Principal Software Engineer

We are seeking a Principal Software Engineer – Payments & Fin Tech to design, build, and scale modern payment solutions supporting millions of transactions across digital commerce, hospitality, restaurant, and retail environments. This individual will play a critical role in developing secure, high-performance payment infrastructure that powers merchant onboarding, transaction processing, digital wallets, subscription billing, point-of-sale integrations, and financial reporting. The ideal candidate combines strong software engineering expertise with a deep understanding of payment ecosystems, financial technology, and regulatory compliance.

We are seeking a Principal Software Engineer – Payments & Fin Tech to design, build, and scale modern payment solutions supporting millions of transactions across digital commerce, hospitality, restaurant, and retail environments. This individual will play a critical role in developing secure, high-performance payment infrastructure that powers merchant onboarding, transaction processing, digital wallets, subscription billing, point-of-sale integrations, and financial reporting. The ideal candidate combines strong software engineering expertise with a deep understanding of payment ecosystems, financial technology, and regulatory compliance.

• Design and develop scalable payment processing platforms and APIs.
• Build integrations with payment gateways including Stripe, Adyen, Braintree, Square, and other processors.
• Develop solutions supporting card-present and card-not-present transactions.
• Create integrations with POS systems, restaurant management platforms, ecommerce platforms, and third-party financial systems.
• Design and implement merchant onboarding and account management workflows.
• Build recurring billing, subscription management, invoicing, and settlement solutions.
• Develop fraud detection, transaction monitoring, and risk management capabilities.
• Collaborate with Product, Operations, Finance, and Customer Success teams to deliver new payment products.
• Optimize system performance, reliability, scalability, and security.
• Ensure compliance with PCI-DSS, SOC 2, and financial regulatory requirements.
• Participate in architectural design reviews and technical leadership initiatives.
• Mentor junior engineers and contribute to engineering best practices.

• 7+ years of software engineering experience.
• 3+ years developing payment processing or financial technology solutions.
• Experience integrating with payment gateways such as Stripe, Adyen, Braintree, Square, or
• Strong experience developing RESTful APIs and distributed systems.
• Experience building cloud-native applications in AWS, Azure, or Google Cloud.
• Proficiency with one or more backend technologies:
• C# / .NET
• Node.js
• Go
• Python
• Strong SQL and database design experience.
• Experience with containerization and orchestration technologies such as Docker and Kubernetes.
• Understanding of PCI-DSS compliance and payment security standards.
• Experience with CI/CD pipelines and modern Dev Ops practices.

• Experience supporting restaurant technology platforms.
• Experience with POS systems including Toast, NCR Aloha, Oracle Micros, Clover, or Square.
• Knowledge of ACH, RTP, Open Banking, and digital wallet technologies.
• Experience with embedded payments and payment facilitation models.
• Familiarity with KYC, AML, and merchant underwriting processes.
• Experience designing event-driven architectures and microservices.
• Exposure to high-volume transaction processing environments exceeding millions of transactions annually.

Deliver scalable payment solutions supporting business growth.

We are committed to diversity and inclusivity in our hiring practices.