Senior Software Engineer (AI Agents)

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. Commerce is building a new team to deliver a suite of conversational AI agents spanning the B2B commerce lifecycle - Product Discovery, Pricing & Quoting, Order Automation, Fulfillment & Delivery, and Post-Sale Support. These agents will let B2B buyers and sellers work through complex commerce workflows in natural language, built on an established internal agent platform (Go/Python, Google ADK, Gemini, AG-UI, Braintrust). As the Senior Frontend Engineer on this team, you will own the unified agent frontend: a single streaming, generative-UI experience through which merchants and buyers interact with all five agents. This is a greenfield product built on proven platform patterns - you'll shape the user-facing surface of an entirely new product line. 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. What You'll Do • Design and build the unified agent frontend, delivering real-time streaming conversational experiences over SSE (AG-UI protocol) • Build and extend a library of generative UI components (product cards, cart and order summaries, quote views, escalation flows) rendered dynamically from agent output • Deliver the merchant-facing control panel settings and shopper-facing views for the agent suite • Own frontend architecture decisions: component structure, state management for streaming data, theming and embedding strategies across storefront environments • Collaborate closely with backend agent engineers on the client↔server event protocol and client-executed tools • Partner with product and design to deliver intuitive, useful, and delightful conversational experiences • Quickly build proof-of-concept solutions to validate user stories, then harden them for GA • Mentor other engineers and raise the bar on frontend quality across the team Who Are You • 5+ years of frontend or full-stack software development experience • Education: Preferred minimum Bachelor's degree in CS, EE, SW, CE, MIS; or equivalent experience • Expert-level Javascript skills • Experience building real-time or streaming UIs (SSE, WebSockets) and managing the state challenges they create • Experience building conversational or AI-assistant UIs (chat, generative UI, copilots) • Strong product sense and demonstrated ability to own a user-facing surface end-to-end • Experience integrating frontends with complex backend APIs • Excellent problem-solving skills and comfort in a fast-paced, exploratory environment • Strong collaboration and communication skills in cross-functional teams • Strong preference toward execution and delivery Preferred • Experience with e-commerce platforms or SaaS product development • Familiarity with design systems and embedding UIs into third-party or themed environments • Exposure to LLM-based products and their frontend patterns (token streaming, tool-call rendering, approval flows • Experience with automation tools or AI copilots Work Where You Thrive For candidates based in the Austin or Atlanta metro area, the position follows a hybrid work model with three days per week in the office, balancing focused individual work with meaningful in-person collaboration. (Pay Transparency Range: $116,000.00 - $195,000.00) Compensation Transparency The national base salary range for this role is posted above in this job post. Final compensation will be determined based on factors such as relevant experience, skills, qualifications and geographic location. We also consider internal equity to help ensure fair and consistent pay practices across our teams. Where applicable, this role may also be eligible for variable compensation (such as bonus or commission), equity, and benefits in accordance with local policies. Details will be shared during the hiring process. We are committed to equitable and transparent pay practices that align to market data, internal equity, and individual contribution. 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 are committed to creating an inclusive and accessible hiring experience for all candidates. If you require accommodations or adjustments at any stage of the recruitment process, please let us know and we will work with you to meet your needs. Learn more about the Commerce team, culture and benefits at https://www.commerce.com/careers/ Identity Verification To protect our candidates and company from fraudulent activity, our interview process includes a government ID and biometric verification via Persona, our trusted identity verification provider. All information is collected and processed securely in accordance with applicable privacy laws. 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.