The Role
Design and deliver agentic LLM systems and an internal agent platform for game-development workflows. Lead agent runtime architecture, prompt orchestration, memory systems, evaluation pipelines, and secure production APIs. Build scalable backend services (FastAPI/Python), CI/CD, observability, and integrate local or hosted LLMs. Collaborate cross-functionally to productionize agent-based tooling.
Summary Generated by Built In
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.
ResponsibilitiesAgent 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.
- 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
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
The award-winning Virtuos Shanghai studio was founded in late 2004, the first of six game development studios located internationally and the former headquarters of the group before its relocation to Singapore in 2018.
Staffed by a multicultural group of talents, the studio specializes in providing full-stack game development and co-development services, including technical support for art and engineering. Virtuos Shanghai is also the base of operations for multiple Art teams working on the world’s top triple-A projects.
• Work alongside industry veterans
• A total of 14 different nationalities working together
• Live and work in an exciting, cosmopolitan city
• Contribute to the world’s biggest AAA games
• Customized training programs and regular workshops
• Group fitness, wellness activities
• Reasonable and flexible working hours
• Gaming corners with consoles and canteens on every floor
• Comprehensive medical healthcare provided for all staff
• Relocation support provided
• Career and international mobility opportunities with Virtuos Internal Mobility Program
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.
Skills Required
- 6+ years professional experience building production applications with recent depth in AI/LLM systems
- Python expertise (FastAPI, Pydantic, SQLAlchemy or equivalent); strong proficiency in TypeScript or JavaScript also acceptable
- Solid database skills: relational (PostgreSQL) and non-relational (e.g., MongoDB, vector databases); familiarity with caching/queues (Redis)
- Working knowledge of RBAC, authentication/authorization patterns, and secure API design
- Comfortable with Git, GitLab CI/CD, and Docker/containers
- Proven testing mindset and experience with automated test suites (e.g., pytest)
- Demonstrated experience designing and operating agent loops in production (agent orchestration, tool integration, recovery behavior)
- Deep practical understanding of prompting, guardrails, context poisoning/pollution, and model hyperparameters
- Hands-on experience integrating tools into agents (MCP servers, structured I/O, sub-agent orchestration)
- Experience with an agent development framework (e.g., LangChain, LangGraph, Claude Agent SDK, Pydantic AI)
- Practical experience implementing agent memory: history compaction, context chaining, episodic memory, retention/decay policies
- Experience establishing test- and eval-driven development for LLM systems: eval sets, regression suites, CI gates, red-team prompts
- Strong English written and verbal communication; ability to drive technical direction across stakeholders
- Experience running local LLMs (vLLM, Ollama, llama.cpp)
- Contributions to or familiarity with open-source agent harnesses (OpenCode, OpenClaw)
- Production-stage experience with agent development frameworks beyond prototype
Am I A Good Fit?
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.
Success! Refresh the page to see how your skills align with this role.
The Company
What We Do
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. Visit www.virtuosgames.com to find out how we can make games better, together.
.png)
