Posh
Senior Software Engineer, Backend (AI)
New York City · Senior
Sponsorship not specifiedDetected 162 days ago
TypeScriptPythonNode.jsBackend DevelopmentFull-Stack DevelopmentAWSGCPAzureCloud PlatformsTerraformMachine LearningData EngineeringLLMsRAGMLOpsLangGraph
About the role
- This is a backend-focused role with a strong emphasis on systems architecture and AI implementation.
- You'll work closely with frontend engineers and product designers to bring cutting-edge AI tools to our platform.
- This is a 5 day a week commitment at our NYC office in SoHo.
Responsibilities
- Design, build, and maintain scalable backend services and APIs for AI-powered features, writing primary production code in Python.
- Move beyond standard RAG to design and implement complex, hierarchical Multi-Agent Systems that can perform sophisticated, multi-step tasks.
- Collaborate with our core engineering teams by occasionally working in TypeScript (Node.js) to integrate AI features into our main application.
- The companies that integrate AI directly into their product to create visible, daily value will define the next generation of consumer software.
- We're here to lead our category with a product that feels intelligent, personal, and effortlessly useful.
- Expect to build robust APIs, architect data flows for evaluations and fine-tuning, and pioneer new ways to leverage AI within our existing infrastructure.
- This represents a unique opportunity to build the foundational backend of our AI products, with the chance to ship experimental features to a large, growing, and highly engaged user base.
- Posh enables anyone to build an IRL community based on shared interests, while connecting consumers with the communities of people just like them.
Requirements
- 3-6+ years of backend or full-stack engineering experience, with a proven track record of shipping high-quality, scalable systems in fast-paced environments.
- Deep expertise in Python and its ecosystem for web services and data processing.
- Strong experience with Infrastructure as Code (Terraform), a major cloud platform (e.g., GCP, AWS, Azure), and deploying containerized applications.
Nice to have
- Experience with open-source agentic frameworks (e.g., LangGraph, CrewAI, Strands, etc) is a plus.
- Experience with MLOps, data engineering, or a background in consumer, marketplace, or event-driven platforms.
- Experience with model evaluation frameworks (e.g., RAGAs, LangSmith, DeepEval) or fine-tuning is helpful but not required.
- The ability to think about tradeoffs between cost, latency, and performance is valuable.
Compensation
- This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.
Benefits
- We are all social creatures, but the dominant "social" companies today have evolved into digital loneliness machines, driving isolation, anxiety, and mental health challenges around the world.
Company info
- At Posh, we're not here to build infrastructure for others.
Equal opportunity
- Please let us know if you need assistance or accommodation due to a disability
This listing is sourced directly from Posh's careers page and normalized into a canonical job model.