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Freelance Rest Api Testing Jobs in Virginia (NOW HIRING)

Computer World Services

Automation Tester

Springfield, VA · On-site

$110K - $115K/yr

Analyze functional and non-functional requirements to define API and backend testing needs. * Design and develop automated test scripts for REST, SOAP, and microservice interfaces. * Validate API ...

Ampcus Inc

Sr, Java Dev

Richmond, VA · On-site

$56 - $71.50/hr

... REST API's, lambda's using Java/spring boot. • Responsible for development, writing automated unit test cases, participating in end to end integration testing, performance testing and maintenance ...

ClifyX

Selenium Automation Tester - Herndon VA

Herndon, VA · On-site

$47.25 - $62.50/hr

Selenium, Rest-Assured, Selenide, Behave, Responsive Web Testing Tools like Applitools/Galen, Sauce ... Required : • Java • Selenium • API testing • Good Sr Automation tester with development ...

Tetra Tech

Software Developer

Vienna, VA · On-site

$90 - $130/hr

Develop RESTful web services using REST API * Develop staging and multiple level system and performance testing using Angular * Prepare the test documentation covering unit, system, integration, and ...

BTree Solutions, Inc.

SDET (JAVA)

Mclean, VA · On-site

Execute end-to-end (E2E), functional, and integration testing across frontend and backend systems * Experience automating both Web UIs and REST API endpoints * Experience with XML, XSD, WSDL, REST ...

ACI Infotech

Full-stack Developer

Reston, VA · On-site +1

REST API * Unit Testing i.e Mockito, Junit, Power Mockito * Familiarity with Testing Pyramid * Database Concepts (SQL, Joins, Normalization, Performance) * Exception Handling * Experience working XML ...

USM

JB061925 - QA Automation

Mclean, VA · On-site

Strong knowledge of API testing using Postman, REST Assured, or similar tools. Good understanding of SQL and database testing. Experience with Git/GitHub/GitLab. Knowledge of Jenkins or other CI/CD ...

Amiseq Inc.

ServiceNow Developer

Mclean, VA · On-site

$55.50 - $76.25/hr

Build system integrations using Integration Hub and REST API. * Execute functional component testing on GRC workflows. * Create technical solution documentation * As a member of the product team ...

TheStaffed

Sr Full Stack Developer

Mclean, VA · On-site

Proficiency with testing frameworks ( Cypress ) and REST API design; familiarity with AWS services * Bachelor's degree in Computer Science, Engineering, or equivalent professional experience

Ruri Software Technologies LLC

Tech Product Analyst

VA · On-site

... API contracts, error handling, and security requirements. • Collaborate with teams implementing REST services, GraphQL APIs, Kafka event streams, and third-party integrations. Testing & Release ...

TiltEdge Solutions LLC

ServiceNow Developer

Mclean, VA · On-site

$60/hr

Build system integrations using Integration Hub and REST API. * Execute functional component testing on GRC workflows. * Create technical solution documentation. * As a member of the product team ...

eSolutionsFirst, LLC

Software Developer

Mclean, VA · On-site

Net, Python, Java or similar), Unit testing, REST API design Hands-on experience with Claude Code, GitHub Copilot, or equivalent AI coding assistants in production development workflows AI & Tooling:

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Freelance Rest Api Testing information

What is the difference between Freelance Rest Api Testing vs API Test Engineer?

AspectFreelance Rest Api TestingAPI Test Engineer
CredentialsTypically no formal credentials required, but knowledge of APIs and testing tools is essentialUsually requires a degree in Computer Science or related field, certifications like ISTQB are common
Work EnvironmentIndependent, remote, project-basedFull-time or contract, often in an office or remote team setting
Employer & Industry UsageClients across various industries, freelance platformsTech companies, software development firms, QA teams
Search & Comparison IntentFreelance Rest Api Testing vs API Test Engineer

Freelance Rest Api Testing involves independent professionals performing API testing on a project basis, often remotely and for multiple clients. API Test Engineers are typically employed full-time within organizations, holding formal credentials and working within structured teams. Both roles focus on ensuring API quality but differ in work environment, credentials, and employment structure.

