Senior Software Engineer - Frontend

Welcome to the Agentic Commerce Era At Commerce, our mission is to empower businesses to innovate, grow, and thrive with our open, AI-driven commerce ecosystem. As the parent company of BigCommerce , Feedonomics , and Makeswift , we connect the tools and systems that power growth, enabling businesses to unlock the full potential of their data, deliver seamless and personalized experiences across every channel, and adapt swiftly to an ever-changing market. Simply said, we help businesses confidently solve complex commerce challenges so they can build smarter, adapt faster, and grow on their own terms. If you want to be part of a team of bold builders, sharp thinkers, and technical trailblazers, working together to shape the future of commerce, this is the place for you. BigCommerce, part of the Commerce brand family, helps merchants increase sales at every stage of their growth. From small startups to mid-market businesses and large enterprises, we provide the leading e-commerce platform. Our customers can then concentrate on what's most important: growing their businesses. We enable our customers to build, innovate, and grow, collectively reshaping the e-commerce industry. The Commerce Checkout team is looking for a Senior Software Engineer who wants to make an impact at every level of society by powering innovators, creative thinkers, entrepreneurs, and business owners around the world to be successful at every stage of their growth. The Commerce Checkout Engineering team is responsible for building, operating, and continuously improving the core checkout experience on the BigCommerce platform-one of the most business-critical and revenue-sensitive areas of the product. At a high level, the team’s purpose is to ensure that merchants can reliably convert shoppers into buyers through a secure, performant, scalable, and flexible checkout flow . What The Team Owns Designs and maintains checkout functionality and APIs , including cart-to-order flows and integrations with payment systems Ensures high availability, performance, and correctness for checkout-related services, given their direct impact on merchant revenue Partners closely with Product to evolve checkout capabilities while balancing quality, security (PCI), and speed of delivery Owns incident management and on-call responsibilities for checkout services due to their critical nature The Commerce Engineering organisation is on a mission to build the leading SaaS ecommerce platform. We work closely with engineering teams across multiple domains, product managers, designers, business stakeholders, and external partners to build a platform where we can easily and securely deliver new and alternative user experiences. Our team brings together people with varied experience and strengths, and we iterate, learn, and build great software together. What You'll Do Build high-quality front-end features using React and TypeScript, with a focus on clarity, performance, and maintainability Refactor legacy or complex areas of the codebase to improve readability, testability, and long-term health Identify and fix issues across the stack, from front-end behavior to API calls, ensuring solutions are robust and scalable Collaborate closely with product managers, designers, and other engineers to define requirements, refine stories, and deliver predictable outcomes Provide thoughtful code reviews, offer technical guidance to less experienced engineers, and contribute to a culture of continuous improvement Help shape the technical direction of the team through practical suggestions, hands-on implementation, and identifying opportunities to reduce friction or complexity Contribute to improving our front-end developer experience, including building tools, testing practices, and performance optimisations Ensure technical decisions support our goals of quality, performance, reliability, and security Work with and contribute to open source codebases, including evaluating, ext ... (truncated, view full listing at source)