{"id":1275143,"url":"https://alion.io/job/expedia-group-principal-software-development-engineer-business-to-agent","title":"Principal Software Development Engineer - Business to Agent","company":{"id":1763687,"name":"Expedia Group","domain":"expediagroup.com","url":"https://alion.io/company/expediagroup-com","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":100,"open_postings":26,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":11,"computed_at":"2026-10-19T05:45:15Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Seattle, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":231000,"max":323500,"currency":"USD","period":"year","gross":null,"usd_annual":323500},"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"Chain-of-Thought","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"Go","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"Kubernetes","optional":false},{"name":"OpenAI Codex","optional":false},{"name":"Python","optional":false},{"name":"RAG","optional":false},{"name":"Scala","optional":false},{"name":"LLM Guardrails","optional":true}],"status":"closed","first_seen_at":"2026-09-17T00:00:00Z","employer_posted_date":"2026-09-17","last_verified_at":"2026-10-19T08:43:57Z","board_verified":false,"closed_at":"2026-10-19T08:43:57Z","days_open":32,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":32},"description":"At Expedia Group, we help travelers explore the world, one journey at a time. As a global travel company powered by passionate people, trusted partnerships, and leading technology, we connect travelers, partners, and advertisers through our consumer brands, B2B network, and travel advertising business.\nHere, you'll do meaningful work that helps millions of people discover, book, and experience travel with more ease, confidence, and joy. Our five Behaviors-Traveler First, Think Big, Operate with Excellence, Ownership Mindset, and Succeed Together-help foster a supportive environment where people can grow their careers and have the flexibility, benefits, and support to do their best work. Join us and build for travelers everywhere.\nWe create and deliver tailored marketing strategies for Expedia Group’s brands, focusing on establishing strong connections and cohesive experiences for travelers and partners. We leverage our functional expertise and creative excellence to build trust and loyalty for our brands through innovative marketing approaches and technology.\nAt Expedia Group, we’re entering a new era where AI agents become a primary interface between travellers and brands, reshaping how intent, search, evaluation, and booking happen end-to-end. We were early in this space with our early investments,and we’re extending that foundation into a dedicated marketing capability focused on influencing agents across the full travel funnel.\nThis role will be part of an AI-native team that sits at the intersection of marketing, AI, and large-scale platforms. We build the systems that make Expedia Group’s supply, pricing, and brand legible, accessible, and preferred by horizontal agents, agent browsers, co-workers, and emerging agent surfaces.\nIf you’re excited to define how Expedia Group shows up to AI agents and build the systems that make us the number one AI agent marketer in travel, this role is for you.\nIn this role, you will:\nSet technical vision for agentic marketing and own the outcomes\nLead technical vision and own the target architecture for the agentic marketing platform - spanning data, services, workflows, experimentation, third-party APIs, and agent-facing surfaces - partnering closely with the agentic search lead, who owns channel strategy and outcomes.\n\nTranslate the agentic search strategy and investment roadmap into a sequenced, opinionated engineering plan with clear trade-offs and success criteria.\n\nPartner with product, marketing, data science, SEO/AEO, and architecture leaders to align on priorities, interfaces, and ownership boundaries.\n\nWork cross functionally with many internal and external teams to deliver outcomes with proven ability to influence without direct authority.\n\nBuild agent legibility & access\nDesign and ship systems that make EG content, reliably machine-readable and preferred for different agent archetypes (horizontal agents, agentic commerce, browsers, co-workers).\n\nExtend marketing surfaces beyond traditional web indicesinto agent-specificindices, model training data, live retrieval, and memory infrastructure.\n\nCreate and evolve products designed for specific agent archetypes and crawlers - including agent-specific surfaces, indices, and CLIs.\n\nBuild 0-to-1: stand up the first measurement, agent-observability, data/content, and agent-specific products (CLIs, indices, agents).\n\nArchitect engineering workflows around fleets of autonomous coding agents and sub-agents, treating orchestration of agent labor - not just personal output - as the core leverage model.\n\nEnsure high-quality Agent Access via APIs, MCPs, feeds, and other integration points, including authorization, observability, and SLOs.\n\nLead the designof observabilityandexperimentation tounderstand how agents reason (e.g., chain-of-thought logging, ranking signals, bias analysis).