350 api developer jobs at 191 companies in Foxfield, CO
2w
Save
Mark Applied
Hide
API Developer
Pittsburgh or Cleveland or Dallas or Birmingham or Phoenix or Denver
OnsiteFull Time
8+ YOE8+ years Java/J2EE experience building RESTful APIs using Spring Boot and microservices; experience with DevOps, Kafka, IBM MQ, SQL/NoSQL and cloud platforms required.
Java, J2EE, Spring Boot, Microservices, REST API, Angular, XML, JSON, Swagger, Jenkins, uDeploy, GIT, Kafka, IBM MQ, SQL, No Sql, AWS, Azure, GitHub, CI/CD, React, JavaScript, HTML, CSS, JSON Web Token (JWT), UML, XPath
1w
Save
Mark Applied
Hide
API Engineer
Boulder, Colorado, United States
$80k-$110k/yr HybridFull Time
1+ YOEExperience building and maintaining APIs, data schemas/versioning, testing and CI/CD; proficiency with Git, Linux, and modern programming languages; Master's or Bachelor's plus 1-2 years API/pipeline experience.
Python, REST, JSON, OpenAPI, JSON Schema, Git, Linux, Docker, Terraform, CloudFormation, GitHub Actions, GeoJSON, GeoParquet, R, Shiny, Rust, AWS
2mo
Save
Mark Applied
Hide
API Integrations Developer
Denver, Colorado, United States
$119k-$133k/yr HybridFull Time
4+ YOEBachelor's in CS or related required; 4+ years backend experience (Python, Node.js, Java, or .NET); HL7 FHIR and X12 EDI experience; strong REST API, security (OAuth2, JWT, mTLS), SQL, and HIPAA knowledge; experience with cloud and CI/CD.
Python, Flask, FastAPI, Django, Node.js, Java, .NET, OpenAPI/Swagger, Postman, X12 EDI, HL7 FHIR, HL7 v2, CDA, EHRs, Docker, Kubernetes, GitHub Actions, Azure DevOps, Jenkins, ELK, Datadog, Prometheus, Grafana, AWS, Azure, GCP, SQL Server, Snowflake, Data Vault 2.0, pytest, JUnit, Pact, k6, Locust, OAuth2, JWT, mTLS, RBAC/ABAC, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Outlook, Microsoft SharePoint
3d
Save
Mark Applied
Hide
Software Engineer - C#/Angular/API
Pittsburgh or Denver or Birmingham or Farmers Branch or Cleveland or Phoenix or Strongsville
$75k-$138k/yr OnsiteFull Time
3+ YOERequires a bachelor's degree or equivalent experience and 3+ years of enterprise software development experience with C#, .NET, Angular, REST APIs, SQL Server, T-SQL, and Agile methodologies.
C#, .NET, ASP.NET Core, Angular, Entity Framework Core, SQL Server, RESTful APIs, T-SQL, Microsoft Copilot, ChatGPT, Claude, CI/CD, DevOps, Scrum
1mo
Save
Mark Applied
Hide
Senior Software Engineer (Hogan API)
Hopkins or Atlanta or Chicago or Charlotte or Englewood or Brookfield or Irving
$120k-$141k/yr HybridFull Time
5+ YOEBachelor's degree or equivalent and 5+ years relevant experience. Experience with mainframe/Hogan development (COBOL, JCL, CICS), APIs, system design, testing, security, and cross-team collaboration; Scrum familiarity.
Hogan COBOL, JCL, CICS, JSON, Splunk, IMS Database, GitLab, IDz/RDz (IBM Developer for zOS), Jira
1w
Save
Mark Applied
Hide
Director, eCommerce Syndicated API Platforms
Stamford or St. Louis or Greenwood Village
HybridFull Time
10+ YOE3+ MgmtBachelor's degree or equivalent,10+ years in technical program delivery or API platforms,9+ years partner enablement,API strategy and integrations,leadership in launch planning and stakeholder alignment,strong API and developer experience skills.
