Senior Software Engineer

NAPCO Security Technologies; Village of Amityville (NY); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

401(k)

Paid vacation

Personal time off

Paid holidays

Long-term disability insurance

Tuition reimbursement

Medical insurance

Dental insurance

Life insurance

Growth potential

Job summary

NAPCO Security Technologies, Inc., headquartered in Amityville, NY, seeks a Senior Software Engineer with deep experience in desktop apps, backend systems, cloud infrastructure, multithreaded services, and hardware communication. You will design and build high‑performance software capable of thousands of concurrent client connections in production environments.

Responsibilities include creating C#.NET desktop applications, ASP.NET web apps, scalable Windows services, TCP/UDP communication,

Qualifications

• Bachelors degree in CS or related field.
• 6+ years of hands-on software development experience.
• Experience with multithreaded backend Windows services.
• Knowledge of TCP/IP, UDP, and client/server architectures.
• Experience with AI-assisted coding tools and automation workflows.

Responsibilities

• Design, develop, and maintain enterprise desktop apps using C#.NET.
• Build web apps with ASP.NET and frontend technologies.
• Create scalable multithreaded Windows Services for thousands of connections.
• Develop TCP/IP/UDP client/server apps for high-volume systems.
• Implement secure hardware communication using AES and TLS.
• Design and optimize SQL Server databases and queries.

Skills

C#.NET

Desktop applications

ASP.NET

Multithreading

Education

Bachelor's degree in Computer Science or related field

Tools

TFS

GitHub

Azure

Job description

Position: Senior Software Engineer- Full Stack/Backend/Cloud

Company: NAPCO Security Technologies, Inc.

The Company:

NAPCO Security Technologies, Inc., headquartered in Amityville, Long Island NY, is a world-wide leader in the manufacturing of electronic security systems for over 50 years has an opening for a Senior Software Engineer. We are seeking a highly skilled and motivated Senior Software Engineer with strong experience in desktop applications, backend systems, cloud infrastructure, multithreaded services, and hardware communication technologies. The ideal candidate will have deep expertise in Microsoft technologies, networking, scalable server applications, and modern AI-assisted development tools. This role requires hands‑on experience designing and developing high-performance applications capable of supporting thousands of concurrent client connections in production environments

Responsibilities:

• Design, develop, and maintain enterprise-level desktop applications using C#.NET Windows/Desktop technologies.
• Develop and maintain web applications using ASP.NET and related frontend technologies.
• Build scalable multithreaded Windows Services capable of handling thousands of simultaneous client connections.
• Develop TCP/IP and UDP client/server applications for high-volume communication systems
• Implement secure hardware communication protocols utilizing AES and TLS encryption technologies.
• Design and optimize Microsoft SQL Server databases, schemas, complex queries, and server performance.
• Develop AI-assisted solutions and custom AI agents for automation, reporting, monitoring, and performance tuning.
• Manage and maintain cloud-hosted Windows services and web applications.
• Integrate third-party cloud services using RESTful APIs and OpenAPI standards.
• Collaborate with cross-functional teams to deliver scalable and secure software solutions.
• Maintain source control and development workflows using Team Foundation Server (TFS) and GitHub.

Qualifications:

• Bachelor’s degree in computer science, Electrical Engineering, Electronics Engineering, or a related field.
• Minimum 6+ years of hands‑on software development experience.
• Experience developing multithreaded backend Windows Services.
• Strong networking knowledge including TCP/IP, UDP, and Client/server architecture.
• Experience building applications supporting thousands of concurrent connections.
• Experience with AI-assisted coding tools and automation workflows.
• Experience in creating AI agents for operational and periodic tasks.
• Strong experience with Team Foundation Server (TFS) and GitHub.
• Ability to quickly troubleshoot and resolve production issues in cloud environments.
• Familiarity with Linux environments.
• Experience managing cloud infrastructure and deployments.
• Knowledge of cloud monitoring, scalability, and performance tuning.

Compensation and Benefits:

We offer an attractive employment package including a competitive salary, 401(k), paid vacation, personal time off, paid holidays, long term disability insurance, tuition reimbursement, medical insurance, dental insurance, life insurance, and excellent growth potential.