Senior Backend Architect: High-Scale Systems (Remote)

Affirm; Toronto; Remote; CAD 153,000 - 213,000; Full time

Benefits offered by this job

Health coverage

Tech stipend

Flexible time off

ESPP

Job summary

Affim is building the financial brain behind our card products. We’re seeking a senior backend engineer to lead design and development of high‑throughput, highly available services, from APIs to data models in a distributed architecture.

You’ll collaborate with product, data science, and engineering teams, mentor junior engineers, and drive robust, scalable systems that power real‑time approvals, origination, and refunds across our card loan platform.

Qualifications

• 5+ years of experience in software development and a deep understanding of system design and architecture.
• Motivated leader, inspiring team growth and fostering a culture of continuous learning.
• Excellent communicator, adept at sharing complex ideas with diverse audiences.
• Strong analytical and problem-solving skills with a creative and solution-oriented mindset.
• Proficiency in modern programming languages such as Python and Kotlin.
• Experience with cloud platforms (AWS, Azure, Google Cloud) and containerization (Docker, Kubernetes).
• Knowledge of database systems (SQL, NoSQL), web frameworks, and RESTful API development.
• This position requires either equivalent practical experience or a Bachelor’s degree in a related field.

Responsibilities

• Drive technical strategy by leading planning, prioritization, and execution of projects supporting product, technical, and business goals.
• Lead the end-to-end design and development of large-scale, high-availability services, including robust APIs and data models for microservice/event-driven architectures.
• Collaborate across Product, Analytics, Design, Legal, and Accounting to define requirements and execute card loan attribution and lifecycle strategy.
• Ensure system health and performance by diagnosing issues, optimizing code, and driving long-term robustness and scalability.
• Mentor and grow the team by guiding junior engineers, leading design reviews, and promoting best practices through code reviews.

Skills

System design

Leadership

Communication

Analytical thinking

Problem solving

Python

Kotlin

REST APIs

Education

Bachelor’s degree in related field

Equivalent practical experience

Tools

Docker

Kubernetes

AWS

Azure

Google Cloud

PostgreSQL

MongoDB

Job description

Affim is building the financial brain behind our card products. We’re seeking a senior backend engineer to lead design and development of high‑throughput, highly available services, from APIs to data models in a distributed architecture.

You’ll collaborate with product, data science, and engineering teams, mentor junior engineers, and drive robust, scalable systems that power real‑time approvals, origination, and refunds across our card loan platform.