REST APIs, API gateway, cloud-based platforms
1mo
Save
Mark Applied
Hide
Senior Software Engineer – API & Cloud Integrations (Java, AWS)
Denver or Cedar Rapids or Philadelphia
$94k-$120k/yr HybridFull Time
3+ YOEBachelor’s or equivalent experience; 3+ years Core Java; experience with Spring, microservices, APIs, databases (RDBMS/NoSQL), cloud (AWS/Azure), CI/CD, and integration frameworks; strong analytical and communication skills.
Java, Core Java, Spring Framework, Spring Boot, Spring MVC, J2EE, Entity Framework, IIS, Swagger, Swagger API, OData, .NET API 2, .NET API Core, AutoMapper, MS Cosmos DB, Microsoft Cosmos DB, Apache Cassandra, Amazon DynamoDB, AWS, Azure, EC2, ECS, S3, Kinesis, Microsoft VMs, Microsoft Blob, Microsoft Data Factory, Microsoft SQL Data Warehouse, Microsoft ARM Templates, Microsoft Event Hubs, Visual Studio, Git, Bitbucket, Maven, Jenkins, Nexus, SQL Management Studio, NUnit, Ajax, MS HPC, SageMaker, Spark, API Gateways, Apache Camel, Zookeeper, Kafka, Docker, OpenShift, Kubernetes, Angular, React, Vue.js, ASP.NET MVC, HTML, JS, CSS
2w
Save
Mark Applied
Hide
Full-Stack Developer
Broomfield, Colorado, United States
HybridFull Time
4+ YOEBachelor's in Computer Science or related, 4+ years full-stack development, proficiency with .NET, C#, ASP.NET MVC, REST/APIs, JavaScript/TypeScript, and Microsoft SQL Server.
.NET, .NET Framework, ASP.NET, MVC, C#, Microsoft Visual Studio, Microsoft SQL Server, XML, JSON, TypeScript, JavaScript, jQuery, HTML, CSS, REST, Web API
2mo
Save
Mark Applied
Hide
Senior C#/.Net Developer
Lone Tree, Colorado, United States
$150k-$170k/yr OnsiteFull Time
7+ YOE7+ years in software development with .NET, C#, DDD, REST APIs, SQL Server, CI/CD, and leadership.
.NET, C#, ASP.NET, REST API, SQL Server, GitHub, CI/CD, IIS, Windows Services, DDD, SOLID, Unit Testing, Integration Testing
2w
Save
Mark Applied
Hide
Senior Full-Stack Lead Developer
Broomfield, Colorado, United States
$89k-$125k/yr HybridFull Time
5+ YOE5+ years C# application development, Web API and Agile experience; SQL Server, HTML/CSS/JavaScript; experience leading developers, BS/MS in CS or related field; strong communication and leadership.
C#, .NET, Web API, Angular, WPF, Microsoft SQL Server, HTML, CSS, JavaScript, Git
1mo
Save
Mark Applied
Hide
AI Software Developer
Grand Rapids or Denver or Chicago or Massachusetts or New Hampshire or New York or North Carolina or Oregon or Texas or Utah or Vermont or Virginia or United States or Canada
$120k-$160k/yr RemoteFull Time
3+ YOE3+ years professional software development; experience with Claude Code and Anthropic API; strong TypeScript and React; knowledge of prompt engineering, REST APIs, async patterns; ability to review AI-generated code and write tests.
Claude Code, Anthropic API, TypeScript, React, REST APIs
1mo
Save
Mark Applied
Hide
Staff SW Engineer
Denver, Colorado, United States
$124k-$199k/yr HybridFull Time
5+ YOE5+ years relevant experience (or equivalent advanced degree/experience), strong backend development (e.g., Java), API and database expertise, systems integration and data structure knowledge, familiarity with Kubernetes/Docker, strong collaboration and communication.
Java, APIs, Kubernetes, Docker
3d
Save
Mark Applied
Hide
OutSystems Developer
Bellevue or Dallas or Denver or New York City or Pasadena or Wichita
$100k-$130k/yr OnsiteFull Time
3+ YOEBachelor's degree or equivalent experience; 3–5 years of software development experience with OutSystems, REST APIs, SQL, relational databases, HTML, CSS, and JavaScript. Agile and SDLC knowledge required.
