37 api test engineer jobs at 33 companies in Frederick, CO
5d
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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
3mo
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Principal Integration and Test Engineer
Boulder, Colorado, United States
$160k-$180k/yr OnsiteFull Time
3+ YOEDesign, develop, and execute CI/CD tests; verify system functionality; collaborate in Agile team; DoD Secret clearance.
Jira, Confluence, GitLab CI/CD, Docker, APIs
2mo
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Mid-Level Test Engineer (TS/SCI with CI Poly Required)
Aurora, Colorado, United States
$80k-$100k/yr OnsiteFull Time
2+ YOE2-5 years software testing, TS/SCI with CI Poly required, automated testing, REST API testing, CI/CD, strong programming in JS/TS.
Cypress, Playwright, Selenium, Jest, Mocha, Postman, REST Assured, Supertest, k6, JMeter, Gatling, Pact, Docker, Kubernetes, Go, Node.js, Python, Cucumber, SpecFlow, AWS
1mo
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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
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
2w
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R&D Engineer SW Quality 3
Broomfield, Colorado, United States
$91k-$146k/yr OnsiteFull Time
8+ YOEBachelor's in engineering, 8+ years software testing experience, strong automation (Python), Linux/Windows/VMware skills, networking and SAN knowledge, JIRA and REST API experience.
Python, Linux, Windows, VMware, JIRA, REST API, Claude Code, Gemini AI
1mo
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QA/UAT Engineer
Toronto or Vancouver or San Francisco or Denver or New York City
$100k-$150k/yr RemoteFull Time
3+ YOE3+ years QA/SDET experience; strong test automation, API and browser testing, Go familiarity, CI/CD and cloud-native tooling, and experience with AI-assisted testing tools.
Go (Golang), gRPC, REST, Playwright, Cypress, Selenium, Claude Code, Codex, Cursor, Postman, grpcurl, k6, Docker, Kubernetes, GitHub Actions, kubectl, GitOps, TypeScript, Python
5d
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Senior / Principal Lunar Ground Systems Engineer
Denver, Colorado, United States
$120k-$150k/yr HybridFull Time
7+ YOEUS citizen/PR eligible for DoD SECRET, 7+ years SATCOM experience with RF systems, real-time operations support, hands-on RF testing, Linux and RESTful API familiarity, BS in engineering preferred.
Linux, RESTful API, CCSDS, DVB-S2, Spectrum analyzer, Signal generator, Software modem
1w
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Associate Quality Assurance Engineer Denver (Hybrid)
Denver, Colorado, United States
$70k-$78k/yr HybridFull Time
Bachelor's degree or equivalent in CS/IT/Engineering, knowledge of software testing methodologies, strong analytical and communication skills, experience with manual testing and defect tracking; SQL, API or scripting familiarity preferred.
SQL, APIs
1mo
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Full Stack Software Engineer
Aurora or Philadelphia
$82k-$172k/yr OnsiteFull Time
5+ YOEBachelor's in CS or related, TS/SCI with Polygraph required, 5+ years OO experience (Python focus), 2+ years JavaScript/TypeScript, SDLC and microservices experience, API development, unit/integration testing, Agile, ability to work onsite full time.
Python, JavaScript, TypeScript, AWS, Azure, Kubernetes, React, Angular, Git, GitLab, Jira, Confluence
2w
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Software Engineer - Dice
Denver or Des Moines or United States
$100k-$140k/yr HybridFull Time
Production experience with Node.js and TypeScript, RESTful APIs, NextJS/React, AWS, CI/CD and automated testing (Playwright); strong engineering judgment and collaboration skills.
Claude Code, Codex, Gemini CLI, Node.js, TypeScript, RESTful APIs, NextJS, React, AWS, CI/CD, Playwright, GraphQL, Docker, Fargate, Kubernetes
3w
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Automation Engineer
Aurora or Herndon
$113k-$169k/yr OnsiteFull Time
2+ YOE2+ years software testing experience; proficiency with automated testing frameworks, integration and REST API testing, CI/CD integration, Git, strong debugging and communication skills.
