Senior AI Engineer (Xora Portfolio Company)

Xora Innovation; San Diego (CA); Hybrid; USD 150,000 - 210,000; Full time

Job summary

ELEMYNT, built by Xora Innovation, seeks a seasoned engineer to own LLM-powered systems across production environments. You will design agents, implement tooling, and ensure safe, scalable, and observable services deployed in customer environments.

You will build end-to-end pipelines for model ingestion, evaluation, and deployment, including fine-tuning, retrieval, and robust monitoring in hybrid or on-site settings.

Qualifications

• Bachelor's or Master's in Computer Science or related engineering field and 5+ years shipping production software.
• Strong Python and reliability in async, HTTP and streaming APIs.
• Production experience with prompting, context engineering, tool calling, and structured outputs.
• Hands-on design and shipping of agents: loop, tools, memory, failure handling; LangGraph or equivalent.
• Experience building RAG systems: embeddings, chunking, hybrid search, reranking.
• Experience fine-tuning open-weight models (LoRA/QLoRA) on multi-GPU with curated data.
• Experience with LLM evaluation, guardrails, tracing, and production scoring.

Responsibilities

• Build and ship LLM-powered capabilities end to end from prototype to production.
• Design agents that plan multi-step work with tool calls and structured outputs.
• Create retrieval with embeddings, chunking, and hybrid search for context.
• Fine-tune open-weight models with multi-GPU setups and curated data.
• Develop evaluation loops with automated scoring and regression tracking.
• Instrument model calls and tooling with tracing for cost and reliability.
• Turn LLM capabilities into clean APIs and reusable engineering tooling.

Skills

Python

LLM systems in production

Async APIs

HTTP API design

Testing & code review

LangGraph

JSON Schema / Pydantic

RAG systems

Model fine-tuning (LoRA/QLoRA)

Tracing / observability

Education

Bachelor's or Master's in Computer Science or related engineering

Tools

LangGraph

Pydantic / JSON Schema

vLLM

TGI

SGLang

RAG tooling

Job description

About Elemynt

ELEMYNT is an early-stage startup built by Xora Innovation. We develop applied intelligence that brings AI into the real world. Our platform combines advanced machine learning, high-performance simulation, and modern software engineering to accelerate the design, validation, and deployment of new materials. Our work sits at the intersection of AI, physics, and large-scale computation. The problems are hard, the stakes are high, and the impact is tangible.

About Elemynt

ELEMYNT is an early-stage startup built by Xora Innovation. We develop applied intelligence that brings AI into the real world. Our platform combines advanced machine learning, high-performance simulation, and modern software engineering to accelerate the design, validation, and deployment of new materials. Our work sits at the intersection of AI, physics, and large-scale computation. The problems are hard, the stakes are high, and the impact is tangible.

About The Role

This role owns the LLM systems behind our platform: the agents and fine-tuned models that ship as product, and the engineering that keeps them reliable – evaluation, tracing, and production-quality services. It's deeply hands-on, from model internals to shipped software.

The platform runs inside our customers’ own secure environments: their compute, their cloud, or a hybrid. So the LLM layer has to work with commercial APIs and self-hosted models alike, and carry its own safeguards wherever it lands. Every LLM capability we ship stands on this work.

What You Will Do

• Build and ship LLM-powered capabilities end to end: prototype, evaluate, deploy, and iterate them into production services users rely on.
• Design agents that plan and carry out multi-step work: tool calling, structured outputs, durable state, and the judgment to know when an agent is the wrong tool.
• Build retrieval that gives models the right context: ingestion, chunking, embeddings, hybrid search, reranking.
• Fine-tune open-weight models with LoRA, QLoRA, or full-parameter tuning on multi-GPU, curating the training data and choosing the method by task, compute budget, and target.
• Build evaluation loops that gate what ships: automated scoring, LLM-as-judge, and regression tracking against curated test sets.
• Instrument model calls and tool use with tracing, so quality, cost, and failures stay debuggable in production.
• Turn LLM capabilities into clean APIs and reusable tooling that other engineers build on.

What We Are Looking For

• Bachelor's or Master's degree in Computer Science or a related engineering field, and 5+ years building and shipping production software, including deep hands-on work building LLM-powered systems in production.
• Strong Python and a track record of shipping reliable services: async, HTTP and streaming APIs, testing, code review.
• Production experience with LLMs: prompting and context engineering, tool calling, structured output, and the latency and cost work that keeps them usable.
• Hands-on experience designing and shipping agents: the loop, the tools, context, memory, and where they fail. A framework such as LangGraph or equivalent; structured outputs in Pydantic or JSON Schema.
• Experience building RAG systems: embeddings, chunking, hybrid search, reranking, and a feel for what actually moves retrieval quality.
• Direct experience fine-tuning open-weight models (LoRA, QLoRA, or full-parameter) on multi-GPU, including curating and formatting the training data.
• Experience with LLM evaluation and guardrails: LLM-as-judge or automated scoring, regression tracking, and tracing over agent runs.
• Experience building shared LLM tooling or platform components that other engineers build on, and comfort owning ambiguous systems end to end in an early-stage environment.

NICE TO HAVE

• Self-hosted inference with vLLM, TGI, or SGLang, served behind an OpenAI-compatible interface.
• Interoperability standards for tools and agents, such as MCP.
• Retrieval over structured data: knowledge graphs, hybrid search, reranking at scale.
• LLMs applied to scientific or other technical data; experience making APIs and tool surfaces easy for agents to call reliably.
• Contributions to open-source AI/ML: agent frameworks, eval tooling, RAG, fine-tuned models.

LOCATION

Singapore or United States. We’re hiring in both to reach the right person. Work model is on-site or hybrid, set per location.

CLOSING NOTE

If you don't tick every box but this is clearly your kind of work, get in touch.