---
title: 'Mandarin-speaking: Customer Success Engineer (Contract) at Retell AI'
canonical: 'https://feeny.ai/job/mandarin-speaking-customer-success-engineer-contract-retell-ai-remote-xrxwzkwrjq30'
type: 'job'
last_seen: '2026-09-24'
---

# Mandarin-speaking: Customer Success Engineer (Contract) at Retell AI

- **Company:** Retell AI
- **Location:** Remote
- **Employment:** contract
- **Work type:** remote
- **Posted:** 2026-09-15
- **Last confirmed live:** 2026-09-24
- **Apply:** https://jobs.ashbyhq.com/retell-ai/ff9c1c3f-65b3-49ad-9774-7e97af55a720

## Job description

## ABOUT RETELL AI

Retell AI is using first-principles thinking to reimagine the call center with cutting-edge voice AI. Thousands of companies now use Retell's AI voice agents to handle sales, support, and logistics calls that once required large teams of human agents. Backed by Y Combinator, Alt Capital, and other leading investors, we've scaled to $80M in ARR with a team of 50, up from $5M at the start of 2025, and are now valued at over $1.5B. Our vision for 2026 is to build a modern CX platform where entire contact centers are powered by AI. Instead of basic automation that needs constant human tuning, we're creating intelligent AI “workers” that act as frontline agents, QA analysts, and managers, continuously executing, monitoring, and improving every customer interaction. We're growing fast and looking for ambitious builders who want to tackle hard technical problems, move quickly, and have a real impact on one of the fastest-growing voice AI companies in the world. Let's build the future together. Recent recognition:

- [No. 1 Best Places to Work in the Bay Area, San Francisco Business Times 2026](https://finance.yahoo.com/technology/ai/articles/voice-ai-startup-retell-ai-145200025.html)
- https://a16z.com/the-ai-application-spending-report-where-startup-dollars-really-go/
- [#3 Fastest-Growing Software Company, G2 Best Software Awards 2026](https://company.g2.com/news/g2s-2026-best-software-awards)
- [Best Agentic AI Software, G2 Best Software Awards 2026](https://www.retellai.com/blog/retell-ai-recognized-as-the-best-agentic-ai-software-by-g2)
- [#4 Fastest-Growing Software Vendor, Brex Benchmark 2025](https://www.brex.com/journal/brex-benchmark-december-2025)
- [Enterprise Tech 30 Class of 2026, Nasdaq & Wing VC](https://www.nasdaq.com/videos/retell-ai)
- [Top-Ranked Startup, Lean AI Leaderboard](https://leanaileaderboard.com/)
- [Backed by Y Combinator](https://www.ycombinator.com/companies/retell-ai)

## ABOUT THE ROLE

We're hiring a Mandarin-Speaking Customer Success Engineer on a long-term 1099 contract to help enterprise customers successfully deploy and scale AI voice agents in production. You'll work directly with customers to build AI voice agents, design integrations, troubleshoot deployments, and solve technical problems. The role sits at the intersection of software engineering, customer success, and AI deployment. You'll work closely with Engineering, Product, and Customer Success while partnering directly with customer technical teams.

## KEY RESPONSIBILITIES

Enterprise Customer Deployments

- Support technical onboarding and deployment for enterprise customers.
- Help customers launch and scale AI voice agents.
- Build trusted relationships with customer engineering teams.

Technical Consulting

- Build AI voice agents alongside customers.
- Design conversation flows and deployment strategies.
- Debug APIs, webhooks, SIP, telephony, authentication, integrations, and latency issues.
- Troubleshoot production deployments and technical issues.
- Work directly in customer codebases when needed.

Partner with Product & Engineering

- Identify product gaps through customer feedback.
- Translate customer needs into actionable product improvements.
- Work closely with Product and Engineering teams.

Customer Growth

- Help customers launch new AI use cases.
- Identify opportunities to expand product adoption.
- Become a trusted technical partner to enterprise customers.

## WHAT WE'RE LOOKING FOR

Must Have

- Must be able to read, write and speak in Mandarin & English.
- Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, or a related technical field.
- 2–8 years of professional experience, ideally in Customer Success Engineering, Solutions Engineering, Forward Deployed Engineering, Software Engineering, or a similar technical role.
- Strong technical problem-solving skills.
- Experience working with APIs and debugging technical issues.
- Strong communication skills and the ability to explain technical concepts clearly to customers.
- Comfortable working directly with customers and building technical solutions with them.
- Must be available to work some overlapping hours with our Pacific Time-based team and customers.

## Nice to Have

- Experience with Python or TypeScript.
- Experience with AI, LLMs, or Voice AI.
- Startup experience.
- Enterprise customer experience.
- Willingness to travel occasionally for customer launches or onsite work.

## YOU MIGHT THRIVE IF

- You enjoy solving technical problems directly with customers.
- You like building alongside customers rather than just supporting them.
- You're comfortable debugging complex systems.
- You move quickly and enjoy a fast-paced startup environment.
- You enjoy working across Engineering, Product, and Customer Success.

## JOB DETAILS

- Employment Type: Full-Time 1099 Contractor
- Location: Remote
- Compensation: $6000–$7500 USD/Month, based on experience
- Hours: Must be open to working some overlapping hours with our Pacific Time team and customers.

