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[Remote] Senior Software Engineer, Full Stack (Zero to One Labs)

Remote · Argentina Full-time

Note: The job is a remote job and is open to candidates in USA. 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. As a Senior Software Engineer in the Zero to One Labs, you will work in a small, empowered team to build AI-powered prototypes and influence product direction through rapid experimentation.

Responsibilities

  • 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

Skills

  • 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 have experience leveraging AI tools, agentic coding workflows, and automation to accelerate development, prototyping, and problem solving
  • You have strong experience leveraging AI tools, agentic coding workflows, and automation to accelerate development, prototyping, and problem solving
  • 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
  • This position requires either equivalent practical experience or a Bachelor's degree in a related field

Benefits

  • Equity rewards
  • Monthly stipends for health, wellness and tech spending
  • Benefits (including 100% subsidized medical coverage, dental and vision for you and your dependents.)
  • Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependents
  • Flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses
  • Time off - competitive vacation and holiday schedules allowing you to take time off to rest and recharge
  • ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount

Company Overview

  • Affirm is a financial technology services company that offers installment loans to consumers at the point of sale. It was founded in 2012, and is headquartered in San Francisco, California, USA, with a workforce of 1001-5000 employees. Its website is https://www.affirm.com.
  • Company H1B Sponsorship

  • Affirm has a track record of offering H1B sponsorships, with 20 in 2026, 104 in 2025, 96 in 2024, 133 in 2023, 179 in 2022, 132 in 2021, 57 in 2020. Please note that this does not guarantee sponsorship for this specific role.
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