New

Senior Full Stack Engineer

22nd Century Technologies, Inc.
Payrate: $50/hr. to $65/hr. W2
United States, Washington, Seattle
Jan 15, 2026
Title: Senior Full Stack Engineer Location: Seattle, WA 98101 Duration: 6+ months (Contract to perm) Payrate: $50/hr. to $65/hr. on W2 without benefits Shift: 8 am to 5pm Mon to Thurs Onsite, Fri Remote Notes: MacBook needed. Bachelor's Degree Required. Job Description: We are seeking a highly skilled Senior Full Stack Engineer to design, develop, and deliver secure, scalable web applications. This role requires expertise in React, JavaScript, Java or Node.js, and cloud-native application development. The ideal candidate thrives in collaborative environments and enjoys end-to-end ownership of projects. Role & Responsibilities: Build and maintain full-stack applications with modern technologies. Develop reusable UI components using React. Create and integrate backend services and REST APIs. Ensure application performance, security, and scalability. Mentor junior engineers and review code. Required Skills: 5-8 years of full-stack experience. Strong skills in React, JavaScript (ES6+), HTML, CSS. Backend experience with Java (Spring Boot) or Node.js. Knowledge of REST APIs, microservices, and relational/NoSQL databases. Experience with Git, CI/CD, and cloud-native development. Preferred: TypeScript, Next.js, AWS, Docker/Kubernetes, event-driven systems Experience in retail, POS, or enterprise systems