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Solü Technology Partners · 3 weeks ago

Performance Test Engineer (.NET)

Wilmington, DE

Contract

Onsite

Senior Level

$200K/yr - $200K/yr

5+ years exp

Solu Technology Partners is focused on delivering high-performing, reliable, and scalable technology solutions through a large-scale digital transformation initiative. The Performance Test Engineer will design, execute, and embed performance testing strategies across web-based and client-server applications, collaborating closely with various teams to optimize application performance across the .NET technology stack.

Information TechnologySoftwareStaffing Agency

No H1B

Responsibilities

Design, develop, and execute performance, load, and stress tests using Apache JMeter and industry-standard methodologies

Analyze performance test results to identify system bottlenecks (CPU, memory, I/O, database, network) and recommend code, configuration, or infrastructure optimizations

Integrate performance testing into CI/CD pipelines using GitLab, including authoring and maintaining pipeline jobs, artifacts, and pass/fail thresholds

Validate application performance and stability under varying load conditions and peak usage scenarios for web and client-server applications

Collaborate with developers and architects to incorporate performance considerations such as capacity planning, caching strategies, and concurrency into system design and development

Partner with database engineers to tune queries, indexes, and connection strategies for .NET and SQL-based workloads

Create and maintain performance test plans, scenarios, scripts, and data models, including entry/exit criteria and service-level expectations

Document performance benchmarks, trends, and test outcomes, providing actionable insights for release readiness and capacity planning

Produce clear, detailed defect reports and performance recommendations with reproducible steps and supporting metrics

Leverage cloud platforms, particularly Azure, for test environments, scaling, and monitoring; collaborate on infrastructure-as-code initiatives when applicable

Use monitoring and log analysis tools (e.g., Splunk, ELK) to correlate performance data with system behavior and perform root-cause analysis

Work closely with DevOps teams to maintain performance test harnesses, datasets, synthetic users, and environment parity across development stages

Embed performance testing into Agile or SAFe workflows, contributing to sprint ceremonies, release planning, and continuous improvement initiatives

Recommend performance engineering tools, frameworks, and standards, and coach developers and QA teams on profiling and tuning best practices

Ensure compliance with internal controls, audit requirements, and regulatory standards when handling performance data and test artifacts

Qualification

Apache JMeterCI/CD with GitLab.NET technology stackMicrosoft SQL ServerMicrosoft AzurePerformance TestingWeb-based applicationsClient-server applicationsTechnical leadershipProblem-solvingCommunicationTime managementCross-functional collaborationTechnical mentorship

Required

Bachelor's degree with 5+ years of experience in performance testing or QA, or an equivalent combination of education and experience

Strong hands-on expertise with Apache JMeter, including test plan design, parameterization, correlation, distributed testing, and reporting

Experience integrating performance testing into CI/CD pipelines using GitLab (YAML), including test gating, artifact management, and .NET build integration

Working knowledge of the .NET technology stack (C#, ASP.NET, Entity Framework, SQL Server) with the ability to collaborate on code-level and configuration tuning

Experience testing both web-based and client-server applications across custom-developed and COTS solutions

Exposure to Microsoft Azure for environment provisioning, monitoring, and scaling (strong plus)

Financial Technology Systems: Familiarity with financial technology systems such as client management, core banking, payments, financial reporting, loan management, or fraud/AML solutions

Vendor Management: Experience working with COTS application vendors, IT vendors, and contract-based engagements

Strong soft skills including technical leadership, problem-solving, communication, time management, cross-functional collaboration, and technical mentorship

Preferred

DevOps toolchains and practices, including Git, GitLab, Artifactory, NuGet, NPM, NodeJS, Docker, Kubernetes, Azure DevOps, MSBuild, SonarQube, and scripting (YAML, PowerShell, Bash)

Familiarity with Jira and Confluence, and prior experience in institutional or enterprise financial services environments is a plus