Senior Software Engineer Jobs - December 2025

Cambridge Cognition is a small/medium company focused on cognitive and speech assessments for clinical trials. Role: Senior Full Stack Software Engineer working on the core assessment platform and end-user applications. Technologies and environment include No…

Coder is an AI software development company focused on autonomous coding agents and human developer collaboration. They offer a self-hosted Cloud Development Environment (CDE) for secure, governed developer workspaces that improve productivity, reduce cloud c…

Rover is the world’s largest online marketplace for pet care, connecting pet parents with sitters and walkers. The company is building a global platform combining technology, community, and care for animals, with offices in Seattle and Barcelona. They are sca…

We are a bootstrapped, profitable startup leveraging stochastic optimization / operations research (OR), simulation, and machine learning to optimize decisions at scale in complex supply chains and transport networks. What we love: Scala and Nix, principled a…

Bloomberg is hiring a Senior Software Engineer for a hybrid role in NYC to modernize and unify Bloomberg's authentication landscape. The team builds infrastructure for identity verification and authentication, creating fast, resilient, highly available system…

Vantage is an a16z-backed FinOps / Cloud Cost Management platform serving 15,000+ organizations. Ruby on Rails shop headquartered in NYC and US-remote friendly (no international remote). Hiring Senior/Staff Software Engineers (full-time) to work on infrastruc…