Staff ML Engineer, Apollo

New

Skills

Airflow Databricks Engineer Machine Learning Python Pytorch SaaS Scikit-learn TensorFlow

Apollo.io is a leader in go-to-market platforms, empowering revenue teams worldwide with robust B2B contact data and intelligent sales tools. As a Staff Machine Learning Engineer on our Intelligence team, you will spearhead AI-first initiatives that shape the future of our platform. You'll collaborate with cross-functional teams to deliver scalable ML solutions that power search, recommendations, content generation, and more. This is a unique opportunity to lead impactful projects at one of the fastest-growing SaaS companies and elevate our AI-driven user experiences.

Key Responsibilities
  • Design, build, evaluate, and deploy scalable machine learning systems for production environments.
  • Drive end-to-end ML initiatives, including problem definition, data exploration, modeling, and monitoring.
  • Lead development of intelligent features powered by LLMs, embeddings, ranking models, and semantic search.
  • Guide architectural decisions and contribute to foundational ML infrastructure such as feature stores and MLOps.
  • Collaborate cross-functionally to define and iterate on AI-first product experiences.
  • Mentor and elevate engineers across the organization, influencing engineering best practices.
  • Champion internal use of AI to enhance engineering and operational efficiency.
Required Skills & Qualifications
  • 8+ years of experience deploying machine learning systems in production.
  • Expertise in LLMs and embeddings, including fine-tuning, prompt engineering, and vector databases.
  • Proficiency in Python and modern ML libraries (e.g., PyTorch, TensorFlow, HuggingFace, Scikit-learn).
  • Experience with cloud infrastructure (GCP), orchestration tools (Airflow), and experimentation platforms (mlflow, Databricks).
  • Strong collaboration and communication skills; ability to influence across teams.
  • Proven track record in shipping ML-driven features for B2B SaaS or enterprise platforms.
  • Bachelor's, Master's, or PhD in Computer Science, Mathematics, Statistics, or a related quantitative field, or equivalent experience.
  • Experience with retrieval-augmented generation (RAG), large-scale search, or recommendation systems is a plus.
  • Exposure to GTM, marketing technology, or sales enablement domains in B2B settings is preferred.

Job Type: Remote

Salary: Not Disclosed

Experience: Entry

Duration: 12 Months

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