Jr Front End Developer (P-139)

SMASH, Who we are?
We are agents for tech professionals that help them build careers in the United States.

We believe in long-lasting relationships with our talent. We invest time getting to know them and understanding what they seek as their professional next step.

We aim to find the perfect match. As agents, we pair our talent with our US clients, not only by their technical skills but as a cultural fit. Our core competency is to find the right talent fast.

We purposefully move away from the “contractor” or “outsourcing” type of relationship. Our clients don’t want contractors or “just a service.” Neither does our talent.

Our Benefits

• Wellness Coverage

• Remote Work

• Birthday day off

• Recognition and rewards system

• Referrals Program

• Business skill coaching

• English classes for Smashers and relatives

• Learning opportunities

Role summary
You will design and build a production-grade, highly intuitive frontend that simplifies complex AI-driven contract validation workflows. This role focuses on translating sophisticated financial, contractual, and agentic AI logic into explainable, user-friendly interfaces that enable fast decision-making, transparency, and overpayment prevention.

Responsibilities

• Design and implement UI v9.0 with full schema coverage across 245+ contract and validation fields.

• Build complex, multi-tab contract detail views using progressive disclosure patterns.

• Develop three-panel exception comparison views (Contract Expected vs Invoice Received vs Resolution).

• Implement real-time dashboards, including prevented overpayment counters and validation queues.

• Visualize agentic AI reasoning, confidence scores, and extraction quality indicators.

• Create explainable AI interfaces that clearly answer “why” an exception was flagged.

• Design and implement feedback loops to allow users to correct or validate AI findings.

• Build advanced data visualizations for compliance trends, vendor performance, and pattern detection.

• Implement priority-based validation queues using impact, urgency, and confidence scoring.

• Develop mobile-responsive experiences with bottom-tab navigation for approvals on the go.

• Integrate frontend components with REST and GraphQL APIs and real-time updates via WebSockets.

• Collaborate closely with product, design, and backend teams to deliver scalable, high-quality UI solutions.

Requirements – Must-haves

• Strong experience building complex frontend applications using React and TypeScript.

• Proven expertise in UI/UX design principles, including information architecture and progressive disclosure.

• Hands-on experience with responsive and mobile-first design (CSS Grid, Flexbox).

• Experience implementing advanced data visualizations using D3.js, Chart.js, or similar libraries.

• Proficiency with state management patterns (Redux, Context API) for large-scale applications.

• Experience consuming REST and GraphQL APIs and handling real-time data updates.

• Strong attention to accessibility standards (WCAG) and usability best practices.

• Ability to translate complex business logic into intuitive, user-centered interfaces.

• Strong collaboration and communication skills in cross-functional, fast-paced environments.

Nice-to-haves (optional)

• Experience designing explainable AI or human–AI interaction (HAI) interfaces.

• Background working with financial, contract management, or compliance systems.

• Familiarity with Figma or Sketch for high-fidelity prototyping.

• Experience with analytics-heavy dashboards or workflow-driven enterprise applications.

• Exposure to AI-driven products, agentic workflows, or RAG-based systems.

Languages

• English B2+, Spanish C1