Amazon

Principal Applied Scientist, Humorphic Labs

Amazon$198K — $269K *
Consumer Technology
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • PhD or Master's in computer science, machine learning, AI, or related field with equivalent applied experience.
  • Experience in developing agentic AI systems or large language models through complete product cycles.
  • Proven experience designing evaluations for systems lacking standard benchmarks.
  • Strong background in writing substantial research or production code in Python or similar languages.
  • Demonstrated ability to lead complex scientific projects across engineering and product partnerships.

Responsibilities

  • Own the scientific strategy for human-AI collaboration.
  • Convert interaction behavior goals into testable hypotheses and evaluation tasks.
  • Build evaluation systems to measure team behavior and trust in AI.
  • Design and test agent systems integrating memory, tools, and planning.
  • Curate data collection methods for language, speech, and interaction traces.
  • Diagnose failures in data, models, and product interactions.
  • Run experiments and report results to partner product teams.

Benefits

  • Comprehensive health insurance (medical, dental, vision) including mental health support.
  • 401(k) matching and retirement planning support.
  • Generous paid time off and parental leave policies.
  • Flexible Spending Accounts and Adoption assistance options.
Full Job Description
You will own the scientific agenda. You will convert a fuzzy behavioral goal into an end-to-end plan that covers data, agent architecture, evaluation, and the product experiment that tests it. You will write code every week and build large parts of the experimental stack yourself, because it does not exist yet.

The first focus areas are agentic products where a domain expert holds judgment the system cannot replace. Amazon Connect places an assistant beside a person handling a live conversation. AWS Bio Discovery places one beside a scientist running experiments. Both need evaluation that measures collaboration quality rather than task completion alone.

The role changes shape as the Lab matures. It starts as hands-on science in close partnership with product and engineering. Later it moves inside a product team to carry adoption of what the Lab proved.

Key job responsibilities

- Own the scientific strategy for human-AI collaboration across agentic and multimodal systems.

- Convert desired interaction behaviors into falsifiable hypotheses, evaluation tasks, and system requirements.

- Build the evaluation system that measures teammate behavior, trust, adaptation, human contribution, and failure recovery.

- Design agent systems that use memory, tools, planning, and recovery, then test them with the people who do the work.

- Design data collection and curation for language, speech, and interaction traces.

- Build significant parts of the experimental stack yourself, because that stack does not exist yet.

- Diagnose failures across data, models, orchestration, evaluation, and product interaction.

- Define the requirements engineering needs to turn a proven method into a product capability.

- Partner with design, product, engineering, and behavioral research from problem definition through product validation.

- Run experiments with partner product teams, then report what worked, what failed, and what changed as a result.

- Set the standard for reproducible experiments, evidence, and scientific review inside the Lab.

- Mentor scientists and engineers without moving away from hands-on work.

- Represent the work in internal reviews and in appropriate external scientific venues.

A day in the life

Your week has two centers of gravity.

Most days you build. You take a claim about how a teammate should behave, design the smallest experiment that can falsify it, and run it. You read interaction traces from real sessions, then argue with the engineers about what they mean.

The rest of the week belongs to the people the work is for. You sit with a contact center agent or a bench scientist and watch where the system helps and where it intrudes. You leave with the next hypothesis. Often you leave with evidence that kills the last one.

About the team

The Lab is a lead who still writes code, an Applied Scientist, and engineers. Applied AI Solutions leadership approved it with one instruction, to explore the limits of what we can build, and one number, to ship six or more months ahead of anyone else.

You own the agenda, the hypotheses, and the evaluation. The engineers build the systems that test them, then the products that carry the ones that survive. Neither seat hands work over a wall.

We have a sunset clause. Once a capability is proven and integrated into its product, the Lab moves to the next frontier.

BASIC QUALIFICATIONS

- PhD in computer science, machine learning, artificial intelligence, or a related technical field, or a Master's degree with equivalent applied science experience, or an equivalent body of work

- Experience developing agentic AI systems or large language model applications through an end-to-end product cycle

- Experience designing evaluation for systems that have no standard benchmark

- Experience writing substantial research or production code in Python or a comparable language

- Experience leading complex scientific work across engineering and product partners

- Evidence of independent decisions in ambiguous, consequential technical environments

PREFERRED QUALIFICATIONS

- Experience with post-training methods, including supervised fine-tuning and reinforcement learning

- Experience with multimodal models across language, speech, and vision

- Experience with speech systems or real-time conversational systems

- Experience measuring collaboration quality, trust, adaptation, or human contribution in AI systems

- Experience building agent systems that use memory, tools, planning, and recovery mechanisms

- Experience founding a scientific program, or joining an early team before that team had established its methods

- A record of scientific influence through publications, patents, open-source work, or deployed systems

- Experience mentoring senior scientists and engineers without moving away from hands-on work

- Experience partnering with design, product, and behavioral research from problem definition through product validation

- Experience taking a proven method into a product team and staying until that team adopted it

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, and 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, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits.

USA, TX, Austin - 198,900.00 - 269,000.00 USD annually

About Amazon

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Amazon Careers

Joining Amazon presents an unparalleled opportunity to become part of a vibrant team pushing the boundaries of innovation and growth in the global marketplace. As a leader in e-commerce, technology, and logistics, Amazon offers a variety of job opportunities that cater to a range of skills and professional interests. Work You’ll Do At Amazon, every day is an opportunity to collaborate with the brightest minds in technology and business to redefine what’s possible. Whether you’re interested in software development, marketing, human resources, or customer service, Amazon has a position waiting for you. Transform the way the world shops and innovates with our diverse and inclusive team. Amazon is not just a company; it’s a community where you can drive real change and contribute to projects impacting millions globally. Lead with Innovation and Leadership Amazon is the perfect place to enhance your leadership and innovation skills. Our culture encourages pushing the envelope and imagining the unimaginable. Here, you will lead projects that challenge the status quo and define new industry standards. Work with a team that values diversity and is committed to creating an inclusive environment. Our leadership is focused on harnessing the collective power of unique perspectives to foster growth and innovation. Explore Amazon’s Employment Benefits Amazon’s commitment to its employees extends beyond just career growth. We offer competitive benefits, including health care, parental leave, and diversity training, ensuring that our team not only excels professionally but also enjoys well-being and security. Internship and Networking Opportunities Start your career with an Amazon internship and gain hands-on experience that matters. Our internships provide a gateway to full-time employment and an opportunity to network with professionals across various sectors of the company. Future-Proof Your Career With Amazon, your career path is filled with numerous opportunities for advancement. Our learning and development programs are designed to nurture your professional growth and keep you at the forefront of industry trends. Stay Connected Join Our Team Discover the job opportunities at Amazon that match your skills and interests. We are constantly on the lookout for passionate, curious, and innovative team players ready to make a difference. Keep Up to Date Stay ahead with career tips, insider perspectives, and industry-leading insights you can put to use today—all from the people who work here. Job Alert Emails Customize your subscription to receive job alerts, the latest news, and insider tips tailored to your preferences. Explore the exciting and rewarding career opportunities that await at Amazon. Amazon is more than just a company—it’s a platform for building a promising future. Whether you’re starting or looking to advance your career, Amazon offers the resources, support, and network you need to succeed. Join us, and be a part of our continuing mission to be Earth's most customer-centric company.
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