{"id":1201440,"url":"https://alion.io/job/proofpoint-senior-research-applied-ai-engineer","title":"Senior Research Applied AI Engineer","company":{"id":5122,"name":"Proofpoint","domain":"proofpoint.com","url":"https://alion.io/company/proofpoint","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":82,"open_postings":15,"ghost_share":0,"stale_share":0.733,"repost_share":0,"time_to_fill_p50_days":34,"computed_at":"2026-09-26T05:45:00Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["United States"],"countries":["US"],"hiring_countries":["US"],"hiring_countries_total":1,"salary":{"min":200300,"max":293810,"currency":"USD","period":"year","gross":null,"usd_annual":293810},"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Claude Code","optional":false},{"name":"Cursor","optional":false},{"name":"Fine-tuning","optional":false},{"name":"Flyte","optional":false},{"name":"Kubernetes","optional":false},{"name":"Langfuse","optional":false},{"name":"LiteLLM","optional":false},{"name":"LLM","optional":false},{"name":"Python","optional":false},{"name":"Model Context Protocol","optional":true}],"status":"live","first_seen_at":"2026-09-24T21:04:32Z","employer_posted_date":"2026-09-25","last_verified_at":"2026-09-27T04:13:11Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"About Us:\nProofpoint is a global leader in human- and agent-centric cybersecurity. We protect how people, data, and AI agents connect across email, cloud, and collaboration tools. Over 80 of the Fortune 100, 10,000 large enterprises, and millions of smaller organizations trust Proofpoint to stop threats, prevent data loss, and build resilience across their people and AI workflows. Our mission is simple: safeguard the digital world and empower people to work securely and confidently. Join us in our pursuit to defend data and protect people.\nHow We Work:\nAt Proofpoint you’ll be part of a global team that breaks barriers to redefine cybersecurity guided by our BRAVE core values:\nBold in how we dream and innovate\nResponsive to feedback, challenges and opportunities\nAccountable for results and best in class outcomes\nVisionary in future focused problem-solving\nExceptional in execution and impact\nThe Role\nAI is moving faster than any single product team can keep up with. For a security company, the hard question isn’t “can a model do this?” It’s which approach actually works, what it costs, how fast and reliable it is, and whether it’s worth building at all. That’s what this team answers. We’re an Applied AI Research team, and research is our product. We take important questions the company can’t yet answer and turn them into evidence people can act on.\nAs a Senior Applied AI Engineer, you’ll own a line of research from start to finish: frame the question, build what’s needed to answer it, measure honestly, and reach a decision. When something is ready to move to another team, you’ll help them deploy it well, advising on the AI side and on how to monitor it once it’s live. Sometimes the answer is “this works, here’s the proof.” Sometimes it’s “this won’t work, and we found out in three weeks instead of six months.” Both count as success here.\nWhat you'll do\nAnswer hard questions with evidence. Take a question nobody has answered yet. Make it testable, set a baseline, run the smallest experiment that settles it, and come back with an answer the company can act on. \nBuild systems that improve themselves. A lot of our agentic work runs in long loops: run an evaluation, study the results, produce a better version, run it again. You’ll build systems that improve on their own and recover when they go wrong. \nMake agent behavior measurable. Extend our evaluation platform so we can tell whether an agent is genuinely good - task suites, regression checks, and honest tradeoffs between quality, cost and speed. It’s something we build and maintain for the whole company. \nWork across hosted and self-hosted models. Most of what we do runs on third-party model APIs. We also serve open-weight models on our own GPUs and are pushing further into fine-tuning and efficient serving. You’ll help us work out which jobs suit which. \nImprove how we build with coding agents. We use coding agents every day and benchmark them against our own codebases. You’ll help our engineers get more out of them. \nStart from real problems. Spend time with stakeholders, understand their problems rather than collecting feature requests, and turn what you hear into research worth doing. \nPut working things in people’s hands. Build prototypes, playgrounds and APIs so stakeholders can try an idea themselves and learn alongside us. Often that’s how the decision gets made. \nHelp get it into production. When something works, we don’t just hand it over. You’ll advise the team deploying it - on the AI side, and on how to monitor and understand the system once it’s running. \nHelp the team get better. Mentor engineers, share what you learn, and help the team ask better questions. \nWhat we're looking for\nBachelors, Masters or PhD in Computer Science or related field or equivalent experience\n5+ years building software and ML systems, with recent hands-on work on LLM systems that went past the prototype stage, 7+ years preferred.