Senior Machine Learning Engineer, Stripe Assistant at Stripe

Who we areAbout StripeStripe is a financial infrastructure platform for businesses. Millions of companiesfrom the worlds largest enterprises to the most ambitious startupsuse Stripe to accept payments grow their revenue and accelerate new business opportunities. Our mission is to increase the GDP of the internet and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyones reach while doing the most important work of your career.About the teamThe Stripe Assistant team is transforming how users interact with Stripe by building an intelligent and proactive assistant that not only answers users queries but efficiently resolves issues and provides valuable business insights. We leverage LLMs and agentic systems to elevate the user experience across Stripefrom the dashboard to support surfacesand we enable other teams to build and integrate their AI agents on our platform. Were evolving from a helpful support tool to a trusted pilot that anticipates optimizes and executes on behalf of our users.What youll doAs a Staff Machine Learning Engineer on the Stripe Assistant team youll own the end-to-end ML and agent architecture that makes Stripe Assistant safe reliable and deeply useful. Youll set the strategy for how the Assistant executes high-trust actions delivers accurate analytical answers across Stripe and the broader web orchestrates capabilities across many tools and agents and grounds responses in authoritative Stripe and user dataso users can resolve issues quickly and confidently.Youll drive conversation continuity and personalization across surfaces evolve the Assistant into a proactive partner that anticipates user needs and deepen its presence in the dashboard to streamline critical workflows. Youll establish rigorous evaluation and SLOs and deliver stepchange improvements in quality latency cost and availabilitypaving the way for configurable levels of autonomy and ultimately a dependable operating layer over a merchants Stripe account.ResponsibilitiesOur team operates fluidly and here are some problems you may tackle:Establish trustworthy human-in-the-loop execution for high-trust write actionsprioritizing user control transparency accountability and auditability so customers can delegate with confidence.Define and evolve the Assistants capability and governance model across hundreds of tools and agents balancing power permissions and consistency at scale.Raise answer quality and usefulness by grounding in authoritative Stripe knowledge and live user data building cross-surface memory and personalization and making the Assistant proactive and present in the dashboard.Explore and apply optimal machine learning methods to improve Stripe Assistants overall performance including but not limited to fine-tuning LLMs with RLHF synthetic data generation optimizing RAG pipelines via domainspecific embedding and retriever finetuning and automatic prompt tuning etc.Make quality and reliability a product: set and meet SLOs build rigorous evaluation and benchmarking loops and drive sustained improvements in latency cost and availability.Lead as a tech lead: mentor and grow engineers uphold high bars for code quality security observability and operational rigor and align crossfunctionally to ship safely and fast.Who you areWere looking for someone who meets the minimum requirements to be considered for the role. If you meet these requirements you are encouraged to apply. The preferred qualifications are a bonus not a requirement.Minimum requirements8 years in AI/ML and backend engineering (4 years building and operating production ML systems) with technical leadership.Deep and up-to-date applied LLM experience: RAG/embeddings tool use/function calling agentic planning/orchestration fine-tuning code generation evaluations etc.Proficient in Python (Ruby is a plus); strong distributed systems fundamentals.Experience working closely with product management design other engineers and other cross-functional partners.Preferred qualificationsExperience operating ML systems at global scale with stringent SLOsbalancing reliability latency and costwith privacy security and compliance by design.Experience building products where AI/ML is core; as well as balancing short-term product priorities with long-term AI/ML improvements.Track record building ML platforms especially those that enable multiple teams to collaborate together.Strong technical leadership and communication: mentoring and elevating engineers elevating AI/ML awareness and posture within organizations setting architectural direction and driving alignment in ambiguity.Join us to build a trustworthy proactive AI operating layer for every Stripe merchantadvancing safety reliability and insight at global scale. If youre ready to help take Stripe Assistant from copilot to full autopilot and shape how businesses connect with Stripe wed love to hear from you.Required Experience:Senior IC Key Skills Industrial Maintenance,Machining,Mechanical Knowledge,CNC,Precision Measuring Instruments,Schematics,Maintenance,Hydraulics,Plastics Injection Molding,Programmable Logic Controllers,Manufacturing,Troubleshooting Employment Type : Full Time Experience: years Vacancy: 1