Senior Java Developer (Software Engineer) (f/m/x)- Core

Graylog: Empowering Threat Detection, Investigation, & Response Solutions with Cutting-Edge Technology Graylog specialises in delivering top-notch Threat Detection, Investigation, & Response (TDIR) solutions, backed by our latest addition, the Graylog API security platform. As a renowned centralised log management (CLM) and Security Information Event Management (SIEM) provider, we offer unparalleled fast and efficient log analysis capabilities in critical areas such as security, compliance, operations, and DevOps. Our enterprise solution enables organisations globally to capture, store, and analyse terabytes of machine data in near-real time while our open-source product has been deployed in more than 50,000 installations worldwide, empowering individuals and small teams to perform basic log consolidation, analysis, and search functions at no cost. We're a remote-friendly company with locations in Hamburg, Munich, London, Boulder, and headquarters in Houston, TX. If you live near an office and want to be part of said office great.  Nearish to an office and want to have the ability to hot desk? No problem, and if you're not near an office and wish to work remotely, all good! Recent achievements for Graylog have been inclusion in the 2021 Deloitte Technology Fast 500™, we took home two of the most prestigious cybersecurity awards in SIEM and DevSecOps from Cyber Defence Magazine at RSA in 2023, and 2024 saw us take home gold and become the Globee Winner for Security Information & Event Management and the 2024 Globee Winner for Threat Hunting, Detection, Intelligence, and Response. Graylog was named a “Leader” and “Fast Mover” in GigaOM’s 2024 Radar Report for SIEM and 2025 has seen Graylog recognized in BuiltIn’s 2025 Best Places to Work list.
Graylog is currently recruiting for a Senior Java Developer to join our engineering organisation during an exciting period of growth.
The Senior Java Developer (everyone is a Software Engineer here by the way) will focus on the backend of our core solutions Graylog Open & Graylog Enterprise, both on-prem and in the cloud with your team. 
You will collaborate with peers on needed requirements for the product and design and even get into the architecture when needed. 
Java will be your preferred language (among others) , and you will be passionate about taking a sense of pride in designing, developing, and maintaining high-quality code using Java technologies.
As a Senior Java Developer here at Graylog, you will have the opportunity to make a significant contribution and impact on our products. Your work can and will have a huge impact on our user’s experience.
By joining Graylog, you will be part of a dedicated team that, despite working primarily remotely, values connections and likes to spend time, grow, and learn from one another. 
Work as you prefer: This position can be based anywhere in Germany (we have offices in Hamburg & Munich) and will report to our Engineering Director based in Hamburg, Germany.

Additional responsibilities will include but are not limited to;

• Work on the backend of the Graylog products in Java together with your team. 
• Lead the design, implementation, and delivery of successful large-scale, critical and/or highly complex software.
• Focus on data management, performance optimization, authentication, permission handling, scheduling, and architecture. 
• Adapt and improve core elements of Graylog to fit well into on-premises and cloud environments. 
• Implementation of OpenSearch management features from within Graylog. 
• Backend design, code reviews, automated tests. 
• Coach and mentor your peers. 

Some of the technology we use at Graylog;

• Java, OpenSearch, ElasticSearch, and MongoDB on Linux
• Maven, IntelliJ, Git, Github, Jenkins

Key Deliverables;

• Within the first 2 months you can expect to complete smaller issues and fix minor bugs to learn about our processes. You’ll have your work reviewed by an experienced core engineer and merged to contribute to the product. 
• In the first half year, you’ll start working on your first feature project together with peers from the team. You’ll learn about a specific area of the code and actively contribute to its implementation whilst sharing your progress with the team regularly.
• Within 6-12 months you’ll have your first feature project merged into a release and actively contribute to the release process (by supporting our testing, sharing information, etc.). 

A little bit about you;

• 4+ years of professional programming experience, at least in one challenging project.
• Experience producing high-quality Java-based application code.
• Relevant experience in other programming languages (e.g. Golang would be advantageous).
• Experience with OpenSearch/ElasticSearch or another search technology in a production environment.
• Ideally experience with the OpenSearch/ElasticSearch API, Mappings and Index templates.
• Preferably knowledge of web and enterprise environments. Practical experience in the maintenance of an Open-Source project would be ideal.
• Proficient English communication skills.
• Willingness to occasionally travel to our Hamburg, Germany office. 

Just some of the reasons why to join Graylog;

• Opportunity to work with a globally distributed and diverse team
• Grow and develop professionally and personally in a fast-growing environment
• Choice of latest equipment to help you succeed
• Monthly allowance to support your commute costs and support outfitting your work-from-home environment

Here at Graylog, you'll find a diverse group of experienced professionals who love to have fun while meeting the needs of our customers with the best solution and customer service available.
Our values
Openness- As a global company, we encourage our people to bring their backgrounds, ideas, and perspectives to our collective work. We lead with integrity and are committed to doing what is best for the Graylog community.
Collaboration- Through mutual respect, trust, and candid communication across all teams, we deliver the best ideas and results.
Useful Innovation- We take calculated risks to find new ways to innovate. By continuously improving ourselves, processes, and technologies, we deliver the best solution for our customers.
Ownership- As owners, we take the initiative to solve internal and external problems while supporting peer success and holding ourselves accountable for delivering the best work. We do this from a place of high trust.
Do the Right Thing!- Comfort and safety come from knowing that everyone will do the right thing, even when nobody's looking.
For further information please submit an application and a member of the Graylog People Team will be in touch.