OutSystems, OutSystems Service Studio, Integration Studio, REST APIs, API Connectors, SQL, HTML, CSS, JavaScript, Microsoft Azure, Microsoft SharePoint, Microsoft Power Apps, Microsoft Power Automate, Microsoft Power BI, Microsoft Dataverse, Microsoft 365, Microsoft Teams, Git, CI/CD
1mo
Save
Mark Applied
Hide
Ticketing Application Developer II
Englewood, Colorado, United States
$63k-$90k/yr OnsiteFull Time
Bachelor's degree or equivalent experience, significant application development experience (case management/ticketing), advanced Python and JavaScript, API design, Microsoft SQL Server and AWS Athena, CI/CD pipeline familiarity, AI literacy, strong collaboration and documentation skills.
Python, JavaScript, Microsoft SQL Server, AWS Athena, API, CI/CD
1d
Save
Mark Applied
Hide
Software Engineer – Frontend Web Developer
Littleton or Denver
$134k-$181k/yr OnsiteFull Time
4+ YOEBachelor’s degree or equivalent practical experience, 4+ years of software or frontend development, active Top Secret clearance, and experience with frontend applications, JavaScript, APIs, Git, Agile, and accessible interfaces.
HTML5, CSS3, LESS, SASS, Bootstrap, Bourbon, JavaScript, Angular, React, Git, GitHub, GitLab, Rails, Express, Django, RESTful APIs, Jenkins, Puppet, Docker, Kubernetes, D3, SAFe
2mo
Save
Mark Applied
Hide
Engineer, Development
Denver or Atlanta
HybridFull Time
1+ YOE1+ year software development experience; Bachelor's in computer science/engineering required (Master's preferred); experience with microservices, REST APIs, authentication, Python/.NET/C#/Angular/SQL and Azure; ML framework experience preferred.
Angular, TypeScript, Python, .NET Framework, C#, SQL, T SQL, Azure, Azure OpenAI, PyTorch, TensorFlow, scikit learn
2d
Save
Mark Applied
Hide
Software Engineer
Denver, Colorado, United States
HybridFull Time
3+ YOEBachelor's degree or equivalent practical experience, 3+ years of software engineering experience, full-stack and API development, cloud platform familiarity, Git, debugging, communication, and AI-powered development experience.
Azure, AWS, Google Cloud, Git, REST APIs, CI/CD, AI, GenAI
3w
Save
Mark Applied
Hide
Senior Application Developer
Denver or Springfield or Sterling or St. Louis
$75k-$158k/yr OnsiteFull Time
8+ YOEBachelor's in CS or related,8+ years software development experience,expert Java and/or Python,REST APIs,databases,CI/CD,GIT,TS/SCI clearance and polygraph willingness.
Java, Python, ArcGIS, GeoServer, OpenLayers, Cesium, Kubernetes, AWS/C2S, Git, CI/CD
4w
Save
Mark Applied
Hide
App Engineer
Denver, Colorado, United States
$100k-$115k/yr HybridFull Time
Proficient PHP and WordPress multisite development, React/Gutenberg block development, SCSS/CSS, JavaScript (ES6+), Git, Composer, npm, Docker, Jira; experience working in Agile teams and integrating third-party APIs.
PHP, WordPress, WordPress VIP, React, JavaScript (ES6+), SCSS, Git, Docker, Composer, npm, Jira, GitHub Copilot, PHP Unit, Veracode
1d
Save
Mark Applied
Hide
Software Engineer
King of Prussia or Aurora
$69k-$142k/yr HybridFull Time
3+ YOEBachelor's degree in computer science or related field plus 3 years of software development experience, or equivalent. Requires modern programming, Git, Agile, RESTful API, web development, and willingness to obtain TS/SCI clearance.
Python, Java, Spring Boot, React, AWS, Azure, Kubernetes, JavaScript, TypeScript, C#, Git, RESTful APIs, Docker, PostgreSQL, MySQL, Jenkins, GitLab CI, GitHub Actions
Explore Jobs