Senior Machine Learning Engineer

Unchain Data; Menlo Park (CA); On-site; USD 133,952 - 245,000; Full time

Benefits offered by this job

Performance bonuses

Equity ownership

100% health insurance for employees

Flexible benefits spending account

Catered meals and events

Job summary

Unchain Data is seeking a Senior Machine Learning Engineer in Menlo Park, CA. In this influential role, you will develop AI inference services, fine-tune models, and optimize workflows using cutting-edge methodologies. The position requires a strong background in AI and machine learning, with a focus on impactful projects that drive innovation.

We offer performance-driven compensation, exceptional benefits, and a collaborative office experience designed to support high-performing teams.

Qualifications

• 3 years experience in AI or Machine Learning roles.
• Experience with production-grade ML frameworks.
• Background in scalable data pipelines and large datasets.

Responsibilities

• Fine-tune and develop AI inference services for products.
• Optimize workflows using reinforcement learning.
• Productionize fine-tuned models for business use cases.

Skills

Machine learning systems design

Data pipeline implementation

Large language model fine-tuning

Inference system development

Retrieval-augmented generation engineering

Production-ready microservices creation

Automated AI evaluation frameworks

Education

Bachelor's degree in Computer Science or related field

Job description

Join us in building the future of finance.

Our mission is to democratize finance for all. An estimated $124 trillion of assets will be inherited by younger generations in the next two decades. The largest transfer of wealth in human history. If you’re ready to be at the epicenter of this historic cultural and financial shift, keep reading.

About the team + role

We are building an elite team, applying frontier technologies to the world’s biggest financial problems. We’re looking for bold thinkers. Sharp problem-solvers. Builders who are wired to make an impact. Robinhood isn’t a place for complacency, it’s where ambitious people do the best work of their careers. We’re a high-performing, fast-moving team with ethics at the center of everything we do. Expectations are high, and so are the rewards. We're looking for an exceptional Senior Machine Learning Engineer to help shape the future of our core platforms, products, and customer experiences. FinTech is one of the most complex and rapidly evolving spaces in technology, and the challenges we're tackling require deep innovation, critical thinking, and scale that don't always have strong precedents.

You’ll take on a highly influential role shaping vision and execution across key strategic initiatives. You’ll partner with cross‑functional leaders, contribute to high‑impact decisions, guide complex projects from concept to completion, and mentor others on the team. This is a role for someone who leverages modern tools and cutting‑edge methodologies as a core part of how they solve problems, and raises the bar for everyone around them.

This role is based in our Menlo Park, CA, with in‑person attendance expected at least three days per week.

At Robinhood, we believe in the power of in‑person work to accelerate progress, spark innovation, and strengthen community. Our office experience is intentional, energizing, and designed to fully support high‑performing teams.

What you’ll do

Fine tuning, product use cases, developing AI inference services for product use cases. Optimization of agentic workflows through finetuning and reinforced learning. Improving evaluation and training or finetune models for product use cases. Working with platform tooling team to productionize fine‑tuned models for customer use cases. Telecommuting Permitted.

What you bring

• Bachelor's degree or foreign equivalent in Computer Science or related field and three years (3) of experience in AI, Machine learning, job offered or related occupation.
• Education and/or experience must include 3 years of experience with each of the following skills is required:
  • Designing and deploying machine learning systems using production‑grade frameworks for training, optimization, and service integration.
  • Implementing scalable data pipelines using distributed compute frameworks to process, validate, and version large datasets.
  • Building and fine‑tuning large language models using techniques such as LoRA, RLHF, retrieval augmentation, and prompt optimization.
  • Developing high‑performance inference systems by applying quantization, pruning, distillation, and hardware‑aware optimization.
  • Engineering retrieval‑augmented generation pipelines with vector indexes, embedding workflows, and document‑chunking strategies.
  • Authored production‑ready microservices that expose model inference endpoints with robust API design, containerization, and orchestration.
  • Constructing automated AI evaluation frameworks including metric suites, safety checks, hallucination detection, and regression testing.
• Background checks required

What we offer

• Challenging, high‑impact work to grow your career
• Performance driven compensation with multipliers for outsized impact, bonus programs, equity ownership, and 401(k) matching
• Best in class benefits to fuel your work, including 100% paid health insurance for employees with 90% coverage for dependents
• Lifestyle wallet – a highly flexible benefits spending account for wellness, learning, and more
• Employer‑paid life & disability insurance, fertility benefits, and mental health benefits
• Time off to recharge including company holidays, paid time off, sick time, parental leave, and more!
• Exceptional office experience with catered meals, events, and comfortable workspaces.

In addition to the base pay range listed below, this role is also eligible for bonus opportunities + equity + benefits.

Base pay for the successful applicant will depend on a variety of job‑related factors, which may include education, training, experience, location, business needs, or market demands. The expected base pay range for this role is based on the location where the work will be performed and is aligned to the corresponding compensation zone.

Base Pay Range:

$133,952 – $245,000 per year

Robinhood provides equal opportunity for all applicants, offers reasonable accommodations upon request, and complies with applicable equal employment and privacy laws. Inclusion is built into how we hire and work—welcoming different backgrounds, perspectives, and experiences so everyone can do their best. Please review the Privacy Policy for your country of application.