97 api developer jobs at 47 companies in Delaware

PromotedHiringCafe
Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
3w
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Junior Application Developer
Philadelphia or Pennsylvania or New Jersey or Delaware
$68k-$76k/yr RemoteFull Time
The Wistar Institute
The Wistar Institute: Independent biomedical research institute focusing on oncology and vaccines.
1+ YOEBachelor's in Computer Science (or equivalent experience), 1–3 years relevant web application development experience, proficiency with JavaScript/TypeScript, SQL/MSSQL, Node.js/Express, Vue.js or React, REST APIs, CI/CD and version control.
JavaScript, TypeScript, MSSQL, Node.js, Express, Vue.js, React, SQL, REST API, CI/CD
1mo
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Sr. Manager, Software Engineering - API
Florida or Texas or Illinois or New York or New Jersey or Alabama or Arizona or Arkansas or Colorado or Connecticut or Delaware or Georgia or Indiana or Kansas or Massachusetts or Missouri or North Carolina or Tennessee or Utah or Wisconsin
$174k-$189k/yr RemoteFull Time
TradeStation
TradeStation: Provider of online brokerage services and trading technology.
7+ YOE7+ MgmtLead API platform strategy, manage teams, design API governance, and drive cloud-native infrastructure—REST/GraphQL/gRPC with AWS/Kubernetes.
REST, GraphQL, gRPC, MCP, Kong, Apigee, AWS API Gateway, AWS, Kubernetes, OpenAPI/Swagger, Protocol Buffers, OAuth 2.0, JWT, mTLS, Istio, Linkerd, Terraform, CI/CD
1d
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Senior Mobile Developer
Utah or Wisconsin or Alaska or Arkansas or Washington or Arizona or Virginia or Alabama or Texas or Pennsylvania or Oregon or Oklahoma or Ohio or Nevada or Nebraska or Montana or Mississippi or Minnesota or Michigan or Massachusetts or Maryland or Maine or Louisiana or Kansas or Iowa or Indiana or Idaho or Florida or Delaware or Connecticut or Missouri or Colorado or California or Wyoming
$125k-$135k/yr RemoteFull Time
Harris Computer
Harris Computer: Provides mission-critical vertical market software and service solutions.
8+ YOEExpertise in Kotlin and Swift, modern mobile UI frameworks, mobile architectures and DI, REST API integration, mobile testing, CI/CD tooling, AI-assisted development experience, bachelor's or equivalent, 8+ years software development.
Kotlin, Swift, Jetpack Compose, SwiftUI, The Composable Architecture, MVVM, Koin, Retrofit, OkHttp, URLSession, JUnit, Mockito, Robolectric, Espresso, Compose UI test, XCTest, XCUITest, Gradle, Swift Package Manager, Bitrise, Fastlane, GitHub Copilot, Claude, Cursor, ChatGPT
1mo
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Senior Java Developer - Vice President
New Castle, Delaware, United States
HybridFull Time
Citi
CitiNYSE: C: Providing global banking, investment, and wealth management services.
6+ YOEProficiency in Java, API, Cloud engineering; RESTful APIs with Spring; Oracle/SQL/NoSQL; OpenShift/Kubernetes; CI/CD; SDLC/Agile; DevOps; able to work in fast-paced environment.
Java, API, Spring, Oracle, SQL, MongoDB, OpenShift, Kubernetes, MQ, Kafka, CI/CD, SDLC, Agile
1mo
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Senior Java Developer - Vice President
New Castle or Irving
$126k-$189k/yr HybridFull Time
Citi
CitiNYSE: C: Global diversified financial services holding.
6+ YOEProficiency in Java, RESTful APIs (Spring), Oracle/SQL/MongoDB, OpenShift/Kubernetes, MQ/Kafka, cloud engineering, DevOps/CI/CD, SDLC/Agile; strong systems analysis; 6+ years preferred; Bachelor’s required, Master’s preferred.
Java, API, Spring, Oracle, SQL, NoSql, MongoDB, OpenShift, Kubernetes, MQ, Kafka, SDLC, Agile, DevOps, CI/CD, GenAI, LLMs
3mo
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Lead Security Engineer — Blockchain
Plano or Seattle or Columbus or Wilmington
$152k-$215k/yr OnsiteFull Time
JPMorgan Chase
JPMorgan ChaseNYSE: JPM: Global financial services firm providing banking and investment solutions.
7+ YOE7+ years software development, with 2+ years blockchain; strong Java/Python; AWS and Kubernetes; cryptography knowledge; policy engines; REST APIs; observability tools.
