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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - Graphaware Hume - **Company:** Neo4J - **Location:** Barcelona, Spain - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Multitier Architecture, Application Programming Interfaces (APIs), Artificial Intelligence, Application Performance Management, Mobile Application Development, Cloud Computing, Software Debugging, Distributed Systems, Graph Database, Human-Computer Interaction, PostgreSQL, Neo4j, Open Web Application Security, Performance Tuning, Software Engineering, Systems Integration, Test-Driven Development (TDD), Large Language Models, Software Security, Backend, Event Driven Architecture, Containerization, Deployment Automation, Data Analytics, Apache Kafka, Data Management, Asynchronous Programming, Api Design, Restful APIs, Domain Driven Design, Docker - **Published:** September 16, 2026 - **Apply:** https://www.buscojobs.com.es/senior-software-engineer-graphaware-hume-en-barcelona-ID-370602898 ## About the Role Proven experience in backend systems (8+ years) with exposure to large-scale, complex applications and cross-functional teams Fluency in Java, with a deep understanding of modern software engineering principles, including: Clean Architecture, Domain-Driven Design (DDD), and Test-Driven Development (TDD) Advanced debugging and profiling techniques, Writing composable, maintainable, and testable code Spring or similar frameworks with emphasis on building secure, modular, and scalable APIs Experience designing data models, both relational (e.g., PostgreSQL) and ideally graph-based (Neo4j or similar) Working knowledge of modern CI/CD pipelines, containerization (Docker), and automated deployment workflows Strong security mindset, with practical knowledge of secure software design and common vulnerabilities (e.g., OWASP) Comfortable with remote team collaboration, i.e. tools and practices for asynchronous communication Bonus Points For Familiarity With Graph technologies: Cypher, Neo4j, knowledge graph Event-driven architectures, Kafka, or distributed systems Cloud-native development, observability, and performance tuning Experience working with LLMs or integrating AI/ML into production systems #J-*****-Ljbffr ## Description About Neo4jNeo4j 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.Our VisionAt 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 TeamProduct Engineering at Neo4j GraphAware offers a unique opportunity to build real-world intelligence systems that matter.We are aiming to hire someone in the the UK, Czechia or Italy.Build with purpose: Your code will help law enforcement and analysts save lives and protect communities through better data insight.Innovative tech: Work with knowledge graphs, workflow engines, LLMs, and graph-native UIs pushing the boundaries of data analytics.Shape the future: Contribute to product direction and technical vision alongside a senior engineering team.True autonomy: Own your work, from ideation to deployment, in a remote-first team.Global mindset: Collaborate with a world-class team of engineers, data scientists, and product thinkers across Europe and beyond.Growth without bureaucracy: Develop your skills in a non-micromanaged, excellence-driven environmentThe RoleAs a Senior Software Engineer, you will shape the core intelligence of GraphAware Hume, our graph-powered analytics platform.Your Responsibilities Will IncludeBuilding APIs for intuitive user interaction with complex dataDesigning secure, scalable access control systems for mission-critical environmentsOrchestrating workflows to automate graph analytics, inference, and real-time insightsOptimizing application performance and collaborating with other engineers to ensure seamless user experiencesContributing to architecture and technical design with the teamWhat you must know already and be excited to grow furtherProven experience in backend systems (8+ years) with exposure to large-scale, complex applications and cross-functional teamsFluency in Java, with a deep understanding of modern software engineering principles, including:Clean Architecture, Domain-Driven Design (DDD), and Test-Driven Development (TDD)Advanced debugging and profiling techniques,Writing composable, maintainable, and testable codeSpring or similar frameworks with emphasis on building secure, modular, and scalable APIsExperience designing data models, both relational (e.g., PostgreSQL) and ideally graph-based (Neo4j or similar)Working knowledge of modern CI/CD pipelines, containerization (Docker), and automated deployment workflowsStrong security mindset, with practical knowledge of secure software design and common vulnerabilities (e.g., OWASP)Comfortable with remote team collaboration, i.e. tools and practices for asynchronous communicationBonus Points For Familiarity WithGraph technologies: Cypher, Neo4j, knowledge graphEvent-driven architectures, Kafka, or distributed systemsCloud-native development, observability, and performance tuningExperience working with LLMs or integrating AI/ML into production systems#J-*****-Ljbffr ## Related Videos - [Graphs and RAGs Everywhere... But What Are They? - Andreas Kollegger - Neo4j](https://www.wearedevelopers.com/videos/1311-graphs-and-rags-everywhere-but-what-are-they-andreas-kollegger-neo4j) - [Putting the Graph In GraphQL With The Neo4j GraphQL Library](https://www.wearedevelopers.com/videos/257-putting-the-graph-in-graphql-with-the-neo4j-graphql-library) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Cyber Sleuth: Finding Hidden Connections in Cyber Data](https://www.wearedevelopers.com/videos/893-cyber-sleuth-finding-hidden-connections-in-cyber-data) - [Your organization as a Graph](https://www.wearedevelopers.com/videos/2051-your-organization-as-a-graph) ## Related Articles - [Everything a Developer Needs to Know About MCP with Neo4j](https://www.wearedevelopers.com/magazine/604-everything-a-developer-needs-to-know-about-mcp-with-neo4j) - [Graph and AI Trends 2026: Why Is AI Running but Not Yet Delivering?](https://www.wearedevelopers.com/magazine/680-graph-and-ai-trends-2026-why-is-ai-running-but-not-yet-delivering) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs)