About FullStack FullStack is the most transparent IT talent network, connecting highly skilled individuals with top integral companies and Silicon Valley startups for remote, on-demand projects. We focus on building a trusted, high-performance network where talent can thrive in a positive, respectful, and supportive environment. By prioritizing transparency, fair opportunities, and professional growth, we empower our engineers to deliver their best work while collaborating with innovative teams worldwide. - Offering life-changing opportunities for talented software professionals across the Americas. - Enhancing highly-skilled software development teams of hundreds of the world’s greatest companies. - Our 4.2-star rating on GlassDoor. - Our client Net Promoter Score of 68, twice the industry average. We’re Most Proud Of - Offering life-changing opportunities for talented software professionals across the Americas. - Enhancing highly-skilled software development teams of hundreds of the world’s greatest companies. - Our 4.2-star rating on GlassDoor. - Our client Net Promoter Score of 68, twice the industry average. The Opportunity Join our talent network and connect with U.S. clients for flexible, project-based development work as a Senior Full Stack Developer (React + Java). - You will integrate directly into our client's team and work alongside their existing designers and engineers on a daily basis. What We're Looking For - 5+ years of professional experience in software development. - Advanced English is required. - Successful completion of a four-year college degree is required. - Proven experience building modern frontend applications using ReactJS. - Hands‑on experience working with Java for backend development and API design. - Solid background in database design, querying, and data management. - Demonstrated experience working on code migration or modernization projects (e.g., JSP to ReactJS). - Practical experience using AI‑assi