QA Automation Engineer with Network Testing (Python/Linux) experience

About the role

As a QA Automation Engineer with Network Testing (Python/Linux) experience, you will make an impact by ensuring the quality, stability, performance, and reliability of real-time, low-latency enterprise systems. You will be a valued member of the Quality Engineering team and work collaboratively with development teams, infrastructure teams, product stakeholders, and global delivery partners to support successful testing, validation, and production readiness initiatives.

In this role, you will:

• Coordinate with internal and external stakeholders to plan, execute, and deliver testing activities and release validations.
• Perform end-to-end system qualification from data center distribution through client desktop environments.
• Execute performance, benchmarking, soak, and real-time data testing to validate throughput, latency, stability, and scalability.
• Analyze application, system, and network behavior under load, including CPU, memory, packet loss, latency, and jitter metrics.
• Develop and maintain automated test frameworks, scripts, and tooling using Python, Bash, and AI-assisted development technologies.
• Validate migration scenarios, backward compatibility requirements, and production deployment readiness.
• Troubleshoot issues across application, operating system, infrastructure, and network layers using diagnostic and monitoring tools.
• Support global testing cycles and maintain lab environments that accurately mirror client production environments.

Work model

We believe hybrid work is the way forward as we strive to provide flexibility wherever possible. Based on this role’s business requirements, this is a hybrid position requiring 3 days per week in the client or Cognizant office in Creve Coeur, Missouri. Regardless of your working arrangement, we are here to support a healthy work-life balance through our various wellbeing programs.

The working arrangements for this role are accurate as of the date of posting. This may change based on the project you're engaged in, as well as business and client requirements. Rest assured; we will always be clear about role expectations.

What you need to have to be considered

• Bachelor's degree or higher in Computer Science, Software Engineering, or a related technical discipline.
• 5+ years of experience in Quality Assurance, including manual, automation, performance, and system testing.
• Strong experience testing real-time, low-latency, or high-volume distributed systems.
• Hands-on expertise with performance testing, benchmarking, soak testing, throughput validation, and latency analysis.
• Strong Linux administration skills, including system configuration, monitoring, troubleshooting, and performance tuning.
• Proficiency in Python and Bash scripting for automation, testing, and data analysis.
• Experience with network protocols and diagnostics, including TCP/IP, UDP, multicast, routing, tcpdump, and Wireshark.
• Proven ability to analyze logs, system metrics, and application behavior to identify and resolve complex issues.

These will help you stand out

• Experience working with large-scale streaming data environments processing hundreds of thousands of events or more.
• Knowledge of Windows system administration, client validation, and enterprise integration practices.
• Experience using AI-assisted development tools such as GitHub Copilot, ChatGPT, and Claude to accelerate testing and automation activities.
• Experience leveraging AI or machine learning techniques for anomaly detection, performance analysis, and root-cause investigation.
• Understanding of prompt engineering and AI-driven workflow optimization for quality engineering teams.
• Experience creating Technical Operations Notices (TON) and Notes for the Record (NFR).
• Familiarity with enterprise monitoring, observability, and testing platforms.
• Experience supporting global release management and rollout testing initiatives.

We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role.

Salary and Other Compensation:

The annual salary for this position is between $53,477 to 92,500 depending on experience and other qualifications of the successful candidate.

This position is also eligible for Cognizant’s discretionary annual incentive program, based on performance and subject to the terms of Cognizant’s applicable plans.

Benefits: Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:

Medical/Dental/Vision/Life Insurance

Paid holidays plus Paid Time Off

401(k) plan and contributions

Long-term/Short-term Disability

Paid Parental Leave

Employee Stock Purchase Plan

Disclaimer: The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.

Cognizant will only consider applicants for this position who are legally authorized to work in the United States without company sponsorship.

*Please note, this role is not able to offer visa transfer or sponsorship now or in the future*

Sobre a Cognizant
Cognizant (NASDAQ: CTSH) é uma construtora de IA e fornecedora de serviços de tecnologia, criando a ponte entre o investimento em IA e o valor para as empresas por meio do desenvolvimento de soluções de IA completas para nossos clientes. Nossa profunda experiência em setores, processos e engenharia nos permite incorporar o contexto único de cada organização em sistemas tecnológicos que potencializam a capacidade humana, geram resultados tangíveis e mantêm empresas globais à frente em um mundo em rápida transformação. Saiba mais em cognizant.ai ou @cognizant.

A Cognizant é uma empregadora que investe em equidade. Sua candidatura não será pautada em raça, cor, gênero, sexualidade, credo, origem, deficiência, gravidez ou qualquer outra característica protegida pelas leis brasileiras.

Informações adicionais de emprego 
Os candidatos podem ser obrigados a comparecer a entrevistas presenciais ou por videoconferência. Além disso, os candidatos podem ser obrigados a apresentar seu documento de identificação emitido pelo estado ou governo atual durante cada entrevista. 

Embora nosso sistema permita a candidatura em todos os idiomas, o(s) idioma(s) e o(s) nível(is) de proficiência exigidos para o trabalho variam. No entanto, é necessário um nível básico de inglês para fins de comunicação em toda a empresa. 

A Cognizant é uma empregadora que investe em equidade. Sua candidatura não será pautada em raça, cor, gênero, sexualidade, credo, origem, deficiência, gravidez ou qualquer outra característica protegida pelas leis brasileiras.

Se você tem uma deficiência que requer adaptações razoáveis para procurar uma vaga de emprego ou enviar uma candidatura, envie um e-mail para [email protected] com sua solicitação e informações de contato.