Backend Engineer

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Backend Engineer

Toronto, Ontario

Engineering

In office

Full-time

Your opportunity

We’re supporting a fast-growing Canadian fintech that is reimagining how people manage their largest recurring expenses. Already processing over a billion dollars in annual payment volume and serving a rapidly expanding user base, this team is building critical financial infrastructure that requires robust, secure, and scalable systems. If you’re interested in designing and building financial platforms that handle millions of dollars in daily transactions while helping users unlock credit-building, rewards, and financial flexibility, this could be the right opportunity for you.

Our client is adding at least one more Backend Software Engineer to their core payments team. In this role, you’ll contribute to the architecture and development of backend systems that power their flagship financial platform. This may include building and scaling payment infrastructure, ledger systems, and APIs that must meet strict reliability and compliance standards, and/or generally tackling the ambiguous problems inherent in new product development.

You’ll work alongside engineering leadership, cross-functional partners and teammates to design and deliver backend services that users can depend on for their most important payments.

Key responsibilities

• Backend service development: Design, build, and maintain backend services and APIs using NestJS and TypeScript on GCP, ensuring reliability, scalability, and security
• Financial systems & ledger design: Build and optimize ledger systems, data models, and payment processing pipelines to handle high transaction volumes and maintain accurate audit trails
• System scalability & performance: Participate in technical design discussions to ensure systems scale effectively as transaction volumes and feature complexity grow, while preserving compliance, performance, and reliability
• Integration & compliance: Connect backend services with financial APIs, payment processors, and banking systems; ensure solutions meet PCI and SOC 2 requirements and align with regulatory standards
• Infrastructure & reliability: Manage infrastructure as code using Terraform and GCP; design event-driven microservices using Pub/Sub; monitor production systems to ensure resilience and uptime
• Cross-functional collaboration: Work closely with engineering, product, and compliance teams to translate requirements into technical solutions; contribute to a culture of mentorship, openness, and shared learning
• Adaptability & innovation: Stay current with emerging technologies, frameworks, and industry best practices; experiment with new approaches to improve efficiency and strengthen the platform over time

Your know-how

• 3+ years of backend engineering experience
• Strong expertise with Node.js (NestJS) and TypeScript for production APIs
• Hands-on experience with ledger systems, double-entry bookkeeping, or financial data modeling
• Background scaling systems handling high transaction volumes (millions/month)
• Proficiency with PostgreSQL, database optimization, and GCP
• Experience with payment processing, financial APIs, and regulatory compliance (PCI, SOC 2, etc.)
• Strong communication skills and the ability to explain technical and financial concepts clearly
• Track record of ownership and delivery in high-stakes environments

It’s a bonus if

• You have experience with Terraform and infrastructure-as-code practices
• You’ve worked with PCI DSS or other security frameworks
• You’ve built real-time payment systems or instant settlement features
• You’ve contributed to open banking or financial data aggregation tools
• You’ve worked at a high-growth fintech company before

Compensation

The base pay range for this role is CA$105,000 – CA$155,000 per year.

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Req ID: R52