{"id":1454961,"url":"https://alion.io/job/simpson-thacher-bartlett-llp-senior-ai-engineer","title":"Senior AI Engineer","company":{"id":1842699,"name":"Simpson Thacher & Bartlett","domain":"stblaw.com","url":"https://alion.io/company/stblaw","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":78,"open_postings":15,"ghost_share":0,"stale_share":0.867,"repost_share":0,"time_to_fill_p50_days":24,"computed_at":"2026-10-22T06:10:10Z"}},"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":["New York, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":175000,"max":200000,"currency":"USD","period":"year","gross":null,"usd_annual":200000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agentic Workflows","optional":false},{"name":"AI Agents","optional":false},{"name":"Anthropic","optional":false},{"name":"Azure","optional":false},{"name":"Claude Code","optional":false},{"name":"LLM","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"Multi-Agent Systems","optional":false},{"name":"OpenAI","optional":false},{"name":"Prompt Engineering","optional":false},{"name":"Python","optional":false},{"name":"RAG","optional":false},{"name":"Semantic Search","optional":false}],"status":"live","first_seen_at":"2026-09-28T00:00:00Z","employer_posted_date":"2026-10-14","last_verified_at":"2026-10-21T15:35:45Z","board_verified":true,"closed_at":null,"days_open":24,"trust":{"level":"ok","repost_count":1,"flags":[],"days_open":24},"description":"Simpson Thacher & Bartlett LLP is looking for a Senior AI Engineer to join the Infrastructure Automation & Orchestration team. The Senior AI Engineer is responsible for designing, building, and operationalizing enterprise-scale Generative AI solutions, agents, and AI-powered applications. This role develops scalable AI systems leveraging Large Language Models (LLMs), retrieval-augmented generation (RAG), agentic workflows, Model Context Protocol (MCP) frameworks, tools, hooks, and custom integrations.\nThe Senior AI Engineer will partner closely with business stakeholders, software engineers, architects, and data teams to identify high-value AI opportunities and translate them into production-ready solutions. This role requires hands-on experience building AI applications, integrating enterprise systems, developing autonomous and semi-autonomous agents, and implementing governance, security, and operational best practices in an enterprise environment.\nESSENTIAL JOB DUTIES & RESPONSIBILITIES\nDesign, develop, and deploy enterprise Generative AI solutions using commercial and open-source foundation models.\n\nBuild and maintain AI agents, agent orchestration frameworks, and multi-agent systems to automate complex business processes.\n\nDevelop and implement Retrieval-Augmented Generation (RAG) architectures leveraging enterprise knowledge repositories and structured/unstructured data sources.\n\nDesign and develop custom AI tools, hooks, skills, and integrations to extend agent capabilities and improve business outcomes.\n\nBuild and maintain MCP (Model Context Protocol) servers and related infrastructure to securely integrate AI systems with enterprise applications and services.\n\nDevelop AI-powered applications using Python, APIs, cloud-native services, etc.\n\nMonitor, optimize, and scale data workflows to improve performance and cost-efficiency.\n\nDevelop best practices for data engineering processes, documentation, and governance.\n\nPartner with infrastructure and security teams to implement scalable, secure, and compliant AI solutions.\n\nCollaborate with stakeholders to identify, prioritize, and deliver high-impact AI use cases.\n\nProvide technical guidance on AI architecture, implementation patterns, and emerging industry capabilities.\n\nEDUCATION\nBachelor’s degree in Computer Science, Information Systems, or a related field, or equivalent practical experience in lieu of formal education.\n\nLegal IT experience a plus but not required.\n\nSKILLS AND EXPERIENCE\nRequired\n5 - 8 years of experience in software engineering, cloud engineering, or AI engineering.\n\n2+ years of experience designing and deploying Generative AI or LLM-based solutions in enterprise environments.\n\nStrong experience with Python and modern software development practices.\n\nExperience building AI agents/frameworks and AI-powered automation solutions.\n\nExperience developing custom AI tools, skills, functions, and integrations.\n\nExperience integrating AI solutions with enterprise APIs, databases, and SaaS platforms.\n\nStrong understanding of prompt engineering, context management, model evaluation, and AI application architecture.\n\nKnowledge of vector databases, semantic search, and document retrieval techniques.\n\nStrong understanding of AI security, governance, and data privacy practices.\n\nExceptional analytical, troubleshooting, and problem-solving abilities.\n\nExcellent communication skills and experience working with both technical and non-technical stakeholders.\n\nPreferred\nExperience with Claude Code, Anthropic APIs, MCP servers, and agentic development frameworks.\n\nExperience with Azure AI Foundry, Azure OpenAI Service, Azure AI Search, and related Azure AI services.\n\nSalary Information\nNY Only: The estimated base salary range for this position is $175,000 to $200,000 at the time of posting.\nThe actual salary offered will depend on a variety of factors, including without limitation, the qualifications of the individual applicant for the position, years of relevant experience, level of education attained, certifications or other professional licenses held, and if applicable, the location in which the applicant lives and/or from which they will be performing the job. This role is exempt meaning it is not overtime pay eligible.\nSimpson Thacher will not sponsor applicants for work visas for this position.\nPrivacy Notice\nFor information about how Simpson Thacher & Bartlett LLP collects and processes your personal information, please refer to our Privacy Notice available at https://www.stblaw.com/other/privacy-notice.\nSimpson Thacher & Bartlett is committed to a collegial work environment in which all individuals are treated with respect and dignity. The Firm prohibits discrimination or harassment based upon race, color, religion, gender, gender identity or expression, age, national origin, citizenship status, disability, marital or partnership status, sexual orientation, veteran’s status or any other legally protected status. This Policy pertains to every aspect of an individual’s relationship with the Firm, including but not limited to recruitment, hiring, compensation, benefits, training and development, promotion, transfer, discipline, termination, and all other privileges, terms and conditions of employment.\n#LI-Hybrid","description_format":"text","description_chars":5268,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Legal Services"],"lifecycle":[{"event":"open","at":"2026-09-29T09:22:48Z"},{"event":"close","at":"2026-09-30T06:54:10Z"},{"event":"reopen","at":"2026-10-15T04:33:55Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 82 · green card filings: 5","filings_12m":82,"filings_prev_12m":71,"green_card_filings_12m":5,"median_offered_wage_usd":268822,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":1}],"liveness":{"score":31,"band":"fade","label":"Fading","p_open":1,"p_active":0.567,"p_room":0.55,"age_days":24,"expected_fill_days":24,"reasons":["conf:14","stale_co","velocity","win:tail"],"computed_at":"2026-10-22T06:10:10Z"},"pay":{"stated_usd_annual":200000,"is_top_pay":false},"html_url":"https://alion.io/job/simpson-thacher-bartlett-llp-senior-ai-engineer","json_url":"https://alion.io/job/simpson-thacher-bartlett-llp-senior-ai-engineer.json","meta":{"generated_at":"2026-10-22T20:59:35Z","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":5349,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-23T00:00:00Z"}},"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":1842699},"rest":"https://alion.io/mcp/rest/get_company?id=1842699"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsimpson-thacher-bartlett-llp-senior-ai-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%2Fsimpson-thacher-bartlett-llp-senior-ai-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%2Fsimpson-thacher-bartlett-llp-senior-ai-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/simpson-thacher-bartlett-llp-senior-ai-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsimpson-thacher-bartlett-llp-senior-ai-engineer"}]}