Internal Developer Tools Software Engineer Jobs in Portsmouth, NH

Location: Dover, NH

Job Type: Full-Time / Permanent

Q LLC is a pioneering firearms design and technology company that continually pushes the boundaries of innovation in the industry. Our commitment to excellence has positioned us as a leader in creating cutting‑edge solutions for firearm enthusiasts. As we expand our team, we are seeking a dynamic and skilled Software Engineer who shares our dedication to advancing technology and design. As a Software Engineer at Q LLC, you will play a crucial role in maintaining and enhancing our Enterprise Resource Planning (ERP) system, collaborating with our development team and internal stakeholders to ensure the system meets evolving business needs.

This position is based in Dover, NH, and requires you to be on‑site five days per week.

Minimal travel may be required as needed for project collaboration.

• Maintain, optimize, and enhance the existing ERP system built on WinForms and .NET Framework/.NET Core, including web services.
• Collaborate closely with internal staff, ensuring clear communication and alignment on project tasks, new features, and timelines.
• Work with product owners, business analysts, and internal stakeholders to translate business requirements into technical solutions.
• Troubleshoot, debug, and resolve issues within the ERP system, ensuring system reliability and performance.
• Design and implement new features and modules to address evolving business requirements, ensuring system stability and backward compatibility.
• Conduct code reviews, write unit tests, and document changes to ensure high-quality, maintainable code.
• Optimize application performance, including database interactions and UI responsiveness, to enhance the user experience.
• Implement security best practices and ensure data protection protocols within the ERP system.
• Stay current with advancements in .NET, WinForms, and ERP technologies, recommending improvements and modernization efforts.

• 1-3 years of experience in .NET development, with a focus on WinForms applications and web services.
• Proven track record of maintaining and enhancing large‑scale ERP systems.
• Strong proficiency in .NET Framework, .NET Core, C#, and WinForms development.
• Experience with Entity Framework or other ORM technologies.
• Solid knowledge of relational databases such as SQL Server or MySQL, with the ability to write complex queries and optimize database performance.
• Experience collaborating with offsite/remote teams, with excellent communication skills to ensure smooth project execution.
• Strong problem‑solving skills and the ability to troubleshoot issues in a production environment.
• Familiarity with version control systems (e.g., Git) and CI/CD pipelines.
• Knowledge of security best practices in software development, particularly in ERP systems.
• Experience with tools such as Syncfusion (or similar) is a plus.
• Ability and desire to work in a manufacturing environment.

• Experience with integrations to systems such as Adobe Commerce/Magento, QuickBooks, and ShipStation.
• Exposure to AI or automated coding assistance tools.
• Firearms industry experience.

• Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent work experience).

This position may require extended periods of time at a desk, working with computers and related technical equipment. Occasional lifting of lightweight hardware may be required during maintenance or setup tasks.

Q LLC is an Equal Opportunity Employer. We are committed to creating an inclusive environment for all employees and applicants, regardless of race, religion, gender, sexual orientation, age, disability, or veteran status.

It is impossible to list every requirement or responsibility of this position. Job responsibilities and the Company's needs may change over time, and the above description is not comprehensive or exhaustive. Q LLC reserves the right to adjust, add to, or eliminate any aspect of this description as necessary to meet business needs.

The Company reserves the right to conduct background investigations and/or reference checks on all of its potential employees as well as a drug screening.