Developer Jobs in Hauppauge, NY

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Software Developer - SQL / C# / .NET

Seal Dynamics - A HEICO Company Hauppauge, NY

Hauppauge, NY

Today

$65k - $75k/yr Full time Backend Developer .NET AI

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Job Description

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

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