FastAPI Jobs - December 2025

TechStars NYC ’24 startup modernizing home healthcare with AI. Hands-on senior IC role working on ML/NLP and LLM-native data engineering problems, devops, data engineering, evals & benchmarking, workflow optimization; close collaboration with core engineering…

Ionworks builds battery simulation and optimization software used by R&D teams designing next-generation batteries. Seeking a founding backend/systems engineer to own large pieces of the backend and help scale from early customers to broader industry use. Wor…

Founding-team role building Cofounder, an autonomous agent platform to run end-to-end business workflows. Own the end-to-end agent experience, build and scale Flows and Integrations, and ship across the stack with a focus on performance and reliability. High …

YCharts is hiring full-stack software engineers for the Applied AI team to build AI-driven features and workflows using frontier LLMs. The role focuses on AI agents and tools that analyze portfolio allocations, build financial charts, screen funds, and produc…

Rapport is an AI-driven company fixing healthcare payment infrastructure by ingesting contracts, claims, and policies to provide real-time pricing intelligence. Role 1 (Founding AI Engineer): build production pricing engines, design data pipelines for PDFs/CS…

Blackshark AI builds a scalable AI platform for satellite and drone imagery enabling custom model training on global features to deliver real-time geospatial insights. Founded in 2020 and backed by $35M Series A from investors including Microsoft M12, Point72…