Lead Full Stack Engineer

Virtuos Ltd.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Benefits offered by this job

Relocation support

Medical healthcare

Mobility opportunities

Learning opportunities

R&D center access

Group outings

Job summary

Virtuos in Singapore seeks a lead Full-Stack Engineer to guide a diverse team in designing and optimizing production-grade tools and applications that support game asset pipelines and production workflows.

You will own backend and frontend architectures, implement scalable RESTful APIs with Python, and mentor engineers while collaborating with UI/UX, production, SRE, and IT teams.

Qualifications

• 7+ years of production full-stack engineering experience.
• Strong Python (FastAPI/Flask) and RESTful API design expertise.
• Proficiency in Vue or React with state management and routing.
• Hands-on cloud experience (AWS/GCP).
• Relational and NoSQL database knowledge (PostgreSQL, MongoDB).
• Experience with caching (Redis) and message queues.
• Proven testing mindset with pytest and automated tests.
• Git, GitLab CI/CD and Docker proficiency.
• Clear communication and cross-functional collaboration.
• Nice to have LangChain/LangGraph and AWS cert.

Responsibilities

• Own prompting strategy at scale: system prompts, guardrails, pollution mitigation, and hyperparameters management.
• Design agent interfaces: MCP servers, structured I/O, and sub-agent patterns.
• Champion typed-agent frameworks with observability and telemetry.
• Evaluate and integrate local LLM options where needed.
• Design scalable backend services and secure RESTful APIs with Python.
• Model and optimize data across relational and NoSQL databases; implement caching.
• Enforce authentication/authorization, input validation, and robust error handling.
• Write tests with pytest; perform performance tuning, code reviews, and documentation.
• Set up CI/CD with Git and GitLab; use Docker for development and deployment.
• Lead engineers; collaborate with UI/UX, backend, production, SRE and IT.
• Work in agile teams and continuously improve engineering practices.

Skills

Python

Vue

React

RESTful API

PostgreSQL

NoSQL

Redis

Git

CI/CD

Testing

AWS/GCP

Docker

LangChain

Tools

SQLAlchemy/Pydantic

GitLab CI/CD

Docker

LangChain/LangGraph

Job description

PLAY, GROW and WIN

To be a part of Virtuos means to be a creator.

At Virtuos, we harness the latest technologies to make games better and more immersive than ever before. That is why we pride ourselves in constantly pushing the boundaries of possibility since our founding in 2004.

Virtuosi is a team of experts - people who have come together to share their mutual passion for making and playing games. People with the same enthusiasm for exploring new ideas and the constant drive to excel in their field. People who believe in earning success through dedication.

At Virtuos, we are at the forefront of gaming, creating exciting new experiences daily. Join us to Play, Grow and Win - together.

ABOUT THE POSITION

We're seeking a lead Full-Stack Engineer to lead a diverse team to design, implement, and optimize production-grade tools and applications that support video game asset pipelines and production workflows.

RESPONSIBILITIES

• Agent loop & harness engineering
  • Own prompting strategy at scale: system prompt design, guardrails, mitigation of context poisoning and pollution, and management of hyperparameters (context window sizing, lost-in-the-middle effects, temperature, top-k).
  • Design tool interfaces for agents: MCP servers, structured inputs/outputs for context, and sub-agent composition patterns.
  • Champion best practices for typed-agent frameworks, with first-class observability and telemetry baked into every agent.
  • Evaluate and integrate local LLM options where latency, cost, or data-residency requirements demand it.
• Backend
  • Design and build scalable backend services and secure RESTful APIs using Python (FastAPI or Flask).
  • Model, query, and optimize data across relational and NoSQL databases; implement caching and messaging when needed.
  • Enforce authentication/authorization, input validation, and robust error handling.
• Quality, performance, and delivery
  • Write comprehensive tests with tools such as pytest.
  • Own performance tuning, troubleshooting, code reviews, and technical documentation.
  • Set up and maintain CI/CD with Git and GitLab; use Docker for local development and deployment pipelines.
• Collaboration and process
  • Lead a group of engineers to deliver AI/Software project.
  • Partner with UI/UX, backend, production, SRE, and IT stakeholders to deliver user-centric solutions.
  • Contribute to architectural decisions and mentor junior engineers.
  • Work within agile methodologies, continuously improving team practices.

QUALIFICATIONS

• 7+ years of professional experience building production applications as a full-stack engineer.
• Strong hands-on expertise in Python (FastAPI or Flask), RESTful API design, and SQLAlchemy/Pydantic or similar tooling.
• Proficiency in Vue or React, including routing, state management (Vuex/Pinia or Redux), and component libraries.
• Proven experience working on public cloud like AWS/GCP
• Database proficiency with relational systems (PostgreSQL) and familiarity with NoSQL (MongoDB, Vector DB); experience with caching and message queues (Redis) is valued.
• Proven testing mindset and experience with automated test suites.
• Comfortable with Git, GitLab CI/CD, and Docker.
• Clear communication skills and experience collaborating with cross-functional teams.
• Nice to have
  • Experience with agent development frameworks (LangChain/LangGraph) is a plus.
  • Certification: AWS Certified Solutions Architect - Associate

ABOUT US

Founded in 2004, Virtuos is one of the largest independent video game development companies. We are headquartered in Singapore with offices in Asia, Europe, and North America. Specializing in full-cycle game development and art production, we have delivered high-quality content for more than 1,500 console, PC, and mobile games. Our clients include 23 of the top 25 gaming companies worldwide.

About Our Team

Virtuos first set foot in Singapore in 2018, establishing our new head office at the One-North technology park located just a few minutes away from the city center.

Virtuos Singapore is home to several skilled executives and engineers who support our studios globally. Many of our corporate departments are located here, as well as our new R&D center, dedicated to developing new tools and techniques that allow our global studios to remain at the cutting edge of technology.

As Virtuos continues to grow globally, our headquarters is constantly looking out for new and experienced talent to support our studios as they work on upcoming blockbuster titles.

WHAT WE OFFER

• The headquarters of Virtuos: play an active role in the future of the company
• Be a part of the R&D center and work with cutting edge technology for gaming
• Group outings and activities
• Comprehensive medical healthcare provided for all staff
• Relocation support
• Career and international mobility opportunities with Virtuos Internal Mobility Program
• Access to various in-house and external learning opportunities

People matter. Diverse opinions and experiences matter. At Virtuos, our talented teams are the cornerstone of our success, and we recognize that fostering and advocating for inclusivity is at the center of what we do best - we make games better, together. Virtuos is proud to be an equal opportunity employer that embraces diversity of thought, expression, culture, and backgrounds.