76 application developer jobs at 51 companies in Mastic Beach, NY
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Application Developer – Internal Platform
Glen Cove, New York, United States
$125k-$150k/yr HybridFull Time
4+ YOERequires 4+ years building production web applications, strong C#/.NET and SQL Server experience, MVC knowledge, JavaScript framework familiarity, API design, and third-party platform integration experience.
C#, .NET, SQL Server, MVC, React, Vue, Alpine, Angular, Shopify, Galley, ShipStation, ASP.NET Web Forms, ASP.NET MVC, Razor, Microsoft Entra ID, ERP
1mo
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ArcGIS Enterprise Developer – Application Developer Levels 1–5
Jamaica, New York, United States
$57k-$124k/yr OnsiteFull Time
1+ YOEDesign, code, test, and document web/mobile/client-server applications; levels require 1–12+ years software development experience and a bachelor’s degree or equivalent experience.
ArcGIS Enterprise, Windows, Linux
1mo
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Java Web Application Developer
Greenwich, Connecticut, United States
HybridFull Time
3+ YOEMaster's in CS or related, 3+ years web application development, knowledge of Oracle/PL/SQL and Java, experience with Spring (Boot/MVC), SPA frameworks (Angular/Vue.js), HTML5/CSS3/TypeScript, Bitbucket/Gerrit, Gradle, UNIX/Linux; familiarity with AI-assisted coding tools.
Oracle, PL/SQL, Java, Spring Framework, Spring Boot, Spring MVC, Angular, Vue.js, HTML5, CSS3, TypeScript, Bitbucket, Gerrit, Gradle, Claude Code, UNIX, Linux
2d
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Application Engineer I- Training
Northford, Connecticut, United States
$77k-$96k/yr HybridFull Time
Requires a technical bachelor's degree, interest or experience in application engineering or technical training, Building Automation product knowledge, training delivery skills, and strong organizational and problem-solving abilities.
Honeywell Building Automation, mobile technology, live streaming, Honeywell Forge
1mo
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EWM SAP IT Application Engineer
Wilton or Eindhoven or Netherlands or Europe or Asia or North America
HybridFull Time
8+ YOEBachelor's degree required, 8+ years in application development or enterprise systems, deep SAP/EWM/S4HANA experience, technical leadership, change management, US work authorization without sponsorship, clean-room work possible.
Agile Release Trains, SAP/ERP, EWM, SAP S/4HANA
1w
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Senior Application Security Engineer
Independence or Cleveland or Kansas City or Phoenix or Tampa or Nashville or New Haven or Hartford
HybridFull Time
8+ YOECollege degree, 8+ years related experience, expert technical knowledge in application and AI security, ability to lead teams, travel and on-call availability, strong verbal and written communication.
STRIDE, PASTA, MITRE ATLAS, OWASP Top 10, CWE Top 25, SANS 25, Semgrep, CodeQL, SonarQube, Checkmarx, Veracode, Burp Suite, OWASP ZAP, Snyk, Black Duck, GitHub Actions, GitLab CI, Azure DevOps, Jenkins, Microsoft Azure, AWS, Kubernetes, CNAPP, REST, GraphQL, OAuth 2.0, OIDC, SAML, CVSS, NIST AI RMF, EU AI Act, ISO/IEC 42001, MITRE ATT&CK, SBOM, Python, Java, C#/.NET, JavaScript/TypeScript, Go
1mo
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Application Support Engineer
Greenwich, Connecticut, United States
$110k-$140k/yr OnsiteFull Time
2+ YOEBachelor's degree preferred, 2+ years supporting complex software systems in finance, hands-on SQL and Python skills, debugging and log analysis, strong written/verbal communication, on-call production support experience.
SQL, Python
3d
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Senior Application Architect
Burlington or Greenwich or United States
$120k-$334k/yr HybridFull Time
8+ YOEBachelor's degree or equivalent experience and 8+ years in software, application, or product development with significant architecture responsibilities; requires enterprise architecture and cross-functional leadership expertise.
project management practices
3d
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Senior Application Architect
Greenwich or Burlington
$120k-$334k/yr HybridFull Time
8+ YOEBachelor's degree or equivalent experience; 8+ years in software, application, or product development with architecture responsibilities; enterprise architecture, systems design, integration, leadership, consulting, and communication expertise.
cloud-based, distributed enterprise environments
4d
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Polymer Additives Sr. Application Scientist
Stamford, Connecticut, United States
$112k-$140k/yr OnsiteContract
10+ YOEPhD/MSc (or equivalent) in polymer science/chemistry/materials,10+ years in polymer additives application development, expertise in polyolefin stabilization, formulation development, testing, and strong communication skills.
