Job Closed

Mandarin-speaking: Software Engineer (Contract)

Source: Ashby
Retell AI
$63,000 /yr
Remote
San Francisco
Mid level

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:

ABOUT THE ROLE

We’re hiring a Mandarin-Speaking Software 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 and English.
Bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, or a related technical field.
2-8 years of professional software engineering experience, with a strong backend focus (e.g., building and maintaining services, APIs, and data pipelines in production). Prior Solutions Engineering, Forward Deployed Engineering, or Customer Success Engineering experience is a plus, but a software engineering foundation is required.
Strong backend fundamentals: you can write clean, working code on your own (Python, Node.js, or similar), design and integrate REST/webhook APIs, work with databases, and reason about system design, authentication, and error handling.
Able to pass a hands-on backend technical assessment (live coding or take-home) without relying on AI tools. We expect you to use AI to move faster, but you must understand and …

Skills

g2
benchmark
scaleai
Python
NodeJS
ashby

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