# Altris > Our journey began in 2015 when Ronnie Mogensen, a master’s student at the Ångström Advanced Battery Centre at Uppsala University, came across an enlightening study on sodium-ion batteries by the renowned scientist and Nobel laureate, John B. Goodenough. In search of a cathode for his master’s degree experiments, Ronnie teamed up with his supervisor, Associate Professor Reza Younesi, and material chemistry expert, Associate Professor William Brant. Together, they innovated their first Prussian White process. Append `.md` to the jobs list or any individual job URL for a markdown version (for example https://career.altris.se/jobs.md). ## Open positions - [All open positions](https://career.altris.se/jobs): Browse every currently open job. Also available as markdown at https://career.altris.se/jobs.md and as a JSON Feed with embedded JobPosting data at https://career.altris.se/jobs.json. - [Cell Validation Engineer](https://career.altris.se/jobs/8257854-cell-validation-engineer): Cell Development · Norra Depågatan 2 ## Optional - [People](https://career.altris.se/people): The team behind Altris. - [Departments](https://career.altris.se/departments): Our departments. - [Locations](https://career.altris.se/locations): Office locations. - [Posts](https://career.altris.se/posts): Posts and updates from Altris. - [Team stories](https://career.altris.se/stories): Stories from people who work at Altris. - [Privacy policy](https://career.altris.se/privacy-policy): How candidate data is handled. - [Cookie policy](https://career.altris.se/cookie-policy): Cookie usage and consent. - [Data privacy](https://career.altris.se/data-privacy): Data privacy controls and rights. - [API catalog](https://career.altris.se/.well-known/api-catalog): Machine-readable discovery document for available APIs.