Sr. Engineer, Machine Learning

Job Summary
:
Poshmark is the leading fashion marketplace where style comes alive through discovery, self-expression, and human connection. The Machine Learning team is tasked with building a world-class machine learning platform to derive value from data, supporting various business aspects such as search and personalization.

Responsibilities
:

• Manage the entire ML lifecycle from data collection to deployment and monitoring

• Collaborate across teams such as DS, QA, Infra and other engineering teams to product ionize ML models

• Write and optimize code for production environments, ensuring the robustness and reliability of ML services at scale

• Manage and support current solutions while evolving them to incorporate newer technologies

• Strong written, verbal, and presentation skills, with the ability to convey complex concepts in a clear and simple manner

• Stay updated with the latest developments in data science and machine learning

Qualifications
:
Required
:

• 4+ years of experience applying Machine Learning to concrete problems at large scale

• Bachelors or Masters in Computer Science, Statistics, or related field

• Strong CS fundamentals. Should be able to write algorithms with ease.

• Solid understanding of Data Science and ML fundamentals – Regression, Classification, Tree-based approach, Neural network, and sequence-based models.

• Working experience with at least one ML model: LLMs, GNN, Deep Learning, Logistic Regression, Gradient Boosting trees, etc.

• Should have excellent understanding of ML lifecycle

• Good understanding of system architecture. Have knowledge of big data technologies – streaming architecture, data pipelines, etc.

• Experience with Python, SQL, Java or Scala

• Manage the entire ML lifecycle from data collection to deployment and monitoring

• Collaborate across teams such as DS, QA, Infra and other engineering teams to product ionize ML models

• Write and optimize code for production environments, ensuring the robustness and reliability of ML services at scale

• Manage and support current solutions while evolving them to incorporate newer technologies

• Strong written, verbal, and presentation skills, with the ability to convey complex concepts in a clear and simple manner

• Stay updated with the latest developments in data science and machine learning

Preferred
:

• Big data systems – Spark, EMR, S3, Air Flow

• Production experience with LLMs and prompt engineering

• Experience with Flask, FastAPI, Rabbit

MQ, Embeddings and Vector DBs

Company
:
Poshmark is a social marketplace for fashion where anyone can buy, sell, and share their style with others. Founded in 2011, the company is headquartered in Redwood City, USA, with a team of 501-1000 employees. The company is currently Late Stage.