Cypress, Git, JavaScript, TypeScript, Playwright, Selenium, Jest, Mocha, Postman, REST, Assured, Supertest, k6, JMeter, Gatling, Pact, Docker, Kubernetes, go, Node.js, Python, AWS, C2S
3mo
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Salesforce Engineer
Denver, Colorado, United States
$120k-$150k/yr HybridFull Time
Experienced Salesforce Engineer with enterprise development focus; strong Apex, Visualforce, LWC/Aura, and integration skills; familiar with REST/SOAP APIs, ETL tools; able to design, develop, test, and deploy Salesforce solutions.
Salesforce, Apex, Visualforce, Lightning Web Components, Aura Components, REST APIs, SOAP APIs, ETL tools, Process Builder, Flow, Workflow Rules, CI/CD, Cursor, Copilot
1mo
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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
2w
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Senior Software Engineer — PingOne Platform Administration & Security
Austin or Denver
$110k-$138k/yr OnsiteFull Time
5+ YOE5+ years software engineering; strong backend experience building production services; 3+ years Java; experience with NodeJS and TypeScript desired; REST APIs, cloud-native, CI/CD, automated testing, Agile, mentoring and technical leadership.
Java, NodeJS, TypeScript, MCP server, REST API, CI/CD
17h
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Data Engineer III
Denver, Colorado, United States
$80k-$100k/yr HybridFull Time
Requires advanced SQL, Python, GCP, BigQuery, dbt Core, REST APIs, Git/GitHub, data modeling, testing, CI/CD, and analytics platforms; senior candidates independently deliver enterprise data products and provide technical leadership.
Google Cloud Platform (GCP), BigQuery, dbt Core, SQL, Python, REST API, Git, GitHub, CI/CD, Looker, LookML, Power BI, Airflow, Cloud Composer, Cloud Run, GCP Gemini
3mo
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Software Engineer Lead
Denver or United States
$100k-$135k/yr RemoteFull Time
6+ YOEHands-on PHP 8.x with Laravel, Vue.js, REST APIs, TS; 6+ years PHP; 4+ years Vue; Git; Agile; SaaS; AWS/serverless; tests Pest/PHPUnit preferred.
PHP, Laravel, Vue.js, Tailwind CSS, REST API, Git, Pest, PHPUnit, NPM, Vite
1mo
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Software Engineer III
Denver, Colorado, United States
$99k-$198k/yr OnsiteFull Time
2+ YOEBachelor's in CS or related +2 years experience or 4 years' software engineering experience; proficiency in C/C++, Python, Go, JavaScript; cloud (AWS, GCP); CI/CD, debugging, API design, unit testing, and mentorship experience.
C/C++, Go, Python, JavaScript, AWS, GCP, CI/CD, WCAG 2.2 AA
1mo
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SDET/Automation QA Engineer
Columbus or Austin or Denver or United States
$125k-$145k/yr HybridFull Time
3+ YOE3+ years QA/SDET experience; build Playwright e2e and Postman API tests; write API tests in TypeScript; integrate tests into CI/CD; agile experience and strong communication skills.
Playwright, Postman, TypeScript, Slack
1mo
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Principal Software Engineer
Warsaw or Fridley or Mounds View or Brooklyn Park or Fort Worth or North Haven or Jacksonville or Boston or Lafayette
$153k-$229k/yr OnsiteFull Time
5+ YOEBachelor's + 7+ years software engineering or advanced degree + 5+ years; experience designing, developing, testing and deploying scalable, reliable software for manufacturing; leadership, mentoring, and cross-functional collaboration.
Ignition, deviseWISE, Azure, AWS, Docker, Kubernetes, Jenkins, Terraform, React, Angular, Node.js, ASP.NET, HTML5, CSS3, WebAPI, Microservices Architecture, Test-Driven Development, Agile & Scrum, CI/CD Pipelines, RESTful API Design, Java, C++, NET, Scala, Lua, Python, SQL
1w
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Software Quality Engineer III
Englewood, Colorado, United States
$72k-$103k/yr OnsiteFull Time
3+ YOE3-5 years QA/testing or related experience; bachelor’s degree or equivalent experience; experience with manual/regression testing, test automation, Salesforce testing, API testing; strong documentation and collaboration skills.
Salesforce, Linux
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