Senior Software Engineer, Fullstack (International)

Remote; San Francisco (CA); Remote; USD 160,000 - 224,000; Full time

Benefits offered by this job

Equity rewards

Health stipend and tech stipend

100% subsidised medical coverage (you+

Job summary

Affirm is reinventing credit with transparent and honest Direct‑to‑Consumer products. The International Accelerator Engineering team seeks a Senior Software Engineer to own backend systems and front-end integration for global markets from a UK remote location.

You will design scalable services, ship web apps with React or Vue, and leverage AI to boost daily productivity. You’ll collaborate across product, design, and analytics to deliver quarterly goals, own technical plans, and contribute to a

Qualifications

• 4+ years of software engineering experience.
• Backend design and deployment at scale with Python, Kotlin, AWS, MySQL, Kubernetes.
• Experience shipping web apps with React or Vue.
• Proficient in AI-assisted development.
• Ability to define technical plans for major features with simple, extensible design.
• Strong communication across global teams.

Responsibilities

• Own and deliver quarterly goals for your team, guiding engineers through ambiguity.
• Collaborate with product management, design & analytics during ideation and decision making.
• Identify and lead solutions to project, process, or technology issues.
• Maintain and monitor team artifacts, metrics, and on-call activities.
• Set and improve code review and design standards across the team.
• Provide feedback and guidance to develop talent on the team.

Skills

4+ years

Python

Kotlin

AWS

MySQL

Kubernetes

React

Vue

AI usage

Technical planning

Ownership & mentorship

Job description

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest.

The International Accelerator Engineering team is growing, and we're looking for a Senior Software Engineer to join us! 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 shaping how affirm builds Direct-to-Consumer products for Canada, the UK, and future international markets. We build and own various products used by our consumers, like the affirm app and other Direct to Consumer products across international markets. We are here to make sure we reach and provide useful tools to our users so they can experience honest financial products at their fullest.

Our work is agile and fast-paced, shipping new code to production for millions to use across geographies and rigorously measuring the impact it has on them. This role rewards curiosity, ownership, ability to zoom in and out, switch contexts often, also in an open contribution model, 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, while constantly looking for ways to get AI to increase productivity on a daily basis. 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 a total of 4+ years of experience as a software engineer.
• You are experienced in designing, developing and launching backend systems at scale technologies like Python, Kotlin, AWS, MySQL, and Kubernetes.
• You have experience shipping web apps using declarative UI frameworks like React or Vue.
• You efficiently use AI to assist you to deliver high quality products on a daily basis
• 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

Base Pay Grade - N

Equity Grade - 5

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 equity rewards, monthly stipends for health, wellness and tech spending, and benefits (including 100% subsidised medical coverage, dental and vision for you and your dependents.)

Base pay range per year: £120,000 - £168,000

Location: UK Remote

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