Backend Engineer (Python / FastAPI / SQL)

ppMarvelX builds specialized AI agents for complex and highly regulated domains such as insurance claims, compliance, and enterprise support. Our systems are designed to work in real world environments where accuracy, reliability, and clarity matter. The market is enormous and we are growing quickly. /p pWe are searching for a Backend Engineer who enjoys working close to the data and creating systems that are fast, stable, and thoughtfully structured.

You understand how to design services that move and transform data cleanly, and you care about readability as much as performance. /p pIn this role you will collaborate directly with the founders and engineering leads to shape the core APIs and data pipelines that power our platform. If you like solving intricate problems and building tools others rely on every day, this is a strong fit. /p pThis is not a maintenance role. It is an opportunity to help shape a product at an early and meaningful stage.

If that sounds exciting, we would love to talk. /p h3Mission /h3 pAs Backend Engineer, you will design and build the foundational services behind MarvelX. This includes clean API design, efficient data access layers, and search capabilities that scale. You will work with SQL and Elasticsearch at significant volume, use Python and FastAPI to structure services, and ensure our AI systems have the right data with low latency and high reliability. /p h3What you will work on /h3 ul liDesign and build backend services and APIs using Python and FastAPI /li liCreate and optimize database models and queries in PostgreSQL and other relational systems /li liImplement and tune search and analytics capabilities with Elasticsearch /li liDesign data access layers and caching strategies that maintain performance at scale /li liCollaborate with frontend and AI engineering teams to define clean and intuitive API contracts /li liWrite clear, testable code with strong reliability and observability practices /li liContribute to internal tooling and pipelines that support our data driven products /li /ul h3What you bring /h3 ul liTwo to four years of experience building production backend systems /li liStrong Python skills (FastAPI preferred, experience in Flask or Django is also welcome) /li liDeep understanding of SQL including schema design, query tuning, and transactions /li liExperience with Elasticsearch including mappings and performance tuning /li liAbility to design reliable and well structured REST APIs /li liFamiliarity with authentication, permissions, and structured data handling /li liStrength in debugging, testing, and optimizing performance /li liExperience with async Python, caching layers, or message queues /li liUnderstanding of data engineering or ETL workflows /li liFamiliarity with Docker and deployment pipelines /li liPrevious startup experience and comfort working in fast moving environments /li /ul pIf you are excited by building real systems that power AI in production, we would love to meet you. /p /p