---
title: 'Member of Technical Staff - Post-Training at Ghost'
canonical: 'https://feeny.ai/job/member-of-technical-staff-post-training-ghost-san-francisco-pf1hy3nde5dx'
type: 'job'
last_seen: '2026-10-16'
---

# Member of Technical Staff - Post-Training at Ghost

- **Company:** Ghost
- **Location:** San Francisco, CA
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-10-15
- **Last confirmed live:** 2026-10-16
- **Apply:** https://jobs.ashbyhq.com/ghost/dfb5517a-2cec-41b4-925f-1ed34037c3a6

## Job description

## About Ghost

Ghost is a personal AI hardware company. To realize the full benefit of what models will do for people, we believe an entirely new platform will be built around AI. Some devices will let your AI understand what is happening around you, others will enable you to get things done without navigating apps or menus. As these systems become more capable and more personal, it matters who owns them. We’re building a future where that intelligence belongs to you, with an ecosystem of devices and software that gives you greater control over your time, attention, and the things you want to accomplish.

## What you'll do

- Post-train open models to power personal agents that run locally on Core.
- Improve tool use, reasoning, and reliable execution across complex, multi-step tasks.
- Build training datasets and feedback pipelines grounded in realistic agent workflows.
- Develop supervised fine-tuning and reinforcement learning methods that translate model capability into useful product behavior.
- Build evaluations that measure task completion, personalization, and when agents should act or ask for guidance.
- Work closely with the agent and inference teams to improve quality within on-device memory, compute, and latency constraints.

## Who you are

- Experience post-training language models through supervised fine-tuning, reinforcement learning, or preference optimization.
- Strong Python and PyTorch skills, with experience building and debugging training pipelines.
- Experience creating datasets and evaluations that produce measurable improvements in model behavior.
- Familiarity with tool-using agents, multi-step environments, and the challenges of training against task outcomes.
- Strong experimental judgment: you can diagnose failures, test hypotheses, and distinguish benchmark gains from meaningful product improvements.
- Ability to work on-site in San Francisco.

## About Ghost

## Company Overview
- **One-liner**: Ghost builds personal AI factories—dedicated hardware and software for autonomous AI agents that you own and control.
- **Entity Type**: Private (Seed stage, $10.5M raised)
- **Headquarters**: San Francisco, California, USA
- **Founded**: 2025
- **Founders**: Zain Javaid

## Core Business
- **Primary industry**: Artificial intelligence, consumer hardware, agentic software
- **Target customers**: B2C (individuals who want a personal AI agent) and developers building agent-based systems
- **Mission**: Enable personal intelligence that lives on your own infrastructure, not in the cloud—giving users full ownership and control over their data and AI.

## Products & Services
- **Ghost Personal AI Agent (Software)**: An AI agent that learns from all your emails, files, conversations, and journals; can manage finances, make decisions, run companies, and control smart home devices.
- **Ghost Dedicated Hardware**: Ambient devices (e.g., home assistants, context capture devices) designed for always-on, autonomous AI operation—unlike phones or laptops that are human-driven.
- **Ghost Ecosystem**: A new computing paradigm where agents work 24/7 without waiting for app launches, handling tasks proactively.

## Market Standing
- **Valuation/Market Cap**: Not disclosed
- **Key Metric**: Total funding $10.5M (Seed round)
- **Notable Investors/Partners**: a16z, Abstract, Audacious, SV Angel, Nova, Cory Levy, Max Mullen
- **Growth Signals**: Extremely small team (~5 employees) with high talent density; hiring founding engineer; ambitious vision for a new computing primitive; founders and team come from top quant shops and universities.

## Competitive Advantages
- **Ownership & Privacy**: Unlike cloud-based AI, Ghost’s agents run on hardware you own, ensuring data never leaves your control.
- **Purpose-built Hardware**: Designing devices specifically for autonomous, ambient AI operation rather than repurposing smartphones or laptops.
- **Small, Intense Team**: Highly selective, talent-dense team working on the hardest unsolved problems in agentic systems.

## Strategic Focus
- Build the next generation of consumer AI hardware and operating system for personal intelligence.
- Develop context capture devices (transcription, video, etc.) and fully local home assistants.
- Create an ecosystem where agents are always accessible and can act autonomously over days and weeks.

## Why Work Here
- **Culture**: “Aggressively young, talented team” that values endurance and deep technical work. Team members have turned down millions in cash/equity from top firms to build real products.
- **Work Environment**: San Francisco-based; likely in-office given the hardware focus. Job posting for founding engineer is in SF.
- **Perks & Engineering**: Well-funded seed stage with competitive salary ($130k–$220k for founding engineer). Engineers are expected to use AI agents to write >90% of their code. Opportunity to define a new computing primitive from the ground up.

## Sources
1. [tryghost.ai](https://tryghost.ai/)
2. [standout.work (company page)](https://standout.work/companies/f2f62752-19ea-49dd-acaf-977daf51c5af)
3. [standout.work (job posting)](https://standout.work/jobs/002635f8-047c-4bbf-9687-862570243df1)
4. [zainjavaid.com](https://zainjavaid.com/)
5. [github.com/GhostAILabs](https://github.com/GhostAILabs)

## Other roles at Ghost

- [Operations](https://feeny.ai/job/operations-ghost-san-francisco-kjhpq32682yy) — San Francisco, CA
- [Member of Technical Staff - Inference](https://feeny.ai/job/member-of-technical-staff-inference-ghost-san-francisco-4k7xgysnm46k) — San Francisco, CA
- [Member of Technical Staff - Product](https://feeny.ai/job/member-of-technical-staff-product-ghost-san-francisco-v3a6gcgw3nxa) — San Francisco, CA
- [Member of Technical Staff - Post-Training](https://feeny.ai/job/member-of-technical-staff-post-training-reflection-san-francisco-fby1zc1bnew1) — San Francisco, CA