Java, Python, Spring Boot, Flask, FastAPI, AWS, EKS, Terraform, Docker, Kubernetes, OAuth 2.0, JWT, TLS/mTLS, Datadog, Dynatrace, Splunk, Grafana, Prometheus, Jenkins, GitHub Actions, Spinnaker, Oracle, PostgreSQL, DynamoDB, MongoDB, Redis
1mo
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Software Engineer, AI
United States or Alabama or Alaska or Arkansas or Arizona or California or Colorado or Connecticut or Delaware or Florida or Georgia or Hawaii or Iowa or Idaho or Illinois or Indiana or Kansas or Kentucky or Louisiana or Maine or Michigan or Minnesota or Missouri or Mississippi or Montana or North Carolina or North Dakota or Nebraska or New Hampshire or New Jersey or New Mexico or Nevada or Ohio or Oklahoma or Pennsylvania or Rhode Island or South Carolina or South Dakota or Tennessee or Texas or Utah or Virginia or Washington or Wisconsin or West Virginia or Wyoming
$125k-$145k/yr RemoteFull Time
Patch My PC
Patch My PC: Automates third-party application patching for Microsoft IT management tools
5+ YOEBachelor's (or equivalent) and 5+ years professional software development with C#/.NET; experience with AI agent frameworks, LLMs, Transformers/OpenAI/Hugging Face, REST APIs, cloud (Azure/AWS/GCP), MongoDB, and Git.
C#, .NET, LangChain, CrewAI, AutoGPT, MetaGPT, GPT, Claude, Mistral, Transformers, OpenAI API, Hugging Face, REST APIs, Azure, AWS, GCP, MongoDB, Git, Docker, CI/CD, Azure AI Foundry, Microsoft ConfigMgr, Microsoft Intune, Microsoft WSUS
2mo
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Workday Integrations Developer
Milwaukee or Charlotte or Alabama or Alaska or Arkansas or Arizona or Delaware or Florida or Georgia or Iowa or Idaho or Illinois or Indiana or Louisiana or Kansas or Kentucky or Maine or Michigan or Missouri or Mississippi or Montana or North Carolina or North Dakota or Nebraska or New Hampshire or New Mexico or Nevada or Ohio or Oklahoma or Pennsylvania or South Carolina or South Dakota or Tennessee or Texas or Utah or Virginia or Wisconsin or West Virginia or Wyoming
$38-$56/hr RemoteFull Time
Advocate Health
Advocate Health: Provides integrated clinical care through a network of hospitals.
3+ YOEBachelor's in Computer Science or related; typically 3 years Workday integration development experience; expertise with Workday Studio, EIB/Core Connectors, Extend, BIRT, REST/SOAP APIs, XSLT/XML/JSON; Jira/ServiceNow and Microsoft Office experience; rotational on-call support.
Workday Studio, EIB (Enterprise Interface Builder), Connector, Core Connectors, Workday Integration Cloud, Extend, Workday Extend, Orchestrate, Workday BIRT, Workday REST/SOAP APIs, XSLT, XML, JSON, Java, Python, Jira, ServiceNow, Microsoft SharePoint, Microsoft Teams, Microsoft OneNote, Microsoft Excel, Microsoft Word, Microsoft Outlook
1mo
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AI Solutions - Agent Engineer
United States or Delaware or Florida or Iowa or Illinois or Indiana or Kentucky or Maryland or Michigan or Minnesota or Missouri or Maine or Nebraska or North Dakota or New Jersey or Pennsylvania or Rhode Island or South Dakota or Texas or Wisconsin
$110k-$176k/yr RemoteFull Time
Marco Technologies
Marco Technologies: Provides managed IT, cloud, and business printing services.
3+ YOEBachelor's degree; 3+ years software/solution engineering experience; hands-on with LLMs, agent systems, Python, APIs/SDKs; cloud and production deployment experience; strong communication and problem-solving.
Python, APIs, SDKs, LLMs
1mo
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Lead Software Engineer - C# / .Net
Wilmington, Delaware, United States
$128k-$214k/yr HybridFull Time
M&T Bank
M&T BankNYSE: MTB: Provides retail, commercial, and wealth management banking services.
5+ YOE5+ years systems analysis/application development (or 7+ with associate). Expert C#/.NET experience, RESTful API and service architecture, DevOps/CI/CD familiarity, exposure to Angular, strong analytical and communication skills.
C#, .NET, RESTful APIs, Angular, CI/CD, DevOps, SDLC, Loan IQ, Finastra
4w
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Full-Stack Engineer (Backend Focused)
Los Angeles or Alabama or Alaska or Delaware or District of Columbia or Hawaii or Iowa or Louisiana or Mississippi or Nebraska or New Mexico or Rhode Island or South Dakota or West Virginia or United States
$140k/yr HybridFull Time
TeamSnap
TeamSnap: Software platform for managing youth sports teams and leagues.
