Software Engineer - Vector Index; Core Database

Software Engineer - Vector Index (Core Database)

About Neo4j:

Neo4j is the leader in Graph Database & Analytics, helping organizations uncover hidden patterns and relationships across billions of data connections deeply, easily, and quickly. Customers use Neo4j to gain a deeper understanding of their business and reveal new ways of solving their most pressing problems. Over 84% of Fortune 100 companies use Neo4j, along with a vibrant community of 250,000+ developers, data scientists, and architects across the globe.

At Neo4j, we’re proud to build the technology that powers breakthrough solutions for our customers. These solutions have helped NASA get to Mars two years earlier, broke the Panama Papers for the ICIJ, and are helping Transport for London to cut congestion by 10% and save $750M a year. Some of our other notable customers include Intuit, Lockheed Martin, Novartis, UBS, and Walmart.

Neo4j experienced rapid growth this year as organizations looking to deploy generative AI (GenAI) recognized graph databases as essential for improving it’s accuracy, transparency, and explainability. Growth was further fueled by enterprise demand for Neo4j’s cloud offering and partnerships with leading cloud hyperscalers and ecosystem leaders. Learn more at  and follow us on Linked In .

Our Vision:

At Neo4j, we have always strived to help the world make sense of data.

As business, society and knowledge become increasingly connected, our technology promotes innovation by helping organizations to find and understand data relationships. We created, drive and lead the graph database category, and we’re disrupting how organizations leverage their data to innovate and stay competitive.

Do you like to solve advanced and complex computer science problems? We are looking for a backend engineer with a special interest in database indexes and algorithm development who likes to solve technical challenges and deliver high-quality code to join our newly formed Index team! You will be part of a brilliant, energetic, and fun team of engineers working on building core functionality for the graph database.

You will be part of an international team based in Malmö, Sweden, and London, UK.

• Build and ship features related to index, constraint and schema
• Evolve vector search capabilities to support graph, similarity search and Gen AI use cases
• Design and optimise the indexing subsystem to support complex graph queries and a variety of workloads
• Write high-quality, testable, and efficient code
• Work with real-world scale and performance challenges
• Work together with our product managers to help set the roadmap for the work in the index area going forward.
• Promote new ideas, take an active part in feature discussions and roadmap prioritization
• Integrate research and technologies into the database core
• “Do what you want days” to work on your own product enhancements and integrations

• You have an interest in how indexes in databases work
• You are proficient in algorithm development in general.
• You are proficient in Java or a C-style programming language
• You are humble. Being able to discuss ideas and challenge each other to build better solutions together
• You have good communication skills and a sense of humour!

• Lucene
• Multi-threaded systems
• Performance profiling and optimisation
• Database management systems
• Large codebases

#LI-Hybrid

Why Join Neo4j?

Neo4j is, without question, the most popular graph database in the world. We have customers in every industry globally, and our products are a proven product/market fit. Joining our team is an opportunity to shape the future of data and analytics. Below are just a few exciting facts about Neo4j.

• Raised the biggest funding round in database history ($325M Series F). Backed by world-class investors like Eurazeo, GV (formerly Google Ventures), and Inovia Capital, Neo4j has raised over $600M in funding and is currently valued at over $2Bn. This puts Neo4j among the most well-funded database companies in history.
• Co-founder and CEO Emil Eifrem has built an amazing culture that prides itself on relationships,…