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GenAI/Python Developer – AI/ML

Photon Interactive UK Limited
New York, NY Posted Oct 14, 2026
On-siteUSD 155,000 - 217,000 / year

About this role

GenAI/Python Developer – AI/ML

We are looking for an experienced GenAI/Python Developer to design, build, and deploy production-grade Generative AI applications and intelligent agent-based solutions. The ideal candidate will have strong expertise in Python, LangGraph, LangChain, LlamaIndex, RAG, vector databases, LLM integration, and multi-agent architectures.

The role requires hands-on experience building scalable AI solutions, integrating commercial and open-source LLMs, fine-tuning models, and optimizing GenAI applications for performance, latency, cost, reliability, and production scalability.

Key Responsibilities

  • Design, develop, and orchestrate sophisticated Generative AI workflows using LangGraph, LangChain, and multi-agent architectures.

  • Build and maintain advanced Retrieval-Augmented Generation (RAG) solutions using LlamaIndex and vector databases.

  • Design retrieval pipelines focused on improving the accuracy and relevance of LLM-generated responses.

  • Integrate and evaluate multiple commercial and open-source LLMs, including OpenAI, Anthropic, Llama, and Mistral, based on application, performance, and cost requirements.

  • Develop scalable and high-performance backend services and APIs using Python, FastAPI, and asynchronous programming.

  • Fine-tune and customize LLMs for domain-specific use cases using PyTorch, TensorFlow, Hugging Face, LoRA, and QLoRA.

  • Apply advanced prompt engineering techniques to improve LLM response quality and application performance.

  • Optimize GenAI workflows for latency, cost, scalability, and reliability.

  • Implement monitoring and observability for LLM applications using tools such as LangSmith and Langfuse.

  • Containerize AI applications and services using Docker and support production deployments through CI/CD pipelines.

  • Deploy and maintain GenAI solutions across cloud environments such as AWS, Azure, or GCP.

  • Collaborate with engineering, AI/ML, architecture, and product teams to convert business requirements into scalable AI solutions.

  • Troubleshoot and optimize production AI applications, APIs, retrieval pipelines, and model integrations.

  • Compensation, Benefits and Duration

  • Minimum Compensation: 155,000 USD

  • Maximum Compensation: 217,000 USD

  • Compensation is based on actual experience and qualifications of the candidate. The above is a reasonable and a good faith estimate for the role.

  • Medical, vision, and dental benefits, 401k retirement plan, variable pay/incentives, paid time off, and paid holidays are available for full-time employees.

  • This position is not available for independent contractors

  • No applications will be considered if received more than 120 days after the date of this post.

  • Apply Now

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