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Photon

Builds custom software and AI for big companies

Python Developer

AI Application Engineering +1Confirmed live in the last 24 hours
Full-timeUnited States

About the Job

Requirements

  • Six to nine years of software development experience with strong Python expertise.
  • Hands-on experience with Python frameworks such as FastAPI, Flask, or Django.
  • Strong experience developing REST APIs, microservices, and backend applications.
  • Experience with agentic AI frameworks such as LangGraph, CrewAI, AutoGen, Agent Development Kit (ADK), or similar technologies.
  • Experience building and supporting Retrieval-Augmented Generation (RAG)-based applications and AI-powered solutions.
  • Hands-on experience with LangChain, LlamaIndex, LangSmith, or LangFlow.
  • Working knowledge of large language models, including OpenAI, Gemini, Anthropic, Llama, or equivalent models.
  • Strong understanding of prompt engineering, function calling, tool integration, and agent orchestration patterns.
  • Experience with vector databases such as Pinecone, Weaviate, Chroma, or Milvus.
  • Proficiency in relational databases such as PostgreSQL and MySQL, and NoSQL databases such as MongoDB and Redis.
  • Experience with cloud platforms such as AWS, Azure, or Google Cloud Platform.
  • Familiarity with Docker, Kubernetes, and containerized application deployments.
  • Experience working with continuous integration and continuous delivery pipelines and tools such as Jenkins, GitHub Actions, or GitLab CI.

Responsibilities

  • Design, develop, and maintain scalable backend services, APIs, and platform components using Python and related frameworks.
  • Build and implement agent orchestration workflows using frameworks such as LangGraph, CrewAI, AutoGen, or similar technologies.
  • Integrate and optimize large-language-model-powered capabilities using OpenAI, Gemini, Anthropic, and open-source models.
  • Develop and maintain Retrieval-Augmented Generation solutions leveraging enterprise knowledge bases and vector databases.
  • Create tools, connectors, and APIs that enable agents to interact with databases, business systems, and third-party applications.
  • Contribute to scalable, resilient, and secure AI platform capabilities that support enterprise deployments.
  • Develop testing strategies and evaluation frameworks to measure agent accuracy, reliability, performance, and effectiveness.
  • Optimize AI workflows, token utilization, model selection, and infrastructure to improve latency and cost efficiency.

About the Company

Photon

Builds custom software and AI for big companies

Photon designs, builds, and runs custom software for large companies, combining an in-house creative agency with its own engineering teams. Its flagship client work includes rebuilding Samsung's US online store as a set of smaller linked services and creating Olive Garden's mobile app, which lets diners join the waitlist from their phones instead of waiting at the door. Clients hire Photon's teams to plan and code their apps, websites, and AI tools and to keep them running afterward, paying for the engineers and designers assigned to each project. Photon is privately held and based in London, with its US arm in Dallas and engineering centers in Chennai and Bengaluru.

Company size
5,001-10,000
Company stage
Not listed
Total funding
Not listed
Headquarters
London, United Kingdom
Founded
Not listed

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