Source Job

$195,000–$220,000/yr
US

  • Build and own backend services and APIs for policy, coverage, enrollment, and regional rules that scale to new markets.
  • Translate regional regulatory and product requirements into configurable, reusable platform capabilities.
  • Partner with Product, Design, Data Science, and Legal to prioritize high-impact work and drive data-informed improvements.

Java Python Go SQL A/B Testing

20 jobs similar to Senior Software Engineer, Payments

Jobs ranked by similarity.

Canada Unlimited PTO

  • Design and build scalable backend systems, APIs, and data models that power communications, experimentation, and personalization.
  • Partner with Product, Data Science, and Experience teams to define and execute strategies for customer acquisition and engagement.
  • Mentor and support junior engineers, contributing to a culture of learning, collaboration, and technical excellence.

Affirm is a financial technology company that provides point-of-sale installment loans to consumers, allowing them to pay over time with no hidden fees. The company is remote-first and values transparency, care, and flexibility, with a strong emphasis on employee well-being and professional growth.

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.

$135,780–$172,280/yr
North America

  • Shape the technical foundation for money movement capabilities and unlock new product lines globally.
  • Guide the design and development of reliable, scalable, performant, and secure payment platform services.
  • Contribute directly to production code and proof-of-concepts, solving complex fintech challenges at massive scale.

Xero is a global cloud-based accounting software platform designed for small businesses. With thousands of employees worldwide, the company fosters a culture of technical excellence, inclusion, and continuous innovation.

$217,000–$303,000/yr
United States

  • Partner with cross-functional teams to design and deliver scalable backend systems for major product initiatives.
  • Own the full software lifecycle from technical design to rollout, using A/B experiments and data analysis to drive decisions.
  • Build and maintain high-performance APIs and distributed services using modern languages and tools.

Reddit is a community of communities, built on shared interests, passion, and trust. It is home to the most open and authentic conversations on the internet, with 100,000+ active communities and approximately 130 million daily active unique visitors.

US Unlimited PTO

  • Design and implement backend systems for trust and safety at scale.
  • Collaborate with product, design, and analytics to ensure technical sustainability.
  • Foster a culture of quality through code reviews, 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 focus on engineering excellence and scalable solutions.

APAC

  • Implement production backend features for payment flows.
  • Refactor legacy services, modernize APIs, and improve test coverage.
  • Collaborate with product managers and partner teams to deliver end-to-end solutions.

They build and operate scalable, revenue-critical payment infrastructure for modern fintech and billing systems. The organization works in a remote-first, contract-based model with a culture of agility, clean code, and async collaboration.

LatAm

  • Write production-quality backend code in Kotlin or Python for the Affirm Card product.
  • Design systems and contribute to implementation, building APIs and data models for service-oriented architectures.
  • Collaborate cross-functionally with Product, Analytics, and engineering teams to execute strategy, and participate in on-call processes.

BlueCloud is a Snowflake Elite Partner helping enterprises move to unified, AI-ready data platforms. With 450+ consultants and 200+ transformations, they deliver data solutions 40-50% faster, serving clients across finance, healthcare, and more.

$158,000–$248,000/yr
US

  • Architect and implement backend services for secure file storage and third-party integrations.
  • Design event-driven systems for real-time permission propagation at enterprise scale.
  • Mentor engineers and drive engineering best practices while exploring AI-powered file capabilities.

Addepar is a global data and AI platform that unifies portfolio, market, and client data for investment professionals. Serving over 1,500 firms managing nearly $10 trillion in assets, the company fosters a culture of ownership, collaboration, and continuous learning.

$204,000–$290,000/yr
US Unlimited PTO

  • Set technical strategy for the team and drive large-scale, business-impacting projects.
  • Collaborate with product, design, and analytics to ensure technical sustainability and manage trade-offs.
  • Foster engineering quality and talent development through code review standards and mentorship.

Affirm is a financial technology company that provides transparent, flexible payment solutions, allowing consumers to pay over time without hidden fees. The company is remote-first and values inclusivity, offering competitive 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.

