CirclebackSan Francisco, CASenior full-stack engineer building AI-powered meeting notes, search, and workflows at a YC-backed startup. Own ambiguous problems end-to-end across web, desktop, and mobile; set technical direction and raise the engineering bar.
Senior engineer to own end-to-end search, discovery, and recommendations for an expert matching platform, including data indexing, relevance/ranking, knowledge graphs, and LLM-assisted features. Requires 6+ years software engineering experience with strong backend skills and search/recommendation background.
Senior Software Engineer building fraud detection, risk decisioning, and Trust & Safety tooling for a nonprofit fundraising platform. Requires 6+ years experience building fraud/risk systems with strong backend fundamentals and stakeholder collaboration.
Senior Software Engineer building scalable microservices and event-driven platforms for Prove's phone-centric identity verification and fraud detection services. Requires 6+ years experience, strong Java/OOP, cloud, and database skills; prefers Kafka, Flink, React.
Senior full-stack engineer building and scaling a payments and e-commerce platform for game publishers. Requires 5+ years experience with strong React and TypeScript skills, plus experience leading projects.
Senior Software Engineer building scalable backend systems, APIs, data pipelines, and occasional frontend interfaces on a modern Python/Go/React/AWS stack to connect distributed energy resources to energy markets. Requires 8+ years of engineering experience, technical leadership, and passion for decarbonizing the grid.