Senior Machine Learning Engineer, Alexa-Conv A Modeling&Learning

Amazon.com Services LLC•5h ago

United StatesOnsiteFull-timeSenior Level5+ yrs exp

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Ml EngineerSenior Ml EngineerRl EngineerDeep Learning Engineer

Alexa AI is building the next generation of Alexa+, Amazon's LLM-powered conversational assistant
its future is agentic: LLM systems that reason and act over dozens of chained inferences, coupled to real environments where their actions persist. Making these agents smarter, faster
cheaper is as much a systems problem as a modeling problem - agent performance depends on the model, the harness, the evaluation infrastructure
the serving stack co-designed together. We are looking for a Senior Machine Learning Engineer to build and own core systems in this agentic platform. You will take one of its foundational areas - agentic evaluation infrastructure, reinforcement learning training systems, self-learning pipelines
agentic inference serving - and own it end to end: the design, the implementation, the operational bar
the interfaces that scientists and partner teams build on. You will work directly with applied scientists, work backwards from committed product launches
turn research prototypes into infrastructure that runs unattended at scale. The work is concrete. Agents are evaluated in sandboxed, recreatable environments at hundreds of concurrent trials
every source of infrastructure noise you remove is a model decision the organization can trust. They are trained on long-horizon multi-turn trajectories where the rollout and learner engines have to agree token for token. They are served under latency budgets measured in hundreds of milliseconds. And they improve week over week only if the pipeline that turns production experience into training data actually holds. You will own a piece of that loop, make it reliable
make it fast. This is a platform role with room to grow. The systems you own serve every Alexa agent program rather than a single product
the engineer who makes them dependable becomes the person the organization routes its hardest cross-system problems to. Key job responsibilities Design, build
operate major components of the agentic AI platform: evaluation harnesses, sandboxed environments and mocked resources, RL and post-training pipelines, self-learning data pipelines
inference serving for agentic traffic Lead the design work in your area: write the design documents, drive them through review
make the build-versus-adopt calls within your scope Own reliability and performance: instrument your systems, drive down the failure modes that make results untrustworthy (process management, resource contention, unreliable external calls)
report platform health in metrics rather than anecdotes Partner with applied scientists to turn research code into production infrastructure
expose it through interfaces other teams can use without your involvement Scale what you build: hundreds of concurrent evaluation trials, long-context multi-turn training jobs
large GPU formations on shared company infrastructure Raise the engineering bar through code and design reviews, operational excellence practices
deep dives on cross-system problems Mentor engineers earlier in their careers and help set technical direction for your team A day in the life You might spend the morning making the evaluation platform reproducible under high concurrency, tracking down why scores drift when a hundred trials share a host, midday pairing with a scientist to get a long-context training job to converge identically across the rollout and learner engines
the afternoon in a design review deciding how environment snapshots should be versioned and served to partner teams. You work daily with applied scientists and other engineers
your systems are the reason their results are trustworthy and shippable. About the team Our organization owns the applied science and platform engineering for Alexa's agentic experiences. We operate at the intersection of large language models, reinforcement learning with verifiable rewards, agentic architectures
large-scale distributed systems, serving customers across dozens of languages and device types. Our platform provides the shared evaluation, training, self-learning
serving foundation for Alexa's flagship agent programs and the broader agent portfolio behind them.
5+ years of non-internship professional software development experience - 5+ years of programming with at least one software programming language experience - 5+ years of leading design or architecture (design patterns, reliability and scaling) of new and existing systems experience - Experience as a mentor, tech lead or leading an engineering team
5+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing
operations experience - Bachelor's degree in computer science or equivalent Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability
other legally protected status. Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner. The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications
location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off
parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits . USA, WA, Bellevue - 168,100.00 - 227,400.00 USD annually

Required skills

LLMDistributed Systems