Source Job

$242,400–$303,000/yr
US Unlimited PTO 20w maternity 20w paternity

  • Own the technical roadmap and author system designs for scalable, secure, and operationally efficient card issuing and payment processing products.
  • Spend significant time in the codebase writing, reviewing, and optimizing code across the issuing and processing stack.
  • Identify and drive high-impact technical initiatives that improve performance, reliability, and cost-efficiency of core processing engines.

Java Kubernetes AWS Kafka

20 jobs similar to Principal Software Engineer

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$200,000–$250,000/yr
Global Unlimited PTO

  • Design, implement, and maintain our payment integrations platform, including partner APIs, SDKs, and embedded web experiences.
  • Help shape and drive the technical roadmap for the Partner Engineering team.
  • Design and develop scalable APIs and integrations to support money movements across banking partners via payment rails such as ACH.

Flex is a growth-stage, NYC headquartered FinTech company that creates the best rent payment experience. The company has an enthusiastic user base and is committed to radical transparency, integrity, and individual growth.

US Unlimited PTO 12w maternity 12w paternity

  • Develop core components on an Engineering pod with a focus on scalable backend services and RESTful APIs.
  • Measure and optimize the performance, scalability, and uptime of backend services.
  • Collaborate with product management, customer success, and support to deliver the best user experience.

Branch empowers workers with financial freedom by accelerating payments and providing accessible financial services. They are a remote-first FinTech company with a collaborative culture and employees across the U.S.

$145,000–$156,000/yr
Global

  • Lead design and development of product features for highly available payment processing, subscription billing, and reporting platforms.
  • Debug and troubleshoot complex issues, optimize system performance, and ensure reliability across money-movement flows.
  • Mentor junior team members and lead adoption of best practices for coding standards, testing, and deployment.

FastSpring is the world's leading ecommerce platform for software and SaaS companies, powering sales growth for over 3,500 companies in more than 200 countries. Founded in 2005 and privately owned, we are an Inc. 5000 honoree with offices globally and a remote-first, inclusive culture.

  • Design and develop scalable, high-performance, low-latency backend services using Java and AWS technologies.
  • Collaborate with product, frontend, and QA teams to define technical requirements and ensure smooth integration with other platform components.
  • Optimize existing services for maximum performance, reliability, and maintainability while implementing CI/CD best practices.

Oscilar builds an advanced AI Risk Decisioning Platform that helps banks, fintechs, and digital organizations manage fraud, credit, and compliance risk. The team includes industry veterans from Meta, Uber, Citi, and Confluent, and operates with a mission-driven culture emphasizing ownership and innovation.

United States Unlimited PTO 20w maternity 20w paternity

  • Lead the design and architecture of large-scale, complex systems for banking and money movement.
  • Take ownership of major technical initiatives, driving alignment with customer needs and business goals.
  • Mentor and guide other engineers, fostering technical growth and excellence across the team.

Marqeta is a card issuing platform enabling embedded finance for companies like Block, Cash App, and Uber. They are a publicly traded company with a culture of flexibility and innovation.

Global Unlimited PTO 16w maternity 16w paternity

  • Design, implement, and operate core services that power Docker’s Cloud Sandboxes platform.
  • Build scalable systems for microVM orchestration, workload scheduling, and lifecycle management.
  • Ensure system reliability, observability, and performance across Docker’s Cloud Sandbox infrastructure.

Docker is a globally distributed, remote-first company that builds tools for developers to build, share, and run applications. Trusted by over 20 million monthly users and 20 billion container image pulls, it has a collaborative culture focused on innovation and reliability.

$110,000–$130,000/yr
US 4w PTO

  • Design and build Java microservices and event-driven workflows on Kafka to power real-time clinical workflows for 100 million patients.
  • Develop cloud-native applications on AWS with CI/CD pipelines, observability, and secure coding practices.
  • Use AI tools like Claude daily for code generation, refactoring, test coverage, and documentation.

For 25 years, DrFirst has empowered providers and patients to achieve better health through intelligent medication management. It is a successful Healthcare IT company experiencing significant growth with a culture that values smart, interesting people solving unique challenges.

Global

  • Lead the design, development, and implementation of microservices for the next-generation enterprise campaign management platform.
  • Architect scalable and reliable solutions while collaborating with cross-functional teams including Product Managers and Quality Engineers.
  • Provide technical guidance, conduct code reviews, and stay current with emerging technologies to ensure high code quality and performance.

Miratech is a global IT services and consulting company that helps visionaries change the world. With nearly 1,000 full-time professionals and over 25% annual growth, the company operates across 5 continents and 25+ countries, maintaining a culture of Relentless Performance with a 99% project success rate since 1989.

Unlimited PTO

  • Own and evolve cloud infrastructure and CI/CD pipelines, driving projects from inception to deployment.
  • Gain deep knowledge of the backend stack (Java Spring Boot) and optimize system reliability and scalability.
  • Actively adopt AI tools to enhance productivity, automate infrastructure provisioning, and ensure security.

Archy is a Series B vertical SaaS company that provides AI-powered software to revolutionize dental practice management. The company has a growing, collaborative team with a remote-friendly culture.

$200,000–$250,000/yr
US Unlimited PTO

  • Design and scale backend services powering Flex's core financial infrastructure, including payments, billing, and ledger systems.
  • Lead architecture of highly available, fault-tolerant financial platforms processing millions in transactions.
  • Partner with Product, Finance, Risk, Compliance, and Engineering teams to deliver scalable payment experiences.

