Senior Software Engineer, Backend (AI)

About this role

About Posh
We are all social creatures, but the dominant “social” companies today have evolved into digital loneliness machines, driving isolation, anxiety, and mental health challenges around the world.


Human connection is lost. Posh is a beacon guiding us back.


Posh enables anyone to build an IRL community based on shared interests, while connecting consumers with the communities of people just like them. Founded by event organizers who were frustrated with the growing loneliness epidemic and the tools available to build their own event brand, we’ve built the ultimate platform for launching, monetizing, and finding IRL communities of people just like you. In just 6 years, Posh has grown to a team of 70, expanded to 8M+ users, secured $70m in venture funding, and facilitated over $350M in transactions.


About The Role
We're looking for a
Senior Backend Engineer
to join our AI Platform team, a small, fast-moving group building the backend infrastructure that powers AI-native product experiences at Posh.


This is a
backend systems and infrastructure role
. You'll design, build, and scale the services, APIs, and cloud infrastructure that our AI features run on. You won't be training models. You'll be building the reliable, performant platform that makes our AI products work in production.


Your work will include architecting data flows, building evaluation pipelines, deploying containerized services, and integrating AI capabilities into our core product. You'll collaborate closely with frontend engineers and product managers to ship experimental features to a large, highly engaged user base.


What You'll Do

• Design and Scale Backend Services: Build and maintain scalable backend services and APIs that power AI-driven features, writing production code primarily in Java, and Python.
• Own Cloud Infrastructure: Define, deploy, and manage AI infrastructure using Terraform on a major cloud platform (AWS). Scale contain...