Company Name: B-Stock

Job Details: Hiring,Remotely,in,USA,Remote,145K-175K,Annually,Senior,level

Job Url: https://builtin.com/job/senior-frontend-engineer-react-next-js/8334152

Job Description: JOB SUMMARYWe're seeking an experienced Senior Frontend Engineer to lead the technical direction of B-Stock's marketplace experience. In this role, you'll architect and implement complex features within our Next.js-based applications, serving as the technical voice in cross-functional discussions and a trusted advisor on high-stakes initiatives. You'll balance strategic thinking with hands-on coding, mentor engineers, and serve as a bridge between technical and business stakeholders.This position requires a senior technologist who can navigate ambiguity, make sound architectural decisions under pressure, and advocate for both end-user experience and engineering excellence. You'll work on the company's most critical and visible projects, often in high-pressure situations requiring both technical depth and strong communication skills. This is a leadership-oriented individual contributor role for someone ready to operate at the highest levels of technical contribution.ESSENTIAL JOB DUTIES AND RESPONSIBILITIESTechnical Leadership & ArchitectureLead architectural design and implementation of complex features in our Next.js/React customer-facing applicationsMake critical technical decisions balancing user experience, developer experience, scalability, and business requirementsDrive technical strategy for frontend architecture, including state management, performance optimization, and build toolingEvaluate and introduce new technologies and patterns to improve development velocity and product qualityOwn end-to-end delivery of high-complexity, high-visibility features from concept through productionEstablish and enforce frontend engineering best practices, code quality standards, and testing strategiesStakeholder Collaboration & CommunicationParticipate in technical discussions with non-technical stakeholders, translating business requirements into technical solutionsRepresent engineering perspective in product planning, advocating for technical sustainability and user experienceCollaborate with engineering leadership on strategic initiatives, technical roadmaps, and critical decision-makingPartner with UX designers to influence design direction based on technical constraints and opportunitiesCommunicate technical complexity and tradeoffs clearly to diverse audiences including product, design, and leadershipMentorship & Team DevelopmentMentor mid-level and senior engineers through code review, pairing, and technical guidanceElevate team capabilities by sharing knowledge on modern frontend patterns, Next.js ecosystem, and performance optimizationFoster a culture of engineering excellence, continuous improvement, and collaborative problem-solvingGuide engineers through complex technical challenges and help them grow their architectural thinkingHands-On EngineeringWrite production-quality TypeScript/React code for our customer-facing applicationsImplement sophisticated UI interactions, real-time bidding interfaces, and responsive layoutsOptimize application performance including bundle size, Core Web Vitals, and runtime efficiencyDebug and resolve complex issues spanning frontend, API integration, and full-stack concernsConduct thorough code reviews ensuring quality, maintainability, and knowledge transferBuild with accessibility, security, and scalability as foundational requirementsCross-Cutting Technical ConcernsIntegrate monitoring, logging, and observability tools (Datadog) for production debuggingManage feature flag strategies using LaunchDarkly for safe, incremental rolloutsEnsure cross-browser compatibility and responsive design across devicesImplement comprehensive testing strategies using Jest, Vitest, React Testing Library, and PlaywrightDesign and implement authentication/authorization flows with multiple identity providers (OAuth2, FusionAuth, Salesforce, JWTs)MINIMUM QUALIFICATIONS, JOB SKILLS, ABILITIESEDUCATION:Bachelor's degree in Computer Science or equivalent experienceEXPERIENCE:10+ years of professional software engineering experience7+ years focused on frontend development5+ years of production experience with React and modern frontend frameworks3+ years working with Next.js or similar SSR/hybrid rendering frameworksProven track record architecting and delivering large-scale, customer-facing SaaS applicationsExperience leading technical initiatives and mentoring engineers at various levelsDemonstrated ability to drive projects from ambiguous requirements to successful production launchExperience working on high-pressure, high-visibility projects with executive stakeholder involvementTECHNICAL SKILLS:Expert-level proficiency in TypeScript, React 18+, and Next.js 15+ (App Router and Pages Router)Deep understanding of modern frontend architecture including state management (TanStack Query, Context API)Strong knowledge of CSS-in-JS solutions (styled-components) and responsive design patternsProficiency with frontend tooling: Webpack, Vite, Babel, ESLint, PrettierExperience with testing frameworks: Jest, Vitest, React Testing Library, PlaywrightStrong understanding of web performance optimization and Core Web VitalsFamiliarity with backend technologies and API design (RESTful, GraphQL)Experience with CI/CD pipelines and containerized deployments (Docker, Kubernetes)Git workflow expertise including pull request reviews and collaborative developmentPREFERRED QUALIFICATIONSExperience with microservices architecture and event-driven systemsKnowledge of feature flag management and experimentation platformsFamiliarity with monitoring and observability tools (Datadog, Sentry)Experience with design systems and component library developmentUnderstanding of e-commerce, marketplace, or auction platformsExposure to MongoDB, RabbitMQ, or similar backend technologiesThe pay rate for this role will range between $145,000 to $175,000, per annum. We consider many factors when determining salary offers, such as the applicant’s work experience, education and training, skills, market data, and internal equity.EMPLOYEE BENEFITSCompetitive compensation packages including bonus and optionsMedical, dental, and vision benefitsMatching 401(K)Paid time offTelecommuting and remote-work optionsSupport for continuing educationTeam off-sites, social events, annual company events, and frequent extracurricular activitiesUnlimited snacks and drinks THE COMPANYB-Stock is the world's largest B2B re-commerce platform, connecting sellers and buyers of returned, trade-in, and overstock inventory. Our customers range from today’s top brands and retailers that want best-in-class inventory resale management to tens of thousands of entrepreneurs looking to purchase valuable merchandise for their resale businesses.While the amount of returned and overstock inventory continues to grow, there is also growing pressure on retailers and consumers to adopt a more circular economy and keep products in use as long as possible. Accordingly, the need for re-commerce solutions - to find products a second life - has never been greater! At B-Stock we’re proud to play a large part in powering resale, reuse, and the circular economy through our platform: annually we sell over 130 million items across all categories and conditions, equating to 400 million pounds of inventory. We believe there is tremendous value in and demand for this inventory - no matter the category, condition, or location. With hundreds of thousands transactions completed annually, B-Stock gives buyers a simple and direct way to buy valuable products directly from retailers and offers sellers a technology-driven replacement for traditional resale methods, while boosting operational efficiency, recovery rates, and cycle time.Led by eBay veterans and backed by top investors including Spectrum Equity, True Ventures, and Susquehanna Growth Equity, B-Stock shows no signs of slowing down. Our core values have shaped the company we are today and will continue to drive our success for many years to come.For more information, visit bstock.com/careers/OUR VALUESMake Each Dollar Count Whether it’s the recovery amount or a buyer’s budget, money matters to all of our clients. And because each dollar matters to them, it matters to us.  Take Our Work Seriously, Not OurselvesEverything at B-Stock continues to grow - everything but our egos, that is. We’re not afraid to let loose and laugh (often at ourselves). Do The Hard Things Today That Will Pay Off TomorrowWe’re willing to sacrifice and endure, fail and adapt to reach our long-term goals. Use Trust As The Best Measure Of SuccessThe trust we earn along the way is more valuable than money. Without trust from both our buyers and sellers, our business won’t succeed.Find Strength In NumbersUse our passion for data to provide value to our customers, improve ourselves, and develop new ways to delight our buyers and sellers.No applicant will face discrimination/harassment based on race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on “protected categories,” B-Stock also strives to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at B-Stock.Work Authorization required.