Senior Software Engineer, Sportsbook Platform

Penn Interactive

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

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

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and evolving APIs, with a strong foundation in software engineering principles and experience in real-time feature development. Proficient in utilizing AI coding agents for software development and capable of mentoring teammates while ensuring clean architecture and maintainable code.

Highest-signal resume keywords

API Design and VersioningAI Coding Agents ExperienceReal-Time Feature DevelopmentBackend Systems EngineeringTechnical Documentation Authoring

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

API DevelopmentSwift ProgrammingKotlin ProgrammingLoad TestingDistributed SystemsData StructuresAlgorithmsServer FrameworksPerformance Regression AnalysisClean Architecture

Soft Skills

MentoringClear WritingCollaboration

Tools & Technologies

DatadogGitGitHubPhoenixRuby on RailsFastAPILaravelNodeGraphQLKubernetes

Industry Keywords

Mobile DevelopmentReal-Time SystemsProduction ServicesCross-Team CollaborationEvent Infrastructure

Tech Stack

Tools & technologies

AndroidDistributed SystemsElixirGraphQLiOSKotlinKubernetesLaravelNode.jsRubyRuby on RailsSwift

About the role

Key responsibilities & impact

Design, scale, and tune APIs and the real-time delivery behind them
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 changes
Set up and refine Datadog monitoring, alerting, and tracing
Develop native Android and iOS features in Swift or Kotlin when needed, alongside mobile teams
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 the client-server boundary
Shape APIs from the client’s point of view, including app needs, caching, and weak-network behavior
Use AI coding agents such as Claude Code as the primary development method; plan work, direct agents, and review outputs
Draft proposals, tech specs, 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 (Claude Code, Cursor, Copilot agents, or similar)
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
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
Solid foundation in computer science, including 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 writing and experience authoring tech specs, runbooks, and cross-team design documents
Care about clean architecture and maintainable code
Comfortable working in the terminal, with Git and GitHub or similar, and in an editor of your choice
Prior mobile shipping experience is a plus, not a requirement
Native mobile experience, GraphQL, Elixir and Absinthe, relational databases, Kubernetes, container operations, 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 for eligible employees, including personalized options, expert guidance, and always-on support tools for physical, financial, and emotional wellbeing
Bonus eligibility for most non-sales positions