About the role

Role Overview

As a Senior Frontend Developer, you will design, develop, and unit test UI interfaces for a browser-based application that integrates with backend microservice APIs.

Responsibilities

Design, develop, and unit test React UI interfaces
Collaborate with the Lead Architect and other developers on system architecture, design, and integration
Participate in the full software life cycle: requirements → implementation → testing
Work with users in an Agile environment to understand requirements and refine solutions
Provide application support during testing and production, deploying code fixes as needed

Requirements

BS in Computer Science or Engineering
5+ years of software development experience
5+ years of React development experience
Strong skills in:
- React
- TypeScript/JavaScript
- MVC/MVVM design patterns
- JSON, HTML4/5, CSS/SCSS
Testing proficiency with Jest, Enzyme, and React Testing Library
Strong understanding of browser-based debugging tools and methodologies
Experience interfacing with complex backend APIs

Nice-to-haves

Experience in environments supporting federal government / enterprise systems (implied by context)

About Haystack

Haystack is a technology integrator providing full life cycle services and solutions across technical, engineering, intelligence, and enterprise information technology markets. The work supports U.S. federal government needs, including development and integration in complex software environments.