> Markdown version of [/jobs/ext/4622179-ai-engineer-5-ai-foundations-llm-customization-finetuning-reinforcement-learning](https://www.wearedevelopers.com/jobs/ext/4622179-ai-engineer-5-ai-foundations-llm-customization-finetuning-reinforcement-learning). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# AI Engineer 5 (AI Foundations: LLM Customization, Finetuning, Reinforcement Learning)

- **Company:** Capital One Financial Corporation
- **Location:** Rancho Cucamonga, CA, United States
- **Experience:** Experienced
- **Salary:** $229,900 - $262,400
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Artificial Intelligence, Amazon Web Services, Microsoft Azure, C Sharp (Programming Language), C++ (Programming Language), Nvidia CUDA, Computer Programming, Computer Engineering, Python (Programming Language), Reinforcement Learning, Private Cloud Environment, Google Cloud, Transfer Learning, Large Language Models, Information Technology, Low Latency, Model Inference, Golang
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25196_40cb609b53aac578d17947122eb76696

## About the Role

You love asking questions and digging deep to uncover the root of problems and can articulate your findings concisely with clarity.
You have the courage to share new ideas even when they are unproven* You are deeply Technical.
You possess a strong foundation in engineering and mathematics, and your expertise in hardware, software, and AI enables you to see and exploit optimization opportunities that others miss* You are a resilient trailblazer who can forge new paths to achieve business goals when the route is unknown****Basic Qualifications:***** Bachelor's degree in Computer Science, AI, Electrical Engineering, Computer Engineering, or related fields plus at least 6 years of experience developing AI and ML algorithms or technologies, or a Master's degree in Computer Science, AI, Electrical Engineering, Computer Engineering, or related fields plus at least 4 years of experience developing AI and ML algorithms or technologies* At least 6 years of experience programming with Python, Go, Scala, CUDA, or Java****Preferred Qualifications:***** Experience leading development AI systems with tradeoff decisions around cost, latency, throughput and accuracy* 7 years of experience
deploying scalable and responsible AI solutions on cloud platforms (e.g.
AWS, Google Cloud, Azure, or equivalent private cloud)* Experience designing, developing, delivering, and supporting complex AI systems* Experience developing AI and ML algorithms or technologies (e.g.
LLM Inference, Similarity Search and VectorDBs, Guardrails, Memory) using Python, C++, C#, Java, CUDA, or Golang* Experience developing and applying state-of-the-art techniques for optimizing training and inference software to improve hardware utilization, latency, throughput, and cost* Experience in building agentic AI systems and agentic workflows* Passion for staying abreast of the latest AI research and AI systems, and judiciously apply novel techniques in production* Excellent communication and presentation skills, with the ability to articulate complex AI concepts to peers* Experience architecting and integrating heterogeneous AI systems - including rule-based, retrieval-augmented, and generative components - into unified production pipelines* Experience defining and enforcing standards for ethical AI deployment, including explainability, fairness, and human-in-the-loop review processes* Demonstrated ability to balance model performance and operational cost through
dynamic inference strategies and model compression* Experience right-sizing models, instance counts, and hardware types given requirements (e.g., context length, token inputs, token outputs)***Capital One will consider sponsoring a new qualified applicant for employment authorization for this position.***The minimum and maximum full-time annual salaries for this role are listed below, by location.
Please note that this salary information is solely for candidates hired to perform work within one of these locations, and refers to the amount Capital One is willing to pay at the time of this posting.