Senior Software Engineer - B2B

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. We believe in harnessing AI responsibly to unlock new possibilities, and we’re looking for individuals who use it intentionally to solve problems, accelerate outcomes, and expand what’s possible in their role. Our purpose is to 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 who shape the future of commerce, this is the place for you. The Commerce B2B 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. 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. At a high level the Commerce B2B Engineering team builds the systems that allow BigCommerce merchants to run real-world B2B businesses—handling complex buyers, pricing, workflows, and scale that standard ecommerce platforms don’t support. 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 Who You Are You have at least 4 years of hands-on experience building front-end applications with React and TypeScript, and you’ve worked on complex or long-lived codebases Education: Preferred Minimum Bachelor's degree in CS, EE, SW, CE, MIS; or equivalent experience You write maintainable, well-tested code and care about leaving things better than you found them You’re comfortable working in existing systems as much as building new ones, and you enjoy simplifying code, refactoring, and untangling complexity You’re a clear communicator who can explain technical details and trade-offs to both engineers and non-engineers You take ownership of outcomes, follow through on commitments, and hold yourself to a high standard of reliability You enjoy mentoring and supporting others, and you contribute positively to the team’s culture and technical growth You stay up to date with modern tools and approaches without being dogmatic. Your goal is to find the right solution, not the trendiest one You’re proactive, curious, and comfortable working independently when needed while still being a strong collaborator Work Where You Thrive For candidates based in the Sydney Metro area, this role follows a hybrid work model, with three days per week in the office to balance focused individual work and meaningful in-person collaboration. #LI-GC1 #LI-REMOTE Inclusion and Belonging At Commerce, we believe that celebrating the unique histories, perspectives and abilities of every employee makes a difference for our company, our customers and our community. We are an equal opportunity employer and the inclusive atmosphere we build together will make room for every person to contribute, grow and thrive. We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the interview process, to perform essential job functions and to receive other benefits and privileges of employment. If you need an accommodation in order to interview at Commerce, please let us know during any of your interactions with our recruiting team. Learn more about the Commerce team, culture and benefits at https://www.commerce.com/careers/ Protect Yourself Against Hiring Scams: Our Corporate Disclaimer Commerce, along with many other employers, has become the subject of fraudulent job offers to hopeful prospective job seekers. Be advised: Commerce does not offer jobs to individuals who do not go through our formal hiring process. Commerce will never: require payment of recruitment fees from candidates; request personally identifiable information through unsanctioned websites or applications; attempt to solicit money from you as part of the hiring process or as part of an employment offer; solicit money to complete visa requirements as part of a job offer. If you receive unsolicited offers of employment from Commerce, we urge you to be extremely cautious and avoid engaging or responding.