Dataframe SDK Engineer

At Rerun, we’re building the data stack for Physical AI. Large parts of the physical-world economy will be transformed by intelligent products, and we're developing the data infrastructure and tools that make it possible. Our open-source project focuses on logging and visualizing multimodal data and is already loved by some of the best teams in the world. We’re now building our commercial platform — managed infrastructure for ingesting, storing, analyzing, and building training data pipelines for Physical AI at scale. We’ve built an exceptionally senior, talented engineering team. Now we’re looking for a DataFrame SDK Engineer to own and expand the developer experience for querying and working with Rerun’s data — improving performance, ergonomics, and integrations across our Python and Rust SDKs. This role sits at the intersection of API design, query performance, and developer experience, and will have a direct impact on how customers adopt and build on top of Rerun Cloud. WHAT YOU’LL DO - Build a world-class query and dataframe SDK that makes exploring data in Rerun intuitive and powerful - Work across Python, Rust, and gRPC layers to add new operations and integrate with our distributed backend services - Push performance improvements through better query planning, push-down logic, and dataset versioning - Contribute documentation and examples that make the SDK easy to adopt - Collaborate with other engineers on dataset creation, versioning, and catalog interfaces WE’D LOVE IT IF YOU HAVE - Experience building or contributing to Python data APIs, ideally dataframe-style APIs (e.g. Pandas, Polars, Arrow, Snowflake, or similar) - Strong experience in Python and Rust, or a language-agnostic background with proven ability and motivation to pick up Rust rapidly. - Experience writing high-performance software and debugging across Python, Rust, gRPC, and distributed systems - Proven ability to take projects from start to finish with limited hand-holding — you’re comfortable owning a slice of the stack and iterating quickly - Empathy for developers and a sense of taste for clean, ergonomic API design BONUS POINTS IT IF YOU HAVE - Experience with Apache Datafusion or Apache Arrow - Familiarity with query planners, compilers, or execution engines - Experience working on data-oriented or multimodal data systems (e.g., robotics, physics modeling, or simulation pipelines) - Knowledge of async Rust or similar concurrent programming models HOW WE WORK AT RERUN - We're a remote company headquartered in Stockholm, Sweden. - We meet up in person for a week roughly once a quarter - The team you'll join has members in European and US-East Coast timezones - You should be available for synchronous work between 1:30–5:00pm CET. Given our current team distribution, candidates outside of Europe or the US will be considered on a case-by-case basis to ensure there’s enough overlap for effective collaboration. - We've put together an uncommonly talented tech team, value agency and helpfulness highly, and expect everyone to take broad responsibility for what they build - We offer competitive cash and equity compensation, six weeks paid vacation, and whatever hardware and software you need to do your job