Front-End Developer

E-Infosol LLC

$110K — $130K *
Information Technology
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • Active Top-Secret Security Clearance
  • Bachelor's degree in IT, Computer Science, Engineering, Business, or a related field
  • 8+ years developing modern frontend applications with React, JavaScript, TypeScript, and Node.js
  • Advanced experience with HTML, CSS, Sass, and responsive design
  • Strong experience integrating with REST APIs and handling JSON and XML
  • Proficiency in Git and GitLab for version control
  • Ability to design and maintain scalable frontend architectures in cloud environments

Responsibilities

  • Lead the design and development of responsive user interfaces with Node.js, React, JavaScript, TypeScript
  • Architect maintainable UI component libraries following modern engineering standards
  • Mentor mid-level and junior developers, providing guidance on coding best practices
  • Integrate frontend applications with backend .NET services using REST APIs
  • Drive performance tuning for enterprise-grade applications
  • Collaborate with designers, engineers, and product owners for seamless functionality
  • Establish and enforce coding standards and quality controls across the codebase

Benefits

  • 100% company-paid medical premiums for employees with dependent options
  • Dental and vision coverage
  • Retirement Savings (401k) with up to 4% match
  • Health Savings Account (HSA), FSA and DCFSA
  • Company-paid short/long-term disability
  • Company-paid life and AD&D insurance
  • Generous paid time off and all federal holidays
  • Legal and identity protection services
  • Bonuses for certifications and reimbursement
  • Employee perks including UberOne, company outings, and service discounts
Full Job Description
PID: 26-14-09P-043-WSU

E-INFOSOL LLC is seeking a highly motivated Front-End Developer to join our innovative, customer-focused team in Washington, DC.

Summary

The Front-End Developer will play a pivotal role in architecting, building, and optimizing modern user interfaces that support mission-critical applications and lead the development of scalable, high-performance front-end solutions using React, TypeScript, JavaScript, Node.js, and AWS-hosted environments, ensuring seamless integration with .NET back-end services. In this role, they will mentor mid-level developers, set engineering standards, and champion best practices in code quality, accessibility, and performance and collaborate closely with designers, back-end engineers, product owners, and mission stakeholders to deliver intuitive, secure, and reliable user experiences that meet evolving customer and program needs. Drawing on deep technical expertise and strong problem-solving skills, they will help guide architectural decisions, drive continuous improvement, and ensure front-end components operate effectively within enterprise-grade systems.

Key Responsibilities

  • Lead the design and development of responsive, high-performance user interfaces using Node.js, React, JavaScript, TypeScript, HTML, and CSS
  • Architect modular, maintainable, and scalable UI component libraries aligned with modern engineering standards
  • Mentor and provide technical guidance to mid level and junior frontend developers, including reviewing code, coaching on best practices, and supporting skill development
  • Integrate frontend applications with backend .NET services using REST APIs, JSON, and XML
  • Drive client-side state management patterns, rendering optimization, and performance tuning for enterprise-grade applications
  • Collaborate closely with UX/UI designers, backend engineers, and product owners to ensure seamless end-to-end functionality
  • Establish and enforce coding standards, accessibility guidelines, and quality controls across the frontend codebase
  • Use Git and GitLab for version control, branching strategies, and merge request workflows
  • Troubleshoot complex UI issues across environments, platforms, and browsers, providing root-cause analysis and actionable remediation
  • Operate within AWS cloud-hosted environments and support integration, deployments, and environment troubleshooting
  • Promote a culture of high-quality engineering through code reviews, design reviews, and knowledge-sharing sessions
  • Support planning, estimation, and architectural discussions for new features and modernization efforts
  • Partner with teams to ensure frontend solutions meet accessibility, security, and performance requirements
  • Review code and container scans and remediate both code and package vulnerabilities on a regular basis


Qualification

  • Active Top-Secret Security Clearance
  • Bachelor's degree in Information Technology, Computer Science, Engineering, Business, or a related field.
  • Minimum 8+ years of experience developing modern frontend applications using React, JavaScript, TypeScript, and Node.js
  • Advanced experience building UI components with HTML, CSS, Sass, and responsive design frameworks
  • Strong experience integrating with REST APIs and working with JSON and XML data formats
  • Proficiency with Git and GitLab for source control, collaboration, and code review workflows
  • Ability to design, refactor, and maintain scalable frontend architectures in cloud environments (AWS preferred)
  • Deep understanding of frontend performance optimization, browser behavior, debugging techniques, and application profiling
  • Demonstrated ability to mentor developers and lead best-practice discussions across the engineering team
  • Experience building cloud-native solutions in AWS
  • Experience with YAML and CI/CD pipeline development (GitLab CI preferred)
  • Experience with package scan vulnerability remediation
  • Experience with integration with .NET APIs or full stack environments
  • Excellent communication skills with the ability to articulate technical decisions and collaborate with cross-functional teams


Bonus Points if you have:

  • Experience with automated UI testing frameworks (Jest, React Testing Library, Cypress)
  • Familiarity with accessibility standards (Section 508, WCAG)
  • Familiarity with JFrog Artifactory
  • Familiarity with Jira for DevOps


Benefits
  • Medical - 100% company paid premiums for employees with dependent options.
  • Dental and Vision
  • Retirement Savings (401k) up to 4% match
  • Health Savings Account (HSA), FSA and DCFSA
  • Company-paid Short/Long-term disability (w/ additional supplemental options)
  • Company-paid Life and AD&D (w/ additional supplemental options)
  • Generous Paid Time Off and ALL 11 Federal Holidays
  • Legal and Identity Protection Services
  • Bonuses for certifications and reimbursement

Employee Perks:
  • UberOne, Company Outings (Sporting events, Happy Hours, etc.), Discounts on services including Pet Insurance


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