Sr. Software Engineer (Fullstack)

Senior Fullstack Software EngineerLocation - San Francisco, CA - (On-site, 5 Days Per Week)Compensation - $200,000 – $400,000 Base + Competitive EquityVisa - Visa Sponsorship Available - (H-1B Transfers Supported)Company Stage - High-Growth Series A Startup ($14M+ Raised)Industry - Consumer Technology, Mobile Applications, Web Platforms, Gaming, Marketplace, FinTech Infrastructure, SoftwareAbout the CompanyThe company is building the next generation of consumer technology products by creating highly engaging digital experiences across mobile and web platforms.Its flagship products are redefining how consumers interact with digital collectibles, gaming experiences, and community-driven applications. With millions of users, strong product-market fit, and rapid growth, the company is expanding its engineering team to build scalable web platforms and infrastructure that support future product expansion.Backed by leading investors including General Catalyst and DraftKings Drive Fund, the company has raised over $14M while achieving significant growth and building some of the fastest-growing applications in its category.As a Senior Fullstack Software Engineer, you'll own the foundation of the company's web platform, build consumer-facing experiences from 0?1, establish frontend engineering standards, and collaborate closely with product and backend teams to deliver world-class user experiences.This is a rare opportunity to join a small, high-impact engineering team where you'll have significant ownership over architecture decisions, influence product direction, and help define the future of consumer web and mobile experiences.What You'll DoBuild and own consumer-facing web applications from concept through productionEstablish the foundation and technical standards for the company's web platformDevelop highly polished user experiences using React and TypeScriptBuild scalable frontend architecture supporting future web and mobile expansionCreate responsive, high-performance interfaces with thoughtful animations and micro-interactionsPartner closely with backend engineers to design APIs, data models, and application architectureBuild internal tools and dashboards that improve operational efficiency and decision-makingOwn frontend engineering best practices, standards, and development workflowsTranslate product ideas and designs into pixel-perfect production experiencesImprove application performance, reliability, and user experience qualityContribute to technical decisions across frontend, backend integrations, and product infrastructureWork closely with Product, Design, and Engineering teams to ship high-impact consumer featuresIdeal Candidate BackgroundExperience Requirements5+ years of fullstack software engineering experienceStrong experience building consumer-facing web applicationsExperience shipping 0?1 products at fast-growing startupsExperience owning major frontend platforms, systems, or product initiativesExperience building highly polished user-facing applicationsExperience working in high-agency, ambiguous startup environmentsDemonstrated ownership of products or features from concept through launchStrong product intuition with a focus on user experience and business impactTechnical RequirementsDeep expertise in React and TypeScriptStrong understanding of modern frontend architecture, patterns, hooks, and performance optimizationExperience building complex consumer web applicationsExperience implementing polished UI with animations, interactions, and responsive designStrong JavaScript fundamentals and modern frontend development practicesExperience partnering with backend engineers on API design and data modelingExperience building scalable frontend platforms and component systemsExperience with application performance optimization and frontend reliabilityExperience working with modern web development tooling and infrastructureAbility to understand product requirements and translate them into high-quality technical solutionsEducationNo specific degree requirementStrong technical background and demonstrated engineering ability preferredSoft SkillsStrong communication skillsHigh ownership mentalityExcellent collaboration across Engineering, Product, and Design teamsComfortable operating in ambiguitySelf-directed and proactiveStrong product senseCustomer-focused mindsetStrong attention to detailHigh execution velocityAbility to independently prioritize and drive projects forwardCompensation & BenefitsBase Salary: $200,000 – $400,000Competitive Equity PackageFully On-site Environment (San Francisco, CA)Visa Sponsorship Available (Transfers Supported)Significant ownership over consumer web platform developmentOpportunity to build products used by millions of usersHigh-impact Senior Fullstack Engineering roleDirect collaboration with engineering and product leadershipOpportunity to define frontend architecture and engineering standardsExposure to consumer applications, gaming, and emerging technology productsRapid career growth opportunitiesHigh-performance, craft-focused engineering cultureWhy JoinThis is an opportunity to build the web foundation behind one of the fastest-growing consumer applications in the market.You'll create polished consumer experiences, establish frontend architecture, build internal platforms, and collaborate with product and engineering teams solving challenging problems around scale, performance, and user engagement.As a Senior Fullstack Software Engineer, you'll have broad ownership over critical product initiatives while helping define the next generation of consumer web and mobile experiences.