Senior Software Engineer, Backend (Identity International) at Affirm

✨ The Stack take on this Affirm job

• 🏢 Affirm has 38 jobs here, 25 with visa sponsorship see all
• 🛂 Visa: Highly Qualified Professional permit. Education: Higher education degree guide
• 💡 No salary shown. Ask Affirm if it is above the minimum.

Updated 2026-11-05, from our data and official sources.

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About the role

Responsibilities:
- Lead design and delivery of Identity systems (KYC, user lifecycle, decisioning) for international markets.
- Translate ambiguous product problems into clear technical projects and quarterly goals; own delivery end-to-end.
- Collaborate with Product, Design, Analytics and partner teams to define requirements, trade-offs, and integration points.
- Improve operational health: define metrics, create runbooks, support monitoring, and participate in on-call rotations.
- Mentor engineers, raise code and review standards, and contribute to hiring and onboarding.
- Identify cross-cutting risks and advocate for technical investments that improve scalability, availability and compliance.

Requirements:
- 4+ years of backend development experience using Python or Kotlin in production systems.
- Experience building distributed systems on AWS with relational datastores (e.g., MySQL) and Kubernetes.
- Strong system design skills, ability to reason about scale, availability and regulatory constraints.
- Clear communicator able to work across teams and present technical trade-offs to stakeholders.
- Experience with identity, fraud, KYC or regulatory systems is a strong plus.
- Demonstrated ownership, mentoring ability, and focus on long-term maintainability and operational excellence.

Responsibilities

Lead the design and delivery of backend identity systems for international markets, focusing on KYC and user lifecycle management. Drive technical direction, mentor engineers, and collaborate with product teams to solve ambiguous business problems.

Requirements

Requires 4+ years of experience in backend development using Python or Kotlin and building distributed systems with AWS, MySQL, and Kubernetes. Must demonstrate strong ownership, communication skills, and the ability to design extensible system components.

Key skills

• Python — in 1200 other listings on The Stack
• Kotlin — in 251 other listings on The Stack
• AWS — in 802 other listings on The Stack
• MySQL — in 93 other listings on The Stack
• Kubernetes — in 585 other listings on The Stack
• Distributed Systems — in 342 other listings on The Stack
• Backend Development — in 171 other listings on The Stack
• System Design — in 199 other listings on The Stack
• API Design
• KYC
• Identity Management
• Technical Leadership
• Code Review
• Operational Health
• Cross-functional Collaboration

On The Stack (as of 2026-11-05)

• Affirm has 37 other listings on The Stack, 24 of them marked as offering visa sponsorship.
• 76 visa-sponsored jobs in Spain on The Stack, posted in the last 60 days.
• 195 visa-sponsored software engineer jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about Affirm

Is this Senior Software Engineer, Backend (Identity International) role still open?

It was posted on 2026-07-15. Listings more than 30 days old may no longer be active, so check Affirm's site before applying.

Does Affirm offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Affirm's site.

Where is this role located?

The listing gives the location as Spain. It is marked remote.

What skills does this role ask for?

The listing names: Python, Kotlin, AWS, MySQL, Kubernetes, Distributed Systems, Backend Development, System Design, API Design, KYC, Identity Management, Technical Leadership, Code Review, Operational Health, Cross-functional Collaboration.