Sebastian Chece
Load & Performance Testing - Test Automation
Experience
Public institution responsible for educational institutions in NRW
- Consulting on processes and execution of load tests, performance tests and technical tests of various applications: web portal, file cloud, email, video conferencing, learning/course platform
- Creating the load test framework
- Programming test scripts (JMeter, Selenium)
- Developing batches to support the evaluation
- Executing load tests and evaluating results, including clear reporting, recommendations for action, and bottleneck analysis
- Managing tasks and collaboration to achieve meaningful load test results
Otto GmbH & Co. KG
- Supporting agile teams with cross-browser testing using TestCafe and Sauce Labs in the Amazon Cloud (AWS)
- Integration into the CI/CD pipeline (CircleCI)
- Stabilizing test scenarios (flaky tests, test data issues)
- Implementing TestCafe cross-browser tests via Sauce Labs
Otto GmbH & Co. KG
- Consulting on processes and execution of load and performance tests for apps of a telecommunication system
- Focusing on the performance of essential web services and their apps
- Developing scenarios (incoming call, busy, callback, etc.)
- Documentation, evaluation, and management reporting
Otto GmbH & Co. KG
- Central test automation of various GUI applications (desktop clients and web clients) and backend APIs (SOAP, REST, SQL, JSON) using Micro Focus UFT
- Consulting on required test scenarios and test automation
- Implementing and providing central automated test components for keyword-driven testing
- Executing backend and frontend tests
Otto GmbH & Co. KG
- Consulting on processes and execution of load and performance tests and technical tests for the replacement of a legacy host system
- Focusing on backend web services performance (Java GlassFish Application Server)
- Technical integration and failover testing
- Setting up monitoring and automated evaluation as well as performance comparisons
- Oracle ASH data monitoring and evaluation
- Analysis and profiling with AppDynamics
- Documentation and test case creation/refactoring of technical tests
- Analysis and presentation of results (MS Excel, Splunk)
BITMARCK Software GmbH
- Design and coding of new load test scenarios and scripts (Micro Focus Borland Silk Performer, Java/Groovy, Citrix Scripting)
- Test case creation and refactoring of existing test scripts
- Support in setting up load test environments, installing load testing software and configuring load generators
- Requirements analysis, planning and control of load tests
- Documentation, evaluation and interpretation of results
- Monitoring of hardware resources (JBoss Application Server) and database (IBM DB2) as well as application KPIs
- Load testing via Citrix client (Java-Swing GUI) and Java API (headless), 7,000 virtual users
Crowdtesting Platforms (Applause, uTest, Testbirds)
- Conducting very short test tasks in parallel with client projects on various crowdtesting platforms
- Testing mobile devices (Android) and web applications
GfK Retail & Technology GmbH
- Consulting on processes and conducting load, performance and technical tests for various data-in and data-quality applications
- Focus on Oracle database (DWH) and MS Access databases
- Requirements analysis for new projects (changes)
- Programming of analysis scripts (PL/SQL, Windows Batch)
- Oracle ASH data monitoring and evaluation
- Documentation, analysis and presentation of results (MS Excel, BIRT)
- Testing MS Access to Oracle migration
- General consulting on test processes, methods and communication
- Test automation per project with Ranorex + custom framework
- Performance testing of Silverlight, web and desktop applications at various interface levels
GfK Retail & Technology GmbH
- Consulting on processes and conducting load, performance and technical tests for a complex Oracle data warehouse system (market research BI)
- Focus on Oracle database (DWH)
- Requirements analysis for new projects (changes)
- Programming of analysis scripts (PL/SQL, Perl)
- Oracle ASH data monitoring and evaluation
- Documentation, analysis and presentation of results (MS Excel, BIRT)
- General consulting on test processes, methods and communication
Deutsche Bank AG / Postbank AG
- Setting up load test environments
- Requirements analysis, planning and control of load tests
- Design, implementation and programming of scenarios and scripts (HP LoadRunner, NEOTYS NeoLoad, custom LPT tool)
- Documentation and consulting
- Execution of load tests
- Evaluation (SQL on raw data) and result analysis for 5,000 virtual users
brandmarken Hamburg / Agentur für Kommunikation GmbH
- Planning and management of load tests with Apache JMeter
- Designing scenarios and scripts
- Documentation and consulting
- Executing load tests
- Analysis and presentation of results
Deutsche Bank AG
- Setting up load test environments
- Requirements analysis, planning, and management
- Designing and programming scenarios and scripts (HP LoadRunner)
- Documentation and consulting
- Executing load tests for 2,000 virtual users
- Evaluation and analysis of results
T-Systems Enterprise Services GmbH / