Senior Software Engineer, Affirm
Backend, Test Enablers
€86-122k
Offers ESPP
More information about location
Buy-now-pay-later card for online and in-store
Be an early applicant
Buy-now-pay-later card for online and in-store
1001+ employees
Be an early applicant
€86-122k
Offers ESPP
More information about location
1001+ employees
Company mission
To deliver honest and transparent financial products that improve users' lives.
Role
Who you are
- 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
What the job involves
- We are looking for a highly motivated Senior Software Engineer to join our Test Enablers team within Test Platform Engineering (Developer Productivity)
- The Test Enablers team builds and operates the platforms that allow Affirm engineering teams to test with confidence. Our systems provide synthetic identities, test data seeding, mocking, deterministic testing workflows and load testing
- Developer Productivity’s mission is to dramatically accelerate software development at Affirm while keeping our systems reliable for customers. Our long-term north star is to scale to 1,000 PRs per day by December 2027. To reach that goal, Affirm needs validation systems that are fast, trustworthy, automated, and scalable
- This role is central to that effort
- You will design and build platform capabilities that help engineers validate product changes earlier, run safer load tests, reduce reliance on expensive E2E-only validation, and improve the reliability of CI signals. You will also help prepare Affirm’s testing infrastructure for AI-assisted development workflows, where agents and humans need deterministic, observable, and actionable validation feedback
- Affirm is growing fast, and we want you to help us scale our products and engineering systems 10x and beyond through world-class developer productivity infrastructure
- 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
Our take
Affirm offers point-of-sale loans to consumers, working with merchants like Shopify, KAYAK, and Walmart. Buy now, pay later transactions have grown in popularity in recent years, and this business is tapping into the market with a totally different approach to credit - by delivering the Affirm card, the first US debit card with the option to pay-over-time.
Serving over 21 million consumers and over 300,000 merchants, the company offers flexible payback options ranging from 3 to 36 months. The interest rates run between 0% and 30%, so, while they are not necessarily the cheapest option, Affirm prides itself on having no fees for late payments, no hidden charges, and total transparency about what people will pay before they take out a loan.
Affirm collects payments from the customers and pays the merchants directly, shouldering the risk itself. The company has boosted its market share, expanding its availability beyond the US to include most of Canada, and continues to launch new features and create new partnerships towards bettering its offering.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
-11% employee growth in 12 months
Company
Funding (last 2 of 5 rounds)
Sep 2020
$500m
SERIES G
Apr 2019
$300m
SERIES F
Total funding: $1.1bn
Company benefits
- Compensation: We have a simple, flexible, and transparent remote-first compensation structure so you can make the best decisions for yourself and your family
- Spending Wallets: Access tech, food, lifestyle, and family planning wallets for your expenses
- Supportive Communities: Get involved with our employee resource groups and community groups
- Remote-first Workforce: If your role is remote, you can set up shop anywhere in your home country
- Generous Time Off: Take the time you need when life happens
- Health Benefits: Get a plan that fits your needs
- Mental Healthcare: Take care of your mind with great mental health programs
- Parental Leave: Birth and non-birth parents get 18 weeks’ paid leave. Plus, a 4-week return-to-work transition program, at full base pay
- Away Days: We offer 20 company-wide paid days off—which help our teams collectively pause to recharge
- Learning & Development: Engage in exciting learning programs to level up your growth
Company HQ
Chinatown, San Francisco, CA
Leadership
Max Levchin
(Co-Founder & CEO)Has founded/co-founded numerous companies, holding various executive positions at each, including Paypal, Slide, Glow, HVF Labs, and SciFi VC. Also worked at large brands including Google, Yelp, Yahoo, and Evernote.
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