Machine Learning Engineer - Persana AI
at Persana AI — Sales Agents with 100+ data sources to close more deals
What the role involves
Machine Learning Engineer - Persana AI
About Persana
Persana AI (YC W23) is revolutionizing how companies execute their go-to-market strategies with our innovative GTM agents. Our proprietary AI technology analyzes billions of data points across professionals, companies, and market signals to help sales teams identify high-probability prospects, engage the right decision-makers, and create personalized outreach that gets responses. Companies using our platform see 3-5x higher conversion rates while their sales teams spend 70% less time on prospecting.
The Opportunity
We're seeking an exceptional Machine Learning Engineer to join our AI team and help advance our agent-based technology. In this role, you'll work on developing and optimizing the core ML systems that power our GTM agents, focusing on embedding models, retrieval systems, and large language model applications. This is a unique opportunity to apply cutting-edge AI techniques to solve real business problems at scale.
What You'll Build
Advanced embedding models that capture the semantic relationships between companies, people, and roles
Sophisticated retrieval augmented generation (RAG) systems to ground our agents in factual data
Fine-tuned language models for industry-specific tasks like prospect qualification and outreach generation
Evaluation frameworks to measure and improve agent performance across multiple dimensions
Production ML pipelines that can efficiently process and learn from billions of data points
Your Impact
Shape the core AI technology that differentiates Persana in the market
Develop novel approaches to improve agent reliability and reduce hallucinations
Build systems that deliver measurable business value to our customers
Collaborate with product and engineering to bring ML innovations into production
Help define the future of AI-powered go-to-market execution
What We're Looking For
3+ years of professional experience in machine learning engineering
Strong background in NLP, vector embeddings, and large language models
Experience with PyTorch, Hugging Face, or similar ML frameworks
Proficiency in Python and software engineering best practices
Understanding of production ML systems and the challenges of deploying models at scale
Knowledge of search and retrieval systems (vector databases, semantic search)
Track record of solving complex problems with ML approaches
Bonus Points For
Experience with embedding models like BERT, Sentence Transformers, or OpenAI embeddings
Background in agent-based AI systems or autonomous workflows
Familiarity with LLM fine-tuning techniques (RLHF, LoRA, QLoRA)
Knowledge of information extraction from unstructured data
Experience with B2B data or sales tech applications
Contributions to research papers or open-source ML projects
Why Persana?
Work with a founding team that combines domain expertise from LinkedIn, Shopify, and Element AI
Solve challenging technical problems at the intersection of AI, search, and B2B sales
Join at an inflection point - we're well-funded and scaling rapidly
Competitive compensation
Flexible work environment with the resources you need to do your best work
Our Stack
ML/AI: PyTorch, Hugging Face Transformers, LangChain
Data Processing: Python, Pandas, NumPy
Search: OpenSearch, FAISS, Pinecone
Backend: Node.js, Python, BullMQ for job queueing
Infrastructure: AWS (SageMaker, Lambda, ECS), Docker
About Persana AI
Persana AI | The Agent Layer for Modern GTM Teams AI Superpowered Sales & GTM Intelligence — built on autonomous agents AI agents that research, enrich, and engage your best prospects — autonomously, not just automated. The Shift from Tools to Agents: Your GTM stack is fragmented. Multiple enrichment providers. Workflow tools with hard limits. Manual triggers. Disconnected data. Persana consolidates it all into one agentic platform that thinks, learns, and executes — 24/7. What Persana Does: 🔍 Multi-Source Intelligence – 100+ data sources tracking funding, hiring, tech changes, real-time intent signals, waterfall data for finding emails, phone numbers and more 🤖 Autonomous Execution – Run complex workflows across 100K+ prospects without manual triggers or platform limits 🧠 Continuous Learning – AI that adapts based on what actually converts to pipeline, not predefined rules ⚡ Native CRM Integration – Bi-directional sync with Salesforce, HubSpot, and your entire GTM stack Why Teams Choose Persana: Replace fragmented point solutions with one autonomous platform - Break free from workflow ceilings and platform constraints - Access comprehensive signal intelligence across all major data sources - Scale prospecting without adding headcount Results Customers See: ✓ 95% increase in qualified pipeline ✓ 65% faster sales cycles ✓ 3+ weeks per month reclaimed from manual work ✓ 30% higher conversion rates The Technology: Trained on 700M+ contacts and 200M+ companies, and 100+ data sources. Multi-agent architecture combining research, enrichment, and execution. Proprietary embeddings fine-tuned for GTM use cases. The Team: Built by LinkedIn engineering veterans who scaled systems to billions of users. Backed by Y Combinator, Dharmesh Shah, Race Capital, and Stage 2 Capital. 🚀 Join 15,000+ GTM professionals using agents to boost their revenue → persana.ai
Full Persana AI profile