Senior Software Engineer, Backend – Test Enablers

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Affirm

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 2012

💳 Fintech

👥 B2C

🛍️ eCommerce

💰 Post-IPO Equity on 2021-01

Fintech • B2C • eCommerce

Affirm is a financial technology company that offers a 'Buy Now, Pay Later' service, allowing consumers to make purchases and pay for them over time with flexible payment plans. Affirm eliminates hidden fees and compound interest, providing clear terms and conditions for its users. The company also offers the Affirm Card, a debit card that allows users to request to pay over time for larger purchases or pay in full for smaller ones. Affirm partners with various retailers across multiple categories, including electronics, apparel, and travel, providing customers with the convenience of paying over time at checkout both online and in physical stores. Affirm's services are integrated with Apple Pay, enabling customers to make payments seamlessly from their iPhone or iPad.

📋 Description

• Design, build, and maintain scalable systems for synthetic identities, test data seeding, mocking, load testing, and deterministic validation workflows. • Help evolve Affirm’s testing strategy from broad E2E-heavy validation toward a more scalable model with stronger component, integration, contract, performance, and targeted E2E testing. • Build platform capabilities that make production-like load testing safer, more repeatable, and easier to operate. • Improve our test platform so it is reliable, observable, and easier for other teams to adopt. • Partner with product engineering and infrastructure teams to improve test signal quality, reduce false failures, and support faster validation loops. • Lead medium-to-large technical projects from ambiguous problem definition through design, implementation, rollout, and operational ownership. • Improve reliability and operational maturity through dashboards, SLOs, alerts, runbooks, and clear ownership models. • Reduce manual operational load for load testing, including test data creation, environment setup, reporting, and failure diagnosis. • Write high-quality, maintainable code that can be easily understood and extended by others. • Contribute to technical specs, RFCs, ADRs, project plans, and other async artifacts that align teams around technical decisions. • Review code and technical designs, provide constructive feedback, and help raise engineering standards. • Mentor engineers and help build a culture of practical testing excellence.

🎯 Requirements

• 5+ years of software engineering experience. • Strong backend engineering experience with Python, Kotlin, Java, or similar languages. • Experience designing, building, and operating distributed systems, platform infrastructure, internal developer tools, or testing infrastructure. • Strong ownership and ability to independently drive ambiguous technical work to completion. • Experience improving system reliability, observability, operational maturity, and maintainability. • Ability to collaborate across engineering teams and influence technical direction through clear communication. • Excellent written and verbal communication skills, including async artifacts such as technical specs, RFCs, ADRs, and project plans. • Strong engineering fundamentals across system design, testing, debugging, reliability, and production operations. • Operational ownership of critical internal testing platforms, including reliability, observability, alerting, runbooks, and incident readiness. • Experience with test automation frameworks, test data systems, mocks, contract testing, integration testing, load testing and CI/CD platforms. • Ability to balance pragmatic delivery with long-term technical quality. • Passion for improving developer productivity and product quality through scalable, automated, reliable systems.

🏖️ Benefits

• 100% subsidized medical coverage, dental and vision for you and your dependents • Flexible Spending Wallets for tech, food and lifestyle • Away Days - wellness days to take off work and recharge • Learning & Development programs • Parental benefits • Employee Resource & Community Groups • ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount • Competitive vacation and holiday schedules allowing you to take time off to rest and recharge