{"id":3103979,"url":"https://alion.io/job/mobi-senior-backend-ai-applications-engineer","title":"Senior Backend / AI Applications 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":"AI/ML","role_family":"AI/ML","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":140000,"max":200000,"currency":"USD","period":"year","gross":null,"usd_annual":200000},"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":"DynamoDB","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"Pytest","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false}],"status":"live","first_seen_at":"2026-10-22T15:08:22Z","employer_posted_date":"2026-10-22","last_verified_at":"2026-10-25T15:19:16Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"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 Backend / AI Applications Engineer at Mobi, you’ll join a collaborative, highly creative, and fast-paced team to design and build reliable backend services and AI-driven applications. 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 backend role with end-to-end ownership of production services, from clarifying ambiguous customer needs and making architecture trade-offs to implementation, deployment, monitoring, and ongoing reliability. You’ll work closely with product, design, and other engineers to build the APIs, integrations, and agent workflows behind Mobi’s travel AI products, delivering reliable experiences for our customers and their travelers.\nWe’re excited to work with someone who has made AI a meaningful part of how they build software. A strong proficiency in AI-assisted software development is essential to this role. You’ll bring hands-on experience using AI coding assistants and agents to turn ideas into production-ready features-from exploring solutions and writing code to testing, debugging, and refining what you’ve built. You know how to guide these tools thoughtfully, challenge their output, and take ownership of the results. Just as importantly, you’re curious about what’s possible and eager to discover and share new ways of working with AI.\nKey Responsibilities:\nDevelop, test, and maintain MCP services and agent applications that connect Mobi’s travel AI products to customer and partner systems.\n\nBuild and operate Python APIs, integrations, and AWS infrastructure with clear contracts, authentication, retries, idempotency, observability, and actionable error handling.\n\nCollaborate with cross-functional teams to define, design, and ship new features.\n\nUse AI coding assistants and agents throughout the development lifecycle to accelerate delivery while maintaining high standards for correctness, accessibility, performance, and maintainability.\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\nBuild automated unit, integration, contract, and end-to-end tests to verify software correctness and service reliability.\n\nDevelop scenario-based agent evaluations for tool selection, grounding, task completion, failure handling, and regressions, with explicit expected outcomes and checks for nondeterministic behavior.\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\nStrong Python skills and a track record of independently owning production backend services, explaining architecture trade-offs, and turning ambiguous requirements into reliable, maintainable systems.\n\nExperience writing automated Python tests (e.g., pytest), API and integration tests, and browser-based end-to-end tests where the product requires them.\n\nProficiency with backend APIs and RESTful services.\n\nExperience with AWS compute and storage services (e.g. Lambda, DynamoDB)\n\nDemonstrated ability to use AI coding assistants and agents to build and improve software, evidenced by professional work or substantial projects. You remain accountable for the design, code, tests, and production behavior.\n\nExperience directing AI tools through changes across multiple files in an existing codebase, including implementation, test generation, debugging, and refactoring.\n\nStrong 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.\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 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":7835,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["401k plan","Equity","Health insurance","Life insurance","Parental leave"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Industrial AI"],"lifecycle":[{"event":"open","at":"2026-10-22T18:21:44Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":2,"expected_fill_days":27,"reasons":["conf:1","win:early"],"computed_at":"2026-10-25T05:49:26Z"},"pay":{"stated_usd_annual":200000,"is_top_pay":false},"html_url":"https://alion.io/job/mobi-senior-backend-ai-applications-engineer","json_url":"https://alion.io/job/mobi-senior-backend-ai-applications-engineer.json","meta":{"generated_at":"2026-10-25T17:36:14Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":25019,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-26T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":24963},"rest":"https://alion.io/mcp/rest/get_company?id=24963"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmobi-senior-backend-ai-applications-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fmobi-senior-backend-ai-applications-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fmobi-senior-backend-ai-applications-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/mobi-senior-backend-ai-applications-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmobi-senior-backend-ai-applications-engineer"}]}