Sr Software Engineer (React,Node)

Job Title: Sr Software Engineer (Node, React)Job Type: Permanent Full TimeLocation: St Louis, Missouri, United StatesDescription: Sr Software Engineer (Node, React)Position Description Systemone is looking for a talented and experienced Full Stack Developer who enjoys building modern, high-impact web applications end-to-end. In this role you’ll work across the stack using React, Node.js, Next.js, NestJS and Postgres to deliver scalable, performant products that directly impact users. You'll have a strong voice in technical decisions, collaborate closely with product and design, and help shape both architecture and engineering culture. If you like ownership, solving real-world problems, and working with a pragmatic, modern tech stack—this is a great fit. This position requires someone who is local to St. Louis, MO and willing to work on-site three days per week.Your future duties and responsibilities • Design, build, and maintain full-stack applications using React, Next.js, Node.js, NestJS, and Postgres • Develop scalable APIs and backend services • Collaborate with product managers and designers to translate requirements into technical solutions • Write clean, maintainable, and well-tested code • Optimize applications for performance, scalability, and reliability • Participate in code reviews and mentor junior engineers • Contribute to architectural decisions and technical strategy • Troubleshoot, debug, and improve existing systemsRequired qualifications to be successful in this role • 5+ years professional experience software engineer experience • Must have strong experience in: • React (modern hooks, state management) • Node.js (API development, backend architecture) • Next.js (SSR/SSG, routing, performance optimization) • Postgres (data modeling, query optimization) • Experience building and deploying production-grade web applications in a cloud environment (AWS strong preferred) • Solid understanding of RESTful APIs and web architecture • Familiarity with version control (Git) and CI/CD workflows • Strong problem-solving and debugging skills • Strong full-stack engineering mindset • Ability to own features from concept to production • Clear and effective communication • Collaboration across cross-functional teams • Attention to detail and code quality • Problem-solving and analytical thinking  Ref: #404-IT Pittsburgh