Senior Full Stack Developer (8+ Years Experience) – Long-Term Remote Opportunity (US Client)

About the Role We are hiring a Senior Full Stack Developer for a long-term remote opportunity with one of our clients based in Texas, USA. We are looking for a highly experienced developer with a minimum of 8 years of professional Full Stack development experience who can build, maintain, and scale modern web applications. The ideal candidate should be comfortable working independently, writing clean and efficient code, and collaborating with a remote team. This is a long-term opportunity for someone who takes ownership of projects and consistently delivers high-quality work. Responsibilities Design, develop, and maintain scalable web applications Build responsive and user-friendly frontend interfaces Develop secure backend services and REST APIs Integrate third-party APIs and payment gateways Design and optimize databases Write clean, maintainable, and well-documented code Troubleshoot, debug, and resolve production issues Optimize application performance and security Participate in code reviews and technical discussions Collaborate effectively with project managers, designers, and stakeholders Required Skills Frontend React.js Next.js TypeScript JavaScript (ES6+) HTML5 CSS3 Tailwind CSS Backend Node.js Express.js REST APIs Database MongoDB PostgreSQL MySQL Cloud & DevOps AWS Docker Git & GitHub CI/CD Requirements Minimum 8 years of professional Full Stack Development experience Strong expertise in React.js, Next.js, Node.js, and TypeScript Experience building production-grade web applications Excellent understanding of API development and integrations Strong knowledge of database design and optimization Experience with Git and collaborative development workflows Excellent debugging and problem-solving skills Strong communication skills in English Ability to work independently with minimal supervision Availability to overlap at least a few hours with the US time zone Nice to Have SaaS product development AI/OpenAI API integrations GraphQL Redis Microservices architecture Kubernetes Serverless applications Stripe or other payment gateway integrations What We're Looking For We're looking for someone who is: Reliable and professional Detail-oriented Self-motivated Proactive in solving problems Committed to delivering high-quality work Comfortable working with remote teams How to Apply To help us evaluate your application, please include the following in your Upwork proposal: Your updated resume (PDF) Portfolio, GitHub Links to 2–3 recent Full Stack projects A brief summary of your experience with React, Next.js, Node.js, TypeScript, and AWS Your hourly rate Your availability (hours per week) Your time zone Your earliest possible start date Bonus: If you've built SaaS platforms, AI-powered applications, CRM systems, enterprise software, marketplaces, or other large-scale web applications, please mention them in your proposal. Important: Please submit all requested information directly through your Upwork proposal. Shortlisted candidates will be contacted through Upwork for the interview process.