Backend Lead - Python - Dallas, TX

Photon$46K — $162K *
Enterprise Technology
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • 10+ years of professional backend development experience
  • Expert in Python, specifically Asyncio, Pydantic (v2), and Pytest
  • Hands-on experience with production-grade applications using LangChain or similar tools
  • Deep understanding of concurrency with message brokers and task queues like Redis or RabbitMQ
  • Proficient in PostgreSQL and at least one vector database, with optimization skills for AI queries
  • Knowledge of Docker, Kubernetes, and serverless architecture on AWS, Azure, or GCP

Responsibilities

  • Lead the design of multi-agent systems ensuring reliable state transitions
  • Architect high-performance, asynchronous APIs using FastAPI
  • Build secure environments for AI agents to execute code and interact with APIs
  • Oversee integration of vector databases and design memory systems for agents
  • Implement monitoring and logging for agent decision-making
  • Design backend guardrails to secure AI agents from prompt injection
  • Set standards for Python coding and mentor engineering team

Benefits

  • Medical, vision, and dental benefits
  • 401k retirement plan
  • Variable pay or incentives
  • Paid time off
  • Paid holidays
Full Job Description
Job Description

We are looking for a Backend Lead to architect and build the robust infrastructure required to power our Agentic AI products. You will lead the development of the "brain" of our platform-the layer where LLMs are transformed into autonomous agents that can plan, use tools, and solve complex problems.

The ideal candidate is a Python expert who thrives on complex system design, concurrency, and the unique challenges of integrating probabilistic AI into deterministic backend environments.

Key Responsibilities
  • Agent Architecture & Orchestration: Lead the design of multi-agent systems using frameworks like LangGraph, CrewAI, or AutoGen, ensuring agents can transition between states (Planning, Execution, Review) reliably.
  • Scalable API Development: Architect high-performance, asynchronous APIs (primarily using FastAPI) to handle long-polling or streaming connections for AI-generated content.
  • Tooling & Function Calling Infrastructure: Build a secure "sandbox" environment that allows AI agents to execute code, query databases, and interact with third-party APIs safely and efficiently.
  • RAG & Memory Management: Oversee the integration of Vector Databases (e.g., Pinecone, Weaviate, or PGVector) and design "memory" systems that allow agents to retain context across sessions.
  • Observability & Tracing: Implement specialized monitoring and logging (using tools like LangSmith, Arize Phoenix, or OpenTelemetry) to trace agent decision-making and debug "looping" behaviors.
  • Security & Guardrails: Design backend-level guardrails to prevent prompt injection and ensure that autonomous agents operate within strictly defined permission boundaries.
  • Leadership & Mentoring: Set the standard for Python coding excellence, conduct deep architectural reviews, and mentor engineers on the nuances of AI-integrated backend development.

Technical Requirements
  • Python Mastery: 10+ years of professional backend experience, with expert-level knowledge of Asynchronous Programming (Asyncio), Pydantic (v2), and Pytest.
  • AI Frameworks: Hands-on experience building production-grade applications with LangChain or similar orchestration libraries.
  • Concurrency & Task Management: Deep experience with message brokers and task queues (e.g., Redis, RabbitMQ, or Celery) to manage long-running agentic tasks.
  • Database Expertise: Proficiency in PostgreSQL (relational) and at least one Vector Database. Experience in optimizing complex queries for AI retrieval.
  • Cloud Infrastructure: Strong knowledge of Docker, Kubernetes, and serverless architectures within AWS, Azure, or GCP.
  • Design Patterns: Mastery of microservices architecture, event-driven design, and API versioning.

Preferred Qualifications
  • Experience with LLM fine-tuning or local model deployment (vLLM, Ollama).
  • Knowledge of Distributed Systems and handling the "cold start" or latency issues associated with large-scale AI models.
  • Background in Cybersecurity, specifically regarding autonomous systems and API security.


Compensation, Benefits and Duration

Minimum Compensation: USD 46,000
Maximum Compensation: USD 162,000
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

About Photon

Photon Careers

Joining Photon presents an unparalleled opportunity to advance one's career with a leader in digital innovation. Photon is actively seeking talented individuals to join its diverse team of professionals, dedicated to reshaping industries through technology and creativity.

Explore Job Opportunities

Photon offers a variety of job opportunities that cater to a range of skills and interests. Each position at Photon is designed to challenge team members while providing meaningful pathways for professional and personal growth.

Experience the Culture and Benefits

Photon is committed to fostering a workplace culture that promotes diversity and inclusion. The company provides comprehensive benefits designed to support the health, well-being, and financial security of each team member. At Photon, every professional enjoys access to career development programs and diversity training, ensuring they are equipped for leadership roles in an evolving marketplace.

Engage in Professional Growth

Photon believes in the power of innovation and leadership to drive success. The company supports its team members with resources for continuous learning and growth, including advanced training sessions and leadership workshops. Networking within Photon’s industry-leading community allows for unparalleled career advancement and skill enhancement.

Internship Programs

For those beginning their professional journey, Photon offers internship programs that provide a robust foundation in digital solutions. Internships at Photon are characterized by immersive projects and hands-on learning, guided by experts in various fields. These programs are a gateway to full-time employment and a promising career path.

Join the Team

Photon is hiring! Explore open positions that match your skills and interests. Photon looks for passionate, curious, creative, and solution-driven team players. Whether you are starting your career or looking to make a significant impact in your professional journey, Photon has a place for you.

Prepare for Your Interview

Photon values a thorough selection process. Prospective team members are encouraged to prepare by understanding the company’s mission and values. Tailoring your resume to highlight relevant experience and skills will make a significant difference. Engage actively during your interview, demonstrating your knowledge and enthusiasm for the role you are applying for.

Stay Connected

Keep up to date with the latest from Photon by following the company’s career blog. Gain insights from insiders, learn about new job openings, and get tips on preparing your resume and acing your interview.

Career Development at Photon

Photon is dedicated to the professional development of its team members. The company offers various tools and resources, including career coaching and performance feedback, to help individuals reach their full potential. With Photon, career aspirations are nurtured, encouraging every team member to excel and innovate in their respective roles.

Networking and Career Opportunities

Photon encourages its team members to engage in networking within the company and the broader industry. These connections can lead to myriad opportunities, from collaborative projects to mentorship. Networking at Photon is not just about building professional relationships; it's about fostering a community of innovation and mutual growth.

Conclusion

Photon is not just a company; it is a community of driven professionals committed to making a difference. With a focus on innovation, leadership, and diversity, Photon offers a dynamic environment where ambitious individuals can thrive. Explore the possibilities and join Photon’s team of leaders, innovators, and visionaries.
Learn more about Photon

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