Backend Software Engineer - Mobile
at Perplexity AI
Posted 11 hours ago
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Perplexity is seeking an experienced Backend Engineer to design, implement, and scale backend systems powering web, mobile, and browser products. The role focuses on a Python-based stack with PostgreSQL, DynamoDB, Redis, and FastAPI. You will build scalable data ingestion pipelines, optimize interfaces with databases and caching, and collaborate with PMs, frontend engineers, and AI/DS teams, while managing a complex orchestration of multiple services. AI is central to what we build, and interview guidance notes that AI tools should not be used unless indicated.
Perplexity is looking for an experienced Backend Engineer to join our small team revolutionizing the way people search and interact with the internet. You will be responsible for leading design, implementation, and scaling of backend systems that power web, mobile, and browser products.
Tech Stack: Python | PostgreSQL | DynamoDB | Redis | FastAPI
Responsibilities
Build scalable systems that ingest and process data from the web, files, and other sources.
Optimize interfaces that interact with databases and caching systems.
Collaborate with PMs, frontend engineers, and other stakeholders to understand product requirements.
Work closely with AI, Search, and Data Science teams to iterate on non-deterministic systems.
Manage a complex orchestration system with many moving parts and interfaces.
Scale, optimize, and load balance multiple services with rapidly changing needs.
Qualifications
Strong experience with Python
Strong experience with databases and caching
Experience with AWS cloud infrastructure at scale
Experience working with high-scale data and non-deterministic systems like LLMs
4+ years of engineering experience
AI is at the heart of what we build, and using it effectively is an expectation for every role here. During interviews, we want to see how you think and make decisions—qualities that will directly influence our AI development. With that in mind, please avoid using AI tools throughout the process unless we indicate otherwise.
