[C] Senior Software Engineer - Developer Platform

MLSE (Maple Leaf Sports & Entertainment Partnership); Toronto; On-site; CAD 83,000 - 131,000; Full time

Job summary

Maple Leaf Sports & Entertainment Partnership (MLSE) is seeking a senior software engineer with hands-on experience across software development, cloud infrastructure, DevOps, and developer tooling. You will build production software while improving platforms and tooling to enable other engineers.

You’ll work on API design, distributed systems, and cloud-native architectures using AWS, Docker, Kubernetes, and IaC tooling.

Qualifications

• 5+ years in professional software engineering designing, building, operating production systems.
• Proficiency in TypeScript/JavaScript or Python with backend experience.
• Strong API design, distributed systems, authentication, databases and networking.
• Experience building reusable components, not just single apps.
• Solid Git usage, code reviews, testing, release management and debugging.
• Hands-on cloud engineering with AWS and cloud-native apps.
• Experience with containers, Kubernetes, and Helm for deployment.
• Infrastructure as Code using Terraform, CloudFormation, or CDK.
• Ability to create shared platform capabilities used across teams.
• Awareness of IAM, secrets management, observability and production reliability.
• Interest in integrating AI tools into the software development lifecycle.

Responsibilities

• Build production software and improve platforms, tools, and developer experience.
• Design and operate production systems with emphasis on reliability and security.
• Develop reusable components and shared platform capabilities for multiple teams.
• Lead CI/CD workstreams and automate repetitive tasks through tooling.

Skills

5+ years experience

TypeScript/JavaScript

Python

API design

Distributed systems

Auth & security

Databases

Networking

Git

Cloud engineering

Docker

Kubernetes

Helm

Terraform

CloudFormation

CDK

IAM & secrets management

Observability

Security & production readiness

AI-assisted development

Education

Bachelor’s degree in Computer Science or related field

Tools

AWS

Docker

Kubernetes

Terraform

CloudFormation

CDK

GitHub Actions

CI/CD tooling

Job description

Powered by Passion. United by Purpose. Build for Impact. At Maple Leaf Sports & Entertainment Partnership (MLSE), we exist to deliver the ultimate fan experience by lifting trophies, spirits, and communities - united as one. We're more than a workplace. We are a team of passionate people, boldly building the future of sport and entertainment, together. We believe in the power of play, the strength of collaboration, and the energy that comes from showing up with purpose. From the ice to the pitch, the hardwood to the digital arena, we’re proud to be the driving force behind the Toronto Maple Leafs (NHL), the Toronto Raptors (NBA), Toronto FC (MLS), Toronto Argonauts (CFL) and development teams with the Toronto Marlies (AHL), Raptors 905 (NBA G League), Toronto FC II (MLS NEXT Pro League) and Raptors Uprising Gaming Club, the Toronto Raptors Esports franchise in the NBA 2K League. We bring these teams – and world-class entertainment – to life at our iconic venues, including Scotiabank Arena, BMO Field, Coca-Cola Coliseum, Ford Performance Centre, BMO Training Ground, and OVO Athletic Centre. Off the field, we serve up elevated dining at e11even, Real Sports, and our signature club spaces like Hot Stove Club, ScotiaClub, and Platinum Club. Through MLSE Foundation and MLSE LaunchPad, we use the power of sport to help youth facing barriers reach their full potential. Since 2009, we’ve invested more than $45 million into Ontario communities – and we’re just getting started. This is what it means to be One MLSE: a culture where everyone plays a role, everyone belongs, and everyone contributes to something bigger than themselves. So, if you're ready to play with purpose, grow with passion, and win as one, we’d love to have you on our team.

• We know that great candidates come from a variety of backgrounds and experiences. Even if you do not meet every qualification listed, we encourage you to apply. Your unique perspective, transferable skills, and lived experience may be exactly what we’re looking for.

Job Description

We are looking for a senior, hands-on software engineer with broad experience across software development, cloud infrastructure, DevOps, and developer tooling. You should be comfortable building production software while also improving the platforms, tools, and practices that enable other developers to work effectively.

