{"id":1234103,"url":"https://alion.io/job/mobi-senior-frontend-engineer-2","title":"Senior Frontend Engineer","company":{"id":24963,"name":"Mobi","domain":"mobi.ai","url":"https://alion.io/company/mobi","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Somerville, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":140000,"max":200000,"currency":"USD","period":"year","gross":null,"usd_annual":200000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ChatGPT","optional":false},{"name":"Claude","optional":false},{"name":"Claude Code","optional":false},{"name":"Copilot","optional":false},{"name":"Cypress","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"Jest","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"OpenAI Codex","optional":false},{"name":"Playwright","optional":false},{"name":"React.js","optional":false},{"name":"Recommender Systems","optional":false},{"name":"TypeScript","optional":false},{"name":"Vite","optional":false}],"status":"live","first_seen_at":"2026-02-16T00:28:40Z","employer_posted_date":"2026-02-16","last_verified_at":"2026-09-28T05:32:05Z","board_verified":true,"closed_at":null,"days_open":224,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":224},"description":"About the Role\nAs a Senior Frontend Engineer at Mobi, you will join a highly creative, fast-paced and fearless team tasked with building the next generation of AI-driven solutions.\nWe’re seeking a passionate and innovative Frontend Engineer to help define the next generation of intelligent customer experiences at the intersection of travel and AI. In this role, you’ll build elegant, highly interactive user interfaces that power AI-driven search and recommendation systems, virtual concierge services, and data-rich dashboards for analytics and visualization. You’ll collaborate closely with clients and cross-functional teams to translate user needs into beautiful, intuitive digital experiences - from concept through delivery.\nYou’ll be working on cutting-edge products that integrate with state-of-the-art AI platforms, including interactive AI assistants and app integrations based on the Model Context Protocol (MCP). This includes helping define how users interact with models and immersive AI interfaces beyond plain text - building experiences that connect ChatGPT, Claude, and other AI platforms to brand ecosystems with rich, responsive visual UIs rather than just conventional text responses. MCP Apps, a new extension of the MCP standard, enables real-time interactive components within AI chat environments, and you’ll help leverage this technology to create seamless, useful tools for our customers.\nWe work with major global brands and industry leaders to shape the search and concierge experience for their users. Some client engagements involve deep collaboration to understand unique requirements and deliver tailored solutions, while others push the boundaries of what’s possible with evolving AI ecosystems. If you thrive at the intersection of bleeding-edge technologies, customer engagement, and beautifully designed front-end systems, this is your opportunity to make a major impact.\nKey Responsibilities:\nDevelop, test, and maintain scalable front-end applications using modern frameworks and libraries (e.g., React).\n\nTranslate UI/UX design wireframes and prototypes into high-quality, responsive, and accessible code.\n\nCollaborate with cross-functional teams to define, design, and ship new features.\n\nOptimize applications for maximum speed, scalability, and performance.\n\nStay current with front-end trends, tools, and emerging AI technologies.\n\nReview code to troubleshoot, debug, and resolve issues.\n\nOwn the full frontend lifecycle from development through testing and shipping, while implementing best practices for code quality, maintainability, and comprehensive testing (unit, integration, and end-to-end).\n\nQualifications:\nBachelor’s degree in Computer Science, Engineering, or related field-or equivalent practical experience.\n\nProficiency in HTML5, CSS3, JavaScript (ES6+).\n\nExperience with React framework.\n\nExperience with TypeScript.\n\nFamiliarity with testing frameworks (e.g., Playwright, Jest, Cypress).\n\nExperience and comfort using AI Tools (CodeX, Claude Code, Copilot, etc.) to automate workflows\n\nUnderstanding of backend APIs, and RESTful services.\n\nUnderstanding of responsive design principles and cross-browser compatibility.\n\nExperience with build tools and version control (e.g., Next, Vite, Git).\n\nStrong problem-solving skills and a collaborative mindset.\n\nRecent Experience working on AI Applications.\n\nBonus: Understanding of MCP and response streaming.\n\nPay Transparency:\nThe base salary range for this US full-time position is between $140,000- $200,000 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.","description_format":"text","description_chars":4089,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","AI Consulting & Integration"],"lifecycle":[{"event":"open","at":"2026-09-25T15:48:58Z"}],"liveness":{"score":5,"band":"cold","label":"Long shot","p_open":1,"p_active":0.184,"p_room":0.28,"age_days":224,"expected_fill_days":23,"reasons":["conf:0","win:tail","crowd:"],"computed_at":"2026-09-28T05:45:00Z"},"pay":{"stated_usd_annual":200000,"is_top_pay":true},"html_url":"https://alion.io/job/mobi-senior-frontend-engineer-2","json_url":"https://alion.io/job/mobi-senior-frontend-engineer-2.json","meta":{"generated_at":"2026-09-28T05:57:14Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":4137,"day_limit":5000,"remaining_today":863,"minute_limit":60,"resets_at":"2026-09-29T00:00:00Z"}}}