Production GenAI Engineer: LLMs & Multi-Agent Systems

OnebyZero .; Singapore; On-site; SGD 120,000 - 190,000; Full time

Benefits offered by this job

Equal opportunity employer

Job summary

OneByZero is seeking an Applied AI Engineer with 3-4 years of experience to design and build production-grade GenAI systems for enterprise clients in Asia Pacific. You will contribute architecture coverage across the team—reviewing system designs, identifying gaps, and guiding decisions at the solution level.

The role focuses on end-to-end LLM design, RAG pipelines, and multi-agent architectures with production readiness as a priority.

Qualifications

• 3-6 years of experience in ML engineering, LLMs, or model development roles.
• Hands-on experience with CPT, SFT, LoRA, or QLoRA on LLMs.
• Strong Python programming skills and production-ready code.
• Experience running model evaluation and benchmarking pipelines.
• Solid understanding of transformer architectures and fine-tuning effects.
• Experience deploying models to cloud environments with cost and latency in mind.
• Strong problem-solving skills and client-facing collaboration.
• Experience with AWS-native GenAI building blocks and secure enterprise deployments.

Responsibilities

• Design end-to-end LLM system architecture for real-world enterprise use cases.
• Pre-train, fine-tune LLMs and domain models for client-specific needs.
• Design and run model evaluation pipelines to benchmark performance and cost.
• Optimize models for latency, throughput, and token efficiency in production.
• Integrate fine-tuned models into multi-agent pipelines with orchestration teams.
• Implement prompt versioning, rollback strategies, and monitoring for reliability.
• Translate client requirements into model adaptation strategies with clear success criteria.
• Contribute to knowledge sharing on fine-tuning practices and tooling.
• Define enterprise integration patterns for governance and data boundaries.
• Improve production reliability and collaborate with cross-functional teams.

Skills

LLM engineering

Python

System design

Production ML

Cloud (AWS)

Fine-tuning (SFT/LoRA/QLoRA)

Retrieval augmented generation

Multi-agent systems

Code reviews

Education

Bachelor's degree in CS/ML

Tools

Docker

Kubernetes

Bedrock

OpenSearch

Lambda

ECS/EKS

Pinecone/Weaviate/Milvus/FAISS

Job description

OneByZero is seeking an Applied AI Engineer with 3-4 years of experience to design and build production-grade GenAI systems for enterprise clients in Asia Pacific. You will contribute architecture coverage across the team—reviewing system designs, identifying gaps, and guiding decisions at the solution level.

The role focuses on end-to-end LLM design, RAG pipelines, and multi-agent architectures with production readiness as a priority.