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Senior Stack Tester Jobs in Washington (NOW HIRING)

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

System One

Senior Full Stack Developer

Mclean, VA · Remote

Senior Full Stack Developer Remote We are seeking a Senior Full Stack Developer to support a ... Designing, developing, testing, and deploying full-stack applications in an AWS cloud environment ...

CoStar

Senior Penetration Tester

Arlington, VA

Senior Penetration Tester Overview CoStar Group is a leading global provider of commercial and ... Experience testing modern applications in cloud-native tech stacks. Experience with mobile ...

CoStar Group

Senior Penetration Tester

Arlington, VA · On-site

Senior Penetration Tester Overview CoStar Group is a leading global provider of commercial and ... Experience testing modern applications in cloud-native tech stacks. * Experience with mobile ...

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Senior Stack Tester information

What are the key skills and qualifications needed to thrive as a Senior Stack Tester, and why are they important?

To thrive as a Senior Stack Tester, you need deep knowledge of software testing methodologies, quality assurance processes, and solid experience with full-stack application architectures. Familiarity with test automation tools (like Selenium or JUnit), CI/CD systems, and scripting languages is typically required, along with relevant certifications such as ISTQB. Strong problem-solving skills, attention to detail, and effective communication help you collaborate across development teams and catch subtle defects. These competencies ensure robust, scalable, and reliable software releases in complex enterprise environments.

What are Senior Stack Testers?

Senior Stack Testers are experienced professionals responsible for conducting tests and inspections on emission sources, such as industrial stacks, to ensure compliance with environmental regulations. They use specialized equipment to collect and analyze samples of gases, particulates, and other pollutants released into the atmosphere. Senior Stack Testers typically lead testing teams, oversee safety protocols, interpret test results, and generate detailed reports for regulatory agencies. This role requires strong technical knowledge, attention to detail, and familiarity with environmental standards like the EPA’s Method 5.

What are some common challenges faced by Senior Stack Testers when working with complex, multi-layered applications?

Senior Stack Testers often encounter challenges such as ensuring end-to-end test coverage across both front-end and back-end systems, managing rapidly evolving tech stacks, and troubleshooting elusive integration issues. Coordinating with development, DevOps, and product teams to address dependencies and maintain test environments can also be demanding. Staying up to date with the latest testing tools and frameworks is essential for maintaining efficiency and accuracy in such a dynamic role.

What is the difference between Senior Stack Tester vs Stack Tester?

AspectSenior Stack TesterStack Tester
CertificationsISTQB, ISTQB Advanced, or equivalentEntry-level certifications or none
Experience5+ years in testing, leadership roles1-3 years, focused on basic testing
Work EnvironmentLarge teams, complex projects, leadership responsibilitiesSmaller teams, focused on executing test cases
ResponsibilitiesDesigning test strategies, mentoring, complex issue resolutionExecuting test cases, reporting bugs

The main difference between a Senior Stack Tester and a Stack Tester lies in experience, certifications, and responsibilities. Senior Stack Testers typically have more advanced skills, leadership duties, and work on complex projects, whereas Stack Testers focus on executing tests and reporting issues. Both roles are essential in the testing lifecycle, but the senior position requires more expertise and oversight.

What are the most commonly searched types of Stack Tester jobs in Washington? The most popular types of Stack Tester jobs in Washington are:
What are popular job titles related to Senior Stack Tester jobs in Washington? For Senior Stack Tester jobs in Washington, the most frequently searched job titles are:
What job categories do people searching Senior Stack Tester jobs in Washington look for? The top searched job categories for Senior Stack Tester jobs in Washington are:
What cities in Washington are hiring for Senior Stack Tester jobs? Cities in Washington with the most Senior Stack Tester job openings:
Senior Stack Tester jobs near you
Infographic showing various Senior Stack Tester job openings in Washington as of July 2026, with employment types broken down into 84% Full Time, 14% Part Time, and 2% Contract. Highlights an 87% Physical, 5% Hybrid, and 8% Remote job distribution.

SENIOR FULL STACK ENGINEER

BTree Solutions, Inc.

Mclean, VA • On-site

Contractor

Re-posted 8 days ago

Job description

Job Title: SENIOR FULL STACK ENGINEER
Location: Mclean,VA
Duration: 12+ Months
Visa: USC, GC, H1B and EAD
Contract Type: W2
The hiring manager is seeking two senior-level Full Stack Software Engineers to join a small, high-impact team responsible for an internal enterprise application called Vessel, which supports email template management within the Associate Experience Technology (AXT) organization. This application is already established and actively used, but it is described as a medium-to-large scale system with a growing backlog, limited engineering bandwidth, and a need for modernization, stability improvements, and new feature delivery.
The manager emphasized that the team is lean, currently consisting of two long-tenured senior developers, one junior developer who joined recently, and the manager, so they need contractors who can come in and contribute quickly with minimal ramp-up time. These hires are expected to immediately help reduce backlog, improve testing coverage, enhance existing functionality, and strengthen overall platform reliability.
Core Technical Skill Set Required
This is a true full stack JavaScript role, with work split approximately 50% frontend / 50% backend, depending on feature priorities.
Frontend Requirements:
  • Strong hands-on experience with React
  • Strong experience with Redux
  • Ability to work in existing enterprise UI codebases
  • Experience building maintainable and scalable front-end components

Backend Requirements:
  • Strong experience with Node.js
  • Experience building and supporting backend services/APIs
  • Familiarity with AWS cloud-based backend services

Cloud / Infrastructure:
  • AWS Lambda
  • AWS ECS
  • Experience supporting production cloud applications

Database:
  • Strong relational database experience
  • PostgreSQL preferred

Testing / Quality Engineering (Very Important):
The manager repeatedly highlighted testing needs. Candidates must have strong automated testing experience.
Required frameworks include:
Backend/API Testing
  • Mocha
  • Jest

Frontend/UI Testing
  • Playwright
  • Vitest

The team specifically needs help increasing test coverage across the application.

Apply