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Software Engineer I, Fullstack ( Post-Purchase International)

affirmRemote SpainPosted 21 Sept 2026

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About this role

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 Engineering team builds systems that power Affirm’s mission. We take pride in our craft, building reliable, performant, and scalable solutions that touch every part of the business. Whether we’re enabling new ways to pay, ensuring our platforms can scale to the most demanding levels in the industry, or developing seamless servicing experiences, our focus is on solving complex problems through exceptional engineering.

Join the pioneering Post-Purchase International team at the forefront of Affirm’s global expansion. You’ll help build the foundational platform and customer experiences needed to bring Affirm’s products to a new generation of international markets. The team owns and evolves the end-to-end post-purchase journey across international markets, ensuring that customers can confidently manage their purchases and access experiences tailored to their local needs.

Success requires deep collaboration: you’ll partner closely with European engineering counterparts and teams across Affirm’s global Post-Purchase organization to develop cohesive, scalable solutions. If you’re passionate about creating world-class customer experiences and excited by the challenge of launching products in new regions, join us. Help shape the next generation of Affirm’s post-purchase platform and define our presence around the world.

What you’ll do With the support of your team, you will work on tasks that contribute to the team's projects and goals. You will work collaboratively and proactively with your team and stakeholders, bringing them along for your work and helping to create visibility and dialog regarding the risks and trade-offs related to your work. You will strike the right balance of speed and quality in your work, ensuring that we hit our business goals while protecting our systems from downtime.

You will contribute to a sense of community on your team by engaging in growth and development activities. On-Call Rotation - There would be an on-call rotation for this role as a requirement. What we look for You have previous work or internship designing, developing and launching APIs at scale using languages like Python or Kotlin. You have previous work or internship experience shipping web apps using declarative UI frameworks like React or Vue.

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You have mastered taking a simple problem or business scenario into a solution that interacts with multiple software components, and executing on it by writing clear, easily understood, well tested and extensible code. You are comfortable navigating a large code base, debugging others' code, and providing feedback to other engineers through code reviews. 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 and Benefits Base Pay Grade - J Equity Grade - 2 Employees new to Affirm typically come in at the start of the pay range . Affirm focuses on providing a simple and transparent pay structure which is based on a variety of factors, including location, experience and job-related skills.

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

ESP base pay range per year: 57,000 - 87,000 EUR Additional benefits include: Type of employment: Contract of Employment 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 The majority of our roles can be located anywhere in Spain. **This job description is not a contractual document, and is not intended to have binding force.** #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. Benefits designed for you Our benefits reflect our commitment to care, transparency, and flexibility. Here are a few highlights: Health coverage at no cost: We cover 100% of premiums for employees and their dependents.

Spending stipends: Monthly stipends support your tech setup, and the ability to choose health and wellness options that are right for you. Time off to recharge: Flexible time off and generous holiday calendars help you rest when you need to. Own a piece of what you build: Our employee stock purchase plan (ESPP) lets you buy Affirm stock at a discount. We’re committed to providing an inclusive interview process, including accommodations for candidates with disabilities.

If you need support, we’re happy to help. For positions based in San Francisco or Los Angeles: Affirm considers qualified applicants with arrest and conviction records, as required by law. 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.

Source listing: greenhouse_affirm

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