Senior AI-Driven Backend Engineer

virtuos holdings pte. ltd.; Singapore; On-site; SGD 140,000 - 190,000; Full time

Job summary

virtuos holdings pte. ltd. seeks a Senior Backend Engineer to design, develop, and maintain backend services and AI-powered applications. You will deliver new features, implement AI capabilities, and improve the reliability and performance of existing systems.

This hands-on role requires owning features from design through deployment, collaborating with cross-functional teams, and mentoring junior engineers as the organization scales its AI-driven products in a fast-paced environment.

Qualifications

• 5+ years of professional backend development experience, including 2+ years developing AI-powered applications or services
• Strong Python and FastAPI expertise, including asynchronous programming, type annotations, Pydantic, dependency injection, and RESTful API design
• Practical experience integrating AI APIs or SDKs, including prompt design, structured outputs, and streaming or asynchronous workflows
• Understanding of LLM challenges including context management, hallucinations, prompt injection, rate limits, and token costs
• Hands-on cloud experience (AWS/Azure/GCP)
• Solid PostgreSQL or relational DB skills with data modeling and query optimization
• Knowledge of secure API design, authentication/authorization, and secrets management
• Experience with testing (pytest), Git, CI/CD, and Docker
• Strong problem-solving and ability to navigate and improve existing codebase
• Strong written and verbal English and Chinese communication skills

Responsibilities

• Design, develop, and maintain scalable Python services and secure RESTful APIs using FastAPI
• Integrate AI capabilities and tools, including LLMs and AI SDKs, with well-defined input/output schemas
• Collaborate with cross-functional teams, review code, and mentor junior engineers
• Ensure reliability, performance, and maintainability of backend and AI integrations
• Write automated tests, improve logging, monitoring, and CI/CD pipelines
• Design multi-agent workflows when appropriate to meet business needs

Skills

Python

FastAPI

Async programming

RESTful APIs

English-Chinese

Pytest

Git & CI/CD

Docker

Problem solving

Cloud platforms

Tools

AWS

Azure

GCP

Vue

React

LangGraph

Claude Agent SDK

Pydantic AI

pgvector

vLLM

llama.cpp

Job description

virtuos holdings pte. ltd. seeks a Senior Backend Engineer to design, develop, and maintain backend services and AI-powered applications. You will deliver new features, implement AI capabilities, and improve the reliability and performance of existing systems.

This hands-on role requires owning features from design through deployment, collaborating with cross-functional teams, and mentoring junior engineers as the organization scales its AI-driven products in a fast-paced environment.