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# Principal Software Engineer

- **Company:** Elastic
- **Location:** Spain
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Program Optimization, Continuous Integration, Data Structures, Software Debugging, Elasticsearch, Information Retrieval, PostgreSQL, MongoDB, Search Technologies, Software Engineering, Apache Solr, Data Storage Technologies, Cassandra, Free and Open-Source Software, Codebase, Software Version Control
- **Published:** August 11, 2026
- **Apply:** https://es.trabajo.org/oferta-4021-58d140437918889862a706ee12206a53

## About the Role

Professional experience with vector similarity and vector databases, and you used HNSW, IVF, or other relevant algorithms and libraries on search platforms at scale. - You have strong skills in core Java and are conversant in the standard library of data structures and concurrency constructs, as well as other features like lambdas. - You work with a high level of autonomy, and are able to take on projects and guide them from beginning to end. This covers both technical design and working with other engineers to develop needed components. - You're comfortable developing collaboratively. Giving and receiving feedback on code and approaches and APIs is hard Bonus points if you've collaborated over the internet because that's harder. Double bonus points for asynchronous collaboration over the internet. That's even harder, but we do it anyway because it's the best way we know how to build software. - You've used several data storage technologies like Elasticsearch,
Solr, PostgreSQL, MongoDB, or Cassandra and have some idea how they work and why they work that way. - You have excellent verbal and written communication skills. Like we said, collaborating on the internet is hard. We try to be respectful, empathetic, and trusting in all of our interactions. And we'd expect that from you too. - You have a proven track record of using AI to accelerate development, debug complex systems, and optimize code, while still owning the final outcomes. - You possess the ability to collaborate across functions and teams and seamlessly transition between different projects, codebases, or teams based on business priorities - You work autonomously and can drive decisions and results in a distributed team by leveraging asynchronous, direct, and transparent communication. Bonus Points - You've built things with Elasticsearch before. - You've worked with open source projects and are familiar with different styles of source control workflow
and continuous integration. - Experience with data storage technology. - You have experience designing, leading and owning cross-functional initiatives

## Description

algorithm or data structure. Or find one and implement it. Sometimes you'll need to get close to the operating system and hardware. - Work with a globally distributed team of experienced engineers focused on the vector search capabilities of Elasticsearch. - Be an expert on how Elasticsearch implements vector similarity in support of search relevance and everyone will turn to you when they have a question about this area. You'll improve this area based on your questions and your instincts. - Work with community members from all over the world on issues and pull requests, sometimes triaging them and handing them off to other experts and sometimes handling them yourself. - Write idiomatic modern Java -- Elasticsearch is 99.8% Java What You Bring Along - You have implemented novel techniques in vector similarity on a search platform with a large user base or progressed the field of academic research in vector similarity information retrieval. -


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