Senior Backend Developer (Payments)

About the Role

Hi Im Yan Head of Engineering at Loop and Im hiring a Senior Backend Developer to architect and build our payment platform and financial ledger this role youll build the systems that move money - the foundation everything else depends on.

This is an onsite position at our downtown Toronto office (Adelaide and Spadina).

Why We Exist

Small businesses have been underserved by traditional banks. Most businesses operate globally yet moving money across borders is still painfully hard. Banking fees are opaque while the process and time to send or receive money internationally is decades old. The tools offered to businesses are only suitable for companies with finance and treasury teams of 20.

Loop exists to change that.

Were building the banking infrastructure for businesses that operate globally by default. Multi-currency accounts. Seamless international payments. Modern systems to manage company finances. The things that should have existed years ago.

What Youll Be Doing

• Build and support our Payment Infrastructure with strict data integrity
• Work in a cross-country environment handling data segregation and legal compliance across jurisdictions
• Implement workflow orchestration with for complex payment flows and system consistency
• Work directly with stakeholders to understand problems and define solutions
• Make informed technical decisions that balance user needs business goals and engineering constraints
• Build integrations with banking partners and payment processors
• Design for fault-tolerance recovery and comprehensive audit trails
• Develop end-to-end features that help businesses manage money across borders as the first bullet. Makes it clear theyre building product not just infrastructure

What Were Looking For

• 5 years backend development 3 years in financial systems
• Deep understanding of financial ledgers and double-entry bookkeeping
• Experience with event sourcing CQRS and message brokers (especially Kafka)
• Distributed systems expertise - consistency availability fault tolerance
• Product mindset - you care about the problem youre solving not just the system youre building
• You think about what happens when things go wrong

Bonus: event architecture regulatory knowledge SWIFT/SEPA/Fedwire familiarity.

What we offer

• Salary range CAD$140000 to CAD$170000 base annual commensurate with experience
• Equity ranging 0.01-0.1%
• 3 weeks vacation
• Enrollment in groups health benefits after probation period
• This role is onsite in our downtown Toronto office
• Kitchen full of snacks and drinks to keep you going throughout the day
• Catered lunch on Fridays (we take recommendations!)

The Challenge

Before we talk show us how you think:

A batch of cross-border payments settles the morning reconciliation shows discrepancies: some transactions are off by pennies others by dollars. The total doesnt match what we expected after FX conversion.

In under 500 words walk us through how youd investigate this. What are the likely causes What data would you look at first How would you design systems to prevent or catch this earlier

Send your response to with the subject line Backend - Your Name.

Interview Process

1. Submit your challenge response (async see above)
2. 15 minutes video call to discuss the opportunity and the organization with Mandy People and Business Operations Specialist
3. 30 minutes video call conversation with Yan Head of Engineering
4. 90 minutes in person technical discussion with Ryan Engineering Manager and one other senior developer
5. 60 minutes in person meeting with Cato CEO and Co-Founder and Sarah Chief of Staff
6. Come do a work trial with us for 2-3 days (this will be paid)
7. Background check and offer

How to Apply

Your application will be reviewed by our recruiters and hiring managers; we do not use AI tools for screening or selection.

Loop is committed to creating a diverse culture. We encourage you to apply regardless of who you are or where you came from - what matters is the journey ahead. Put simply if youre unsure about your qualifications for this position wed still encourage you to apply!

Required Experience:

Senior IC