Apollo.io is the AI-native GTM platform used by millions of professionals worldwide, helping revenue teams automate workflows, personalize outreach, and convert prospects into customers. Backed by Sequoia and Bain Capital and valued at $1.6B+, Apollo is one of the fastest-growing SaaS companies in the world, shipping AI-first capabilities across assistants, agentic automation, search, and generation at massive scale.

We are entering a hyper-growth phase of AI innovation and are hiring a Director of AI Engineering to lead the strategy, engineering execution, and cross-functional integration of Apollo’s applied AI systems.

Your Role & Mission

As the Director of AI Engineering, you will own the end-to-end delivery of Apollo’s AI roadmap spanning autonomous agentic systems, LLM-powered workflows, search & relevance, personalization, and production-grade ML infrastructure. You will lead and scale a high-impact AI Engineering organization responsible for turning cutting-edge AI techniques into real, revenue-driving product capabilities used by millions.

This role sits at the intersection of Engineering, Product, Machine Learning, Growth, and GTM, requiring deep technical leadership, exceptional product intuition, and a track record of shipping AI systems that create measurable business outcomes.

You will define the long-term architecture for agentic AI at Apollo, elevate engineering excellence, mentor senior ICs and managers, and accelerate Apollo’s position as the AI-native leader in the go-to-market ecosystem.

What You’ll Own & Deliver

AI Systems Strategy & Roadmap

• Define the multi-year technical vision for Apollo’s AI stack, spanning agents, orchestration, inference, retrieval, and platformization.
  
  
• Prioritize high-impact AI investments by partnering with Product, Design, Research, and Data leaders to align engineering outcomes with business goals.
  
  
• Establish technical standards, evaluation criteria, and success metrics for every AI-powered feature shipped.
  
  

Agentic Systems & Applied AI Delivery

• Lead the architecture and deployment of long-horizon autonomous agents, multi-agent workflows, and API-driven orchestration frameworks.
  
  
• Build reusable, scalable agentic components that power GTM workflows like research, enrichment, sequencing, lead scoring, routing, and personalization.
  
  
• Own the evolution of Apollo’s internal LLM platform for high-scale, low-latency, cost-optimized inference.
  
  

AI Assistants, Search & Personalization

• Oversee model-driven experiences for natural-language interfaces, RAG pipelines, semantic search, personalized recommendations, and email intelligence.
  
  
• Partner with Product & Design to build intuitive conversational UX that hides underlying complexity while elevating user productivity.
  
  

Experimentation, Evaluation & Observability

• Implement rigorous evaluation frameworks, including offline benchmarking, human-in-the-loop review, and online A/B experimentation.
  
  
• Ensure robust observability, monitoring, and safety guardrails for all AI systems in production.
  
  
• Drive continuous model improvement through telemetry, feedback loops, and data-driven performance tuning.
  
  

Technical Leadership & Team Building

• Build and lead a world-class AI Engineering team of senior ICs, managers, and cross-functional collaborators.
  
  
• Foster a culture of experimentation, velocity, and pragmatic engineering, where speed and safety coexist.
  
  
• Mentor engineers on system design, LLM architectures, distributed systems, and applied ML best practices.
  
  
• Upskill the broader engineering org in AI-native development, tooling, and automation.
  
  

Cross-Functional Impact & Execution Excellence

• Collaborate closely with Data Science, Product, Design, and Research teams to ensure AI capabilities integrate seamlessly into the GTM user journey.
  
  
• Accelerate learning cycles by combining LLM experimentation, product iteration, telemetry insights, and engineering automation.
  
  

What We’re Looking For

Technical & Production Expertise

• 10–15+ years in software engineering, with significant leadership experience owning AI/ML or applied LLM systems at scale.
  
  
• Proven history shipping LLM-powered features, agentic workflows, or AI assistants used by real customers in production.
  
  
• Deep understanding of LLM orchestration frameworks (LangChain, LlamaIndex), RAG pipelines, vector search, embeddings, and prompt engineering.
  
  
• Expert in backend & distributed systems (Python strongly preferred) and cloud infrastructure (AWS/GCP).
  
  
• Strong experience with telemetry, observability, and cost-aware real-time inference optimizations.
  
  

Leadership, Strategy & Delivery

• Demonstrated ability to lead senior engineers, define technical roadmaps, and deliver outcomes aligned to business metrics.
  
  
• Experience building or scaling teams working on experimentation, optimization, personalization, or ML-powered growth systems.
  
  
• Exceptional ability to simplify complex problems, set clear standards, and drive alignment across Product, Data, Design, and Engineering.
  
  
• Strong product sense, ability to weigh novelty vs. impact, focus on user value, and prioritize speed with guardrails.
  
  

AI-Native Engineering Mindset

• Fluent in integrating AI tools into engineering workflows for code generation, debugging, delivery velocity, and operational efficiency.
  
  
• Comfortable balancing rapid experimentation with production rigor, ensuring features are safe, reliable, and measurable.
  
  
• Thrives in an environment where learning velocity, automation, and continuous improvement are core values.
  
  

What Will Make You Successful at Apollo

• You