Flex is a growth-stage FinTech company that creates the best rent payment experience, enabling users to pay rent on a flexible schedule. With unprecedented investor support and an enthusiastic user base, Flex fosters an inclusive culture with a diverse team across the US, Australia, Canada, and South America.

Canada

  • Own and deliver quarterly goals for your team, leading through ambiguity.
  • Collaborate with product, design, and analytics to articulate technical constraints and make decisions.
  • Foster a culture of quality and ownership through code review and design standards.

Affirm is a financial technology company that offers buy now, pay later services with no hidden fees. Zero To One is a small, autonomous innovation lab within Affirm focused on rapid prototyping and AI-powered solutions.

US

  • Break down larger projects into individual tasks and deliver them in multiple phases with collaboration.
  • Support the product development lifecycle by partnering with product management, design, and analytics on risks and trade-offs.
  • Support operations and availability by creating and monitoring metrics and participating in on-call efforts.

Affirm is reinventing credit to make it more honest and friendly, offering buy now, pay later solutions. The company has a remote-first culture and employs thousands, focusing on transparency and inclusivity.

UK

  • Design, develop, and optimize scalable shared backend services using Java and serverless technologies (AWS Lambda).
  • Design and implement RESTful APIs and event-driven systems, contributing to frontend components as needed.
  • Collaborate with cross-functional teams, mentor junior developers, and maintain CI/CD pipelines for high-quality software delivery.

Turnitin is a recognized innovator in global education, partnering with educators and institutions for over 25 years to develop learning integrity solutions. With over 16,000 academic institutions and team members in 35+ countries, the company fosters a remote-first culture focused on purpose, accountability, and well-being.

US

  • Design and implement scalable systems for Trust & Safety engineering.
  • Lead the architecture of digital armor to mitigate fraud and billing anomalies.
  • Mentor senior engineers and establish engineering best practices.

Rula is a remote-first mental healthcare company dedicated to evidence-based and compassionate care. They focus on building trust with payers, patients, and providers through scalable technology.

$220,000–$258,000/yr
Global Unlimited PTO 18w maternity 12w paternity

  • Set technical direction for the Athena clearing house, making architectural calls on data validation pipelines and workflow orchestration.
  • Scale the team and product area, driving transition from rapid prototyping to sustainable, production-grade product stack.
  • Lead design of systems processing unstructured vulnerability reports, deduplicating findings, and surfacing clean signals to remediation teams.

Chainguard secures the open source software supply chain, delivering hardened, production-ready builds of open source software. They are venture-backed by leading investors and serve Fortune 500 enterprises and global industry leaders.

US

  • Develop scalable platforms, services, and internal tooling to power Rula’s Revenue Cycle Management operations.
  • Build and maintain systems supporting payments, claims submission, and operational workflows across the revenue cycle.
  • Collaborate with engineering, operations, and business stakeholders to improve efficiency, reliability, and cost effectiveness.

Rula is a mental healthcare provider dedicated to evidence-based, compassionate care that empowers individuals to take charge of their well-being. As a remote-first company, we hire in most U.S. states and foster a culture of inclusion, diversity, and equity.

$264,000–$330,000/yr
US Unlimited PTO 16w maternity 16w paternity

  • Lead the design of fault-tolerant, observable integrations with third-party services to support growing transaction volume.
  • Build abstractions and standards for engineering teams to ship faster and more safely on the payment platform.
  • Set technical direction across Payment Platform and Clearinghouse Platform teams as a hands-on technical leader.

Headway is building a new mental healthcare system by automating insurance admin for providers, making therapy accessible to everyone. They are a Series D company with $325M+ in funding and over 75,000 providers using their software.

$140,000–$180,000/yr
US Unlimited PTO

  • Provide frontline technical expertise to help developers deploy and scale Temporal in cloud-native environments.
  • Troubleshoot complex infrastructure issues, optimize performance, and develop automation solutions.
  • Collaborate with engineering and product teams to influence platform improvements and enhance developer experience.

Temporal provides an open source programming model that simplifies code and makes applications more reliable. The company is a growing team driven by values of curiosity, collaboration, and humility, focused on improving developer experience.

US Unlimited PTO

  • Lead the engineering team building a scalable, AI-driven, cloud-native Coordination of Benefits solution from the ground up.
  • Set technical direction, own architecture, and drive engineering standards for a new product and growing team.
  • Partner cross-functionally with product, ML, UX, and operations to translate requirements into measurable outcomes.

Machinify is a healthcare intelligence company that delivers unmatched value, transparency, and efficiency to health plan clients using an AI-powered platform. Deployed by over 85 health plans, including many of the top 20, and representing more than 270 million lives, we are constantly reimagining what's possible in our industry.

US Unlimited PTO 20w maternity 20w paternity

  • Design, build, and maintain highly available Kubernetes infrastructure at scale.
  • Lead design for components and features, and contribute to architecture decisions for container orchestration.
  • Mentor engineers on Kubernetes best practices and drive initiatives to improve system reliability.

Marqeta provides a card issuing platform for companies to issue cards, authorize transactions, and manage payment operations in real time. They are a publicly-traded company with a Flex First culture that values remote work and employee growth.