Core Software Engineering

• 5+ years of professional software engineering experience, including experience designing, building, and operating production systems.
• Strong software development skills in one or more modern programming languages such as TypeScript/JavaScript, Python, or similar, with the ability to contribute to backend applications and services when required.
• Strong understanding of API design, distributed systems, authentication/authorization, databases, networking, and modern application architecture.
• Experience designing maintainable, reusable software components rather than solving problems only within a single application.
• Strong Git and software development fundamentals, including code review, testing, dependency management, release management, and debugging.
• Cloud & Platform Engineering
• Strong hands-on experience with AWS and designing, deploying, and operating cloud-native applications.
• Experience with containers and Kubernetes, including Docker, Kubernetes/EKS, Helm, ingress, configuration, secrets, scaling, and troubleshooting.
• Experience with Infrastructure as Code and automated infrastructure provisioning using tools such as Terraform, CloudFormation, CDK, or equivalent.
• Experience designing and maintaining shared platform capabilities that can be reused across multiple applications and development teams.
• Strong understanding of cloud networking, identity and access management, secrets management, observability, reliability, and production operations.
• Ability to evaluate infrastructure and application architectures for security, scalability, reliability, performance, and cost.

CI/CD & Developer Experience

• Strong experience designing and maintaining CI/CD pipelines, preferably using GitHub Actions or comparable tooling.
• Experience creating reusable build, test, deployment and release workflows across multiple repositories or applications.
• Experience building developer tooling, application templates, reusable libraries, SDKs, CLIs, or internal platforms that reduce repetitive engineering work.
• Ability to identify recurring development and operational tasks and turn them into automation, self-service capabilities, and paved-road patterns.
• Strong understanding of developer experience and the ability to balance standardization and guardrails with developer flexibility.
• Security & Production Readiness
• Working knowledge of secure software development practices, including IAM, secrets, dependency management, application security, network security, and least-privilege access.
• Experience working with Infrastructure, Cybersecurity, or other technical governance functions to move applications through architecture, security, and production-readiness reviews.
• Ability to translate security and infrastructure requirements into practical tooling and automated guardrails rather than relying solely on manual review.
• AI-Enabled Software Development
• Practical experience using modern AI-assisted development tools such as Claude Code, GitHub Copilot, Codex, or similar tools as part of day-to-day software development.
• Strong interest in developing new approaches for integrating generative AI into the software development lifecycle, including development, testing, code review, documentation, security, and operational workflows.
• Ability to evaluate where AI/agentic workflows provide value and where traditional deterministic software, automation, or reusable libraries are more appropriate.
• Interest in building tooling and standards that allow both traditional engineers and AI-enabled/non-traditional developers to build software quickly and reliably.
• Understanding of the importance of model usage, token consumption, observability, and cost management as AI becomes a larger component of software development and production systems.

Technical Leadership & Collaboration

• Ability to take broad technical problems from discovery through prototype, implementation, productionization, and ongoing operation.
• Strong technical judgment and the ability to independently make implementation decisions within established architectural standards.
• Ability to review application and infrastructure designs, identify risks, and recommend practical solutions before formal Architecture, Infrastructure, or Cybersecurity review.
• Comfortable working across application development, infrastructure, architecture, security, and operations rather than within a narrowly defined technical domain.
• Strong communication skills and the ability to work directly with software engineers, architects, infrastructure and security teams, product teams, and other technical stakeholders.
• A mindset focused on enabling other engineers rather than becoming a gatekeeper: success means making the right way to build and deploy software the easiest way.

Strong Assets

• Experience building or operating an internal developer platform or Platform Engineering capability.
• Experience with AWS services including EKS, RDS, S3, DynamoDB, Lambda, IAM, CloudWatch, Route 53, and WAF.
• Experience with OAuth 2.0, OIDC, enterprise identity providers, and application authorization patterns.
• Experience with AI platforms or model providers such as Amazon Bedrock, Anthropic, or OpenAI.
• Experience implementing cloud FinOps, cost attribution, infrastructure optimization, or AI/model usage monitoring.
• Experience modernizing existing applications, development practices, or CI/CD environments.
• Experience supporting products that integrate with external APIs, SaaS platforms, data systems, or enterprise services.
• Experience working in an environment where rapid prototyping must coexist with production security, reliability, and operational standards.

Job Posting Compensation Range/Rate

Hourly Rate

At MLSE, we are committed to building an equitable, diverse and inclusive organization. We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status. MLSE will provide reasonable accommodation for qualified individuals with disabilities in the job application process. If you have difficulty using our online application system and you need an accommodation due to a disability, please email [e-mail]. This email is only for accommodation requests. Resumes sent to this email address will not be considered.