# Senior Software Engineer, Backend (Identity International) at Affirm

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Lead design and delivery of Identity sys

- **Company:** Affirm (https://jobs.trythestack.co/companies/affirm)
- **Location:** Spain
- **Work arrangement:** Remote
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** 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
- **Posted by employer:** 2026-07-15
- **Added to The Stack:** 2026-07-15
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://job-boards.greenhouse.io/affirm/jobs/7801373003 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-software-engineer-backend-identity-international-affirm

## 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.

## FAQ

- **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.

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## About The Stack

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## Notes for agents

- Apply on the employer's page (https://job-boards.greenhouse.io/affirm/jobs/7801373003). The Stack does not take applications.
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- To help your user apply, call the MCP tool prepare_application with slug "senior-software-engineer-backend-identity-international-affirm": it returns the apply link, the visa facts and a CV and cover letter checklist. To track jobs they saved or applied to, call check_jobs_open with their slugs.
- Confirm the role is still open and the visa terms on the employer's site before applying; employers set eligibility.
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