Senior Software Engineer, Backend – AI Platform

🔥 2 minutes ago

🇨🇦 Canada – Remote

💵 $153k - $213k / year

⏰ Full Time

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 1%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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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

• Plan, execute, and own technical decisions and projects within the AI Platform team from design through launch and on-call • Design and build gateway, runtime, and evaluation services for scaling AI workloads across millions of users and transactions • Build identity, quota, routing, caching, and failover controls for attributable and governable AI spend • Partner with security, infrastructure, and product engineering teams to establish guardrails for agentic workloads and tool access identity • Create and monitor system metrics and own operational health, including monitoring, alerting, runbooks, and on-call • Set and improve code review and design standards through writing and tech talks • Use AI tools and agentic workflows for coding, design review, and operations • Educate, mentor, and grow engineers while driving design, coding, and testing best practices

🎯 Requirements

• 4+ years of experience designing, developing, and launching backend systems at scale • Experience using languages such as Python or Kotlin • Track record developing highly available distributed systems • Experience with AWS, MySQL, and Kubernetes • Practical production experience with LLMs, agents, or AI frameworks, including inference APIs, LLM gateways, MCP, tool calling, evals, or agent runtimes • Understanding of AI usage and infrastructure for AI workloads • Experience defining technical plans for significant features or system components • Ability to produce high-quality, understandable code • Proficiency making significant changes in a large codebase safely • Strong verbal and written communication skills • Equivalent practical experience or a Bachelor’s degree in a related field • Must reside in Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, Prince Edward Island, or Saskatchewan

🏖️ Benefits

• Equity rewards may be included in the total compensation package • Monthly stipends for health, wellness, and tech spending • 100% subsidized medical coverage for employees and dependents • Dental and vision coverage for employees and dependents • Remote-first work with flexibility within the country of employment • Flexible time off • Generous holiday calendars • Employee stock purchase plan (ESPP) to buy Affirm stock at a discount • Inclusive interview process and accommodations for candidates with disabilities • In-person onboarding experience for all new hires