37 api developer integration engineer jobs at 31 companies in Danbury, CT
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Staff Software Engineer - SaaS integrations,API Designs - Travel & Lifestyle Services
Phoenix or New York City
$144k-$256k/yr OnsiteFull Time
10+ YOE10+ years building and operating large-scale distributed systems, ownership of third-party/SaaS integrations, API design, resilience, data quality, security, and cross-team influence.
AWS
1mo
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Senior Full-Stack Software Developer – Finance & ERP Integration
Mahwah, New Jersey, United States
$135k-$160k/yr OnsiteFull Time
7+ YOE7+ years full-stack development with finance/ERP experience; strong ASP.NET/.NET Core, C#, SQL, Entity Framework, Angular, NGRX, SignalR, RESTful APIs, and Git; experience integrating with QuickBooks/NetSuite/SAP and understanding financial workflows.
SAYDAR, ASP.NET, .NET Core, C#, SQL, Entity Framework, QuickBooks, NetSuite, SAP, Angular, NGRX, SignalR, RESTful APIs, Git, Microsoft Dynamics
1mo
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Middle Office Software Developer
Norwalk or Rowayton
$115k-$200k/yr OnsiteFull Time
5+ YOEBachelor's in computer science, 5+ years software development in financial services, experience with C#, Windows and web frameworks, SQL Server, messaging/SOA/APIs, Agile and unit/integration testing.
C#, Windows Forms, WPF, ASP.NET MVC, Angular, JavaScript, Web API, SQL Server, MOM, SOA, APIs, Agile, Coding agents and AI-assisted development tools
3w
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Software Engineer I
Grand Rapids or Uniondale or Austin or Atlanta
$100k-$150k/yr HybridFull Time
1+ YOE1+ year software engineering experience; strong skills in Python or JavaScript/TypeScript; familiarity with APIs, integrations, automated testing, debugging; comfortable with AI-assisted development (Claude Code preferred); onsite collaboration required.
Python, JavaScript, TypeScript, Claude Code
1w
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Senior Frontend Developer
Greenwich, Connecticut, United States
HybridFull Time
5+ YOE5+ years commercial SPA development experience; degree in CS or related; strong JavaScript/HTML/CSS skills; experience with Vue/React/Angular, TypeScript, webpack/Vite, API integration, and AI/agentic development tools.
Vue 3, TypeScript, VueJs, Vuex, Pinia, Vite, Cypress, webpack, React.js, Angular.js, Claude Code, JavaScript, HTML, CSS, LESS
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
2mo
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ERP Data Engineer (White Plains, US)
White Plains, New York, United States
$102k-$128k/yr OnsiteFull Time
2+ YOE2+ years data engineering; SAP SAC integration; data pipelines; cloud; scripting; API/microservices.
SAP SAC, SAP Datasphere, BDC, BTP, APIs, Microservices, SQL, Athena, DevOps, Cloud, Data integration, ETL/ELT, CI/CD, GenAI
3mo
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SAP BTP (CPI/IS) Developer
Waltham or Brooklyn or Hicksville or Syracuse or Connecticut or New Jersey or New Hampshire or Pennsylvania or Rhode Island or Vermont or Maine
$111k-$158k/yr HybridFull Time
Experience developing SAP BTP/Integration Suite solutions (CPI/IS), strong scripting (Java, Groovy), XML/JSON/OData/SOAP/REST, API security, Git/Jira familiarity; bachelor's in CS/engineering preferred.
SAP BTP Integration Suite, CPI, PIPO, ALE/IDocs, BAPIs, XML, OData, SOAP, REST, Java, Groovy, JSON, Business Application Studio (BAS), SAP HANA Cloud, Git, Jira, SAP ABAP, Eclipse, CDS Views, Fiori, UI5, HTML5, Net weaver web services
1d
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Staff Software Development Engineer
Hartford, Connecticut, United States
$130k-$261k/yr HybridFull Time
8+ YOERequires 8+ years as a technical lead in middleware integration or large-scale federated systems, architecture experience, API integration expertise, and a bachelor's degree or equivalent experience.
Kong API Gateway, Apigee, IBM API Connect (APIC), Azure APIM, REST, Java, J2EE, Kafka
1mo
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Associate Salesforce Developer
New York, New York, United States
$85k-$100k/yr HybridFull Time
Foundational knowledge of Apex, SOQL/SOSL, Visualforce, LWC, Salesforce data modeling and admin concepts; familiarity with Git/SFDX and integrations (REST APIs, MuleSoft); commitment to data security and strong analytical skills.
