Software Development Engineer III (Storefront)

ABOUT QUINCE Quince is a destination for builders, creators, innovators, and operators who want to come together and challenge the status quo. Our mission is simple: make really high quality essentials for really low prices, fairly and sustainably. We deliver on that mission through a unique manufacturer-to-consumer (M2C) model eliminating the layers of traditional retail that add cost and result in consumers paying more than they need to. We find, build relationships with, and work directly with the manufacturing partners behind some of the world’s finest products. From there, our teams design smart, efficient operational processes  and build and deploy proprietary technology, AI, and analytics to help us scale fast. What began with a small assortment of elevated basics has quickly grown into a cross-category brand spanning apparel, accessories, home goods, and more. Today, tens of millions of people across a growing number of countries come – and return – to Quince because they trust us to deliver. OUR CULTURE Quince is a culture built for builders by builders. Our way of working starts with a blank sheet of paper. We question conventional thinking, use technology and data to uncover new opportunities, and move quickly to turn ideas into reality. We aren’t interested in replicating how others do retail. We’re building a better way – at a speed and scale unlike anything that’s been done before. We dream big and chase the hard problems others shy away from. Rejecting long-held assumptions is part of our company's DNA.  Where conventional wisdom says you have to choose – soft or durable, speed or rigor, quality or price – we ask why that trade-off has to exist in the first place. Our pace is fast and the bar is high because our customers expect a lot from us and we refuse to let them down. We believe the best results come from challenging ourselves, learning from one another, and building on each other's strengths.  Here, responsibility is not determined by role, tenure, or seniority. Every team member - no matter their level - has the opportunity to drive our business and shape our trajectory.  If you’re someone who likes to imagine new possibilities and build better systems rather than plug-in to outdated ones, Quince is the place for you. At Quince, you will be part of a high-performing team that is redefining what quality, value, and sustainability mean in modern retail. We are a destination for builders, innovators, and operators to come together and challenge the status quo. Our collective ambition is bold. We are creating an entirely new category and customer experience – one that democratizes luxury and provides high quality products at radically low prices. That mission demands a world-class team committed to excellence. If you are motivated by impact, growth, and purpose, you will find a strong sense of belonging at Quince. Roles & Responsibilities Design, develop, and maintain scalable, customer-facing storefront experiences across web (ReactJS) and mobile (React Native) applications. Lead development of complex features that power the customer-facing shopping experience including browsing, discovery, product pages, cart, and checkout flows. Architect performant frontend and mobile systems that support high traffic and large-scale ecommerce workloads. Collaborate with cross-functional teams including product, design, backend, and mobile engineering to define requirements and implement scalable solutions. Integrate with backend services and APIs, partnering closely with backend teams to define contracts and deliver reliable end-to-end experiences. Write clean, efficient, and well-documented code while setting a high engineering bar for quality, performance, and maintainability. Debug and resolve complex technical issues related to performance, scalability, and stability across web and mobile applications. Drive best practices in frontend and mobile architecture, component and design systems, testing strategies, and performance optimization. Participate in code reviews and provide constructive technical feedback to peers. Develop and maintain automated tests to ensure high-quality code and reliable releases across web and mobile. Stay up-to-date with emerging technologies and recommend tools and frameworks that improve the storefront platform. Mentor and guide engineers on the team while helping raise the technical bar across the organization. Experience Required Must Have: Bachelor’s or Master’s degree in Computer Science or a related field. 5–8 years of professional experience building modern web and/or mobile applications. Strong expertise in JavaScript/TypeScript and either ReactJS or React Native — most of our experiences are built on these frameworks. Experience building high-scale, consumer-facing web and mobile applications. Strong understanding of performance optimization techniques for frontend and mobile systems. Proficiency with HTML, CSS, and modern frontend fundamentals such as state management, component architecture, and responsive, accessible UI. Knowledge of web security principles and best practices. Proficiency with debugging tools such as React DevTools, Lighthouse, Chrome DevTools, or similar tools. Experience integrating with RESTful APIs and backend services. Strong problem-solving and analytical skills. Excellent communication and collaboration skills. Ability to work independently while leading technical initiatives within cross-functional teams. Nice to Have: Experience with server-side rendering frameworks such as NodeJS, Nest, ExpressJS, Next.js or equivalent. Familiarity with native Android (Kotlin/Java) and native iOS (Swift/Objective-C) development is expected, including how React Native bridges to and interoperates with native modules. Experience shipping and maintaining apps in the App Store and Google Play, including release, code-signing, and over-the-air upd