POSH Fleet Services · 13 hours ago
Senior Software Engineer, Backend (AI)
New York, NY
Full-time
Hybrid
Mid, Senior Level
$200K/yr - $225K/yr
3+ years expPosh is a company focused on rebuilding human connection through community-driven platforms. They are seeking a Senior Backend Engineer to join their AI R&D pod, responsible for building scalable systems and implementing AI features to enhance user experiences.
Marine Transportation
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
Build robust frameworks to evaluate the quality of AI systems and manage fine-tuning pipelines to continuously improve model performance
Define, deploy, and manage our AI infrastructure using Terraform
Deeply analyze the tradeoffs between model performance, latency, and cost to make pragmatic, business-aware technical decisions when using managed AI services
Collaborate with our core engineering teams by occasionally working in TypeScript (Node.js) to integrate AI features into our main application
Qualification
Required
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
A passion for shaping 0 1 products in a lean, fast-paced R&D environment where you'll help define new playbooks for AI-native experiences
Preferred
Pragmatic AI/ML Exposure: Familiarity with managed AI services (e.g., Vertex AI, AWS Bedrock), working with LLMs, or building advanced AI systems is a plus
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
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
Company
POSH Fleet Services
POSH Fleet Services (PFS) is a dedicated in-house ship manager with four core pillars of operations - HSEQA, Technical, Procurement and Crewing.
1001-5000 employees
Funding
Current Stage
Late StageCompany data provided by crunchbase