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Senior Software Engineer, Fullstack (Repayments UX)

Join Affirm as a Senior Full-Stack Software Engineer to enhance the repayment experience for millions of users.

Location
Remote Spain
Compensation
€86k–€122k/yr
Level
senior
Type
full time · Remote

Posted by employer 4 days ago

First seen on Joblaze 3 days ago

Last verified on the company career page 11 hours ago

Skills & Technologies

What you'll build

  • Own and deliver quarterly goals
  • Lead engineers through ambiguity
  • Collaborate with product management and design
  • Create and monitor metrics
  • Foster a culture of quality and ownership

Must have

  • 4+ years of experience developing mobile applications
  • Experience shipping web apps using React or Vue
  • Proficient in Python or Kotlin

Nice to have

  • Experience with React Native

Practical constraints

  • On-Call Rotation

Requirements

Experience
4+ years
Visa
Sponsorship available

Benefits

Learning & Development Programs Flexible Work Equity/Stock Options Health Insurance Parental Leave

Joblaze summary

In this role, the Senior Full-Stack Software Engineer will lead a team in delivering quarterly goals while navigating complex challenges in the repayment user experience. Proficiency in mobile and web application development using frameworks like React and backend systems in Python or Kotlin is essential. This position is ideal for experienced engineers who thrive in collaborative environments and are committed to quality and mentorship. The team operates within a remote-first structure, emphasizing agility and a strong culture of ownership.

Joblaze insights

  • Listed 3 days ago — first seen on Joblaze October 28, 2026. Last confirmed on Affirm's careers page October 31, 2026.
  • This exact title is also open at 1 other location at Affirm: Remote Poland.
  • Starts above 6% of 163 comparable senior fullstack roles we track (median $166,000 across 82 companies).

Quick facts

Is the Senior Software Engineer, Fullstack (Repayments UX) role remote?
Yes — Affirm lists this as a fully remote position.
What's the salary range?
Affirm lists €86,000–€122,000 for this role.
How much experience is required?
At least 4 years of relevant experience for this Senior Software Engineer, Fullstack (Repayments UX) role.
What's the tech stack?
Joblaze extracted these technologies from the posting: Kotlin, Python, React, React Native, Vue.
Does Affirm sponsor work visas for this role?
Yes — the posting indicates visa sponsorship is available for the right candidate.
What seniority level is this role?
Affirm targets senior candidates for this position.
Is this full-time or contract?
Full-time for this Senior Software Engineer, Fullstack (Repayments UX) role at Affirm.

From the original posting

At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most.

The Repayment UX Engineering team is growing, and we're looking for a Senior Full-Stack Software Engineer. We're a full-stack team located entirely in Europe within the same time zone, but culturally rooted in Silicon Valley. We directly improve the financial lives of over 20 million people. We build and own user journeys that enable them to pay back loans worth collectively over $40B each year. Our team exists to make these moments the most reliable and transparent in world-class consumer finance.


Our work is agile and fast-paced and we rigorously measure the impact it has on the behavior of our users. This role rewards curiosity, ownership, and a builder's mindset. You'll know exactly what your objectives are, you'll have what you need to hit them, and you'll choose your own path to get there. You'll learn quickly from experienced teammates and grow your craft on problems that matter at scale.If you want to build something new and operate it at scale – come join us!

What You'll Do

  • You will be responsible for owning and delivering quarterly goals for your team, leading engineers on your team through ambiguity to solve open-ended problems, and ensuring that everyone is supported throughout delivery.
  • You will support your peers and stakeholders in the product development lifecycle by collaborating with product management, design & analytics by participating in ideation, articulating technical constraints, and partnering on decisions that properly consider risks and trade-offs.
  • You will proactively identify project, process, technology or business issues, advocate for them, and lead in solving them.
  • You will support the operations and availability of your team’s artifacts by creating and monitoring metrics, escalating when needed, and supporting “keep the lights on” & on-call efforts.
  • You will foster a culture of quality and ownership on your team by setting or improving code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks.
  • You will help develop talent on your team by providing feedback and guidance, and leading by example.
  • On-Call Rotation - There would be an on-call rotation for this role as a requirement.

What We Look For

  • You have 4+ years of experience of developing and architecting mobile applications, preferably using declarative UI frameworks like React Native.
  • You have experience shipping web apps using declarative UI frameworks like React or Vue.
  • You have experience designing, developing and launching backend systems and are proficient in one of Python or Kotlin.
  • Experience developing and architecting mobile applications, preferably using declarative UI frameworks like React Native is a bonus.
  • You have experience defining a technical plan for the delivery of a significant feature or system component with an elegant, simple and extensible design. You write high quality code that is easily understood and used by others.
  • You are proficient at making significant changes in a large code base, and have developed a suite of tools and practices that enable you and your team to do so safely.
  • Your experience demonstrates that you take ownership of your growth, proactively seeking feedback from your team, your manager, and your stakeholders.
  • You have strong verbal and written communication skills that support effective collaboration with our global engineering team.

Compensation & Benefits
Pay Grade - N
Equity Grade - 4

Base pay is part of a total compensation package that may include monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents). In addition, the employees may be eligible for equity rewards offered by Affirm Holdings, Inc. (parent company).

ESP base pay range per year: €86,000 - €122,000

Additional benefits include:
• Flexible Spending Wallets for tech, food and lifestyle
• Away Days - wellness days to take off work and recharge
• Learning & Development programs
• Parental benefits
• Employee Resource & Community Groups

Location - Remote Spain

We are able to offer visa sponsorship for this role, but do require that someone is based in Spain for the role.

#LI-Remote

Remote-first with flexibility built in
Affirm is proud to be a remote-first company. Most roles can be done from almost anywhere within the country of employment. Some positions may occasionally require in-person work at an Affirm office, and a few are office-based due to the nature of the work. All new hires will be invited to attend an in-person onboarding experience.

By clicking "Submit Application," you acknowledge that you have read Affirm's Global Candidate Privacy Notice and consent to the use of your personal information as described.

Standard company text repeated across Affirm's postings is omitted here.

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