Senior Full-Stack Engineer: Cloud & Federal Systems

i3, LLC; Huntsville (AL); On-site; USD 110,000 - 170,000; Full time

Job summary

i3, LLC is seeking a Senior Full Stack Engineer to lead design, development, and modernization of enterprise applications across the full stack—from front-end to back-end, APIs, databases, and cloud environments. The role requires collaboration with Product, DevSecOps, Cloud, Data, QA, and Migration teams to deliver secure, scalable solutions for a major federal transformation program.

The Senior Engineer will design and build REST APIs and microservices, ensure code quality and performance, and

Qualifications

• Requires 8+ years of software engineering or full-stack development experience.
• Bachelor's degree in a related field.

Responsibilities

• Design, develop, and maintain front-end and back-end components for enterprise applications.
• Build and optimize REST APIs, microservices, and system-to-system integrations.
• Collaborate across Scrum Masters, Product Leads, QA Automation Engineers, Cloud Engineers, and Data Engineers.
• Mentor mid-level engineers and support knowledge-sharing across teams.
• Ensure secure coding practices, performance tuning, and compliance with federal standards.

Skills

Full-stack development

REST APIs

Cloud environments

Security compliance

Education

Bachelor's degree

Tools

Docker

Kubernetes

Git

CI/CD

Job description

i3, LLC is seeking a Senior Full Stack Engineer to lead design, development, and modernization of enterprise applications across the full stack—from front-end to back-end, APIs, databases, and cloud environments. The role requires collaboration with Product, DevSecOps, Cloud, Data, QA, and Migration teams to deliver secure, scalable solutions for a major federal transformation program.

The Senior Engineer will design and build REST APIs and microservices, ensure code quality and performance, and