Agent Algorithm Engineer — Los Angeles, CA

Job title: Agent Algorithm Engineer

Location: Los Angeles, California

Employment type: Full-time

Department: App Ecosystem Center — AI Product Team

Reports to: Head of Algorithm

Employment entity: pXMBRTt m.S. entity (direct hire)

About the role

We are building our U.S. engineering team and looking for an algorithm engineer focused on AI agents. You will own algorithm research and quality optimization for our LLM-based applications, including RAG knowledge base optimization, agent planning and reasoning, multi-turn dialogue, tool calling, evaluation, and model selection.

This role balances research and engineering. We expect strong algorithm fundamentals, awareness of the latest advances, and the engineering discipline to ship solutions into production reliably. Your work will directly shape the core experience of our agents.

What you'll do

- Design and implement AI agent algorithms, including RAG, agent planning and reasoning, tool calling, and multi-turn dialogue management

- Optimize LLM prompt strategies, context management, and output quality, and establish reusable prompt engineering practices

- Design and build an agent evaluation system with automated evaluation pipelines and benchmark test sets

- Own model selection, parameter tuning, and inference efficiency, balancing quality, cost, and latency

- Improve RAG retrieval strategies, chunking, recall ranking, and reranking quality

- Research and apply multimodal capabilities, including speech recognition, speech synthesis, image understanding, and text fusion

- Track advances in LLMs and agents, and assess which techniques are worth adopting for our products

- Work with engineering to ship algorithm solutions into production with reliable online performance

- Work with product to translate business needs and user scenarios into algorithm roadmaps

- Adopt AI-assisted coding tools to speed up algorithm research and development

What we're looking for

Must-have

- 3+ years in algorithm research and development, with NLP or LLM project experience

- Solid understanding of LLM fundamentals and application development, with end-to-end delivery experience from design to launch

- Proficient in Python and deep learning frameworks such as PyTorch or TensorFlow

- Hands-on experience with RAG, agents, prompt engineering, or LLM fine-tuning

- Familiarity with vector databases, embedding models, and semantic retrieval

- Strong machine learning and deep learning fundamentals, including Transformer and attention mechanisms

- Experience in algorithm evaluation and experiment design, with a data-driven approach to optimization

- Strong engineering skills: high-quality, maintainable code, and the ability to productize algorithm solutions

- Bachelor's degree in Computer Science, Artificial Intelligence, Mathematics, or a related field, or equivalent practical industry experience

Nice-to-have

- Algorithm experience with agents, chatbots, copilots, or AI assistants

- Familiarity with LangChain, LlamaIndex, AutoGen, CrewAI, or similar agent frameworks

- Hands-on experience with LLM fine-tuning such as SFT, RLHF, DPO, or LoRA

- Multimodal LLM experience with ASR, TTS, or vision language models

- Experience with consumer internet, social, content, AI, productivity, or mobile-first products

- Familiarity with inference optimization such as quantization, distillation, KV cache, or acceleration

- Publications at top conferences such as NeurIPS, ICML, ACL, or EMNLP, or open-source contributions

- Awards in algorithm competitions such as Kaggle or Tianchi

- Professional experience in the United States or another international market

Language

Professional fluency in English (CEFR B2 or above) and professional working proficiency in Mandarin Chinese. You will run meetings, discuss technical plans, and write documentation in both languages, because this role works daily with product and engineering teams in China.

Benefits

- Medical, dental, and vision coverage through Cigna and Kaiser. The company covers 80% of employee medical premiums, 100% of employee dental and vision premiums, and 50% of dependent premiums. Coverage starts after a 90-day waiting period.

- 401(k) participation after a 90-day waiting period.

- 10 days of paid time off and 5 days of paid sick leave per year for full-time U.S. employees.

- Parental leave available from day one for eligible employees, not subject to the 90-day waiting period.

- Annual bonus with a target of one month's salary. Performance is reviewed twice a year and bonuses are paid annually. Bonuses are prorated in the first year.

Work authorization

Candidates must be legally authorized to work in the United States. This role does not provide visa sponsorship.

How to apply

Submit your resume through LinkedIn. Applications are reviewed on a rolling basis, and we will contact candidates who move forward.

Equal opportunity

DGMVdWH is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other characteristic protected by applicable law.