MFR/MFI, DSC/OIT, TGA
3w
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Field Application Engineer - Enterprise Server Accounts
United States or Poughkeepsie or Yorktown Heights or Lisle or Bridgeport or Raleigh or Austin
$100k-$140k/yr RemoteFull Time
BS in engineering required; experience in electronics/interconnect industry; customer-facing technical experience; ability to manage multiple priorities and travel up to 30%; must be authorized to work in the U.S.
NX
1mo
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Sr. Engineer, Applications
Deer Park or Southfield or Hudson or Conover
$85k-$115k/yr HybridFull Time
5+ YOEBachelor's in engineering required, 5+ years applications or manufacturing experience, strong mechanical aptitude, ability to analyze customer requirements, manage projects, travel up to 30%, proficient with Microsoft Office and engineering software, U.S. work authorization required.
Microsoft Office
3d
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Senior AI Engineer
Greenwich, Connecticut, United States
OnsiteFull Time
Bachelor's degree or equivalent experience; enterprise technology and generative AI experience; Python, LLMs, orchestration frameworks, GCP, API integration, SDLC, Agile, and secure scalable application development.
Large Language Models (LLMs), ADK, LangChain, Google Cloud Platform, Vertex AI, Cloud Run, BigQuery, Python, Retrieval-Augmented Generation (RAG)
3w
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.NET Developer
Deer Park, New York, United States
$115k-$120k/yr RemoteFull Time
4+ YOE4+ years building C#/.NET applications, SQL Server, web framework experience (Blazor/ASP.NET/React), Git/SVN, RabbitMQ preferred, production support experience, AI tool (Claude) usage, clear written communication.
C#, .NET, SQL Server, Blazor, ASP.NET, React, Git, SVN, RabbitMQ, Jira, PagerDuty, Claude
3mo
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AI Software Developer
Westport, Connecticut, United States
$25-$75/hr OnsiteContract
Experience building complex, data-sensitive apps and programs using AI; able to build applications and IT infrastructure.
1w
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Backend Software Engineer - Assistant Vice President
Greenwich or New York City
$130k-$170k/yr HybridFull Time
6+ YOEDegree in software engineering,6+ years web application development,experience with Python/Scala/Node.js,knowledge of relational/NoSQL modeling,testing and SSO familiarity.
Scala, Ruby, Node.js, Python, FastAPI, ZIO, Scala Test, ZIO Test, PyTest
3d
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Senior AI Engineer
Greenwich, Connecticut, United States
OnsiteFull Time
Bachelor's degree or equivalent experience; enterprise technology integration, LLMs, generative AI, Python, GCP, APIs, SDLC, Agile, and secure production AI application experience required.
Large Language Models (LLMs), ADK, LangChain, Google Cloud Platform (GCP), Python, Vertex AI, Cloud Run, BigQuery, Retrieval-Augmented Generation (RAG), HRIS, CRM, ERP, APIs, SDLC, Agile
3w
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Webmaster & Applications developer (80350)
New Rochelle, New York, United States
OnsiteFull Time
Administer and develop Drupal/Pantheon sites, build and integrate web applications/APIs, maintain web infrastructure (IIS/Apache/Tomcat/ColdFusion/SQL Server), and ensure accessibility and security.
Drupal, Pantheon, Technolutions Slate, CollegeNET 25Live, IIS, Apache, Tomcat, ColdFusion, SQL Server, PeopleSoft, ASP.NET, JavaScript, HTML, CSS, SQL, XML, JSON, Microsoft services
2mo
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Generative AI Lead Engineer
Dallas or Stamford or Chicago
$120k-$140k/yr HybridFull Time
5+ YOEStrong experience in Generative AI, LLMs, prompt engineering; hands-on with .NET, React, Python; experience with RAG architectures, API integrations; Azure cloud; ability to deploy AI-enabled applications.
.NET, React, Python, LangChain, LlamaIndex, Claude, Azure, RAG
3w
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Senior Full-Stack & Platform Engineer (Remote)
Bethpage, New York, United States
$155k-$175k/yr RemoteFull Time
7+ YOE7+ years building and owning production web applications; extensive PostgreSQL experience; strong AWS EC2, Linux, Node.js, TypeScript, Python, API integration, and observability/production ops skills.
PostgreSQL, Supabase, AWS EC2, Linux, Node.js, TypeScript, Python, OpenClaw, Everflow, TrustedForm, IPQS, Google APIs, JavaScript, CI/CD
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