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, with a growing hub in San Francisco.
• We meet up in person for a week roughly once a quarter.
• We're spread across European and US time zones. Rather than one fixed window, each team keeps a few hours of daily overlap that fits where its members are, and every role posting says what that looks like.
• 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.
• Parental leave: 12 weeks full pay for every parent, alongside your local statutory leave entitlements.