own features end to end from API to screen, pairing with iOS, Android, and web engineers
Debug issues across client and server boundaries
Shape APIs from the client perspective, including caching and weak-network behavior
Use AI coding agents such as Claude Code as the primary development method; plan work, direct agents, and review output
Draft proposals, technical specifications, and runbooks and present them to leadership and partner teams
Mentor teammates through code review, pairing, and documentation
Perform other duties as required

Requirements

What you’ll need

Hands-on, daily experience building software with AI coding agents such as Claude Code, Cursor, Copilot agents, or similar
At least 5 years of experience in software engineering, mostly on backend or API systems
2+ years designing and evolving APIs used by multiple clients, including versioning and backward compatibility
Willingness to learn native iOS and Android development in Swift or Kotlin
Experience building real-time features such as subscriptions, streaming, or push-based updates
Strong competencies in data structures, distributed systems, algorithms, and software design
Experience finding and fixing production performance regressions 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 technical writing, including tech specs, runbooks, and cross-team design documents
Comfortable working in the terminal, with Git and GitHub or similar, and in an editor of choice
Prior mobile shipping experience is a plus, not a requirement
Native mobile experience in Swift or Kotlin, GraphQL, Elixir and Absinthe, relational databases, Kubernetes, containers, background job processing, and event infrastructure are nice to have

Benefits

Comp & perks

Competitive compensation package
Fun, relaxed work environment
Education and conference reimbursements
Opportunities for career progression and mentoring others
Best-in-class benefits, with options and tools supporting employees physically, financially, and emotionally
Bonus eligibility for most non-sales positions