Dataframe SDK Engineer

Rerun; Stockholms kommun; Remote; SEK 700,000 - 1,100,000; Full time

Benefits offered by this job

Competitive cash and equity compensation

Six weeks paid vacation

Hardware and software support

Job summary

A data infrastructure company in Stockholm is seeking a DataFrame SDK Engineer to improve the developer experience for querying data. You will work across Python and Rust while collaborating closely with a talented team. Ideal candidates will have experience with Python data APIs and a passion for ergonomic API design. The role offers competitive compensation and flexible remote work options.

Qualifications

• Experience with dataframe-style APIs (e.g. Pandas, Polars).
• Proven ability to take projects from start to finish with limited supervision.
• 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.

Responsibilities

• Build a world-class query and dataframe SDK.
• Work across Python, Rust, and gRPC layers.
• Push performance improvements.
• Contribute documentation for the SDK.
• Collaborate with other engineers on dataset creation.

Skills

Experience building or contributing to Python data APIs

Strong experience in Python

Strong experience in Rust

Experience writing high-performance software

Empathy for developers

Tools

Python

Rust

gRPC

Job description

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