Senior Software Engineer, Backend – Streaming Infrastructure

February 27, 2026

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Job Description:

You will be responsible for 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.
You will support 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.
You will proactively identify project, process, technology, or business issues, advocate for them, and lead in solving them.
You will support 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.
You will foster 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.
You will help develop talent on your team by providing feedback and guidance, and leading by example.

Requirements:

4+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin.
A track record of developing highly available distributed systems using technologies like AWS, MySQL, and Kubernetes.
Experience with Confluent Platform (Schema Registry, Tableflow) is a strong plus
Expertise with at least one stream processing framework like Spark, Samza, Flink, Beam, etc.
Experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple, and extensible design.
You 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.
Strong verbal and written communication skills that support effective collaboration with our global engineering team.
This position requires either equivalent practical experience or a Bachelor’s degree in a related field.

Benefits:

Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependents
Flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses
Time off - competitive vacation and holiday schedules allowing you to take time off to rest and recharge
ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount

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