$146,000–$225,000/yr
US Unlimited PTO

  • Break down larger projects into individual tasks and deliver them in phases with support from your tech lead and manager.
  • Collaborate with product management, design, and analytics to make decisions that consider risks and trade-offs.
  • Support operations and availability of your team's artifacts by creating metrics and participating in on-call efforts.

Affirm is a financial technology company that provides transparent, flexible payment solutions. The company is remote-first and fosters a culture of care, transparency, and flexibility.

$146,200–$215,000/yr
US Unlimited PTO

  • Design, build, and scale backend services for payment, billing, and identity, leading scoping and implementation of APIs.
  • Drive production rollouts to completion with minimal oversight, working closely with product and engineering peers.
  • Collaborate with teams like Partner Integrations, Fin Platform, and Money to solve renters' problems in small, frequent iterations.

Flex is a fintech company that enables renters to pay rent throughout the month on a flexible schedule. It is a growth-stage NYC headquartered company with a dynamic team located throughout the US, Australia, Canada, and South America, and offers an inclusive culture.

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.

US

  • Lead the architecture and design of distributed systems supporting millions of insurance leads and transactions.
  • Mentor senior and mid-level engineers while driving technical direction across microservices, APIs, and cloud-native infrastructure.
  • Use Java and polyglot tools like Kotlin, Python, Go, and TypeScript to build scalable, reliable, observable platforms.

The company operates high-traffic platforms supporting millions of insurance leads and transactions. It fosters a collaborative, remote-first engineering culture with opportunities to mentor engineers and shape technical direction.

$145,500–$235,400/yr
US

  • Design, implement, test, and operate production services and APIs.
  • Lead projects or meaningful components of projects from problem definition through deployment and iteration.
  • Improve the observability and operability of the systems you own, including metrics, logs, traces, alerting, and incident learnings.

LaunchDarkly provides a platform that helps engineering teams release software and AI with speed, safety, and control using feature flags and observability. The company is growing and emphasizes teamwork, humility, openness, curiosity, and inclusive collaboration.

US Unlimited PTO

  • Break down larger projects into individual tasks and deliver them in phases.
  • Collaborate with product management, design, and analytics on technical decisions.
  • Support the operations and availability of team artifacts through monitoring and on-call efforts.

Affirm provides a clear, predictable way to pay over time, with no hidden fees. The company is a remote-first fintech that values transparency and care, offering comprehensive benefits and a collaborative culture.

India

  • You will design, develop, and maintain backend services powering Twilio Flex's high-scale TaskRouter system.
  • You will set technical direction for distributed systems, owning architecture for cross-team problems spanning multiple quarters.
  • You will raise the engineering bar through design review, code review, and mentorship of senior and mid-level engineers.

Twilio is shaping the future of communications by delivering innovative solutions to hundreds of thousands of businesses and empowering millions of developers worldwide. As a remote-first company with a strong culture of connection and global inclusion, we have a diverse team making a global impact each day.

$170,000–$235,000/yr
US

  • Design and implement backend services for licensing, entitlements, feature access, and usage limits across NodeZero's product and APIs.
  • Build and evolve provisioning, admin experience, MSP/MSSP capabilities, and audit logging for a multi-tenant SaaS platform.
  • Operate production services with monitoring, incident response, and a high bar for design quality and test coverage.

Horizon3 is a fast-growing, remote cybersecurity company that helps organizations proactively find, fix, and verify exploitable attack vectors through its NodeZero autonomous pentesting platform. The team is a fusion of former special operations cyber operators and startup engineers, fostering a culture of respect, collaboration, ownership, and results.

$150,000–$185,000/yr
US Unlimited PTO

  • Own the money side of Splash: deposits, withdrawals, entry fees, payouts, fraud checks, and the double-entry ledger tying every cent back to player wallets and contests.
  • Design and run backend services on NodeJS and TypeScript in AWS, working closely with Finance, Compliance, and engineers in the US and Prague.
  • Automate reconciliation, build payment processor integrations, and ensure exactly-once posting, audit trails, and safe concurrency in a regulated real-money environment.

Splash brings people and communities together through the gamification of live sports and events. We're a small, quickly growing, remote-first team that loves sports and tech startups.