---
title: 'Principal Engineer, Agentic AI Systems at Inflection AI'
canonical: 'https://feeny.ai/job/principal-engineer-agentic-ai-systems-inflection-ai-palo-alto-california-wg93yg42rzxf'
type: 'job'
last_seen: '2026-09-08'
---

# Principal Engineer, Agentic AI Systems at Inflection AI

- **Company:** Inflection AI
- **Location:** Palo Alto California, United States
- **Posted:** 2026-06-29
- **Last confirmed live:** 2026-09-08
- **Apply:** https://boards.greenhouse.io/inflectionai/jobs/4693056006?gh_jid=4693056006

## Job description

## About Inflection AI

Inflection AI is a Public Benefit Corporation empowering people with human-centered, emotionally intelligent AI. We’re shaping the future of AI by combining emotional intelligence (EQ) and raw intelligence (IQ) to elevate people’s potential.

Inflection AI created Pi, the world’s first emotionally intelligent AI, to help people work through decisions, emotions, and challenges. Pi is a personal AI agent powered by Inflection AI’s foundation model, proving that AI can be personal, empathetic, and contextually aware.

## About the Role

We're looking for a hands-on Principal Engineer to lead the architecture and technical direction of Inflection's agentic AI systems. You'll build production AI agents that can reason, retrieve context, use tools, and safely execute complex workflows while driving the design of scalable agent architectures, evaluation frameworks, observability, and reliability systems. Partnering closely with product, design, and engineering, you'll turn ambiguous problems into AI-native experiences, mentor senior engineers, and help establish the technical standards that power the next generation of intelligent agents.

## What You’ll Do

- Build production AI agents that can plan, retrieve context, call tools, take actions, and recover from failures.
- Design agent architectures for task decomposition, tool routing, memory, state management, human approval, and safe execution.
- Create evals and observability systems for multi-step task success, tool-call accuracy, hallucination resistance, latency, cost, and failure modes.
- Integrate agents with APIs, databases, SaaS tools, enterprise systems, internal systems, and user-facing workflows.
- Improve reliability through structured outputs, guardrails, fallback paths, monitoring, permissions, auditability, and human-in-the-loop controls.
- Partner with product, design, and engineering teams to turn ambiguous user problems into shipped AI-native features.
- Make pragmatic model and infrastructure choices across proprietary models, open-source models, orchestration frameworks, vector databases, and cloud environments.
- Contribute to technical direction, engineering best practices, and the quality bar for agentic AI systems.
- Own the technical direction of agentic AI systems, provide support and coaching to the team.

## What We're Looking For

- 10+ years of engineering experience, including 3+ years at staff/principal or equivalent scope, and 2+ years building production-grade agentic or LLM-powered systems used by real customers.
- Strong Python or TypeScript experience.
- Experience building LLM-powered products, AI agents, RAG systems, automation workflows, or model-integrated applications.
- Strong backend engineering fundamentals, including APIs, databases, queues, testing, observability, cloud infrastructure, and deployment.
- Experience with tool/function calling, structured outputs, embeddings, retrieval, prompt design, and model evaluation.
- Strong product judgment and ability to move from ambiguous problem to shipped product quickly.
- Ability to work effectively in a fast-moving environment with ownership, collaboration, and high technical standards.
- Have a bachelor’s degree or equivalent in a related field to the offered position requirements

## Nice to Have

- Experience with LangGraph, LlamaIndex, OpenAI, Anthropic, Hugging Face, vLLM, or similar tools.
- Experience with agent memory, planning, multi-agent systems, browser automation, workflow automation, or AI copilots.
- Experience building eval pipelines, synthetic test cases, observability, guardrails, or AI safety systems.
- Experience with enterprise SaaS, productivity tools, developer tools, CRM, support, sales, finance, legal, or operations workflows.
- Experience working in early-stage, high-growth, or zero-to-one product environments

Employee Pay Disclosures

At Inflection AI, we aim to attract and retain the best employees and compensate them in a way that appropriately and fairly values their individual contributions to the company. For this role, Inflection AI estimates a starting annual base salary to fall within the range of $400,000.00 to $550,000.00, depending on a candidate’s qualifications and level of experience. This role also includes a meaningful equity component, allowing employees to share in the long-term success of the company.

## Benefits

Inflection AI values and supports our team’s mental, emotional, financial and physical health. We are focused on building a positive, safe, inclusive and inspiring place to work. Our benefits include:

- Robust medical, dental and vision options with employer contributions for HSA, FSA and DFSA
- 401k matching program
- Flexible Time Off, 10 paid holidays, 5 days sick leave
- Parental, Medical and Family care leave
- Generous cell-phone, wellness and office set up stipends
- Support of country-specific visa needs for international employees living in the Bay Area

## About Inflection AI

## Company Overview
- **One-liner**: Inflection AI is an AI studio creating human-centered, emotionally intelligent AI models and agents for individuals and enterprises.
- **Entity Type**: Private (Venture-backed; two funding rounds totaling $1.525B)
- **Headquarters**: Palo Alto, California, United States
- **Founded**: 2022
- **Founders**: Reid Hoffman, Mustafa Suleyman, Karén Simonyan

## Core Business
- **Primary industry**: Artificial Intelligence / Machine Learning
- **Target customers**: B2C (Pi chatbot for individuals), B2B (enterprise API and on-premises solutions)
- **Mission**: “Harness the power of AI to improve human well-being and productivity” – structured as a public benefit corporation.

