Software Engineer - Core Networking

About the role

About Neo4j:

Neo4j is the graph intelligence platform that transforms data into knowledge to power the next generation of intelligent applications and AI systems. It includes enterprise-ready knowledge graphs for accurate, explainable, and governed AI; the most comprehensive, trusted, and easy-to-deploy graph capabilities across any environment and data source; and an unmatched ecosystem trusted by 84 of the Fortune 100 and supported by the world’s largest graph community. Intelligence that works. Results that matter.

Built to work everywhere and integrate with everything across every cloud for dynamic, personalized, and autonomous AI systems. We deliver quicker results, contextual knowledge, and solutions that impact customers and employees across the business.

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.

The Role:

Here at Neo4j, we’re on the lookout for a software engineer to join our Core Networking Engineering Team, where you will primarily work on the Neo4j network server modules. There will also be scope to work on the drivers and their APIs as well as our proprietary binary protocol.

The drivers act as an adapter between the network and client applications. The server modules manage the server side of the conversation, using both HTTP and our binary protocol, Bolt.

Drawing on your deep understanding of network concepts and binary protocols, you will be a key part of influencing the strategic direction for connectivity with Neo4j and the drivers together with our product managers. You will be leading the design of new features and improvements to the protocol whilst taking on feedback from other experts and stakeholders within the company. You will then implement these designs in the server codebase.

As well as software development, you will also have the opportunity to do things like supporting community projects, writing blog posts, and helping with training and other events.

What You'll Need:

We're looking for 5+ years of practical experience in:

Java language, platform and ecosystem

You will ideally have experience and/or an interest in:

Network development (binary protocol specs like Bolt , Frontend/Backend , MongoDB Wire Protocol )

Network packet analysis (e.g., Wireshark)

Distributed system design

API design

Netty

Customer experience and developer community interaction

Concurrency and asynchronous programming

You may have also worked with some of:

Database management systems

Graph Databases

Java Web Development Specifications (JAX-RS)

Docker

System-oriented languages such as: C, C++, Rust or Go

#LI-Hybrid
Why Join Neo4j?

Neo4j is, without question, the most popular graph intelligence platform 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.

Neo4j is one of the fastest-scaling technology companies in this industry. It recently surpassed $200M in annual recurring revenue (ARR), doubling its ARR over the past three years.

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.

84% of the Fortune 100 and 58% of the Fortune 500 use Neo4j. Examples include Boston Scientific , BT Group , Caterpillar , Cisco , Comcast , Department for Education UK , eBay , NBC News , Novo Nordisk , Worldline , and others .

Co-founder and CEO Emil Eifrem has built an amazing culture that prides itself on relationships, inclusiveness, innovation, and customer success.

Countless industry awards . Massive enterprises and individual developers/data scientists love Neo4j. A strong sense of community and ecosystem is built around the platform.

A recent Forrester Total Economic Impact™ Study cited Neo4j as delivering 417% ROI to customers.

Research shows that members of underrepresented communities are less likely to apply for jobs when they don’t meet all the qualifications. If this is part of the reason you hesitate to apply, we’d encourage you to reconsider and give us the opportunity to review your application. At Neo4j, we are committed to building awareness and helping to improve these issues.

One of our central objectives is to provide an inclusive, diverse, and equitable workplace for everyone to develop their potential and have a positive, career-defining experience. We look forward to receiving your application.

Neo4j Values:

Neo4j is a Silicon Valley company with a Swedish soul. We foster collaboration and each of us is empowered to contribute and put our innovative stamp on projects. We hire candidates who reflect the following Neo4j core values:

(we)-[:VALUE]- (relationships) (we)-[:FOCUS_ON]- (userSuccess) (we)-[:THRIVE_IN]- (:Culture {type: [‘Open’, ‘Inclusive’]}) (we)-[:ASSUME]- (:Intent {direction:’Positive’}) (we)-[:WELCOME]- (:Discussions {nature: ‘IntellectuallyHonest’}) (we)-[:DELIVER_ON]- (ourCommitments)

Neo4j is committed to protecting and respecting your privacy. Please read the privacy notice regarding Neo4j's recruitment process to understand how we will handle the personal data that you provide.

More information at www.neo4j.com .

©2026 Neo4j, Inc., Neo Technology®, Neo4j®, Cypher®, Neo4j Bloom™, Neo4j Graph Data Science Library™, Neo4j® Aura™, and Neo4j® AuraDB™ are registered trademarks or a trademark of Neo4j, Inc. All other marks are owned by their respective companies.