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Development Testing Engineer Jobs in Middletown, DE, US
100+ development testing engineer jobs from 58 companies hiring in Middletown, DE, US.
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Software Engineer Sr (Quality Testing Engineer- QA Testing)
Philadelphia, Pennsylvania, United States
$61k-$146k/yr HybridFull Time
3+ YOESenior software engineer focused on quality testing; experience with mainframe, manual/automated testing, scripting, JIRA/Xray, and change management.
JIRA, Xray, Mainframe, Test Automation, ServiceNow
2w
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Engineer 4, Software Development & Engineering-9770
Philadelphia, Pennsylvania, United States
HybridFull Time
5+ YOEBachelor’s degree in Computer Science or related field; 5 years Java/Spring development; AWS deployment; OAuth, JWT; security and performance tuning; API automation and testing; mentoring duties.
Java, Spring, JVM, OAuth, JWT, SAML, AWS, Profiler, JMeter, Gatling, Cucumber, Burp, JUnit, Spring Security, JSON, JWE
1w
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Associate Software Development Engineer (SDET), IT Software Engineers
Dresher or Baxter or Newton
RemoteFull Time
0+ YOEBachelor’s degree in CS/Engineering or related field; basic programming in C#, Python or Java; desire to learn in Agile environment; knowledge of testing concepts.
C#, Python, Java, PowerShell, Bash
1mo
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Software Development Engineer In Test (SDET)
Baltimore, Maryland, United States
$105k-$125k/yr HybridFull Time
3+ YOEBachelor's in CS/IT or related field; 3+ years in QA/SDET; AI-assisted testing experience; manual testing; Python; Playwright; CI/CD; Agile collaboration.
Python, Playwright, Robot Framework, GitHub Copilot, ChatGPT, Claude, Selenium, Cypress, CI/CD
1mo
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Research Engineering Technologist (Testing)
Exton, Pennsylvania, United States
OnsiteFull Time
2+ YOE5+ years polymer R&D with high school or a BS in polymer processing; strong lab, data, and testing skills; proficient in MS Office; independent problem solver.
Outlook, Word, Excel, Melt Flow Rate testing, Tensile testing, Izod impact testing, Dynatup impact, Injection Molding, Extrusion
1mo
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Engineering Development Support
Aberdeen Proving Ground, Maryland, United States
$75k-$158k/yr OnsiteFull Time
Perform electrical assembly, integration, testing, and PCB population; read schematics; soldering and troubleshooting; collaborate with engineers.
Soldering, Crimping, PCB assembly equipment, Electrical testing equipment, Wiring harnessing
1mo
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Packaging Engineer
Dover, Delaware, United States
OnsiteFull Time
Packaging engineering role in Dover, DE focusing on packaging development, testing, and process improvements.
1mo
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Lead Software Engineer - Sr. Java/AWS Developer
Wilmington, Delaware, United States
OnsiteFull Time
5+ YOE5+ years software engineering with Java and AWS; design, development, testing, and operations focus
Java, AWS, Docker, Kubernetes, REST, DataDog, Dynatrace, Splunk, CI/CD
3w
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Software Engineer-Mobile Development (Android)
Philadelphia, Pennsylvania, United States
$65k-$80k/yr OnsiteFull Time
5+ YOEStrong proficiency in React Native with Android focus; solid Android fundamentals; experience with Android Studio, Gradle, Android SDK; Java/Kotlin/JavaScript/TypeScript; REST APIs; Git; AWS; SQL databases; automated tests; team collaboration.
React Native, Java, Kotlin, Android Studio, Gradle, Retrofit, Room, WorkManager, Google Play Console, AWS, Git, SQL, PostgreSQL, Oracle, MSSQL, Node.js, .NET Core, PHP, Docker, CI/CD, API design and development
2mo
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Test Engineer - Digital Relay Test Automation
King of Prussia, Pennsylvania, United States
$98k-$144k/yr OnsiteFull Time
2+ YOEB.S. in Electrical Engineering; 2+ years in designing and developing production tests; strong writing, documentation, and communication; programming experience; team player; background check and drug test.
Python, Perl
1mo
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Flight Test Engineer
Coatesville, Pennsylvania, United States
$140k-$160k/yr OnsiteFull Time
5+ YOE5+ years in VTOL/system development; experience with mechanical/electrical testing; Python and design software proficiency; bachelor’s in engineering; ability to obtain security clearance.
