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UI Developer

Job

Promantis Inc

Phoenix, AZ (In Person)

Full-Time

Posted 1 week ago (Updated 1 week ago) • Actively hiring

Expires 7/15/2026

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Job Description

We are seeking a talented and driven UI Developer with a strong foundation in modern JavaScript frameworks and experience leveraging AWS cloud services to build scalable, high-performance web applications. In this role, you will bridge the gap between user experience design and cloud-native technical implementation. You will be responsible for crafting responsive, pixel-perfect user interfaces while ensuring seamless integration with our backend APIs and cloud infrastructure hosted on AWS.

Key Responsibilities UI Development:

Design, develop, and maintain responsive, high-performance, and accessible web applications using advanced JavaScript (ES6+) and modern frontend frameworks.

AWS Integration:

Collaborate with backend and DevOps teams to integrate frontend applications with AWS services (e.g., fetching data via API Gateway, handling authentication via Cognito, and utilizing S3/CloudFront for deployment).

Design-to-Code Translation:

Work closely with UI/UX designers to translate Figma/Sketch wireframes and prototypes into clean, semantic, and pixel-perfect code.

State & Performance Optimization:

Optimize application performance for maximum speed, scalability, and cross-browser compatibility. Manage complex client-side state efficiently.

CI/CD & Deployment:

Participate in configuring and maintaining automated frontend build and deployment pipelines within AWS.

Code Quality:

Write clean, modular, maintainable, and well-documented code. Conduct code reviews and write unit/integration tests to ensure stability.

Required Technical Skills Core Frontend:

Deep proficiency in JavaScript (ES6+), HTML5, and

CSS3/SASS.

Frameworks:

Hands-on experience with at least one major JavaScript framework/library (such as React.js, Angular, or Vue.js) and its ecosystem (e.g., Redux, Context API, Vuex).

AWS Cloud Ecosystem:

Direct experience working with or integrating frontend apps with AWS services: Amazon S3 & CloudFront (Static website hosting and CDN) AWS Cognito (User authentication and authorization) Amazon API Gateway & AWS Lambda (Consuming RESTful/GraphQL Serverless APIs) Optional but preferred: AWS Amplify or AWS SDK for JavaScript.

Build Tools & Version Control:

Experience with modern build tools/bundlers (Webpack, Vite, npm/yarn) and strict version control using Git.

Testing:

Familiarity with frontend testing frameworks like Jest, React Testing Library, or Cypress.