UX/UI Developer

Mobomo, LLC; Washington (District of Columbia); On-site; USD 110,000 - 170,000; Full time

Benefits offered by this job

Health care

Paid time off

Retirement savings

Professional development

Job summary

Mobomo, LLC is seeking a frontend engineer who bridges complex user flows with high-performance micro-frontend (MFE) architecture. You will own the front-end lifecycle from prototype to deployment, taking initiative in shifting environments and coordinating with stakeholders.

Responsibilities include designing and prototyping UI, implementing React components, and managing state with Redux or Context API. You’ll optimize performance, write tests, and help build a unified design system across

Qualifications

• Extensive React frontend development experience
• Strong understanding of user-centered design and responsive UI
• Experience with micro-frontend architectures (single-spa)
• Ability to deploy features independently via CI/CD pipelines
• Proficiency in state management (Redux/Context API) and modern tooling
• Familiarity with automated testing (Jest, RTL)
• US citizen and able to obtain US Government Public Trust clearance

Responsibilities

• Design user flows, wireframes, and high-fidelity prototypes with stakeholders
• Develop reusable UI components and libraries in React.js
• Ensure responsive design across devices
• Oversee complex data flows with modern state management
• Monitor performance, debug issues, and maintain tests (Jest, RTL)
• Lead shared design system development for consistent visuals

Skills

React

JSX & hooks

State management

MFE architecture

Single-spa

Performance optimization

Testing

CI/CD

Design systems

Tools

Redux

Context API

Jest

React Testing Library

GitHub Actions

AWS (S3/CloudFront)

CodePipeline

Job description

This role is for someone who can bridge the gap between complex user flows and high-performance micro-frontend (MFE) architectures. If you take initiative, thrive in shifting environments, and want to own the front-end lifecycle from prototype to deployment, you’ve found your team.

The Mission (Core Responsibilities)

Design & Prototyping:

Collaborate with stakeholders to create user flows, wireframes, and high-fidelity interactive prototypes. You must be comfortable mocking up wireframes in Figma or directly within React to ensure rapid iteration.

React Implementation:

Develop reusable, modern UI components and front-end libraries using React.js to build scalable, high-performance web applications.

Responsive Design:

Ensure every application is optimized for a seamless, accessible experience across mobile, tablet, and desktop devices.

State & Data Management:

Oversee complex data flow and storage using modern state management libraries such as Redux or the Context API.

Performance & Testing:

Monitor front-end performance, debug intricate issues, and maintain rigorous unit and integration tests using tools like Jest and React Testing Library.

Technical Expertise

React Proficiency:

Expert-level knowledge of JSX, hooks, Virtual DOM, and component lifecycles.

UI/UX Design Fundamentals:

A solid understanding of user-centered design principles, typography, and color theory.

Micro-Frontend (MFE) Architecture:

Experience designing and maintaining multiple micro-frontend services using single-spa.

Independent Deployment:

Mastery of independent CI/CD pipelines, allowing individual features (e.g., checkout, profile, search) to be deployed without redeploying the entire platform.

Shared Design Systems:

Lead the development of a global theme to maintain visual consistency across all decoupled MFEs.

System Optimization:

Expertise in lazy loading, import maps for version control, and managing shared dependencies to prevent duplicate library downloads.

The Bonus Stack (Preferred Backend & Cloud)

Node.js Development:

Experience building scalable server-side applications and RESTful/GraphQL APIs using Node.js and Express.

AWS Infrastructure:

Familiarity with AWS services such as S3 and CloudFront (for MFE hosting), Lambda (serverless functions), and API Gateway.

DevOps & CI/CD:

Experience configuring automated pipelines (e.g., AWS CodePipeline, GitHub Actions) to sync MFEs with S3 buckets and manage CloudFront invalidations.

Database Knowledge:

Basic understanding of NoSQL (DynamoDB) or SQL (Postgres) for data persistence.

Personality & Traits

Self-Starter:

You take the initiative to identify site improvements, manage ticketing workflows, and independently develop high-quality solutions.

Adaptable Team Player:

You expertly manage competing priorities across multiple teams, pivoting seamlessly to meet shifting project demands.

Technical Problem Solver:

You have a track record of streamlining fragmented architectures by consolidating redundant methods (MUI, Bootstrap, Styled Components) into unified, reusable shared components.

Clearance & Eligibility

Must be a US Citizen.

Must have the ability to obtain a US Government Public Trust clearance. (Preference given to candidates with active or recent ICE or CBP clearance).

About Mobomo:

Mobomo is a full-service DevOps agency dedicated to creating elegant solutions to solve complex problems.

• Mobomo benefits include health care, paid time off, retirement savings and professional development.

Mobomo is an equal opportunity employer and we value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, gender identity or expression, sexual orientation, age, marital status, citizenship status, veteran status, disability status or any other basis as protected by federal state, or local law.