2+ YOE2+ years software engineering experience; strong backend skills with Node and TypeScript/JavaScript, frontend experience with React, SQL/relational databases, distributed systems and API development.
Node, TypeScript, JavaScript, React, SQL, MySQL, GCP Cloud SQL
1mo
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Interoperability Developer II
Dover, Delaware, United States
$79k-$122k/yr OnsiteFull Time
Bayhealth
Bayhealth: Provides comprehensive medical care and emergency services in Delaware.
5+ YOEBachelor's degree, related certification within 6 months if not already obtained, 5+ years healthcare IT experience with HL7 familiarity; experience designing, developing, testing, and tuning interfaces (FHIR, APIs, Care Everywhere, HISPs).
HL7, FHIR, APIs, Care Everywhere, HISPs
2w
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Senior Software Engineer
Connecticut or West Virginia or South Carolina or Pennsylvania or New Hampshire or Hawaii or California or Michigan or Kentucky or Arizona or New Mexico or Nevada or Florida or Alaska or Washington or Oregon or Texas or Alabama or Mississippi or Tennessee or Illinois or Wisconsin or Louisiana or Arkansas or Missouri or Iowa or Minnesota or Oklahoma or Kansas or Nebraska or South Dakota or North Dakota or Colorado or Wyoming or Idaho or Montana or Utah or Vermont or North Carolina or Massachusetts or Georgia or Rhode Island or New York or Maryland or Delaware or Virginia or Ohio or New Jersey or Maine
$110k-$140k/yr RemoteFull Time
Worksoft: Automation platform for enterprise business process testing and discovery.
10+ YOE10+ years web development experience (C#, .NET, ASP.NET Core) and production AI/ML experience (LLMs, PyTorch/TensorFlow, LangChain, etc.); Bachelor’s in CS/Engineering or 15+ years experience; strong problem solving and customer-facing troubleshooting skills.
OpenAI, Azure OpenAI, Anthropic Claude, Gemini, PyTorch, TensorFlow, scikit-learn, ML.Net, LangChain, Semantic Kernel, RAG, vector databases, LLMs, ASP.Net Core, Web APIs, REST, JWT, OAuth, Azure AD/Entra ID, Blazor, Angular, MS Sql Server, EF Core, WinForms, WPF, .Net MAUI, Service Bus, Kafka, MSBuild, Git
1mo
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Staff Software Development Engineer (Agentic AI/ML)
Richardson or New York or Georgia or Maryland or Massachusetts or North Carolina or Florida or Pennsylvania or New Jersey or Delaware
$118k-$261k/yr HybridFull Time
CVS Health
CVS HealthNYSE: CVS: Provides retail pharmacy, health insurance, and pharmacy benefit management services.
7+ YOE7+ years ML/software engineering experience, 5+ years leading projects, 5+ years Python, 2+ years agentic AI/ML, experience with APIs, microservices, Git, cloud (Azure/GCP), LLMs, vector DBs, and model deployment.
Python, Git, APIs, microservices, CI/CD, real-time streaming, Azure, GCP, IBMi AS400, LLMs, vector databases, orchestration frameworks, prompt engineering, retrieval-augmented generation (RAG), RxClaim, DevSecOps, DataOps, XP, Agile
1mo
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Senior Software Engineer Test
California or New Jersey or New York or Washington or Hawaii or Alaska or Maryland or Connecticut or Rhode Island or Massachusetts or Nevada or Oregon or Arizona or Colorado or Wyoming or Texas or North Dakota or Minnesota or Missouri or Illinois or Wisconsin or Florida or Georgia or Michigan or Ohio or Virginia or Pennsylvania or Delaware or Vermont or New Hampshire or Maine or Utah or Idaho or Montana or New Mexico or South Dakota or Nebraska or Kansas or Oklahoma or Iowa or Arkansas or Louisiana or Mississippi or Alabama or Tennessee or Kentucky or Indiana or South Carolina or North Carolina or West Virginia or United States
$94k-$179k/yr RemoteFull Time
Mercury Insurance
Mercury InsuranceNYSE: MCY: Provider of personal and commercial insurance coverage.
5+ YOEBachelor's in CS or related (or equivalent experience), 5+ years industry experience, 3+ years Java/Python and automation/framework development, CI/CD, containerization, cloud, performance and API testing experience.
