Senior Software Engineer, Fullstack (Repayments UX)

Affirm, Inc.; Polska; Hybrid; PLN 474,000 - 711,000; Full time

Benefits offered by this job

Private healthcare (Lux Med Platinum)

MultiSport card

Learning & development programs

Parental leave support

Job summary

Affirm, Inc. is seeking a Senior Software Engineer, Fullstack (Repayments UX), fully remote in Poland.

You will own and deliver quarterly goals, lead engineers through ambiguity, and collaborate with product, design, and analytics to balance technical constraints and business needs. You’ll design backend systems in Python or Kotlin and build web apps with React or Vue, while also advancing mobile work with React Native.

Qualifications

• 4+ years of experience developing and architecting mobile applications.
• Experience shipping web apps with React or Vue.
• Experience designing, developing and launching backend systems in Python or Kotlin.
• Strong communication and ownership in a global team.

Responsibilities

• Own and deliver quarterly goals for the team, guiding engineers through ambiguity.
• Collaborate with product, design and analytics through ideation and constraints.
• Identify and lead resolution of project, process, or tech issues.
• Maintain team artifacts, metrics, and on-call support to keep systems running.
• Set and improve code quality standards and share knowledge across teams.
• Mentor teammates and lead by example to develop talent.

Skills

Mobile development

React Native

React

Vue

Python

Kotlin

Tools

Backend design

Job description

Senior Software Engineer, Fullstack (Repayments UX)

Remote Poland

Ataffirm, 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.

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.

Total rewards

We believe the people building honest financial products ataffirm should share in its success. That's why our total rewards are designed to support your health, growth, financial well‑being, and future.

In service of our mission, we reward employees through a combination of base pay, equity (from parent company), and comprehensive benefits.

Base Pay Grade - N

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).

Base pay ranges and placement within those ranges are determined based on several factors, including role, experience, and job-related skills.

In addition to base pay, all employees in this role are eligible to receive equity from the parent company each year. This means as affirm’s parent company grows, employees have the opportunity to share in that growth financially.

Equity Grade - 4 (awarded in USD)

Affirm holdings, inc. equity grade example

Equity grade: 4New hire equity: $32,000-$48,000Annual Refresh: $10,000Reward equity: $0-$150,000

Affirm also provides flexible spending wallets to all employees for technology and wellbeing related needs, which are reimbursable up to 1390 zł per month.

In addition to your compensation, our comprehensive benefits are designed to support you and the people who matter most. Benefits include:

• Competitive paid time off, paid public holidays, and additional paid Away Days to rest and recharge.
• Comprehensive private healthcare through Lux Med's Platinum package.
• A MultiSport card to support your health and well‑being.
• Learning and development programs to help you grow professionally.
• Family healthcare support through Maven and parental leave support through Parentaly.
• Mental well‑being support through Lyra, including up to 12 confidential counseling or coaching sessions each year for you and your household members.
• Financial well‑being support through Northstar, with unlimited access to Certified.
• Financial Advisors and planning tools at no cost to you.
• Employee Resource Groups (ERGs) that foster connection and inclusion.
• Eligibility for creative tax benefits, subject to applicable law, role, and company policy.

Location - Remote Poland

The majority of our roles can be located anywhere in Poland.

**This job description is not a contractual document, and is not intended to have binding force.**

Remote-first with flexibility built inaffirm 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 youour 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 (esp) 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.