The OpenNMS Group is seeking a skilled and passionate Senior Software Engineer to join our growing team focused on building and growing our open-source Network Monitoring Solution in use by numerous Fortune 500 companies. This position offers the flexibility to work remotely in either the United States or Belfast, Northern Ireland, dependent on work authorization. Responsibilities include, but are not limited to: Help architect, design, and develop scalable features to meet product deliverables. Collaborate with other developers, architects, QA, devops and product management teams. Write well-designed, testable code including unit tests and basic documentation. Integrate software components into a fully functional software system. Be a part of discussions about code design, architecture, and refactoring to balance technical debt against delivering functionality. Review code and mentor other engineers. Work with little or no supervision. Apply software engineering best practices across the development lifecycle, including agile methodologies, coding standards, code reviews, source management, build processes, testing, and operations Education & Experience Qualifications: Bachelor’s degree (preferably in Computer Science or a related field), although commensurate experience will be considered in lieu of degree Advanced level experience in Java (6 years) Knowledge, Skills, and Abilities: Must have a “can do” attitude and a hacker mindset to make things work in a complex product environment Experience having designed, implemented, and delivered, highly performant and scalable, software to a large customer base successfully. Solid knowledge of SQL and NoSQL data stores and efficient data schemas Understanding of message systems such as Kafka, ActiveMQ Solid understanding of IP networking principles and network/application security Experience working in Agile environment. General DevOps knowledge: CI/CD, automation, build, deployment Working knowledge with Linux/UNIX and familiarity with shell scripting "Bonus Points" if you have the following skills: OSGi and/or Karaf Monitoring Systems Time Series DB The salary range for applicable US-based applicants to this position is below. The specific rate will depend on the successful candidate’s qualifications, prior experience as well as geographic location. $100,800 - $145,000 base salary plus bonus potential.