Source Job

UK Unlimited PTO

  • Design, develop, and launch backend systems and APIs at scale using Python or Kotlin.
  • Collaborate with product, design, and analytics to break down projects and deliver timely solutions.
  • Support operations by creating metrics, monitoring, and participating in on-call efforts.

Python Kotlin AWS MySQL Kubernetes

20 jobs similar to Software Engineer II, Backend (Payments)

Jobs ranked by similarity.

$64,750–$94,750/yr
Poland

  • Break down projects into tasks and deliver them in phases with your team.
  • Partner with product, design, and analytics to build scalable backend systems.
  • Monitor metrics, support on-call, and contribute to code reviews.

Affirm exists to give people a clear, predictable way to pay over time, with no hidden fees. It is a remote-first company that cares about employee well-being through comprehensive benefits and an inclusive culture.

$78,840–$117,720/yr
Spain Unlimited PTO

  • Break down complex projects into tasks and deliver them in phases with your team.
  • Collaborate with product, design, and analytics to build scalable card experiences.
  • Support operations and on-call efforts, improving system reliability and availability.

Affirm is a financial technology company that offers clear, predictable pay-over-time solutions with no hidden fees. It is a remote-first company with a collaborative culture focused on transparency, flexibility, and employee well-being through comprehensive benefits.

Canada Unlimited PTO

  • Break down larger projects into individual tasks and deliver them in phases while collaborating with your team.
  • Partner with product, design, and analytics to articulate technical constraints, assess trade-offs, and shape decisions.
  • Support system availability by creating and monitoring metrics, escalating issues, and participating in on-call efforts.

Affirm is a financial technology company offering point-of-sale installment loans and payment solutions that let consumers pay over time predictably. It is a publicly traded, remote-first company with a global engineering team and a culture centered on transparency, customer trust, and flexibility.

Canada Unlimited PTO

  • Work with technical leaders to design and implement forward-looking approaches for checkout systems.
  • Own components of checkout systems and define their long-term health.
  • Collaborate with engineers to build the next generation of the checkout platform.

Affirm provides a clear, predictable way to pay over time through buy now, pay later solutions. It is a remote-first company with a culture focused on honesty, trust, and customer-centric innovation.

UK Unlimited PTO

  • Build and operate systems for bank and card payments across Affirm’s international markets.
  • Collaborate with product, analytics, and engineering teams to solve challenges across currencies and customer needs.
  • Foster a culture of quality and ownership through code review, design standards, and mentoring.

Affirm provides a clear, predictable way to pay over time with no hidden fees. It is a remote-first company with a global team, emphasizing transparency and flexibility.

Poland

  • Set the technical strategy for the Recoveries platform and drive cross-team initiatives that optimize recovery strategies and strengthen reliability.
  • Collaborate with product management, design, and analytics to manage technical sustainability, risks, and trade-offs across the product lifecycle.
  • Foster a culture of quality and ownership by setting code review and design standards, while developing talent through feedback and guidance.

Affirm provides clear, predictable payment solutions with no hidden fees, helping people pay over time for the moments that matter. The company is remote-first and values transparency, flexibility, and employee well-being.

$77,000–$107,000/yr
Poland

  • Own and deliver quarterly technical goals for the Communications area.
  • Design reliable backend services for high-volume, multi-region messaging infrastructure.
  • Collaborate with engineering partners and support on-call operations.

Affirm builds honest financial products that give people a clear, predictable way to pay over time with no hidden fees. It is a remote-first company focused on reliable, performant, and scalable engineering solutions.

$92,880–$131,760/yr
Spain

  • Own and deliver quarterly technical goals for the Communications area, solving ambiguous problems in messaging infrastructure.
  • Design and scale reliable backend services for high-volume communications across multi-region, multi-tenant environments.
  • Collaborate with product, design, analytics, and engineering partners while mentoring teammates and supporting on-call rotation.

Affirm is a financial technology company providing a clear, predictable way to pay over time with no hidden fees. It is a remote-first organization focused on care, transparency, and flexibility, with fully subsidized health coverage and flexible time off.

Canada Unlimited PTO

  • Own and deliver quarterly goals, leading engineers through ambiguity and ensuring support.
  • Collaborate with product, design, and analytics to make decisions considering risks and trade-offs.
  • Support operations and availability of team artifacts while fostering quality and ownership.

Affirm provides clear, predictable buy now, pay later services with no hidden fees. It is a growing, remote-first company that values transparency, flexibility, and customer trust.

US Unlimited PTO

  • Drive technical strategy for the card loan platform by leading planning and execution of projects.
  • Design and develop large-scale, high-availability services with robust APIs and data models.
  • Collaborate across functions with product, analytics, and other teams to define requirements and execute card loan strategy.

