Virtuos

Machine Learning Engineer — AI Agent Platform

Virtuos China

Computer Games · 201-500 employees

9 h ago
machine-learning Senior (5-10 yrs) Full-time China
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About the role

You will build and improve AI agent platforms, including orchestration, tool execution loops, and multi-step workflow management. Additionally, you will develop secure backend services and responsive frontend interfaces to deliver integrated enterprise solutions.

What they look for

Python FastAPI TypeScript Vue React PostgreSQL SQLAlchemy Pydantic LLM REST APIs OAuth 2.0 Docker CI/CD Git Asynchronous programming Workflow orchestration

Requirements

The role requires 5+ years of professional software development experience with strong proficiency in Python, TypeScript, and modern web frameworks. Candidates must have hands-on experience with LLM tool calling, workflow orchestration, and building reliable, secure enterprise-grade applications.

Full description

Responsibilities

  • Agent platform and orchestration• Build and improve agent harnesses, including model and tool execution loops, context management, and structured outputs.
  • Implement multi-step workflows with clear execution boundaries, task state, asynchronous dispatch, and human approval where needed.
  • Enterprise systems and integrations• Develop reusable tools and connectors for enterprise APIs, webhooks, and services, with clear input and output contracts.
  • Handle data mapping, user authorization, rate limits, and integration errors; document dependencies with system owners.
  • Full-stack product delivery• Design Python backend services, secure REST APIs, and PostgreSQL data models for agent and workflow features.
  • Build responsive web interfaces for task progress, user confirmations, and results using TypeScript and modern frontend frameworks.
  • Security and reliability• Protect credentials, preserve user access boundaries across systems, and apply appropriate execution isolation and audit logging.
  • Improve concurrency control, retries, idempotency, cancellation, and recovery; trace failures across model calls, tools, and workers.
  • Quality and collaboration• Maintain automated and integration tests, CI/CD, and agent evaluations covering task success, output quality, latency, and cost.

Work with product, design, IT, SRE, and business system owners; contribute code reviews, documentation, and technical guidance.

Qualifications

  • 5+ years of professional software development experience, including delivery of production applications across backend and frontend.
  • Strong Python skills with FastAPI or similar frameworks, asynchronous programming, REST APIs, SQLAlchemy/Pydantic or equivalent tooling, and PostgreSQL data modeling.
  • Hands-on experience with LLM tool calling, agent execution, or workflow orchestration; practical examples explaining design decisions, context and state management, and failure handling.
  • Experience integrating enterprise or third-party systems, including API contracts, data mapping, pagination, rate limits, and retries.
  • Understanding of OAuth 2.0/OIDC, authorization, role-based access control, and secure credential handling in applications.
  • Ability to build reliable asynchronous workflows using task state, concurrency control, idempotency, and recovery from partial failures.
  • Proficiency in TypeScript and Vue or React, including routing, state management, and reusable components. Vue 3 is preferred; willingness to adapt is essential.
  • Experience with automated and integration testing, Git, CI/CD, and Docker; ability to troubleshoot using logs and metrics and evaluate agents against representative tasks.
  • Clear communication with global, cross-functional teams and the ability to explain technical tradeoffs to non-technical stakeholders.

Nice to have

  • Experience extending agent harnesses, SDKs, or orchestration frameworks such as LangGraph, LangChain, or custom implementations.
  • Development of MCP servers, connectors, plugins, or SDKs; integrations with Microsoft Graph, Teams, SharePoint, Jira, ERP, or similar systems.
  • Experience with long-running workflows, human approval, durable task state, recovery, or agent evaluation frameworks.
  • Hands-on cloud deployment and operations experience, preferably AWS; familiarity with caching, queues, NoSQL databases, or vector search.
  • Electron development or plugins for desktop and productivity applications.

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