Wealthsimple
fintech
SeniorSoftwareDeveloper,Ledger
Neural analysis suggests this role is
optimal for Senior candidates.
“Senior Software Developer, Ledger at Wealthsimple. Skills: ledger infrastructure, Java, Kotlin, microservices architecture, double-entry bookkeeping principles, accounting logic, high-throughput transaction processing, consistency guarantees, audit trails, compliance reporting, backend experience, high-correctness systems, SQL, relational databases, AI tools. Own core ledger infrastructure: design, build, and evolve the systems that record financial transactions accurately and durably. Model fin”
Industry & Context.
Comfort with ambiguity. You can take a vague "our reconciliation breaks every month-end" and walk out with a root cause, a proposal, and a plan
What They're Looking For.
Must Have
Senior software engineer with backend experience, track record of building reliable, high-correctness systems in Java, Kotlin, or similar JVM languages, Solid SQL skills and comfort working across relational databases at scale, A collaborator across disciplines who builds trust with Finance, Accounting, and Compliance teams, knows how to ask the right questions, and turns what they hear into software that solves the real problem, A bias toward clarity and correctness. In ledger systems, clever is rarely better than clear. You write code that's easy to audit, easy to reason about, and easy to verify, Comfort with ambiguity. You can take a vague "our reconciliation breaks every month-end" and walk out with a root cause, a proposal, and a plan, End-to-end ownership. You work autonomously across the full development lifecycle, take ownership of improvements that reduce toil, and influence technical decisions within your domain, An AI-first mindset. You leverage AI tools to accelerate development and raise the bar for code quality, with hands-on experience building or contributing to agentic workflows and intelligent automation
Nice to Have
Financial domain fluency — you understand double-entry accounting, can read a chart of accounts, and know why precision and immutability matter in ledger design, Experience in fintech, banking, or regulated financial services, where correctness isn't optional and audit trails aren't an afterthought, Experience with ERP integrations (e. g. , Oracle EBS), Familiarity with event-driven architectures and stream processing, particularly Kafka, Familiarity with regulatory reporting frameworks in Canadian financial services, Prior work on event-sourced or append-only ledger architectures, some frontend range in React
What You'll Do.
Own core ledger infrastructure: design
and evolve the systems that record financial transactions accurately and durably
Model financial correctness by translating double-entry bookkeeping principles and accounting logic into clean
Handle high-throughput transaction processing and design systems that maintain consistency guarantees under load without sacrificing performance
Drive audit trails and compliance reporting so every transaction is traceable
every state change is logged
and every report is reproducible
Contribute to the roadmap by bringing your domain expertise to planning conversations
Define what "correct" looks like for ledger systems
and build the observability
and reconciliation tooling to prove it continuously
How You'll Work.
Team & Collaboration
Collaborate broadly across Wealthsimple — partnering with product teams to ensure their transactions are properly recorded; supporting Finance, Accounting, Audit, Brokerage Operations, and Customer Service with the tooling and data they need to do their jobs; builds trust with Finance, Accounting, and Compliance teams; collaborate with incredibly talented, curious, and driven teammates
Process & Methodology
take ownership of improvements that reduce toil, influence technical decisions within your domain
Full Job Description
BUILD SOMETHING PEOPLE LOVE Wealthsimple's mission is to help everyone achieve financial freedom – by making financial services simple, transparent, and low-cost. We're Canada's largest fintech, trusted by over 3 million clients with more than $100 billion in assets. We move fast, we own our work, and we care deeply about the people using our products. If that sounds like you, keep reading. We're proud of what we've built — and we're just getting started. Read our Culture Manual https://www.wealthsimple.com/en-ca/culture and learn more about how we work https://www.wealthsimple.com/en-ca/careers. WHY THIS ROLE EXISTS As Wealthsimple's product suite grows, so does the complexity of our financial infrastructure. More products mean more transaction types, more regulatory obligations, and more surface area where a ledger inconsistency can cascade into a real problem. We're investing in senior engineers who can hold that complexity — people who understand double-entry accounting as well as they understand distributed systems, and who can collaborate with Finance as naturally as they can with a product team. WHAT YOU'LL DO - Own core ledger infrastructure: design, build, and evolve the systems that record financial transactions accurately and durably, using Java/Kotlin in a microservices architecture. - Model financial correctness by translating double-entry bookkeeping principles and accounting logic into clean, testable, auditable code that Finance and Compliance can trust. - Handle high-throughput transaction processing and design systems that maintain strong consistency guarantees under load without sacrificing performance. - Drive audit trails and compliance reporting so every transaction is traceable, every state change is logged, and every report is reproducible. - Collaborate broadly across Wealthsimple — partnering with product teams to ensure their transactions are properly recorded, and supporting Finance, Accounting, Audit, Brokerage Operations, and Custom
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