QA Analyst - Backend & API Testing for HVAC Software

Multistack, LLC; Galesville (MD); On-site; USD 60,000 - 85,000; Full time

Benefits offered by this job

Professional development

Collaborative environment

Growth opportunities

Job summary

Multistack, LLC in Maryland is seeking a software QA tester to ensure quality, reliability, and usability of internal and customer-facing applications. You will collaborate with developers and product stakeholders throughout the SDLC to validate new features and support dependable releases.

The role focuses on testing a C#/.NET backend with Next.js/React frontend, APIs, and data validation using SQL. You will create and execute test cases, document defects, and contribute to regression coverage

Qualifications

• 1–3 years of professional software QA, testing, or related technical experience.
• Experience creating and executing software test cases.
• Strong troubleshooting, problem-solving, and defect documentation skills.
• Experience with SQL and relational databases.
• Experience testing APIs; GraphQL experience is a plus.
• Familiarity with modern web applications, React, and C#/.NET.
• Familiarity with Git, CI/CD, and bug/work-item tracking tools such as Azure DevOps.
• Strong written and verbal communication skills.
• Ability to work independently and collaborate with a small development team.

Responsibilities

• Create and execute functional, integration, system, regression, and user acceptance tests.
• Test applications across C#/.NET, Next.js/React, GraphQL, and PostgreSQL.
• Identify, document, track, and verify software defects.
• Test APIs and validate application data using SQL.
• Work with developers and stakeholders to clarify requirements, acceptance criteria, and release risks.
• Maintain test plans and regression coverage for key workflows.
• Support release validation and contribute to QA processes, standards, and documentation.

Skills

Troubleshooting

Problem-solving

Written and verbal communication

Independent work

Team collaboration

Education

Bachelor’s degree in Computer Science, Information Systems, Software Engineering, or related field

Tools

SQL

PostgreSQL

GraphQL

Azure DevOps

Git

CI/CD

Documentation tools

Job description

Multistack, LLC in Maryland is seeking a software QA tester to ensure quality, reliability, and usability of internal and customer-facing applications. You will collaborate with developers and product stakeholders throughout the SDLC to validate new features and support dependable releases.

The role focuses on testing a C#/.NET backend with Next.js/React frontend, APIs, and data validation using SQL. You will create and execute test cases, document defects, and contribute to regression coverage