Senior Software Engineer, Backend (Test Enablers)

Stack

Responsibilities

• ▹Design, build and maintain scalable systems for synthetic identities, test data seeding, mocking, load testing and deterministic validation workflows
• ▹Help evolve the testing strategy from broad E2E-heavy validation toward a more scalable model with stronger component, integration, contract and performance testing
• ▹Build platform capabilities that make production-like load testing safer, more repeatable and easier to operate
• ▹Improve the 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
• ▹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 and runbooks
• ▹Reduce manual operational load for load testing
• ▹Write high-quality, maintainable code
• ▹Contribute to technical specs, RFCs, ADRs and project plans
• ▹Review code and technical designs, provide constructive feedback
• ▹Mentor engineers

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

Soft skills

About the company

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without hidden fees or compounding interest.