Senior Frontend Engineer

As a Senior Frontend Engineer at Mobi, you’ll own customer-facing features from defining the problem and making design trade-offs to implementation, release, and production support.

We’re looking for a curious engineer who can turn ambiguous customer needs into reliable, accessible experiences for AI-powered travel.

You’ll build interactive search and recommendation experiences, virtual concierge services, and data-rich dashboards. You’ll work directly with clients, designers, backend engineers, and AI engineers to scope solutions, explain trade-offs, and iterate on what users need.

You’ll build tool-driven interfaces for AI assistants and app integrations, including Model Context Protocol (MCP) apps. The work includes streaming and partial results, authentication and session continuity, and clear loading, error, and confirmation states., * Design, build, and maintain production React and TypeScript applications, making explicit trade-offs in component architecture, state management, and maintainability.

• Turn designs and prototypes into responsive, accessible interfaces, including keyboard navigation, screen reader support, and usable pending, error, and confirmation states.
• Use AI coding assistants and agents throughout the development lifecycle to accelerate delivery while maintaining high standards for correctness, accessibility, performance, and maintainability.
• Work with design, backend, and AI engineers to define UI contracts for tool calls, streaming, session state, and recoverable failures.
• Measure and improve frontend performance, including responsiveness, rendering, and the user experience during slow or interrupted requests.
• Stay current with front-end trends, tools, and emerging AI technologies.
• Debug production issues across browser rendering, application state, and API integration; use telemetry and reproducible cases to find root causes and prevent regressions.
• Build and maintain deterministic unit, component, integration, and end-to-end tests for UI behavior and API contracts. Partner with AI and backend engineers on scenario-based evaluation of model-driven interactions, including partial results, failures, and user confirmations.
• Develop and share effective AI-assisted workflows to improve engineering productivity and code quality.

User Interface/Experience (UI/UX), Artificial Intelligence (AI), Power Generation, System Integration (SI), Team Building, Team Lead/Manager, Communication Skills, Business Growth, Customer Relations, Production Support, AI-assisted software development is essential to this role. You should be able to show how you use coding assistants and agents to implement, test, debug, and refine changes across an existing codebase, through professional or substantive project work. You remain accountable for the result: understanding the code, checking assumptions, and independently verifying correctness, security, accessibility, and maintainability., * Bachelor’s degree in Computer Science, Engineering, or related field-or equivalent practical experience.

• Proficiency in HTML5, CSS3, JavaScript (ES6+).
• Deep practical experience with React, including component architecture, state management, and diagnosing rendering and performance issues.
• Strong practical TypeScript skills, including type-safe component and API contracts and the ability to work confidently in an existing codebase.
• Experience writing and maintaining reliable automated frontend tests with tools such as Playwright, Jest, or Cypress, including asynchronous behavior and failure cases.
• Demonstrated proficiency with AI coding assistants and agents, shown through professional or substantive project work that you can explain, test, and critically review.
• Experience directing AI tools through changes across multiple files in an existing codebase, including implementation, test generation, debugging, and refactoring.
• Strong judgment in evaluating AI-generated solutions: able to explain the code, verify its behavior, identify errors, and recognize when independent investigation or a different approach is needed.
• Experience integrating frontend applications with RESTful APIs and asynchronous services, including authentication, session state, and error recovery.
• Understanding of responsive design principles and cross-browser compatibility.
• Experience with build tools and version control (e.g., Next, Vite, Git).
• Evidence of independently shipping and supporting complex frontend features, explaining design tradeoffs, and collaborating effectively with designers, customers, and engineers.
• Preferred: Experience shipping AI-powered user interfaces.
• Bonus: Understanding of MCP and response streaming.

• Competitive Base Salary + Annual Bonus
• Comprehensive Health Insurance (Medical, Dental, and Vision) for you and your family, covered mostly by the company.
• Company-paid Disability and Life Insurance
• Optional Pet Insurance and Identity Theft Protection
• Paid Parental Leave (for all types of parents and families)
• Equity ownership in the company
• 401k Plan
• Unlimited Paid Time Off + $1,000 Bonus for taking five consecutive days off
• Flexibility to work anywhere in the world for one month a year
• Tuition Reimbursement
• Cell Phone & Transportation Reimbursement
• Lunch daily from local restaurants
• Cozy office environment with a full kitchen, massage chairs, live plants, and much more!

Mobi hires those willing to work either full-time in office or on a hybrid schedule., The base salary range for this US full-time position is between $140,000 - $190,000 and is eligible for an annual company bonus, subject to standard withholding and applicable taxes. All candidates receive equity (ISO) and access to a comprehensive benefits offering. The base salary range reflects the minimum and maximum targets for candidates. The following factors are considered when determining the compensation offered: work location, skills, experience, and any relevant education or training. The Recruiter or Hiring Manager can share more about the specific salary range with you during the recruitment process and answer any questions you have.

Mobi partners with the world’s leading travel brands to create AI experiences that change how people discover and book travel.

By combining deep AI expertise with more than a decade of experience in travel commerce, Mobi helps travel brands understand what travelers want, deliver more relevant experiences, and convert AI-driven intent into direct bookings. Our technology connects the intelligence of AI with the realities of travel-integrating with the systems brands already use while creating new opportunities to engage customers throughout their journey. We’re building the infrastructure that will power the next generation of travel commerce.

Working at Mobi

We believe the best ideas emerge when diverse perspectives come together, so we’re building a team that truly reflects that belief. If you’re energized by complex challenges, inspired by working alongside thoughtful teammates, and passionate about building technology that enhances-rather than replaces-what makes us human, you’ll feel right at home here.

Our work is centered on five core values:

• Show up, be you. We welcome every kind of thinker, maker, and teammate: quiet or bold, methodical or messy, with all their talents and quirks. Inclusion isn’t a checkbox-it’s how we connect, grow together, and do our best work.
• Be scrappy, stay steady. We’re resilient and quick on our feet, adapting with creativity and staying grounded when things shift.
• Create transparency, collaborate better. We believe knowledge grows when it’s shared. Clear, open communication builds trust and strengthens collaboration.
• Foster community, be compassionate. We show up for our teammates, customers, and neighbors. Strong businesses grow from relationships built with care and grounded in shared effort.
• Build thoughtfully, create impact. We design for clarity, build for scale, and measure success through real-world impact.