## About Retell AI

## Company Overview
- **One-liner**: Retell AI is a real-time conversational AI platform that builds human-like, low-latency voice agents to automate phone calls for businesses.
- **Entity Type**: Private (Seed stage, Y Combinator-backed)
- **Headquarters**: San Carlos, California, United States
- **Founded**: 2023
- **Founders**: Bing Wu (CEO), Todd Li (COO), Evie Wang (CTO), Weijia Yu (President), Zexia Zhang (CMO)

## Core Business
- **Primary industries**: Contact Center Automation, AI Voice Agents, Conversational AI, Enterprise Communication Software
- **Target customers**: B2B (enterprise, healthcare, insurance, automotive, SMBs)
- **Mission**: "A world where every business call is handled by AI that actually gets it right."

## Products & Services
- **AI Voice Agent Platform (SaaS)**: Drag-and-drop agentic framework to build, deploy, and manage AI voice agents for inbound (support, routing, appointment booking) and outbound (reminders, lead qualification, surveys) calls. Includes:
  - Real-time function calling (book, pay, update records, transfer)
  - Proprietary turn-taking model and ultra-realistic voices
  - Streaming RAG with auto-sync knowledge base
  - Performance analytics dashboard
  - Batch calling with conversion tracking
  - SIP trunking (connect to any telephony)
  - Enterprise on-prem deployment option
  - Compliance: HIPAA, SOC 2 Type II, GDPR; SSO; PII redaction; role-based access

## Market Standing
- **Valuation**: Not publicly available
- **Key Metric**: $40M annualized revenue (fully profitable as of 2025)
- **Total Funding**: $9.4M (including $4.6M seed round led by Alt Capital, backed by Y Combinator and angel investors)
- **Headcount**: ~69 employees (175% YoY growth)
- **Notable Investors/Partners**: Alt Capital (lead seed), Y Combinator

## Competitive Advantages
- **Proprietary Voice AI Orchestration**: Built from the ground up for sub-second latency (~600ms) and natural turn-taking, not stitched-off APIs.
- **Scalability**: Battle-tested infrastructure handling millions of calls reliably.
- **Enterprise Security**: HIPAA/SOC2/GDPR certified, on-prem deployment, SSO, redaction.
- **High Capital Efficiency**: $40M ARR with only 25 employees at time of reaching that milestone.

## Strategic Focus
- Replace traditional call centers by shifting from human-staffed support to AI-handled routine calls, with human escalation for complex cases.
- Continue improving low-latency, agentic voice models and expanding enterprise feature set (batch calling, analytics, compliance).
- Scale customer base across healthcare, insurance, and other regulated verticals.

## Why Work Here
- **Culture**: Small, high-ownership teams; >$1M revenue per employee; "ship fast" — no committees, ship this week if you can make the case.
- **Work Environment**: In-office in San Carlos (on purpose — speed and collaboration on hard problems).
- **Benefits**: Competitive equity packages, health/dental/vision insurance, meal stipends, relocation support, visa sponsorship (H-1B and other work visas).
- **Tech Stack**: Backend in TypeScript and Python, ML in Python, Frontend in React.
- **Interview Process**: Conversations with co-founders, deep on product thinking and technical ability, transparent and fast.

## Sources
1. [retellai.com](https://www.retellai.com/)
2. [retellai.com/about-us](https://www.retellai.com/about-us)
3. [retellai.com/careers](https://www.retellai.com/careers)
4. [linkedin.com/company/retellai](https://www.linkedin.com/company/retellai)
5. [cbinsights.com/company/retell-ai](https://www.cbinsights.com/company/retell-ai)

## Other roles at Retell AI

- [Enterprise Account Manager](https://feeny.ai/job/enterprise-account-manager-retell-ai-san-francisco-ydkvh2a6fh74) — San Francisco, CA
- [Procurement Manager](https://feeny.ai/job/procurement-manager-retell-ai-san-francisco-4mqtg8h4yzcj) — San Francisco, CA
- [Product Design Intern](https://feeny.ai/job/product-design-intern-retell-ai-san-francisco-wxjp3pdf7c23) — San Francisco, CA
- [Spanish-speaking: Customer Success Engineer (Contract)](https://feeny.ai/job/spanish-speaking-customer-success-engineer-contract-retell-ai-remote-btpyvgxfdxrg)
- [Senior Forward Deployed Engineer (Singapore)](https://feeny.ai/job/senior-forward-deployed-engineer-singapore-retell-ai-singapore-96y4syask819) — Singapore
- [Forward Deployed Engineer, New Grad](https://feeny.ai/job/forward-deployed-engineer-new-grad-retell-ai-san-francisco-yhk660ra0zve) — San Francisco, CA
- [Founding Strategic Partnerships, Cloud & Alliances](https://feeny.ai/job/founding-strategic-partnerships-cloud-alliances-retell-ai-san-francisco-teynheaq1qm7) — San Francisco, CA
- [SEO Strategist/Growth SEO Lead](https://feeny.ai/job/seo-strategist-growth-seo-lead-retell-ai-san-francisco-bm5es33g3pmt) — San Francisco, CA
- [Telephony/VOIP Engineer - Remote](https://feeny.ai/job/telephony-voip-engineer-remote-retell-ai-remote-7h5qb6e177t6)
- [Deployment Consultant - Singapore](https://feeny.ai/job/deployment-consultant-singapore-retell-ai-singapore-1m6as0mb6d7d) — Singapore