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GoldenFlash LLC is seeking an experienced Senior Full-Stack Engineer to own complex features and contribute across frontend and backend development. The role involves designing, building, testing, deploying, and maintaining production applications and client projects while collaborating with distributed teams and stakeholders. Responsibilities Design, build, and maintain scalable web applications and backend servicesDevelop modern frontend applications using React, TypeScript, and related technologiesBuild and maintain backend APIs and services using Node.js, Python, or comparable technologiesDesign and work with relational databases such as PostgreSQLDevelop and integrate REST APIs and third-party servicesParticipate in application architecture and technical planningTranslate product and business requirements into practical technical solutionsWrite clean, maintainable, and well-tested production codeReview pull requests and provide constructive technical feedbackDebug complex production issues and implement long-term solutionsImprove application performance, reliability, security, and maintainabilityWork with cloud platforms and production deployment environmentsContribute to CI/CD pipelines and development workflowsCollaborate with product managers, designers, engineers, clients, and company leadershipHelp establish engineering standards and development best practicesMentor junior and mid-level engineers when neededCommunicate technical decisions clearly to both technical and non-technical stakeholders Qualification Because this is a U.S.-based remote position, applicants must currently reside in the United States5+ years of professional software engineering experience, including significant full-stack development experienceStrong professional experience with React and modern frontend developmentStrong experience with TypeScript and JavaScriptProfessional backend development experience with Node.js, Python, or comparable technologiesGood understanding of REST API design and backend architectureProfessional experience with PostgreSQL, SQL, or other relational databasesExperience designing, building, and maintaining production web applicationsGood understanding of application architecture, scalability, performance, security, and maintainabilityExperience with Git-based development workflows and code reviewsExperience with automated testing and software quality practicesExperience with cloud platforms such as AWS, Azure, or Google CloudExperience with Docker, CI/CD pipelines, and modern deployment workflowsAbility to independently investigate and solve complex technical problemsGood written and spoken English communication skillsAbility to communicate clearly and collaborate effectively in a remote environment