Affirm provides a clear, predictable way to pay over time for purchases, with no hidden fees. It is a remote-first company experiencing explosive growth and fostering a culture of care, transparency, and flexibility.

Canada Unlimited PTO

  • Design and build the gateway, runtime, and evals services for AI workloads at scale.
  • Own technical decisions from design to launch, including identity, quota, and failover controls.
  • Partner with security and infrastructure teams to set guardrails for agentic workloads.

We provide clear, predictable pay-over-time financial products with no hidden fees. We are a remote-first company with an engineering culture centered on blameless postmortems and detailed technical design.

$146,000–$225,000/yr
US Unlimited PTO

  • Build and ship customer-facing authentication features like MFA and step-up authentication.
  • Develop backend services and APIs in Python or Kotlin.
  • Collaborate with engineering and product partners to deliver scoped identity features.

Affirm is a financial technology company offering buy now, pay later services with no hidden fees. It is a remote-first company that values transparency and flexibility, with a focus on caring for employees through comprehensive benefits.

$199,000–$235,000/yr
US

  • Design, build, and operate backend services and workflows that provision customer accounts and activate product entitlements.
  • Own projects from technical design through release, observability, and production support.
  • Build reliable asynchronous workflows with safe retries, idempotency, and failure recovery.

Horizon3 builds NodeZero, an autonomous pentesting platform that helps organizations find, fix, and verify exploitable attack vectors. The remote team of former special ops operators and engineers values respect, collaboration, ownership, and results.

$166,900–$230,900/yr
US

  • Design, develop, and evolve high-performance, real-time pricing systems for critical lending decisions.
  • Lead complex engineering projects from technical design through production deployment, ensuring scalability and reliability.
  • Collaborate with data scientists, product managers, and business stakeholders to turn models into robust software solutions.

This company builds core pricing infrastructure that powers critical lending decisions across financial products. It offers a remote-first environment with a collaborative culture across engineering, data science, and product teams.

$162,000–$186,000/yr
US

  • Design, develop, and maintain scalable backend services and APIs for policy management and enrollment workflows.
  • Collaborate with Product, Data Science, Legal, and engineering teams to translate requirements into technical solutions.
  • Implement monitoring, logging, and experimentation capabilities to ensure reliability and support data-driven decisions.

This partner company builds backend infrastructure that powers insurance and protection products across global markets with a growing engineering team. It offers remote work flexibility, cross-functional collaboration, and an inclusive workplace.

US Unlimited PTO

  • Break down larger projects into individual tasks and deliver them in phases.
  • Collaborate with product, design, and analytics to make risk-aware decisions.
  • Support operations by creating metrics and participating in on-call efforts.

Affirm exists to provide clear, predictable pay-over-time solutions with no hidden fees, connecting consumers with merchant partners through a personalized shopping experience. As a remote-first company, Affirm values transparency, flexibility, and inclusion, offering comprehensive benefits and opportunities for growth.

US

  • Design, build, test, and deploy backend features across payments, fraud, compliance, and user management
  • Integrate with banks, card networks, and third-party services, handling the edge cases money movement demands
  • Write and review technical designs and participate in architecture discussions for distributed, event-driven systems

Astra builds mission-critical infrastructure for moving money at scale, processing billions in annual transaction volume. They are a small, remote-first team with a culture of thoughtful collaboration and initiative.

US Unlimited PTO

  • Set technical strategy and align your team with critical, business-impacting projects.
  • Collaborate cross-functionally with product management, design, and analytics to manage technical risks and trade-offs.
  • Foster a culture of quality, ownership, and operational excellence through monitoring, testing, and engineering standards.

Affirm provides a clear, predictable way to pay over time through installment loans, with no hidden fees or surprises. It is a remote-first company that values transparency, flexibility, and employee well-being, offering comprehensive benefits and a collaborative culture.

North America

  • Take deep ownership of key systems and product areas, becoming the technical expert and primary point of reference.
  • Architect, build, and maintain highly available and scalable REST APIs and backend services.
  • Use agentic development workflows and AI coding tools as standard engineering practice.

This partner company builds an AI-driven e-commerce messaging platform powered by customer context and data. It is a high-growth, remote-first environment with a collaborative and supportive culture.

North America Unlimited PTO

  • Take deep ownership of systems and product areas, becoming the go-to technical expert for what you own.
  • Architect, build, and maintain highly available, scalable REST APIs and backend services across distributed systems.
  • Build agentically with AI coding tools, staying at the forefront of emerging AI tooling and practices.

Postscript is an AI messaging platform for Shopify brands, helping e-commerce marketers drive revenue through SMS marketing and AI features. Backed by Greylock and Y Combinator, the company has been fully remote since 2018 and serves 20,000+ Shopify brands with a culture of ownership and AI-first development.