Dataframe SDK Engineer

About the role

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