--- title: 'Developer Success Engineer at AgentMail' canonical: 'https://feeny.ai/job/developer-success-engineer-agentmail-san-francisco-4ea3f81yhgxk' type: 'job' last_seen: '2026-10-14' --- # Developer Success Engineer at AgentMail - **Company:** AgentMail - **Location:** San Francisco, CA - **Employment:** full-time - **Work type:** remote - **Posted:** 2026-10-12 - **Last confirmed live:** 2026-10-14 - **Apply:** https://jobs.ashbyhq.com/agentmail/d5f93429-e6c2-4d0c-8b73-a64847a561bb ## Job description Location: San Francisco / Remote Okay AgentMail gives AI agents their own email inboxes. We’re looking for a Developer Success Engineer to own the front line between developers using AgentMail and the team building it. This isn’t a role where success means closing as many tickets as possible. We want someone who can solve technical problems independently, understand what a developer is actually trying to do, and recognize when the same problem keeps showing up. Your job is to answer the question, figure out why it had to be asked, and make sure we learn from it. ## What you’ll do - Own technical support for developers building with AgentMail. - Debug API requests, webhooks, product issues, and integrations. - Reproduce issues and determine whether something is expected behavior, developer error, a documentation gap, or a product bug. - Resolve the large majority of issues independently without needing to pull in another engineer. - When something is broken, isolate the problem and give engineering a high-quality reproduction - or open a PR and fix it yourself. - Notice recurring questions and friction across support conversations and surface those patterns to the team. - Identify inconsistencies and confusing behavior across our API, documentation, and developer experience. - Jump on calls with developers when async debugging isn’t enough. - Write concise, technically precise responses that make developers feel like they’re talking to someone who actually understands their problem. You will be a fit if - You have 2-6 years of experience in technical support, developer experience, solutions engineering, or engineering, ideally working with a developer-facing or API-first product. - You’re comfortable reading API documentation, inspecting requests and responses, working with logs, and reproducing technical issues. - You can distinguish between a bug, expected behavior, and incorrect API usage without immediately escalating to engineering. - You can write code to investigate issues and ship small fixes. - You’re an unusually clear and concise communicator. - You’re resourceful. When you don’t know the answer, your instinct is to investigate rather than hand the problem to someone else. - You have strong interpersonal instincts and genuinely care about understanding why a customer is frustrated or confused. - You notice patterns. Answering the same question for the fifth time makes you want to fix the underlying problem. What this role isn’t This isn’t traditional customer success or account management. You won’t spend your day running check-in calls or forwarding technical questions to engineers. You’ll be expected to understand the product deeply enough to investigate most problems yourself - and to turn what you learn from customers into signal for the people building AgentMail. ## About AgentMail ## Company Overview - **One-liner**: AgentMail provides an API-first email inbox service built specifically for AI agents, enabling them to send, receive, and manage emails autonomously. - **Entity Type**: Private (YC S25, Seed-stage) - **Headquarters**: San Francisco, California, United States - **Founded**: 2025 - **Founders**: Haakam Aujla, Adi Singh, Michael Kim ## Core Business - **Primary industry**: Email infrastructure / AI agent tooling - **Target customers**: B2B – developers and platform builders creating AI agents that need to communicate via email - **Mission or purpose**: To give every AI agent its own email inbox, enabling identity, communication, and persistent memory on the internet. ## Products & Services - **AgentMail API**: REST API to programmatically create inboxes, send/receive emails with full threading, attachments, and multi-party support. Includes webhooks, WebSockets, custom domains (DKIM/SPF/DMARC), and semantic search. [agentmail.to](https://www.agentmail.to/) - **SDKs & MCP Server**: Python and TypeScript SDKs, plus an MCP (Model Context Protocol) server for AI tool integration. [agentmail.to](https://www.agentmail.to/) - **IMAP & SMTP Access**: Legacy protocol