Senior Software Developer, Build Platform

Wealthsimple

. Build containerized development environments across hundreds of services .

Posted 9/29/2026full-timeRemote • CanadaSenior💰 CA$152,000 - CA$189,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building containerized development environments and verification systems for AI-native development, with a strong focus on Ruby, Python, TypeScript, and Kotlin. Proven ability to enhance developer experience through automation, mentorship, and operational excellence metrics.

Highest-signal resume keywords

7+ Years Software Development ExperienceRuby ProgrammingPython ProgrammingTypeScript ProgrammingKotlin Programming

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

ContainerizationAI-Assisted DevelopmentInternal Library DevelopmentMicroservices ArchitectureAutomated TestingDependency ManagementOperational Excellence MetricsEvent-Driven WorkflowsBackend Mocking SolutionsTest Flake Detection

Soft Skills

CollaborationMentorshipPassion for Developer Experience

Tools & Technologies

CLI ToolsAutomated Service ScorecardsLegacy Tool Replacement

Industry Keywords

Platform-Oriented TeamAI-Native DevelopmentProduction WorkCanada Work Eligibility

Tech Stack

Tools & technologies

KotlinMicroservicesPythonRubyTypeScript

About the role

Key responsibilities & impact

Build containerized development environments across hundreds of services
Build verification systems for AI-native development that provide trustworthy answers quickly
Improve test flake detection, test selection, and actionable failure output
Modernize core libraries and CLI tools supporting the microservices architecture
Automate developer machine setup and replace legacy tools with safer, auditable alternatives
Build backend mocking solutions and enable isolated testing of asynchronous, event-driven workflows in ephemeral environments
Define and measure operational excellence through automated service scorecards
Provide insights into dependency management, monitoring, and scalability
Shape the developer journey from onboarding through ongoing code submissions
Support an engineering organization using Ruby, Python, Kotlin, and TypeScript
Collaborate with and mentor other developers

Requirements

What you’ll need

7+ years of experience in software development as part of a team, preferably a platform-oriented team
7+ years of experience with Ruby, Python, TypeScript, or Kotlin
Experience designing, building, and maintaining internal libraries, frameworks, or tooling used by other engineering teams
Hands-on experience with AI-assisted development and coding agents on real production work
Experience building with LLMs and evaluating the correctness of generated output
Deep interest in a fast, reliable, streamlined developer experience
Collaborative spirit and passion for mentorship
Comfort using metrics to identify opportunities and measure impact
Legally eligible to work in Canada
Must permanently reside in Canada

Benefits

Comp & perks

Top-tier health benefits and life insurance
Long-term group savings with employer match, through Wealthsimple for Business
20 vacation days per year
4 wellness days per year
Unlimited sick and mental health days per year*
Work outside Canada for up to 90 days per year*
Employee resource groups, including Rainbow (2SLGBTQ), Women of WS, and Black at WS
Permanent employees receive equity compensation
AI Notetaker interview recording and transcription, with the option to opt out without impact on candidacy