Front End developer

Zigabyte Corporation-posted 5 days ago
Full-time • Mid Level
Montgomery, AL
11-50 employees
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We are seeking a skilled JavaScript/Front-End Developer to support a major modernization initiative transforming a 40-year-old mainframe application into a modern, cloud-based user interface. The developer will help convert 750 legacy screens into responsive, accessible UI compatible with modernization tools that interface with COBOL and a C#/.NET backend. The ideal candidate is an expert in modern JavaScript frameworks, understands how to collaborate within a time-boxed modernization schedule, and is comfortable working closely with UI/UX designers, backend engineers, and stakeholders.

  • Develop modern, responsive front-end components that replace legacy mainframe interfaces.
  • Translate UI/UX design artifacts (wireframes, prototypes, design system specs) into high-quality front-end code.
  • Implement reusable components aligned with the program’s design system and modernization tool constraints.
  • Ensure front-end code integrates cleanly with C#/.NET APIs and works within COBOL-interop modernization platforms.
  • Work with UI/UX and backend teams to estimate workload, define sprint objectives, and maintain an achievable modernization cadence.
  • Participate in PI Planning, Sprint Planning, Refinement, and Demos within an Agile SAFe environment.
  • Identify modernization challenges early and collaborate on solutions (performance, data handling, state management, rendering issues).
  • Conduct code reviews, ensure coding standards, and maintain version control across the modernization effort.
  • Optimize front-end performance for users transitioning from legacy terminal workflows.
  • Produce documentation for components, workflows, and integration patterns.
  • 5+ years of professional JavaScript/Front-End development experience.
  • Advanced proficiency with at least one modern framework: React, Angular, Vue, Svelte, or equivalent.
  • Strong experience with HTML5, CSS3, TypeScript, and component-driven UI architecture.
  • Demonstrated success modernizing or rebuilding legacy applications, especially those with large-scale screen counts.
  • Experience integrating front-end code with C#/.NET web APIs.
  • Ability to interpret complex workflows and map them to modular, maintainable UI components.
  • Experience working in Agile (Scrum or SAFe) teams, managing stories, estimates, and iterative releases.
  • Strong debugging skills across browsers, devices, and data integration layers.
  • Experience using Git or similar version control tools.
  • Experience modernizing mainframe, COBOL-driven, or character-based legacy applications.
  • Familiarity with cloud modernization patterns and API-first design.
  • Experience using or integrating with UI modernization tools that output COBOL- or C#-compatible artifacts.
  • Knowledge of DevSecOps workflows, CI/CD pipelines, automated testing, and artifact management.
  • Experience working with large design systems or helping build reusable UI libraries.
  • Understanding performance tuning for enterprise-scale front-end applications.
  • Experience in government, defense, or highly regulated environments.
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