Senior Software Developer, Book of Record

Wealthsimple

Senior Software Developer at Wealthsimple developing backend systems for financial products. Involves using Kotlin, Kafka, and solving complex engineering challenges.

Posted 7/13/2026full-timeRemote • 🇨🇦 CanadaSenior💰 CA$152,000 - CA$189,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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

Demonstrates strong backend engineering skills with a focus on system design, reliability, and operational excellence. Capable of building low-latency, highly available services while fostering a culture of quality and collaboration within engineering teams.

Highest-signal resume keywords

Kotlin ProgrammingKafka Event-Driven ArchitectureGraphQL API DevelopmentProduction OwnershipSoftware Quality Assurance

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

Backend EngineeringSystem DesignLow-Latency ServicesHigh Availability SystemsWell-Tested CodeMaintainable CodeObservable Code

Soft Skills

Clear CommunicationMentoringCuriosity

Tools & Technologies

AI-Assisted DevelopmentProduction Monitoring Tools

Industry Keywords

Operational ExcellenceReal-Time CorrectnessFinancial Systems

Tech Stack

Tools & technologies

GraphQLKafkaKotlin

About the role

Key responsibilities & impact

Design, build, and operate the backend services that power balances, margin, buying power, collateral, and lending - the systems the rest of Wealthsimple trusts to be correct.
Own meaningful scope end-to-end, from technical design through to running your work reliably in production.
Solve genuinely hard problems around real-time correctness, low latency, and high availability, including keeping our systems dependable through market open and other peak moments.
Help evolve our architecture as Leverage grows - new lending products, larger scale, and an event-driven platform built on Kafka and a JVM services stack.
Raise the bar on quality and operational excellence through thoughtful design, code review, and a healthy sense of production ownership.
Mentor and grow the engineers around you - through pairing, code review, and in-the-moment feedback - and learn just as much from them in return.
Use AI-assisted tooling to ship faster and more safely. We treat building with AI as part of how we work, and we're always figuring out how to do it well.

Requirements

What you’ll need

Several years (5+) of professional software engineering experience, with a track record of building and operating critical production systems that people or businesses depend on.
Strong backend engineering skills and sound judgment about system design, reliability, and trade-offs.
We work primarily in Kotlin, with Kafka and GraphQL in the mix - deep experience in a comparable stack matters more than an exact match, and we'll help you ramp on ours.
Experience building services that are low-latency and highly available
You take production ownership seriously and stay calm and methodical when things go wrong.
Strong software quality habits: you write well-tested, maintainable and observable code. You make the codebase and the people around you better through your reviews.
Clear, steady communication. You work well with Product, Design, and other engineering teams, share context early, and ask questions before you're stuck rather than disappearing down a hole.
Curiosity about the "why" behind the systems - not just the code, but the financial reality it represents and the clients on the other side of it.
Enthusiasm for AI-assisted development, and interest in helping shape what excellent, rigorous AI-assisted engineering looks like on our team.

Benefits

Comp & perks

Top-tier health benefits and life insurance
Long-term group savings with employer match, through Wealthsimple for Business
20 vacation days, 4 wellness days, and unlimited sick and mental health days per year
90 days away: work outside Canada for up to 90 days per year
Employee resource groups, including Rainbow (2SLGBTQ), Women of WS, and Black at WS