Software Engineering Intern (Summer/Fall… at Cartesian · Cambridge

Summary: Cartesian is building spatial intelligence for indoor environments to drive operational efficiency in the retail industry. They are seeking a Software Engineering Intern for summer/fall 2026 to work on product development, data infrastructure, and machine learning in production, among other responsibilities. Responsibilities: - Product development: Shipping dashboards, APIs, and tools that help retail operations teams make better decisions every day - Data infrastructure: Building efficient pipelines to ingest, process, and serve TB-scale datasets with tight latency and cost constraints - ML in production: Training, deploying, and monitoring ML models that run on mobile devices and cloud infrastructure - Mobile and edge: Design mobile (Android) SDKs that integrate with enterprise PDAs and wireless scanners - Platform reliability: Scaling Kubernetes-based infrastructure on Azure to support rapid international deployment - Indoor positioning at scale: Fusing noisy RFID and computer vision data into accurate, real-time product locations across hundreds of stores Required Qualifications: - Motivated upper-level undergraduates or graduate students - Exceptional engineer: You write clean, effective code and default to simple, maintainable solutions - High ownership: You take problems end-to-end, and make sure they get done - Fast learner: You are a generalist who can tackle unfamiliar problems across our stack (infra, data, ML, APIs) - Team-first: Your decisions center around team success and working towards the best ideas - Backend: FastAPI, Python - Data: Postgres, Blob Storage, Parquet - ML: PyTorch, Ray - Infrastructure: Azure, Kubernetes, Helm - Frontend: Next.js, TypeScript, Tailwind - Mobile: Android, Kotlin Required Skills: Python, FastAPI, Postgres, Blob Storage, Parquet, PyTorch, Ray, Azure, Kubernetes, Helm, Next.js, TypeScript, Tailwind, Android, Kotlin Internship Start Date: Start in 2026 Summer