# Senior Software Engineer, Fullstack (Repayments UX) 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 delivery of quarterly goals: guide

- **Company:** Affirm (https://jobs.trythestack.co/companies/affirm)
- **Location:** Spain
- **Work arrangement:** Remote
- **Employment type:** Full-time
- **Experience level:** 2–5 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Full-stack development, React Native, React, Vue, Python, Kotlin, Mobile application architecture, Web application development, Backend systems design, Declarative UI frameworks, Agile methodologies, System design, Code review, Technical leadership, Mentorship
- **Posted by employer:** 2026-10-27
- **Added to The Stack:** 2026-10-28
- **Listed until:** 2026-12-26
- **Status:** Active
- **Apply:** https://job-boards.greenhouse.io/affirm/jobs/8040380003 (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-software-engineer-fullstack-repayments-ux-affirm

## About the role

Responsibilities:
- Lead delivery of quarterly goals: guide engineers through ambiguity, define milestones and ensure timely delivery.
- Collaborate with product, design and analytics during ideation to surface technical constraints and trade-offs.
- Identify and drive improvements to projects, processes and technology; proactively surface risks and solutions.
- Maintain operational ownership: create and monitor metrics, support on-call rotations and incident response.
- Raise engineering quality: set code-review and design standards, write documentation and share learnings through talks.
- Mentor and develop teammates, provide feedback and support hiring and growth activities.

Requirements:
- 4+ years building and architecting mobile and web applications; experience with declarative UI frameworks (React Native and React/Vue).
- Proficiency in backend development using Python or Kotlin and experience launching backend systems.
- Strong communication and collaboration skills; able to partner across product, design and analytics.
- Proven ability to define a technical plan and deliver significant features at scale.
- Comfortable with on-call responsibilities and maintaining production reliability.
- Product-oriented mindset and experience working in agile teams with measurable impact.

## Responsibilities

You will lead engineers to deliver quarterly goals and solve complex technical problems while collaborating with product, design, and analytics teams. Additionally, you will ensure system availability through on-call rotations and foster a culture of high-quality engineering standards.

## Requirements

Candidates must have 4+ years of experience in mobile and web application development using declarative UI frameworks like React Native, React, or Vue. Proficiency in Python or Kotlin and experience in designing scalable backend systems are also required.

## FAQ

- **Is this Senior Software Engineer, Fullstack (Repayments UX) role still open?** It was posted on 2026-10-27 and is listed as active on The Stack. Confirm on Affirm's application page 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: Full-stack development, React Native, React, Vue, Python, Kotlin, Mobile application architecture, Web application development, Backend systems design, Declarative UI frameworks, Agile methodologies, System design, Code review, Technical leadership, Mentorship.

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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/8040380003). The Stack does not take applications.
- Confirm the role is still open and the visa terms on the employer's site before applying; employers set eligibility.
- Cite this job as: "Senior Software Engineer, Fullstack (Repayments UX) at Affirm, listed on The Stack Jobs (https://jobs.trythestack.co/jobs/senior-software-engineer-fullstack-repayments-ux-affirm)".
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