Apex, SOQL, SOSL, Visualforce, Lightning Web Components (LWC), Salesforce Flows, Custom Metadata, Custom Settings, Experience Cloud, MuleSoft, NPSP, PMM, Traction Rec, Accounting Seed, Conga, CloudBudget, Service Echo, Git, GitHub, SFDX, scratch org, Data Loader, Data Import Wizard, Workbench, Microsoft Excel, VS Code, REST APIs, platform events
1mo
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Sr. Software Engineer (React Native)
Shelton, Connecticut, United States
$119k-$149k/yr OnsiteFull Time
6+ YOE6+ years software engineering experience; strong JavaScript, Node.js, ReactJS and React Native skills; experience with REST APIs, unit/integration testing, CI/CD, version control, databases; BS in CS or equivalent preferred.
JavaScript, Node.js, ReactJS, React Native, REST APIs, CI/CD
1mo
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Senior Software Engineer - Platform and Infrastructure
Glendale or Seattle or Bristol
$142k-$190k/yr HybridFull Time
5+ YOEBachelor's degree in computer science or related field, 5+ years technical experience, hands-on ML methods, production software development, API integration, defensive design/cybersecurity, and strong technical communication.
AWS, Kinesis, Dynamo, ElastiCache, Lambda, S3, ECS, Aurora, Bedrock, JavaScript, TypeScript, Swift, Kotlin, Terraform, CloudFormation, CloudWatch, Datadog
4d
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Software Engineer II - Enterprise AI Products
Hartford or St. Paul
$120k-$199k/yr HybridFull Time
4+ YOEBachelor's in CS/STEM or equivalent, plus 4 years software engineering; proficiency in Python; experience with cloud (AWS/Azure), Kubernetes, CI/CD, REST APIs, and enterprise AI integrations.
Python, JavaScript, TypeScript, Java, AWS, Azure, Kubernetes, RESTful APIs, Jenkins, GitHub Actions, Terraform, MongoDB, Temporal, Git
1w
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Sr. Engineer, Salesforce
Stamford, Connecticut, United States
$95k-$125k/yr RemoteFull Time
5+ YOEBachelor's in IT/CS/Engineering,5+ years Salesforce experience,experience with Data Cloud/Sales/Service/Marketing Clouds,Flow,Apex,LWC,APIs,integration and Agile experience;ability to travel;US residency required.
Flows, Apex, Lightning Web Components, Data Cloud, Sales Cloud, Service Cloud, Marketing Cloud, APIs, Agile/Scrum
4d
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Guidewire Developer, Senior Associate
Chicago or Stamford or Atlanta or Charlotte or Austin or Washington or Columbus or Dallas or Los Angeles or Milwaukee or Denver or Boston or New York or Florham Park or San Francisco or Silicon Valley or Philadelphia or Phoenix or Pittsburgh or Hartford
$77k-$202k/yr OnsiteFull Time
2+ YOEBachelor's degree, minimum 2 years experience, Guidewire platform knowledge, Object Oriented Programming, API integration experience, certifications (Guidewire,Scrum Master) preferred, up to 60% travel.
Guidewire PolicyCenter, Guidewire BillingCenter, Guidewire ClaimCenter, GOSU, PCF, Guidewire Integration Framework, Spring Boot, Rest Client API, SOAP APIs
3d
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Software Engineer II - Enterprise AI Products
Hartford or Saint Paul
$120k-$199k/yr OnsiteFull Time
4+ YOEBachelor's in CS or related STEM and 4+ years software engineering; proficiency in Python, cloud (AWS/Azure), Kubernetes, CI/CD, REST APIs, LLM/AI integrations; strong communication and problem solving.
Python, JavaScript, TypeScript, Java, AWS, Azure, Kubernetes, RESTful APIs, Jenkins, GitHub Actions, Terraform, MongoDB, Temporal, MCP, LLM, Git, RAG
2d
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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
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
2w
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Sales Engineer – AI & Agentic Sales Systems
Goshen, New York, United States
HybridFull Time
5+ YOE5+ years building enterprise software/AI solutions; experience designing agentic AI systems, CRM automation (HubSpot/Salesforce), API integrations, cloud (AWS) and analytics; BS in CS/Engineering/Data/AI preferred.
OpenAI, Anthropic Claude, Google Gemini, HubSpot CRM, Salesforce, Microsoft Dynamics, Zoho CRM, AWS, Serverless, API Gateway, Python, JavaScript, TypeScript, SQL, REST APIs, Git, CI/CD, Retrieval-Augmented Generation (RAG), vector databases, semantic search
1w
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Founding Software Engineer - AI & Operations (Full-Stack)
Wallingford, Connecticut, United States
OnsiteFull Time
3+ YOE3+ years engineering experience with ownership of a production system; strong full‑stack fundamentals, SQL, LLM API production integrations, OCR/document extraction, and self-directed problem solving.
OpenAI, Anthropic, OCR, MaintainX, Claude Code, Copilot, SQL
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