Machine Learning Engineer

Orbien LLC; Maryland; On-site; USD 150,000 - 230,000; Full time

Job summary

Orbien LLC seeks an experienced Data Scientist/ML Engineer to architect multi-agent systems capable of planning, tool use, and coordinated task execution. You will design RAG pipelines, embeddings, hybrid retrieval, and context window strategies to optimize performance.

You will fine-tune and evaluate small, medium, and large language models for domain-specific reasoning and summarization, and develop prompt engineering frameworks, guardrails, and automated evaluation suites for agent

Qualifications

• 7+ years in Data Science/ML Engineering with deep experience in LLM-based systems.
• Proven experience building agentic architectures (planner, executor, tool-use, ReAct style).
• Strong background in RAG, embeddings, retrieval optimization, evaluation.

Responsibilities

• Architect and implement multi-agent systems with planning, tool use, and coordinated tasks.
• Design and optimize RAG pipelines including embeddings and retrieval strategies.
• Fine-tune and evaluate LLMs for domain-specific reasoning and summarization.

Skills

Data science

ML engineering

LLM systems

Prompt engineering

Agent architectures

Strategic leadership

Python

Communication

Problem solving

Research

Tools

PyTorch

HuggingFace

LangChain

LlamaIndex

Ray

Kubernetes

Vector databases

AWS SageMaker

BERT

RoBERTa

T5

Job description

• Architect and implement multi agent systems capable of planning, tool use, and coordinated task execution.
• Design and optimize RAG pipelines including embeddings, hybrid retrieval, reranking, and context window strategies.
• Fine tune and evaluate small, medium, and large language models for domain specific reasoning and summarization.
• Develop prompt engineering frameworks, guardrails, and automated evaluation suites for agent reliability.
• Build scalable ML services and APIs for production deployment in distributed environments.
• Collaborate with product, engineering, and domain experts to translate complex workflows into agentic AI solutions.
• Establish best practices for model evaluation, observability, safety, and compliance.
• Mentor DS/ML engineers and contribute to long term AI strategy and architecture.
• 6–12+ years in Data Science / ML Engineering, with deep experience in LLM based systems.
• Proven experience building agentic architectures (planner executor, tool use agents, ReAct style reasoning).
• Strong background in RAG, embeddings, retrieval optimization, and evaluation.
• Expertise in NLP, transformers, deep learning, and model fine tuning.
• Proficiency with PyTorch, HuggingFace, LangChain/LlamaIndex, Ray, Kubernetes, and vector databases.
• Experience designing production grade ML systems with monitoring, evaluation, and observability.
• Strong communication skills and ability to lead technical direction.

Preferred Qualifications

• Experience in enterprise search, knowledge management, or high compliance domains.
• Experience with model distillation, LoRA/QLoRA, PEFT, and model compression.
• Experience building evaluation frameworks for hallucination, grounding, and agent reliability.
• Familiarity with knowledge graphs, symbolic reasoning, or hybrid neuro symbolic systems.
• Publications, patents, or open source contributions in LLMs or agent systems.
• Strong coding skills in Python 7+ years
• Be a natural problem solver, able to take a lead in collaborating to resolve issues
• Proficiency in IDE debugging : VSCODE and PYCHARM
• Have communication skills
• 5+ years of experience in AI and machine learning
• Deep understanding of machine learning algorithms, classification models, diagnostic testing of models
• Experience working directly and Transformer based architectures including BERT, RoBERTa, T5 etc. Nd familiarity with large language models and fine tuning
• Experience with conversational search / semantic search, reinforcement learning, prompt engineering, hallucination mitigation
• Working understanding of the business risks associated with applying LLM (LangChain) in a business
• Experience working with AWS, RAG, SageMaker, SQL