{"id":1355603,"url":"https://alion.io/job/mobi-senior-full-stack-engineer","title":"Senior Full Stack 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":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","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":150000,"max":190000,"currency":"USD","period":"year","gross":null,"usd_annual":190000},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"AWS","optional":false},{"name":"AWS Lambda","optional":false},{"name":"Claude Code","optional":false},{"name":"Copilot","optional":false},{"name":"Cypress","optional":false},{"name":"DynamoDB","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"OpenAI Codex","optional":false},{"name":"Playwright","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-09-27T19:23:19Z","employer_posted_date":"2026-09-27","last_verified_at":"2026-10-17T01:04:23Z","board_verified":true,"closed_at":null,"days_open":19,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":19},"description":"About Mobi.AI\nMobi partners with the world's leading travel brands to create AI experiences that change how people discover and book travel.\nBy 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.\nWorking at Mobi\nWe 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.\nOur work is centered on five core values:\nShow 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.\n\nBe scrappy, stay steady. We’re resilient and quick on our feet, adapting with creativity and staying grounded when things shift.\n\nCreate transparency, collaborate better. We believe knowledge grows when it’s shared. Clear, open communication builds trust and strengthens collaboration.\n\nFoster 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.\n\nBuild thoughtfully, create impact. We design for clarity, build for scale, and measure success through real-world impact.\n\nAbout the Role\nAs a Senior Full Stack Engineer, you’ll join a collaborative, highly creative, and fast-paced team to design and build cutting-edge web experiences and AI-driven solutions. You’ll play a key role as both architect and developer, shaping technologies that power Mobi’s portfolio of travel AI products -used by some of the world’s leading brands.\nThis is a hands-on role with the opportunity to work across the stack-from building intuitive product experiences to developing the APIs, services, and systems that power them. You’ll work closely with product, design, and other engineers to turn complex problems into simple, reliable experiences for our customers and their travelers.\nKey Responsibilities\nDevelop, test, and maintain scalable MCP and agent applications using modern frameworks and libraries.\n\nBuild, maintain, and optimize APIs and infrastructure.\n\nCollaborate with cross-functional teams to define, design, and ship new features.\n\nOptimize applications for maximum speed, scalability, and performance.\n\nReview code to troubleshoot, debug, and resolve issues; Implement best practices for code quality, testing, and maintainability.\n\nFollow best practices for testing and evaluation of agent applications, including unit, integration, and end-to-end testing.\n\nStay current with trends, tools, and emerging technologies in the field of computer science and artificial intelligence.\n\nQualifications\nBachelor’s degree in Computer Science, Engineering, or related field-or equivalent practical experience.\n\nProficiency in Python.\n\nFamiliarity with testing frameworks (e.g., Jest, Cypress, Playwright).\n\nProficiency with backend APIs and RESTful services.\n\nExperience with AWS compute and storage services (e.g. Lambda, DynamoDB).\n\nExperience and comfort using AI Tools (CodeX, Claude Code, Copilot, etc.) to automate workflows.\n\nStrong problem-solving skills and a collaborative mindset.\n\nUnderstanding of MCP and Agent frameworks.\n\nBenefits & Perks\nCompetitive Base Salary + Annual Bonus\n\nComprehensive Health Insurance (Medical, Dental, and Vision) for you and your family, covered mostly by the company.\n\nCompany-paid Disability and Life Insurance\n\nOptional Pet Insurance and Identity Theft Protection\n\nPaid Parental Leave (for all types of parents and families)\n\nEquity ownership in the company\n\n401k Plan\n\nUnlimited Paid Time Off + $1,000 Bonus for taking five consecutive days off\n\nFlexibility to work anywhere in the world for one month a year\n\nTuition Reimbursement\n\nCell Phone & Transportation Reimbursement\n\nLunch daily from local restaurants\n\nCozy office environment with a full kitchen, massage chairs, live plants, and much more!\n\nMobi hires those willing to work either full-time in office or on a hybrid schedule.\nEqual Opportunity\nWe are an equal opportunity employer; applicants, employees, and former employees are protected from employment discrimination and harassment of any type based on race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, protected veteran status and genetic information (including family medical history), or any other characteristic protected by federal, state or local laws.\nPay Transparency\nThe base salary range for this US full-time position is $150,000-$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. 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