Sr Full stack UI Engineer (React/TypeScript + C#/.NET Core + Blazor + REST APIs) | Sacramento, CA – Onsite

Job Title: Full Stack Engineer (UI Engineer)

Location: Sacramento, CA (Onsite)

Contract:C2C

Primary focus:

Design and implement secure, accessible, and business-friendly full-stack applications using Blazor, .NET Core, and REST APIs, supporting delegated administration and approved business workflows.

Design and implement an accessible, business-friendly portal experience for delegated Amazon Connect administration.

Key responsibilities

Design and implement the React and TypeScript user interface for all approved BOP capabilities.

Create role-based navigation, guided forms, search, filtering, selection, confirmations, status, and audit-history experiences.

Translate technical Amazon Connect concepts into clear business language and safe administration workflows.

Implement client-side validation, impact warnings, safe defaults, before and after summaries, and clear outcome messages.

Integrate frontend components with authenticated BOP backend APIs without exposing privileged credentials or operations.

Implement applicable EDD accessibility, responsive-design, browser-compatibility, usability, and design-system requirements.

Create component, interaction, end-to-end, accessibility, error-state, and regression tests.

Participate in user reviews, demonstrations, defect resolution, documentation, and iterative improvement.

Minimum qualifications

Five or more years of modern web application development experience.

Strong React, TypeScript, HTML, CSS, and frontend architecture skills.

Experience building role-based enterprise applications with complex forms, validation, workflows, and API integration.

Knowledge of accessible web application practices, including WCAG-aligned design and keyboard and screen-reader considerations.

Experience with frontend automated testing, secure session handling, safe error presentation, and performance optimization.

Ability to collaborate with business users and convert operational requirements into clear and usable experiences.