\n\nAnchor a small and focused engineering squad\nServe as the technical anchor for a small, ring-fenced squad (STL + engineers), setting engineering standards, reviewing designs, and making crisp architectural calls while working closely with the broader engineering team.\n\nCoach and mentor engineers across Marketing Tech and adjacent orgs, raising the bar on system design, AI integration, experimentation, and operational excellence.\n\nFoster an AI-native, zero-coordination tax culture that uses automation and agents to amplify output and move quickly, with failure as a design principle.\n\nEnsure systems are observable, resilient, secure, and cost-efficient, with clear SLOs and runbooks.\n\nOperate with a highly discretionary build budget - pre-approved token consumption, AI vendor adoption, and unconventional experimentation (e.g., dedicated hardware for synthetic agent-log generation) - and spend it to maximize speed.\n\nMinimum qualifications\n10+ years of hands-on software engineering experience (or 6+ with a Master’s)\n\nHands-on experience with agentic / AI systems (LLMs, RAG, tools/MCPs, agent orchestration)\n\nDemonstrated expertise in systems architecture, API design, and integrating third-party products and platforms\n\nProduct sense, ability to reason about what to build and for whom, prioritize on desirability / feasibility / viability, and partner with product as a peer\n\nStrong proficiency in at least one modern backend language (e.g., Java, Kotlin, Go, Python, Scala) and comfort working across services, data, and infrastructure\n\nStrong experience with cloud platforms (AWS preferred) and container orchestration (Kubernetes), plus modern CI/CD and observability tooling\n\nSolid understanding of data modelling, streaming/batch processing, and experimentation frameworks\n\nHas architected scalable, high traffic services that translate a product vision into an end to end technical system\n\nPractical experience with AI developer tools (e.g., Claude, GitHub Copilot, Cursor, Codex, Kiro), including evaluating adoption, usage depth, and impact on developer workflows and outcomes.\n\nStrong cross-functional collaboration skills: able to partner with marketing, product, data science, architecture, and legal to make high-quality trade-offs\n\nExperience mentoring senior engineers, building healthy engineering cultures, and influencing without formal authority\n\nPreferred qualifications:\nExperience with marketing technology, ad platforms, or growth/optimization stacks\n\nActive immersion in the AI ecosystem - relationships with frontier labs, agent platforms, or AI-native startups treated as a meaningful signal of genuine engagement, not just familiarity.\n\nFamiliarity with AI/ML in production-model integration patterns, evaluation, safety guardrails\n\nComfort operating in pre-playbook spaces where hypotheses will be wrong, experiments will fail, and rapid iteration is required\n\nProven ability to translate ambiguous strategy into executable technical roadmaps, balancing near-term delivery with long-term architecture\n\nThe total cash range for this position in Seattle is $231,000.00 to $323,500.00. Employees in this role have the potential to increase their pay up to $369,500.00, which is the top of the range, based on ongoing, demonstrated, and sustained performance in the role.\nStarting pay for this role will vary based on multiple factors, including location, available budget, and an individual’s knowledge, skills, and experience. Pay ranges may be modified in the future.\nBenefits and perks\nExpedia Group offers benefits and perks designed to support employees and their families, including medical, dental, and vision coverage, paid time off, an Employee Assistance Program, wellness and travel reimbursement, travel discounts, and International Airlines Travel Agent Network (IATAN) membership. Learn more about life at Expedia Group at https://careers.expediagroup.com/life.\nAccommodation requests\nExpedia Group is committed to providing an inclusive and accessible recruiting experience. If you need an accommodation or adjustment due to a disability during the application or recruiting process, please submit a request athttps://expedia.service-now.com/askeg?id=job_accommodation.\nAbout Expedia Group\nExpedia Group includes three flagship consumer brands - Expedia, Hotels.com, and Vrbo - along with a leading B2B travel business and travel advertising offerings. Across our brands and business, we help travelers explore the world with confidence and ease.\nImportant notice\nEmployment opportunities and job offers at Expedia Group will always come from Expedia Group's Talent Acquisition and hiring teams. Never share sensitive personal information unless you are confident of the recipient. Expedia Group does not extend job offers via email or messaging tools to individuals with whom we have not made prior contact. Our email domain is @expediagroup.com. The official place to find and apply for roles is https://careers.expediagroup.com/jobs/.\nEqual Opportunity\nExpedia is committed to creating an inclusive work environment with a diverse workforce. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, or any other characteristic protected by law. This employer participates in E-Verify. 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