Senior Full Stack Developer

TEKsystems; New York (NY); Remote; USD 120,000 - 160,000; Full time

Job summary

TEKsystems is seeking experienced Full Stack Developers for 100% remote positions across the United States. You will own both front-end and back-end development, with strong React experience and backend skills in Python/FastAPI or Node.js. You will design APIs, work with SQL databases, and deploy on AWS/Azure.

Collaboration with architects and engineers is essential in this enterprise environment. The role emphasizes architectural input, code quality, and participation in Agile processes, with

Qualifications

• U.S. Citizenship required.
• Strong React.js development experience.
• Backend development with Python/FastAPI or Node.js.
• Experience building full-stack web applications.
• Experience developing and consuming REST APIs.
• Experience working with SQL databases.
• Experience with AWS, Azure, or both.
• Strong understanding of software architecture and system design.
• Willingness to participate in a technical coding assessment.

Responsibilities

• Design, develop, and maintain enterprise-scale web applications.
• Build modern user interfaces using React.js.
• Develop backend services using Python/FastAPI or Node.js.
• Design and integrate REST APIs and microservices.
• Work with SQL databases and optimize application performance.
• Deploy and support applications in AWS and Azure cloud environments.
• Troubleshoot and resolve issues across front-end, backend, database, and cloud environments.
• Participate in architecture and system design discussions.
• Evaluate technical trade-offs and recommend scalable solutions.
• Write clean, maintainable, and testable code.
• Participate in Agile development processes and code reviews.
• Support CI/CD pipelines and engineering best practices.
• Collaborate with architects, engineers, and business stakeholders.

Skills

React.js

Backend development

Full-stack web apps

REST APIs

SQL databases

AWS/Azure

CI/CD

Tools

Docker

Kubernetes

GitHub Actions

Job description

• U.S. Citizenship required

Location: 100% Remote (United States)

U.s. Citizenship Required

This position supports programs within the aerospace and defense industry. U.S. Citizenship is a mandatory requirement for consideration. Candidates requiring sponsorship now or in the future cannot be considered.

Why This Opportunity?

Join one of the largest aerospace and defense technology organizations in the United States, supporting mission-critical software systems, enterprise modernization initiatives, cloud transformation efforts, and next-generation application development.

This organization continues to make significant investments across Full Stack Development, Cloud Engineering, Data Engineering, AI/ML, and modern software platforms. Their technology teams are expanding rapidly as they support critical engineering and business initiatives across the company.

This is a highly stable environment with long‑term projects, modern technology stacks, and opportunities to work alongside talented engineers on applications that have a meaningful impact. The organization has been aggressively hiring across software, cloud, and data teams, demonstrating a strong commitment to innovation and technology growth.

Unlike companies that separate front‑end and back‑end responsibilities, this team values true Full Stack Engineers who can own solutions end‑to‑end. Developers are expected to contribute to architecture, design, development, troubleshooting, and long‑term application support.

If you're looking for a place where you'll have technical ownership, growth opportunities, and exposure to large‑scale enterprise systems while working 100% remotely, this is an outstanding opportunity.

Position Overview

We are seeking experienced Full Stack Developers who are comfortable working across both front‑end and back‑end development.

This is a true full stack position. Candidates must have strong React experience along with backend development experience using either:

• React.js + Python/FastAPI
• React.js + Node.js

The hiring team is not looking for backend engineers with limited front‑end exposure. Candidates must be able to contribute across the entire application stack and confidently discuss the technologies they use on a daily basis.

Responsibilities

• Design, develop, and maintain enterprise‑scale web applications
• Build modern user interfaces using React.js
• Develop backend services using Python/FastAPI or Node.js
• Design and integrate REST APIs and microservices
• Work with SQL databases and optimize application performance
• Deploy and support applications in AWS and Azure cloud environments
• Troubleshoot and resolve issues across front‑end, backend, database, and cloud environments
• Participate in architecture and system design discussions
• Evaluate technical trade‑offs and recommend scalable solutions
• Write clean, maintainable, and testable code
• Participate in Agile development processes and code reviews
• Support CI/CD pipelines and engineering best practices
• Collaborate with architects, engineers, and business stakeholders

The role includes React.js front‑end development, Python and Node.js back‑end services, AWS and Azure cloud deployment, API integration, SQL database work, CI/CD support, architecture discussions, and work within a security‑conscious environment.

Required Qualifications

• U.S. Citizenship required
• Strong React.js development experience
• Strong backend development experience with:
  • Python and FastAPI, or
  • Node.js
• Experience building full‑stack web applications
• Experience developing and consuming REST APIs
• Experience working with SQL databases
• Experience with AWS, Azure, or both
• Strong understanding of software architecture and system design
• Ability to troubleshoot complex application performance issues
• Ability to explain technical decisions and engineering trade‑offs
• Strong communication and collaboration skills
• Willingness to participate in a technical coding assessment

Preferred Qualifications

• Docker
• Kubernetes
• GitHub Actions, Jenkins, or other CI/CD tools
• LLM experience
• Retrieval‑Augmented Generation (RAG)
• AI/ML application development