Software Engineer II, Backend – Infrastructure Platform

Affirm

Software Engineer designing and building reliability platform for Affirm’s production systems. Blending traditional engineering with AI-assisted development.

Posted 6/23/2026full-timeRemote • 🇺🇸 United StatesJunior💰 $146,000 - $225,000 per yearWebsite

Tech Stack

Tools & technologies

Python

About the role

Key responsibilities & impact

Build a centralized reliability command center that gives teams a unified view of system health, risk, and reliability across services and environments.
Create AI agents that can assist with incident triage, root-cause exploration, log/trace summarization, and recommended next actions.
Create delightful developer-facing features and APIs that help engineers explore data, debug issues, and make better decisions.
Use AI-assisted development tools (e.g., Cursor, Claude, Copilot-like tools) as leverage to prototype, refactor, and ship high-quality code quickly.
Own projects end-to-end: requirements, architecture, implementation, testing, rollout, and iteration based on feedback.
Collaborate closely with partner teams (product, infra, data, SRE) to understand pain points and translate them into simple, powerful solutions.

Requirements

What you’ll need

This position requires either equivalent practical experience or a Bachelor’s degree in a related field
1.5+ years of experience as a software engineer
Strong proficiency in Python, with experience architecting data-intensive applications and robust APIs
Problem-solving and product sense: you care about the 'what' and the 'why,' not just the 'how.' You are capable of taking ambiguous requirements and rapidly iterating towards a working solution
Hands-on experience with AI-assisted development, such as Cursor, Claude, or similar tools, and enthusiasm for using them to build and ship features faster.
Practical use of LLMs or AI frameworks to enhance automation and guidance with guardrails and citations

Benefits

Comp & perks

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

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Pythondata-intensive applicationsAPIsAI-assisted developmentLLMsautomationroot-cause explorationlog/trace summarizationincident triageprototyping

Soft Skills

problem-solvingproduct sensecollaborationiterationcommunication

Certifications

Bachelor’s degree