\n3+ years of research experience (understanding customer problems and deriving/brainstorming solutions)\nExperience with Claude Code, Cursor or similar, used daily, without lowering your standard for correctness and tests. \nExperience in building and deeply evaluating agentic systems in production\nExperience with third-party model APIs and open-weight models (we run on our own GPU fleet)\nStrong Python and solid ML fundamentals\nDemonstrated expertise in AI evaluation, one of the most challenging and strategically important areas of modern artificial intelligence\nFamiliarity with Kubernetes inference platform, Flyte for orchestration, LiteLLM / Langfuse and internal tooling for evaluation and tracing\n\nNice to Have\nExperience building open weights LLMs (not only classical (non-LLM) ML models) and evaluating the system to quantify business value\nExperience fine-tuning or serving open-weight models\nExperience with automated prompt and pipeline optimization\nExperience with multi-GPU serving and or MCP and tool protocols\nPrevious cybersecurity experience such as phishing or threat detection\nOpen-source contributions or publications\nWhy Proofpoint?\nAt Proofpoint, we believe that an exceptional career experience includes a comprehensive compensation and benefits package. Here are just a few reasons you’ll love working with us:\nCompetitive compensation\n\nComprehensive benefits\n\nCareer success on your terms\n\nFlexible work environment\n\nAnnual wellness and community outreach days\n\nAlways on recognition for your contributions\n\nGlobal collaboration and networking opportunities\n\nOur Culture:\nOur culture is rooted in values that inspire belonging, empower purpose and drive success-every day, for everyone.\nWe encourage applications from individuals of all backgrounds, experiences, and perspectives. If you need accommodation during the application or interview process, please reach out to .\nHow to Apply\nInterested? Submit your application along with any supporting information- we can’t wait to hear from you!\nConsistent with Proofpoint values and applicable law, we provide the following information to promote pay transparency and equity. Our compensation reflects the cost of labor across several U.S. geographic markets, and we pay differently based on those defined markets as set out below. Pay within these ranges varies and depends on job-related knowledge, skills, and experience. The actual offer will be based on the individual candidate. The range provided may represent a candidate range and may not reflect the full range for an individual tenured employee. This role may be eligible for variable compensation and/or equity. We offer a competitive benefits package, including flexible time off, a comprehensive well-being program with two paid Wellbeing Days and two paid Volunteer Days per year, plus a three-week Work from Anywhere option.\nBase Pay Ranges:\nSF Bay Area, New York City Metro Area:\nBase Pay Range: 200,300.00 - 293,810.00 USDCalifornia (excludes SF Bay Area), Colorado, Connecticut, Illinois, Washington DC Metro, Maryland, Massachusetts, New Jersey, Texas, Washington, Virginia, and Alaska:\nBase Pay Range: 167,300.00 - 245,355.00 USDAll other cities and states excluding those listed above:\nBase Pay Range: 152,900.00 - 224,235.00 USD","description_format":"text","description_chars":7246,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Equity","Flexible schedule","Flexible time off"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Information Security","Email Security","Cybersecurity AI"],"lifecycle":[{"event":"open","at":"2026-09-24T21:04:32Z"}],"liveness":{"score":63,"band":"ok","label":"Likely open","p_open":1,"p_active":0.632,"p_room":1,"age_days":1,"expected_fill_days":34,"reasons":["conf:11","stale_co","velocity","win:early","comp:brand"],"computed_at":"2026-09-26T05:45:00Z"},"pay":{"stated_usd_annual":293810,"is_top_pay":true},"html_url":"https://alion.io/job/proofpoint-senior-research-applied-ai-engineer","json_url":"https://alion.io/job/proofpoint-senior-research-applied-ai-engineer.json","meta":{"generated_at":"2026-09-27T05:19:38Z","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":4666,"day_limit":5000,"remaining_today":334,"minute_limit":60,"resets_at":"2026-09-28T00:00:00Z"}}}