Senior Backend Engineer

Lutra

Toronto, Ontario, Canada

Toronto, Ontario, Canada

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Über

We're supporting a fast-growing Canadian fintech that has reimagined how people manage their largest recurring expenses and is focused on helping them gain more value from every dollar spent. Already processing over a billion dollars in annual payment volume and serving a rapidly expanding user base, the team is building critical financial infrastructure that demands 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 looking for a Senior Backend Engineer to join their core engineering team. In this role, you'll own architecture and development for backend systems that power their flagship financial platform. This includes building and scaling payment infrastructure, ledger systems, and APIs that must meet strict reliability and compliance standards.
You'll work closely with engineering leadership and cross-functional partners 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: Architect 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 leadership, 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

Tech Stack

Front-End: React, React Native, NextJS, Tailwind, TypeScript

Back-End: , TypeScript, Firebase

Infrastructure & Tooling: Git, GCP

Your know-how

4+ years of backend engineering experience, with 2+ years in fintech or payments

Strong expertise with (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$125,000 – CA$175,000 per year.

Toronto, Ontario, Canada

Sprachkenntnisse

English

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