support alongside the API for compatibility. [agentmail.to](https://www.agentmail.to/) - **Multi-tenant Pods**: For platform builders who need to manage inboxes across many customers. [agentmail.to](https://www.agentmail.to/) ## Market Standing - **Valuation/Market Cap**: Not publicly available (private company) - **Key Metric**: Total Funding – $6.625M (as of March 2026) [linkedin.com](https://www.linkedin.com/company/agentmailto) - **Notable Investors/Partners**: Y Combinator (S25), General Catalyst (lead in later seed round), Paul Graham, Paul Copplestone (Supabase founder), Karim Atiyeh (Ramp founder). [ycombinator.com](https://www.ycombinator.com/companies/agentmail) - **Growth Signals**: Team size ~10 (up from 8, +200% YoY); 5,800+ LinkedIn followers (+5.4% monthly); 3 active job postings; backed by top-tier investors. [linkedin.com](https://www.linkedin.com/company/agentmailto) ## Competitive Advantages - **First-to-market for AI-native email**: Built from scratch for agent use cases, unlike legacy providers (Gmail, Outlook) that lack API-first inbox creation and impose restrictive rate limits. - **Fully managed persistent inboxes**: Handles parsing, threading, labeling, searching, and replying – agents get the same email experience as humans without building custom logic. - **Developer-first design**: Simple API key auth, no OAuth headaches, built-in permissions and guardrails, semantic search across all inboxes. - **Scalable infrastructure**: Usage-based pricing without per-inbox monthly fees, designed to handle high volumes of emails and inboxes. ## Strategic Focus - **Current priorities**: Scaling the platform to meet growing demand from AI agent builders; expanding SDK support and integrations; hiring engineering, GTM, and operations talent to accelerate product development and market adoption. [ycombinator.com](https://www.ycombinator.com/companies/agentmail/jobs) - **Direction**: Become the default email infrastructure layer for the AI agent ecosystem, enabling agents to communicate, authenticate, and transact via email just like humans. ## Why Work Here - **Culture**: Small, YC-backed team (10 people) working on hard infrastructure problems at the intersection of email protocols and AI. Founders have backgrounds at Optiver, NVIDIA, and Accel. [ycombinator.com](https://www.ycombinator.com/companies/agentmail) - **Remote/Hybrid**: Based in San Francisco; likely in-office given the early-stage startup nature, but not explicitly stated. - **Perks & Engineering Culture**: Competitive salary ($110K–$400K depending on role) plus meaningful equity (0.20%–2.00%). Opportunity to shape the product from the ground up, work with cutting-edge AI tooling, and join a fast-growing company backed by top investors. [ycombinator.com](https://www.ycombinator.com/companies/agentmail/jobs) ## Sources 1. [agentmail.to](https://www.agentmail.to/) – Company website, product description, and career page 2. [ycombinator.com](https://www.ycombinator.com/companies/agentmail) – Y Combinator company profile (funding, founders, team size, open roles) 3. [linkedin.com](https://www.linkedin.com/company/agentmailto) – LinkedIn company page (funding rounds, headcount growth, investors, executive team) ## Other roles at AgentMail - [Founding Operations Lead](https://feeny.ai/job/founding-operations-lead-agentmail-san-francisco-t62cjs6z0wqr) — San Francisco, CA - [Founding Product Engineer](https://feeny.ai/job/founding-product-engineer-agentmail-san-francisco-bndn1d382q5y) — San Francisco, CA - [Agent Experience Engineer](https://feeny.ai/job/agent-experience-engineer-agentmail-san-francisco-x2gzg5c28249) — San Francisco, CA - [Founding PLG & Community Lead](https://feeny.ai/job/founding-plg-community-lead-agentmail-san-francisco-hxwsf3nnqjq6) — San Francisco, CA - [Founding GTM & Operations Lead](https://feeny.ai/job/founding-gtm-operations-lead-agentmail-san-francisco-yw31f1tp18z0) — San Francisco, CA - [GTM Engineer](https://feeny.ai/job/gtm-engineer-agentmail-san-francisco-eehm2x1gjdc3) — San Francisco, CA - [Senior Engineer, Backend/Infra](https://feeny.ai/job/senior-engineer-backend-infra-agentmail-san-francisco-5z8yf46hk0fw) — San Francisco, CA - [Founding Engineer](https://feeny.ai/job/founding-engineer-agentmail-san-francisco-e4apbq47g5qj) — San Francisco, CA - [Developer Success Engineer](https://feeny.ai/job/developer-success-engineer-twilio-united-states-093a76gmjx7a) — United States - [Developer Success Engineer](https://feeny.ai/job/developer-success-engineer-prefect-remote-rckjg9jpzt7a)