Python, Microsoft Office, Engineering design software
3w
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Manufacturing Engineer (Frederica, DE, US, 19946)
Frederica, Delaware, United States
OnsiteFull Time
3+ YOEBachelor’s degree in engineering; 3+ years in manufacturing/electrical/test engineering or related hybrid role; hands-on hardware development and testing; knowledge of DFM/DFMA and test planning.
AutoCAD, SolidWorks, PLC, DAQ, Programming
2w
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Test Engineer III
Aberdeen or Aberdeen
$90k-$110k/yr OnsiteFull Time
Techximius: Provides specialized IT and engineering services for defense missions.
4+ YOEExperience in test and evaluation, system validation, or IT/system troubleshooting; develop/execute test plans; strong documentation; troubleshoot hardware, software, and networks.
1mo
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Engineer IV - Control Systems
Philadelphia, Pennsylvania, United States
$113k-$136k/yr OnsiteFull Time
10+ YOE10+ years as a control systems engineer; BS in Engineering; PLC development/testing/installation; leadership experience; documentation such as SCDs.
Rockwell ControlLogix, Studio 5000, Siemens SIMATIC Step 7, TIA Portal
1mo
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Manuel Test Engineer
Annapolis Junction, Maryland, United States
$150k-$240k/yr OnsiteFull Time
8+ YOEActive TS/SCI clearance with Polygraph; 8+ years of relevant experience; full SDLC testing; experience with formal test events; collaboration with developers; lab testing with physical equipment; strong communication.
Automated testing tools, Java, Shell, Python
2mo
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Senior Software Test Engineer (onsite)
New Freedom, Pennsylvania, United States
$80k-$110k/yr OnsiteFull Time
5+ YOESenior Software Test Engineer with 5+ years in software development and testing; 4+ years manual testing (preferably automated); proficient in C/C++, Python; hardware testing with oscilloscopes, logic analyzers, and JTAG; experience leading testing for embedded systems; US citizen or permanent resident.
C, C++, Python, Oscilloscopes, Logic Analyzers, JTAG
1mo
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Mulesoft Developer
Malvern or Remote
RemoteFull Time
4+ YOE4+ years MuleSoft development; design, develop, test, deploy MuleSoft integrations; Salesforce and ERP experience; API-led design; MuleSoft certifications.
MuleSoft Anypoint Platform, RAML, DataWeave, Anypoint Studio, Java, XML, JSON, SQL, Salesforce REST, Salesforce SOAP, Salesforce Bulk API, Salesforce Platform Events, Splunk, CloudHub, API Manager, runtime monitoring
3w
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Quality Test Engineer III
Philadelphia, Pennsylvania, United States
$72k-$119k/yr OnsiteFull Time
Design, develop, and maintain automated test frameworks; RESTful API testing; CI/CD integration; accessibility, performance testing; JS/TS expertise.
Webdriver.io, Playwright, JavaScript, TypeScript, RESTful API testing, Cucumber, Gherkin, Jenkins, GitHub Actions, BrowserStack, Axe, Pa11y, WAVE, K6, Locust, JMeter
1mo
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RF/Digital Test & Principal RF/Digital Test Engineer 2nd shift
Baltimore, Maryland, United States
$88k-$131k/yr OnsiteFull Time
2+ YOEBachelor's or Master's in Electrical Engineering or related STEM field; RF and digital hardware experience; DoD Secret clearance; 2+ years (Bachelor) or 0+ years (Master) for RF/Digital Test Engineer; 5+ years (Bachelor) or 3+ years (Master) for Principal; 2nd shift; U.S. citizenship; relocation may be available.
RF test equipment, oscilloscopes, power meter, spectrum analyzer, signal generator, digital engineering
4d
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Software Engineer
Aberdeen Proving Ground or Fort Belvoir or Huntsville or Austin or Tobyhanna Army Depot or Letterkenny Army Depot or Lakehurst
OnsiteFull Time
5+ YOE5+ years of experience in software development; strong ability to design, develop, test, and maintain software systems; experience collaborating with cross-functional teams.
1w
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Senior Quality Test Engineer II
Philadelphia, Pennsylvania, United States
$87k-$144k/yr OnsiteFull Time
Automated QA engineer with JavaScript/TypeScript, Webdriver.io or Playwright, API testing, CI/CD, and accessibility/performance testing.