Jenkins, GitHub, JMeter, LoadRunner, Selenium, TestNG, JUnit, Appium, Docker, Kubernetes, AWS, Google Cloud, Azure, Postman, SoapUI, Curl, Insomnia, Java, Python, JavaScript
3w
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Senior Drupal Developer, (Senior Consultant, Engineering & Technical Services)
Baltimore or Alabama or California or Delaware or District of Columbia or Florida or Georgia or Maryland or New Jersey or New York or North Carolina or Pennsylvania or South Carolina or Tennessee or Texas or Virginia or West Virginia
$121k-$140k/yr RemoteFull Time
Fearless
Fearless: Digital services firm delivering IT solutions for government agencies.
7+ YOE7+ years developing Drupal (9/10/11), strong PHP/Twig/JavaScript skills, REST API integration, cloud and CI/CD experience, accessibility and security best practices, ability to obtain Public Trust clearance, Bachelor's degree or equivalent.
Drupal, PHP, Twig, JavaScript, Composer, RESTful APIs, CI/CD, AWS, cloud.gov, AWS GovCloud, Acquia
1mo
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Full Stack Software Developer - Mid-Senior Level
Farmington or Connecticut or Massachusetts or Delaware or District of Columbia or New Jersey or New York or Nevada or North Dakota or California or Colorado or Oregon or Rhode Island or Maryland or Montana or Minnesota or Idaho or Wyoming or Washington or Alaska or Hawaii or Puerto Rico or United States
$80k-$85k/yr RemoteFull Time
ACD Direct
ACD Direct: Provides contact center and fundraising technology for non-profit organizations.
3+ YOE3+ years full stack development; strong Angular (v12+) and Lucee/CFML or similar backend experience; SQL Server, REST API integration, Git; demonstrated use of AI coding assistants.
Lucee, CFML, Angular, SQL Server, Git, GitHub, GitHub Actions, Jira, REST APIs, Claude, ChatGPT, Copilot, Cursor, Stripe, CyberSource, Paya, Microsoft 365, Blackbaud SKY API, Mailchimp APIs
3d
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Java Engineer
New Castle, Delaware, United States
$80k-$95k/yr OnsiteFull Time
Tata Consultancy Services
Tata Consultancy ServicesNational Stock Exchange of India: TCS: Global provider of IT services, consulting, and business solutions.
6+ YOE6+ years experience building enterprise frontend applications using Angular (v18+), TypeScript, RxJS and AG Grid; strong REST API integration, caching, frontend design patterns, and performance optimization; bachelor in computer science.
Angular (v18+), TypeScript, RxJS, AG Grid (Enterprise), RESTful APIs
2w
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Sr Aderant Engineer
Reston or San Diego or San Francisco or Washington or Wilmington or Phoenix or Los Angeles or Houston or Boston or Austin or Atlanta or Raleigh or Baltimore or New York or Dallas or Palo Alto or Short Hills or Minneapolis or Chicago or Seattle or Philadelphia or Miami
$113k-$179k/yr HybridFull Time
DLA Piper
DLA Piper: Global law firm providing comprehensive legal and business services.
5+ YOE5+ years supporting Aderant Expert and enterprise financial/practice management systems, strong backend development and SQL skills, experience with integrations/APIs, bachelor's in CS/IT, analytical and troubleshooting ability.
Aderant Expert, SQL, APIs
3d
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Sr TME for AI Security, API Security & DevOps
Texas or Alaska or Arizona or Arkansas or California or Colorado or Delaware or Florida or Georgia or Idaho or Illinois or Indiana or Iowa or Kansas or Kentucky or Louisiana or Maine or Maryland or Massachusetts or Michigan or Minnesota or Mississippi or Missouri or Montana or Nebraska or Nevada or New Hampshire or New Jersey or New Mexico or New York or North Carolina or North Dakota or Ohio or Oklahoma or Oregon or Pennsylvania or Rhode Island or South Carolina or South Dakota or Tennessee or Utah or Vermont or Virginia or West Virginia or Alabama or Wisconsin or Wyoming or New York (Metro)
$126k-$190k/yr RemoteFull Time
F5
F5NASDAQ: FFIV: Provides application delivery networking and multi-cloud security solutions.
8+ YOE8+ years technical experience; proficiency with Terraform, Ansible, cloud platforms, Kubernetes/Docker; strong application security knowledge (WAF, OWASP, API Security); scripting, automation, and technical content creation skills.
Terraform, Ansible, Kubernetes, Docker, AWS, Azure, GCP, GitHub, BIG-IP, NGINX, F5 Distributed Cloud, F5 AI Guardrails, OWASP, MITRE ATLAS