Senior Full Stack Developer (.NET + React)

San Diego, CA (Hybrid / Remote Flexibility)Build Data-Driven Applications. Contribute from Day One.A growing, San Diego-based company is seeking a hands-on Full Stack Developer with strong, production-level React experience to join their engineering team.This is not a ramp-up role.We are looking for someone who can step into an existing codebase and immediately contribute building features, solving problems, and helping elevate the technical bar across the team.What We're Really Looking ForWe're targeting engineers who:Understand why a solution works not just how to implement itCan break down ambiguous problems and work toward a solutionAre comfortable thinking out loud and collaborating in real timeBring curiosity and a desire to continuously improve technicallyCan contribute independently from Day 1What You'll Be DoingBuild and enhance features in a production React application (Next.js + TypeScript)Develop and maintain .NET 6+ backend services and APIsDesign and justify technical solutions, including trade-offs and scalability considerationsWrite clean, maintainable, well-tested codeDebug and resolve complex production issues using structured problem-solvingWrite and optimize SQL queries against large datasetsParticipate in code reviews and architectural discussionsCollaborate with engineers to raise the overall technical barRequired Qualifications (Read Carefully)3+ years of professional software development experienceStrong, hands-on React experience in a production environment(Not personal projects, bootcamps, or coursework)Experience with:React / Next.jsTypeScript / JavaScript (ES6+)Backend development with:C# / .NET 6+REST and/or GraphQL APIsStrong SQL skills (writing, tuning, optimizing queries)Ability to contribute to production code independently from Day 1Comfortable discussing real-world implementations, trade-offs, and debugging approachesThis Role Is NOT a Fit IfYour React experience is limited to personal or academic projectsYou are primarily backend-focused and looking to learn front-end on the jobYou struggle to reason through problems in real timeYou prefer being told exactly what to build vs. owning solutionsNice to HaveExperience with AWS (serverless, Lambda, state machines, etc.)Experience working on a SaaS platformFamiliarity with microservices or event-driven architecturesExposure to distributed systemsAWS Certifications (Associate or Professional)Experience with data-heavy or analytics-driven applicationsT ech StackFrontend: React, Next.js, TypeScriptBackend: C#, .NET 6+, REST/GraphQL APIsData: SQLCloud: AWSTools: GitHub, modern CI/CD pipelinesCompensation & BenefitsCompetitive salaryMedical, dental, and vision coverage401(k) with company matchFlexible Spending AccountsPaid time offWhat Success Looks LikeWithin your first 30 60 days, you will:Be actively contributing to React features in productionCollaborating on real deliverables with minimal ramp-upDemonstrating structured problem-solving and technical ownershipApply NowIf you're a React-first Full Stack Engineer who wants to make an immediate impact we'd love to connect.