Webdriver.io, Playwright, RESTful API testing, Cucumber, Jenkins, GitHub Actions, BrowserStack, Axe, Pa11y, WAVE, K6, Locust, JMeter
1w
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Senior Lead Software Engineer - Python/PySpark/AWS/AI
Wilmington or Plano
OnsiteFull Time
5+ YOE5+ years of applying software engineering with hands-on design, development, testing, and operations.
Python, PySpark, AWS, Databricks, Snowflake, ETL, datapipelines
2mo
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Software Engineer
Baltimore, Maryland, United States
$85k-$130k/yr HybridFull Time
Campbell & Company: A systematic investment manager specializing in quantitative multi-strategy portfolios.
3+ YOE3+ years in C#/.NET development; SQL Server/Oracle experience; CI/CD and testing; strong communication and problem-solving.
C#, NET, Python, ASP.NET, SQL Server, Oracle, CI/CD, Testing Frameworks
3w
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Manufacturing Engineer Technician
Swedesboro, New Jersey, United States
$30-$35/hr OnsiteFull Time
3+ YOEAssist design, development, and testing of manufacturing processes; monitor production; troubleshoot equipment; analyze data; document procedures; support safety and quality.
CAD, SolidWorks, AutoCAD, ERP, Microsoft Office
4w
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Software Engineer (Mid-level)
Springfield, Pennsylvania, United States
HybridFull Time
3+ YOE3-5 years professional software development; cross-stack ability; strong collaboration; able to leverage AI tools; portfolio
.NET Core, Node.js, Python, React, Next.js, TypeScript, Azure, SQL Server, Microservices, Functions, Lambdas, CI/CD, Unit Testing, Automated Testing
2w
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Ruby on Rails Developer
Kennett Square, Pennsylvania, United States
$98k-$158k/yr OnsiteFull Time
5+ YOERails development, AWS core services, testing, CI/CD, databases, Agile
Ruby on Rails, AWS, RSpec, Capybara, MySQL/Aurora, GitHub Enterprise / GitHub Actions, HTML/CSS
18h
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Software Engineer Staff
King of Prussia, Pennsylvania, United States
OnsiteFull Time
TS/SCI w/ Poly clearance; backend software development on Linux; C/C++, Java; Agile (SAFe/Kanban/Scrum); design, development, testing; willingness to obtain poly.
C/C++, Java, Linux, Docker, Kubernetes, Git, Maven, Jenkins, Jira, Confluence, Matlab, STK, AWS
1mo
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Software Engineer
Buffalo Grove or Wilmington or Lewisville or Logan
RemoteFull Time
6+ YOE6+ years full stack software design/development; C#, .NET, ASP.NET, TypeScript, React; cloud (Azure/AWS/Google); microservices; containers (Docker/Kubernetes) and testing; strong communication and collaboration.
C#, DotNet, ASP.NET, TypeScript, React, Next.js, Vue.js, Svelte, Azure, AWS, Google Cloud, Docker, Kubernetes
4w
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Research Development Project Technician
Lafayette Hill, Pennsylvania, United States
OnsiteFull Time
Onsite role in Lafayette Hill, PA; manages multiple projects; creates 2D drawings; designs labels for regulated applications; conducts lab testing; documents work.
AutoCAD LT
1d
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Application Engineer - III
Malvern, Pennsylvania, United States
HybridFull Time
5+ YOESenior application engineer with Java, microservices, AWS, test automation, SRE tools, AWS Aurora, Kafka; 5+ years software engineering; DevOps familiarity; API management; cloud/AWS knowledge; bachelor's degree.
Java, Microservices, AWS, Test Automation, SRE Tools, AWS Aurora, Kafka, Bamboo, Bitbucket, Git, GitHub, Glue, ECS, Lambda, AWS S3
1mo
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SDET Engineer
Philadelphia, Pennsylvania, United States
$72k-$130k/yr OnsiteFull Time
2+ YOEBachelor's degree plus 2 years' related experience or equivalent; 2-4 years in development languages and automation tools; Agile, end-to-end testing, problem solving, analytics; 18+ and authorized to work in the US.
TypeScript, JavaScript, Python, Java, Cypress, Selenium, TestNG, Appium, Sauce Labs, Rest Assured, Postman, Cucumber, Jasmine, Protractor
3w
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Software Systems Engineer
Auburn or Aberdeen
OnsiteFull Time
1+ YOEBachelor’s degree in engineering or computer science; software architecture and integration; use cases, requirements, testing, and documentation experience.