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Automation Tester

Computer World Services

Springfield, VA • On-site

$110K - $115K/yr

Full-time

Re-posted 19 days ago

Key responsibilities

  • Design, develop, and maintain automated test scripts and frameworks for REST, SOAP, and microservice interfaces.

  • Execute integration, regression, and performance testing of backend systems and verify API responses and data integrity.

  • Collaborate with development and DevOps teams to ensure system quality, troubleshoot issues, and support automation in CI/CD pipelines.

Job description

We are seeking an experienced Automation Tester with strong expertise in Backend, API, and Microservices testing. The ideal candidate will design, implement, and maintain automation frameworks supporting REST, SOAP, and distributed backend services. This role requires hands-on experience with API validation, database verification, and performance testing in Agile/DevOps environments.
 
The Automation Tester will design automated test scripts in support of user requirements for moderately complex to extremely complex software of IT systems. They will perform activities such as determining what technical testing strategy to implement; converting manual test cases to automated scripts, analyze test case scenarios, identifying validation points and metrics to be collected; ability to identify which protocol is best to use for building scripts and connecting to test environment interfaces; conducting various types of tests and collecting necessary metrics; writing test analysis documents highlighting key findings and recommendations; perform code reviews. The Automation Tester may make recommendations and advise on system improvements, optimization, or maintenance efforts to reduce operating time and improve efficiency.
 
The Automation Tester should have the following skills:
Experience in backend or API test automation
Strong knowledge of Agile, CI/CD, and DevOps practices
Experience with performance testing and systems engineering
Experience with JMeter and developing Curl or Shell scripts
Excellent communication and problem-solving skills
Ability to work independently and collaboratively in cross-functional teams
Ability to convey technical information to non-technical individuals
Key Tasks & Responsibilities
  • Analyze functional and non-functional requirements to define API and backend testing needs.
  • Design and develop automated test scripts for REST, SOAP, and microservice interfaces.
  • Validate API responses, payloads, and data integrity using Postman, Swagger, and SOAP UI.
  • Execute integration and regression testing for backend systems.
  • Build and maintain automation frameworks using Python, Java, or Groovy.
  • Verify backend data using SQL (Oracle, PostgreSQL, MySQL).
  • Troubleshoot API and data issues through log analysis and diagnostics tools.
  • Integrate automated tests into CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI).
  • Support load and performance testing using JMeter or similar tools.
  • Participate in code reviews and provide recommendations to improve automation coverage.
  • Collaborate with developers, DevOps, and QA teams to ensure system quality and reliability.
Required Education & Experience
  • Bachelor's Degree in Computer Science, Engineering, or related field and 10 years of experience
  • 8-10 years of experience in backend or API test automation
The ideal candidate should be able to demonstrate working knowledge with several of the following concepts or technologies:
Core Expertise
  • REST / SOAP API Testing
  • Backend & Microservices Testing
  • Postman, Swagger, SOAP UI
  • REST Assured, PyTest, Karate
  • JSON, XML, WSDL, OAuth, JWT
  • SQL (PostgreSQL, Oracle, MySQL)
  • Jenkins, Maven, Git, JIRA
  • TestNG, JUnit, PyTest
  • Cucumber
  • Docker / Kubernetes Environments
  • Performance Testing (JMeter, Locust)
  • Languages: Java, Ruby, Python, XML
 
Desired Expereince
  • AWS or other Cloud Platform experience
  • API Monitoring (e.g., Splunk, Kibana)
  • TDD / BDD experience
  • Security and authentication testing
  • Federal or large-scale enterprise system experience
Certification Requirements
  • Relevant certifications desired
Clearance Requirements
  • Candidate must be a US Citizen, possess DHS Suitability background investigation or be eligible to qualify for DHS Entry of Duty background investigation followed by DHS Public Trust Clearance
Other (Travel, Work Environment, DoD 8570 Requirements, Administrative Notes, etc.)
  • None at this time
$110,000 - $115,000 a year
The offered rate will be based on the selected candidate's knowledge, skills, abilities and/or experience and in consideration of internal parity. The posted range is appropriate for a typical candidate meeting, at a minimum, all the core requirements of the position
Computer World Services is committed to the full inclusion of all qualified individuals. As part of this commitment, Computer World Services will ensure that individuals with disabilities (IWD) are provided reasonable accommodations. If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact Human Resources at [email protected]
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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