Senior Software Engineer, Full Stack

Payabli is a next-generation Payments Infrastructure and Monetization Platform purpose-built for vertical software companies. As a Senior Software Engineer, Full Stack at Payabli, you’ll own the interfaces between complex financial infrastructure and users, focusing on building user-friendly applications and components while ensuring high standards of performance and security.

Responsibilities:

• Build the product people touch. Design, develop, and maintain the frontend applications and reusable component libraries that power Payabli’s, and its partners, platforms
• Ship embeddable experiences. Build hosted payment forms, white-label components, and drop-in UI that third-party platforms integrated directly with their own products. Your code needs to be lean, flexible and rock-solid as it will be running inside other people’s software
• Bridge frontend and backend. Collaborate closely with other service owning teams to integrate via APIs and real-time data streams, ensuring seamless data flow across the stack & overall platform
• Raise the bar. Lead code reviews, champion frontend standards, and drive architectural decisions that keep the codebase healthy as we scale
• Multiply the team. Mentor engineers around you and elevate frontend engineering quality across the organization through pairing, documentation and leading by example
• Own the full lifecycle. Work across requirements, implementation, testing, and deployment. We don’t throw things over the wall here
• Sweat the details. Optimize for performance, accessibility, and cross-browser compatibility

Requirements:

• 5+ years of professional frontend engineering experience. You've shipped real products to real users
• React, Typescript and Node.js fluency. You don't just use React, you understand its rendering model, know when to reach for which patterns, and can reason about performance at the component level
• Strong understanding of CSS and responsive design. You can build pixel-perfect, accessible interfaces without leaning on a framework for everything
• API integration experience. You've shipped products that rely upon APIs from multiple services and know to gracefully handle loading states, errors, and edge cases
• State management chops. Experience with Redux, Zustand, or similar frameworks. You have strong opinions on what is the right tool when
• Strong communicator. You enjoy walking your partners (design, PM, other engineers, leadership) through technical trade-offs
• Security awareness. Web security principles (XSS, CSRF, CSP, etc.) and build with them in mind from step on
• A degree in Computer Science, or related field (or equivalent experience – we care more about how you operate and what you can build)
• Prior experience in fintech or payments technology. Especially as it relates to good payments UX: checkout flows, merchant onboarding, reconciliation dashboards, or similar financial interfaces
• Experience building embeddable or white-label UI components. Bonus points if you've dealt with CSS isolation, versioning and cross-origin challenges