C++, cmake, Docker, Kubernetes, Helm, Git, CI/CD, APIs
3w
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Web Test Engineer
Aberdeen Proving Ground, Maryland, United States
RemoteFull Time
3+ YOE3+ years software testing and automation; automated web testing with Cypress/Selenium; Agile/Scrum experience; CI/CD familiarity; containerization with Docker/Kubernetes; strong troubleshooting.
Cypress, Selenium, TestNG, JUnit, Postman, REST Assured, SoapUI, GitLab CI, Docker, Kubernetes, Maven, Gradle, NPM, JMeter, Java, JavaScript, Cucumber, Gherkin, SQL, Git
2w
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Sr Quality Engineer
King of Prussia, Pennsylvania, United States
OnsiteFull Time
5+ YOE5+ years in software testing/automation; Bachelor's in CS/Engineering; experience with Playwright, Selenium, Cypress; CI/CD integration; Java/Python/Go/Rust; strong debugging and collaboration.
Playwright, Selenium, WebDriver, Gauge, Cypress, GitHub Actions, Azure DevOps, Jenkins, GitLab CI, Docker, Kubernetes, Prometheus, Grafana, Allure, JUnit
1mo
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Senior Engineer, SDET
Philadelphia, Pennsylvania, United States
$89k-$161k/yr OnsiteFull Time
5+ YOE5+ years in software testing, automation, and SDET with leadership of test automation strategies.
TypeScript, JavaScript, Python, Java, Cypress, Selenium, TestNG, Appium, Sauce Labs, Rest Assured, Postman, Cucumber, Jasmine, Protractor
2mo
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Robotic Software Engineer - Manipulation
Philadelphia, Pennsylvania, United States
OnsiteFull Time
3+ YOESenior robotics engineer with 3+ years in manipulation, motion planning, control; strong C++/Python, ROS 2, and hardware testing.
MoveIt, OMPL, MuJoCo, Gazebo, Isaac, Bullet/PyBullet, ROS 2, C++17/20, Python, Unix/Linux
1w
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Software Engineer - Early Career
Camden or Moorestown
OnsiteFull Time
2+ YOEMaster’s Degree in Computer Science or equivalent; minimum 2 years C++ software development; OO C++; experience with automated testing; US citizen; government security clearance; facility with special access.
C++, Object-Oriented Programming, UML, Linux, Python, Git, JIRA, Confluence, Static Code Analysis, CI/CD
2mo
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Senior Quality Software Engineer
Denver or Philadelphia or Cedar Rapids
$95k-$120k/yr HybridFull Time
3+ YOE3 years in software quality engineering; automated and manual testing; distributed apps; CI/CD; .NET/C# or Java/Spring; cloud and microservices experience.
Selenium, Cypress, Playwright, Postman, REST-assured, NUnit, JUnit, Cucumber, SpecFlow, Meter, Dynatrace, AppDynamics, Splunk, Git, Jenkins, Azure DevOps, Docker, Kubernetes, OpenShift, AWS, Azure, ARM Templates, Angular, React, Vue.js, ASP.NET MVC, HTML, JavaScript, CSS
1w
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Autonomy & Flight Controls Engineer
Coatesville, Pennsylvania, United States
HybridFull Time
10+ YOE10+ years UAV flight controls design; 7+ years adaptive controls; 5+ years autonomy design; MATLAB/Simulink; software development; FAA Part 107 pilot certification; X-Plane testing experience.
MATLAB, Simulink
6d
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Drexel Co-Op: Software Engineer (Java)
Philadelphia, Pennsylvania, United States
RemoteTemporary
Entry-level software engineer coop; learning mindset; experience with Java/Python/AWS; good communication; SDLC knowledge; automated testing a plus.
Java, Python, AWS, Appium, Cucumber, Angular, Spring Boot, SQL, JUnit
HiringCafe market data
Development Testing Engineer Jobs market signals in Middletown, DE, US
These signals come from live HiringCafe job inventory, not a static article. Use them to compare the market, then open listings above to apply directly.
Open jobs
100+
Hiring companies
58
Fresh sample
56% new in 30d
Salary visibility
53% show pay
Companies appearing in this market
JPMorgan ChaseLockheed MartinCACIT-MobileTrinseoAscensusCaterpillarComcast
Work location mix in visible results
Onsite: 51Hybrid: 10Remote: 7