Machine Learning Engineer

EarnIn; Mountain View (CA); Hybrid; USD 187,000 - 229,000; Full time

Job summary

EarnIn, a pioneer in earned wage access, seeks a Machine Learning Engineer for its AI/ML platform team in Mountain View. You will train, deploy, and evaluate models powering financial products and agentic workflows. This role is hybrid, requiring in‑office work 2 days a week.

Responsibilities include building ML models on large financial data, creating data pipelines, and productionizing models with scalable APIs and observability.

Qualifications

• Bachelor's or Master's degree in Computer Science, Engineering, Statistics, or a related field, or equivalent experience
• 2+ years of industry experience building and shipping ML systems.
• Strong Python and hands-on experience with PyTorch and the standard ML stack (NumPy, pandas, scikit‑learn).

Responsibilities

• Develop and train ML models on large-scale financial and behavioral data.
• Build feature and data pipelines turning raw event data into training‑ready datasets.
• Design offline and online evaluation, backtests, A/B tests, and regression suites.
• Take models to production; manage serving, latency, cost, retraining loops, and drift monitoring.
• Fine‑tune and adapt LLMs; manage prompting, memory, retrieval, and tool integrations.
• Build backend services and RESTful APIs exposing models to internal tools.
• Instrument pipelines for observability with logging and tracing.
• Collaborate cross‑functionally with ML engineers, data scientists, and product teams.

Skills

Python programming

Clear communication

Collaborative mindset

Education

Bachelor's or Master's degree in CS/Engineering/Statistics or related

Tools

PyTorch

NumPy

pandas

scikit-learn

Spark

Databricks

LLM APIs

OpenAI/Claude workflows

Job description

As one of the first pioneers of earned wage access, our passion at EarnIn is building products that deliver real-time financial flexibility for those with the unique needs of living paycheck to paycheck. Our community members access their earnings as they earn them, with options to spend, save, and grow their money without mandatory fees, interest rates, or credit checks.

We’re fortunate to have an incredibly experienced leadership team, combined with world‑class funding partners like A16Z, Matrix Partners, DST, Ribbit Capital, and a very healthy core business with a tremendous runway. We’re growing fast and are excited to continue bringing world‑class talent onboard to help shape the next chapter of our growth journey.

POSITION SUMMARY

We're seeking a Machine Learning Engineer to join our AI/ML platform team. You'll train, deploy, and evaluate models that power user‑facing financial products — from predictive models over transaction and behavioral data to agentic applications built on large language models. Your work will support EarnIn's mission to provide fair and intelligent financial tools to millions of users.

The base salary range for this full‑time position is $187,000–$229,000, plus equity and benefits. Our salary ranges are determined by role, level, and location. This is a hybrid position in Mountain View (Headquarters) and will require in‑office work 2 days a week.

WHAT YOU'LL DO

• Develop and train ML models — including sequence, embedding, and classification models — on large‑scale financial and behavioral data.
• Build feature and data pipelines that turn raw event data into training‑ready datasets, and keep training and serving features consistent.
• Design offline and online evaluation for models and agentic workflows: success metrics, backtests, A/B tests, error tracing, and regression suites.
• Take models to production and own them there — serving infrastructure, latency and cost tuning, retraining loops, and monitoring for drift and performance degradation.
• Fine‑tune and adapt LLMs for internal use cases, and build the orchestration around them: prompting, memory and context pipelines, retrieval, and tool integrations.
• Build backend services and RESTful APIs in Python that expose models and agentic applications to internal tools and product surfaces.
• Instrument pipelines for observability — logging, tracing, and distributed monitoring across model and agent workflows.
• Collaborate cross‑functionally with ML engineers, data scientists, and product to shape intelligent and safe AI features.

WHAT WE'RE LOOKING FOR

• Bachelor's or Master's degree in Computer Science, Engineering, Statistics, or a related field, or equivalent experience
• 2+ years of industry experience building and shipping ML systems.
• Strong Python and hands‑on experience with PyTorch and the standard ML stack (NumPy, pandas, scikit‑learn).
• Experience using AI‑assisted development tools (e.g., GitHub Copilot, Cursor, ChatGPT, or similar tools) as part of your software development workflow
• Solid grounding in ML fundamentals: model architecture choices, training dynamics, regularization, and how to diagnose a model that isn't learning
• Experience with large‑scale data processing (Spark, Databricks, or similar) and feature engineering on production data.
• Experience designing evaluation for ML systems and LLM behavior — metrics, automated checks, offline test harnesses, and behavioral regression suites
• Working knowledge of LLM APIs (e.g., OpenAI, Claude), prompt engineering, and at least one agentic framework or custom equivalent.
• Experience with API design, async workflows, and production database usage (SQL or NoSQL).
• Clear communication and a collaborative mindset.
• Experience with LLM fine‑tuning using frameworks such as Unsloth, Axolotl, LLaMA‑Factory, or HuggingFace PEFT/TRL, including parameter‑efficient methods (LoRA/QLoRA) is a plus
• Experience with distributed training or representation learning is a plus.
• Familiarity with MLOps tooling for experiment tracking, feature stores, or model registries (MLflow, Weights & Biases, Feast) is a plus.
• Familiarity with vector stores (e.g., Weaviate, Pinecone, Qdrant) is a plus
• Knowledge of OpenTelemetry or similar observability frameworks is a plus
• Exposure to container‑based deployment or serverless environments (Docker, AWS Lambda, etc.).
• Background in fintech, fraud, risk, or credit modeling is a plus

At EarnIn, we believe that the best way to build a financial system that works for everyday people is by hiring a team that represents our diverse community. Our team is diverse not only in background and experience but also in perspective. We celebrate our diversity and strive to create a culture of belonging. EarnIn does not unlawfully discriminate based on race, color, religion, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, legally protected medical condition, family care status, military or veteran status, marital status, registered domestic partner status, sexual orientation, genetic information, or any other basis protected by local, state, or federal laws. EarnIn is an E‑Verify participant.

EarnIn does not accept unsolicited resumes from individual recruiters or third‑party recruiting agencies in response to job postings. No fee will be paid to third parties who submit unsolicited candidates directly to our hiring managers or HR team.