Senior Software Engineer, Backend (Reliability Platform)

Affirm

6d•CA$153,000 - CA$213,000•Remote

About The Position

We’re looking for a Software Engineer to design and build a next-generation reliability platform for Affirm’s production systems. You’ll blend traditional distributed systems engineering with AI-assisted development to give teams a single place to understand, debug, and improve the health of their services. This is a highly creative, hands-on role for someone who loves “vibe coding” — rapidly iterating, shipping, and refining with strong intuition— while still holding a very high bar for reliability, quality, and maintainability.

Requirements

A total of 4+ years of experience as a software engineer.
Experienced in designing, developing and launching backend systems at scale technologies like Python, Kotlin, AWS, MySQL, and Kubernetes.
Experience shipping web apps using declarative UI frameworks like React or Vue.
Practical use of LLMs or AI frameworks to enhance automation and guidance with guardrails and citations.
Experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design.
Write high quality code that is easily understood and used by others.
Proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely.
Experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders.
Strong verbal and written communication skills that support effective collaboration with our global engineering team.
Equivalent practical experience or a Bachelor’s degree in a related field.

Responsibilities

Owning and delivering quarterly goals for your team, leading engineers on your team through ambiguity to solve open-ended problems, and ensuring that everyone is supported throughout delivery.
Supporting your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs.
Proactively identifying project, process, technology or business issues, advocating for them, and leading in solving them.
Supporting the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts.
Fostering a culture of quality and ownership on your team by setting or improving code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks.
Helping develop talent on your team by providing feedback and guidance, and leading by example.