## Products & Services
- **Pi (Personal AI Assistant)**: A voice-enabled chatbot available on iOS, Android, and web, designed to provide high conversational and emotional intelligence. Free for individual users.
- **Inflection API**: Enables enterprises to integrate Inflection’s conversational AI models into their own applications, with fine-tuning and customization options.
- **On-Premises / Private Cloud Solutions**: Deployments for regulated industries (e.g., wealth management) where data must never leave the customer’s network.
- **BoostKPI (acquired)**: A data analysis platform that helps organizations query and make sense of their data using natural language.
- **Jelled.ai (acquired)**: An organizational data tool that connects to email, accounting, and other business systems to provide Socratic dialogue and insights.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed
- **Key Metric**: Total funding $1.525 billion (latest round: $1.3B led by Microsoft and Bill Gates, June 2023). Annual revenue estimated at $2.0M (LinkedIn data).
- **Notable Investors/Partners**: Microsoft, Bill Gates, UiPath (partnership), Greylock Partners (talent source)
- **Growth Signals**: 62 employees (+28.8% YoY); “hundreds” of API customers; acquisitions of BoostKPI and Jelled.ai; active research into agentic AI.

## Competitive Advantages
- **Emotional Intelligence (EQ) + IQ**: Models are built on a unique, proprietary dataset collected over two years, giving them industry-leading conversational intelligence.
- **On-Premises / Private Cloud**: Ability to run entirely within a customer’s own infrastructure – critical for regulated industries.
- **Public Benefit Corporation Structure**: Legally committed to societal well-being, which builds trust with customers and partners.
- **Small, Agile Team**: Despite raising over $1.5B, the company remains lean (~62 people), allowing rapid iteration and deep collaboration.

## Strategic Focus
- **Enterprise Pivot**: After Microsoft licensed Inflection’s models and hired co-founders Mustafa Suleyman and Karén Simonyan, CEO Sean White refocused the company on practical enterprise use cases rather than the AGI race.
- **Agentic AI**: Research and development into autonomous agents that act on behalf of users, with a focus on trust and alignment.
- **Data Analysis & Productivity**: Acquisitions of BoostKPI and Jelled.ai accelerate the ability to deliver insights from organizational data.
- **Partnerships**: Collaborations like UiPath to embed conversational intelligence into automation workflows.

## Why Work Here
- **Mission-Driven**: As a public benefit corporation, employees work on AI that aims to improve human well-being – a differentiator from many AI labs.
- **Cutting-Edge Technology**: Opportunity to work on frontier models (mixture-of-experts, state-of-the-art conversational AI) without the scale of a giant tech company.
- **Small Team, High Impact**: With only 62 people, every role has significant ownership and visibility. Engineering makes up 33% of the workforce.
- **Culture of Trust**: Leadership emphasizes transparency and trust, reinforced by the public benefit structure.
- **Compensation & Perks**: Not publicly detailed, but LinkedIn reviews rate the company 5.0/5.0 (2 reviews). Alumni often move to Microsoft AI, Google, and other top AI organizations.
- **Work Policy**: Headquarters in Palo Alto; likely hybrid/office-based (not explicitly stated). Active job postings (2 as of search) include Research Engineer, Voice and Senior Backend Engineer.

## Sources
1. [inflection.ai](https://inflection.ai/)
2. [linkedin.com](https://www.linkedin.com/company/inflectionai)
3. [techbrew.com](https://www.techbrew.com/stories/2025/03/28/inflection-ceo-sean-white)
4. [greenhouse.io](https://job-boards.greenhouse.io/inflectionai)

## Other roles at Inflection AI

- [Director of Product Marketing](https://feeny.ai/job/director-of-product-marketing-inflection-ai-palo-alto-california-6jq8v94frad0) — Palo Alto California, United States
- [Program Lead, Safety, Wellbeing and Regulatory](https://feeny.ai/job/program-lead-safety-wellbeing-and-regulatory-inflection-ai-dublin-2dhk0t1rb0t0) — Dublin, Ireland
- [Principal Research Engineer, Model Training & Post-Training](https://feeny.ai/job/principal-research-engineer-model-training-post-training-inflection-ai-palo-76x0eww37ac8) — Palo Alto California, United States
- [Principal Research & Engineering, Realtime Voice AI](https://feeny.ai/job/principal-research-engineering-realtime-voice-ai-inflection-ai-palo-alto-vbx7kq9h24x7) — Palo Alto California, United States
- [Staff Engineer, Agentic](https://feeny.ai/job/staff-engineer-agentic-inflection-ai-palo-alto-california-smkham3tkvvx) — Palo Alto California, United States