407 api developer jobs at 210 companies in Parker, CO

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
1mo
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API Integrations Developer
Denver, Colorado, United States
$119k-$133k/yr HybridFull Time
Colorado Access
Colorado Access: Provides managed care and health insurance for Medicaid members.
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
3w
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Senior Software Engineer (Hogan API)
Hopkins or Atlanta or Chicago or Charlotte or Englewood or Brookfield or Irving
$120k-$141k/yr HybridFull Time
U.S. Bank
U.S. BankNYSE: USB: Provider of personal, business, and institutional financial services.
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
4w
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Senior Software Engineer – API & Cloud Integrations (Java, AWS)
Denver or Cedar Rapids or Philadelphia
$94k-$120k/yr HybridFull Time
Transamerica
TransamericaNYSE: AEG: Provides insurance, retirement solutions, and investment products to customers.
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
2mo
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Software Engineer - Web Developer (TS Clearance CI Poly Eligible)
Littleton, Colorado, United States
OnsiteFull Time
North Point Technology
North Point Technology: Technology services and engineering for federal government missions.
Frontend web development, JavaScript, RESTful APIs, Agile, Git, 508 compliance, rapid learning, open-source, full-stack templates.
HTML, CSS, LESS, SASS, Bootstrap, JavaScript, jQuery, Backbone.js, Ember.js, D3, REST API, Git, GitHub, Rails, Express, Django, Kubernetes, Docker, Puppet, Jenkins
1mo
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Senior C#/.Net Developer
Lone Tree, Colorado, United States
$150k-$170k/yr OnsiteFull Time
Charles Schwab
Charles SchwabNYSE: SCHW: Financial services, brokerage, and investment management provider.
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
1mo
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GIS Developer
Denver, Colorado, United States
$30-$45/hr OnsiteFull Time
Congruex
Congruex: Designs and builds broadband and wireless communications infrastructure.
10+ YOE10+ years GIS development and architecture experience focused on ESRI technologies; strong Python, Arcade, .Net C#, ArcGIS APIs, FME Flow/Forms, ESRI Utility Network, and web GIS development skills.
ESRI Enterprise, AGOL, ArcGIS Enterprise, ArcGIS Online, Experience Builder, ArcGIS Experience Builder, ESRI JavaScript API, ArcGIS JavaScript SDK (4.x), Map SDK, JavaScript, TypeScript, HTML, CSS, Python, ArcPy, ArcGIS Python API, Arcade, .Net C#, Web2Py, FME Flow Server, FME Forms, SQL Server, REST APIs, JSON, Field Maps, Survey123, QuickCapture
1mo
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Senior Backend Engineer - Offroad
Missoula or Bozeman or Austin or Denver or Portland or Salt Lake City or Seattle
$146k-$182k/yr RemoteFull Time
onXmaps
onXmaps: Digital mapping and navigation apps for outdoor recreation.
7+ YOE7+ years in software development; distributed cloud APIs; Go; Vue; Docker/Kubernetes; Terraform; remote collaboration; travel for quarterly visits.
Go, Vue, Docker, Kubernetes, Terraform, API Development
1mo
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Staff SW Engineer
Denver, Colorado, United States
$124k-$199k/yr HybridFull Time
Visa
VisaNYSE: V: Global payment technology facilitating electronic funds transfers.
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
1mo
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Senior Software Engineer (AI-First/Agentic Development)
Denver, Colorado, United States
$115k-$145k/yr OnsiteFull Time
FRONTSTEPS
FRONTSTEPS: Software platform for HOA and community association management.
5+ YOE5+ years development experience with C#, Microsoft SQL Server, Entity Framework, MVC, Web APIs; 3+ years cloud architecture (Microsoft Azure); 1+ year AI-assisted development and Docker; TypeScript/JavaScript and React/Angular/Vue experience; Bachelor's in IT or equivalent experience.
Claude Code, Anti-gravity, GitHub Copilot, Docker, TypeScript, JavaScript, C#, Microsoft SQL Server, Entity Framework, MVC, Web API, Microsoft Azure, VM, Functions, LogicApps, ServiceBus, React, Angular, Vue, React Native, Microsoft Azure Pipelines, TCP/IP
1w
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Ticketing Application Developer II
Englewood, Colorado, United States
$63k-$90k/yr OnsiteFull Time
EchoStar
EchoStarNasdaq: SATS: Global provider of satellite solutions and wireless communications services.
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
3w
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Application Developer - Senior
Colorado Springs or Reston
$60k-$180k/yr HybridFull Time
Aleut Federal
Aleut Federal: Provides infrastructure and technical services to federal government agencies.
