Senior Frontend Web Engineer — Mission-Critical & Secure

Four Sea Group; Littleton (CO); On-site; USD 134,000 - 181,000; Full time

Job summary

Four Sea Group, Inc. is seeking a Software Engineer specializing in front-end web development to build accessible, reliable, user-centered applications supporting secure customer missions.

The role translates complex mission requirements into effective digital experiences, delivering frontend features independently, and collaborating with backend, systems, and test teams in an Agile environment.

Qualifications

• Bachelor's degree in CS/Software Engineering/related field or equivalent experience.
• Typically four or more years of frontend software development experience.
• Active Top Secret clearance at hire with ability to obtain TS/SCI CI Poly.
• Experience delivering user-facing web apps with modern frontend tools.
• Experience HTML5/CSS3, responsive design, and accessibility standards.
• Experience with Angular or React and consuming RESTful APIs.
• Experience with Git platforms and Agile software delivery.
• Knowledge of open-source solutions and secure development practices.

Responsibilities

• Translate mission and user requirements into accessible frontend features.
• Independently develop frontend capabilities and integrate with backend services.
• Support routine software delivery in an Agile environment.
• Collaborate across software, systems, and test teams and apply modern development practices.
• Deliver usable, maintainable software aligned with customer needs.

Skills

Frontend web development

HTML5

CSS3

Angular

React

RESTful APIs

Git / GitHub / GitLab

Agile / Lean

Section 508 accessibility

Clearance TS/SCI with CI Poly

Strong communication

Education

Bachelor's degree in Computer Science / Software Engineering / Computer Engineering or related field

Tools

HTML5

CSS3

LESS

SASS

Bootstrap

Bourbon

Git

GitHub / GitLab

Angular

React

Rails / Express / Django

Docker

Kubernetes

Jenkins

Job description

Four Sea Group, Inc. is seeking a Software Engineer specializing in front-end web development to build accessible, reliable, user-centered applications supporting secure customer missions.

The role translates complex mission requirements into effective digital experiences, delivering frontend features independently, and collaborating with backend, systems, and test teams in an Agile environment.