We are Billie, the leading provider of Buy Now, Pay Later (BNPL) payment methods for businesses, offering B2B companies innovative digital payment services and modern checkout solutions. We are to create a new standard for business payments and have made it our mission to simplify the purchasing experience for all businesses making it a tool for growth. Our solutions are based on proprietary, machine-learning-supported risk models, fully digitized processes and a highly scalable tech platform. This makes us a deep-tech company building financial products, not the other way around. We love building simple and elegant solutions and we strive for automation and scalability.

WHO WE ARE LOOKING FOR:

• Someone with 8+ years of software development experience
• Deep expertise in React.js and component-based architecture
• Advanced TypeScript proficiency
• Hands-on experience with xState and the Context API for state management
• Strong commitment to accessibility standards and comprehensive testing (unit, integration, E2E)

Transform the future of payments for 500K+ companies worldwide as a Senior Frontend Developer on our Checkout Team. Your expertise will revolutionize how millions experience transactions, creating seamless, secure, and scalable payment journeys. You’ll take ownership of critical technical landscapes including our modular checkout widget, hosted payment page, Demoshop, and checkout SDK, while bridging connections between external payment service providers and internal teams focused on authorization, risk, and onboarding.

In more detail you will:

• Collaborate with Product Managers and UI/UX Designers to craft exceptional user experiences that millions interact with daily
• Pioneer improvements to development processes that enhance developer experience (DX) without sacrificing delivery speed
• Orchestrate seamless end-to-end design and integration across teams and systems
• Lead crucial trade-off discussions that balance performance, scalability, and user experience
• Elevate team capabilities by mentoring and coaching through workshops, pair programming, and code reviews
• Help shape our team’s future by attracting, reviewing, and interviewing top talent

Our frontend architecture employs a monorepo approach with applications built using Next.js, React, and TypeScript, powered by shared libraries and a unified design system. Our technology stack includes Context API and xState for state management, Jest, React Testing Library, Cypress, and Storybook for testing and documentation, plus Nx, Jenkins, and GitHub Actions for CI/CD and tooling.