7+ YOE7+ years software development, 5+ years ServiceNow, Java knowledge, 4+ years development lead experience, integration/API development, IT-II/Tier 3/NACLC/ANACI eligibility or current Tier 3 investigation; relevant ServiceNow and agile certifications preferred.
ServiceNow, Java
2w
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.NET Application Developer (Junior & Mid-Level)
Broomfield, Colorado, United States
HybridFull Time
Sonepar
Sonepar: Global distributor of electrical products and B2B solutions.
3+ YOEBachelor's degree in CS/IT, 3+ years full-stack application development experience, proficiency with .NET/ASP.NET MVC, C#, Visual Studio, SQL Server, web technologies (JavaScript/TypeScript/HTML/CSS), and APIs.
Microsoft .NET Framework, ASP.NET MVC, C#, Visual Studio, Microsoft SQL Server, RESTful services, Web API, XML, JSON, JavaScript, TypeScript, jQuery, HTML, CSS
3d
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Senior Application Developer
Denver or Springfield or Sterling or St. Louis
$75k-$158k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
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
6d
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App Engineer
Denver, Colorado, United States
$100k-$115k/yr HybridFull Time
Janus Henderson
Janus HendersonNYSE: JHG: Provides global asset management and investment advisory services.
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
1mo
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Software Engineer
Aurora, Colorado, United States
$69k-$158k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
3+ YOE3+ years designing and developing software; proficiency with Python or Java; experience building RESTful APIs, cloud environments (AWS/Azure/GCP), and full-stack development; TS/SCI clearance with polygraph; Bachelor's in STEM required.
Python, Java, Vue, Node, AWS, Azure, GCP, RESTful APIs, Linux, Docker, Kubernetes, C#, C, C++, JavaScript, React
3w
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Senior Integrations Engineer
Denver, Colorado, United States
$160k-$200k/yr OnsiteFull Time
Cobalt AI
Cobalt AI: Provides autonomous indoor security robots and remote AI monitoring.
5+ YOE5+ years software engineering experience focused on integrations/API development; strong Python async skills, experience with third-party APIs/webhooks, resilient pipelines, metrics/tracing, Docker/ECS; Kubernetes and security systems a plus.
Python, asyncio, aiohttp, REST, MQTT, SignalR, webhooks, webhook-handler, Datadog, Docker, ECS, Kubernetes, EKS, WebSocket, Django, GraphQL, Rust
3mo
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Senior Software Developer
Louisville, Colorado, United States
$118k-$144k/yr OnsiteFull Time
CableLabs
CableLabs: Develops next-generation technology specifications for the global broadband industry
5+ YOE5+ years in professional software development; strong Python; SQL; REST APIs; Git; CI/CD; excellent communication; Bachelor’s degree in CS/Software Engineering.
Python, SQL, Git, GitLab CI, pytest, REST APIs, JavaScript, TypeScript, Node.js
1mo
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Front End Software Engineer
San Francisco or Denver or New York City
$150k-$200k/yr OnsiteFull Time
Candid Health
Candid Health: Automates medical billing and revenue cycle management for healthcare providers.
3+ YOEBachelor's in CS or similar, 3+ years software engineering experience, proficiency with HTML, CSS, React, TypeScript and API development; familiarity with SSR, GraphQL, Tailwind, Firebase, and Codegen; strong UX instincts.
HTML, CSS, React, TypeScript, API, GraphQL, Tailwind, Firebase, Codegen
3w
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Lead System Engineer
Orlando or Tampa or Lakeland or Melbourne or Daytona Beach or Las Vegas or Denver or Houston
$70-$75/hr RemoteFull Time, Contract
CAI
CAI: Provides global IT services and contingent workforce management solutions.
7+ YOE2+ Mgmt7+ years full‑stack development, 2+ years lead experience; hands‑on with Oracle/PL‑SQL, APIs/integrations, Microsoft Azure (.NET), Angular, Python; DevOps/CI/CD; experience with AI tools; strong client communication; must have work authorization not requiring sponsorship.
Oracle, PL/SQL, APIs, Microsoft Azure, .NET, Angular, Python, GitHub Copilot, Azure OpenAI, TestGPT, Docker, Kubernetes, CI/CD
2mo
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Full Stack Engineer
Denver, Colorado, United States
$115k-$130k/yr OnsiteFull Time
AIR Communities
AIR Communities: Owns and operates residential apartment communities across the US.
5+ YOE5+ years full-stack development with C#, .NET, React; strong API, database, security, and cloud experience.
C#, .NET, ASP.NET Core, Entity Framework, React.js, JavaScript, TypeScript, SQL, Azure, AWS, GCP, CI/CD, Git