Senior Backend Developer (Payments)

About Loop We're a fast-growing fintech startup building the only truly cross-border banking platform. We help businesses seamlessly manage money around the world so they can access more markets, accelerate their growth, and simplify their operations. We're looking for ambitious people to join our mission. We're looking for engineers with a product mindset - people who think about the user's problem first, not just the component they're building. You'll work directly with stakeholders, make trade-off decisions, and own outcomes, not just output. About the Role Hi, I'm https://www.linkedin.com/in/yan-matagne-35862670/, Head of Engineering at Loop, and I'm hiring a Senior Backend Developer to architect and build our payment platform and financial ledger system. In this role, you'll build the systems that move money - the foundation everything else depends on. This role is an onsite position at our downtown Toronto office (Bay and Bloor). 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. We're 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 You'll Be Doing Build and support our Payment Infrastructure with strict data integrityWork in a cross-country environment handling data segregation and legal compliance across jurisdictionsImplement workflow orchestration with Temporal.io for complex payment flows and system consistencyWork directly with stakeholders to understand problems and define solutionsMake informed technical decisions that balance user needs, business goals, and engineering constraintsBuild integrations with banking partners and payment processorsDesign for fault-tolerance, recovery, and comprehensive audit trailsDevelop end-to-end features that help businesses manage money across borders" as the first bullet. Makes it clear they're building product, not just infrastructure What We're Looking For 5+ years backend development, 3+ years in financial systemsDeep understanding of financial ledgers and double-entry bookkeepingExperience with event sourcing, CQRS, and message brokers (especially Kafka)Distributed systems expertise - consistency, availability, fault toleranceProduct mindset - you care about the problem you're solving, not just the system you're buildingYou think about what happens when things go wrong Bonus:  http://temporal.io, event architecture, regulatory knowledge, SWIFT/SEPA/Fedwire familiarity. What we offer Salary range CAD$140,000 to CAD$170,000 base annual, commensurate with experienceEquity ranging 0.01-0.1%3 weeks vacation Enrollment in group's health benefits after probation period This role is onsite in our downtown Toronto officeKitchen full of snacks and drinks to keep you going throughout the dayCatered lunch on Fridays (we take recommendations!) The Challenge Before we talk, show us how you think: A batch of cross-border payments settles overnight. In the morning, reconciliation shows discrepancies: some transactions are off by pennies, others by dollars. The total doesn't match what we expected after FX conversion. In under 500 words, walk us through how you'd 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 mailto:careers@bankonloop.com in Word/ PDF format with the subject line "Backend - [Your Name]". Interview Process Submit your challenge response (async, see above) in Word/ PDF format15 minutes video call to discuss the opportunity and the organization with Mandy, People and Business Operations Specialist30 minutes video call conversation with Yan, Head of Engineering90 minutes in person technical discussion with Ryan, Engineering Manager and one other senior developer60 minutes in person meeting with Cato, CEO and Co-Founder and Sarah, Chief of StaffCome do a work trial with us for 2-3 days (this will be paid)Background check and offer How to Apply To apply for this position, please click “apply” and share your resume, alongside a brief paragraph about yourself and your previous experience. Don't forget to send us your challenge! 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 you’re unsure about your qualifications for this position, we’d still encourage you to apply! Locations: Toronto, Canada