Software Developer - SQL / C# / .NET

Seal Dynamics, a HEICO company, is hiring an entry-level Software Developer to help build and connect the systems that run day-to-day business operations. This on-site role in Hauppauge, NY (Long Island) focuses on SQL (T-SQL), C#/.NET services, and REST API integrations, with ongoing work that brings AI capabilities closer to real business data.

You will collaborate with both technical and non-technical teams to understand what they need before implementation, then deliver improvements across databases, internal web applications, and containerized development and deployment workflows.

What you’ll do

• Write, test, and tune T-SQL queries, views, and stored procedures against ERP and line-of-business databases
• Build and maintain C#/.NET applications and services
• Build and consume REST APIs to integrate core business systems with each other and with outside partners
• Contribute to AI integration efforts by connecting LLM APIs and MCP (Model Context Protocol) servers to business data so users can ask questions of real systems
• Write Python for data work, automation, and AI-adjacent tooling
• Support and enhance internal web applications
• Work in containerized development and deployment environments
• Partner with people in purchasing, warehouse, sales, and finance to understand requirements directly
• Follow source control, code review, and change management practices, including helping improve them

Required qualifications

• Associate’s or Bachelor’s degree in Computer Science, Information Systems, Engineering, or a related field, or equivalent practical experience (bootcamp, military, self-taught with a portfolio)
• Working knowledge of SQL, including writing a multi-table join, understanding what an index does, and knowing why SELECT * in production code is a bad habit
• Familiarity with at least one object-oriented language, with C# preferred (Java, Python, or VB.NET experience also applies)
• Basic understanding of how REST APIs work: requests, responses, JSON, status codes, and authentication
• Basic familiarity with source control (Git/GitHub)
• Clear written and verbal communication to ask the right questions with non-technical stakeholders
• Curiosity and initiative: research before escalating and flag problems early

Helpful but not required

• Python beyond the basics, especially for data or automation work
• Hands-on work with LLM APIs, MCP, RAG, or embeddings, including personal projects
• Experience using AI coding assistants on real code, plus the judgment to review output
• Docker or other containerization experience
• Power BI, DAX, or other BI and reporting tools
• React or another modern front-end framework
• ERP development experience (Infor SyteLine / CloudSuite Industrial a plus)
• EDI or other B2B partner integration experience
• Exposure to distribution, manufacturing, inventory, or warehouse systems
• Aviation or other regulated-industry experience

Technologies you may work with

• SQL, T-SQL, SQL Server Reporting Services, ERP (Infor SyteLine, CloudSuite Industrial), eCommerce, warehouse management, document management
• C#, .NET, VB.NET, Visual Studio, HTML, CSS, JavaScript, React
• REST, JSON, webhooks, Git, GitHub
• LLM APIs, MCP (Model Context Protocol), Power BI, DAX
• Python, Docker
• EDI, CloudSuite Industrial integrations and related B2B connectivity

Compensation and workplace details

• Salary: USD 65,000 - 75,000 per year
• Work location: In person
• On-site requirement: Applicants must be located in Hauppauge, Long Island and available on-site
• Not remote or hybrid
• Not a contract role
• Visa sponsorship: not available

Benefits

• Health, dental, and vision coverage
• Paid vacation, company holidays, floating and personal days
• Family and medical leave
• 401(k) plan and 401(k) matching
• Life insurance
• Short- and long-term disability
• A collaborative, low-bureaucracy team environment
• Employee assistance program
• Health savings account
• Paid time off
• Parental leave
• Professional development assistance
• Referral program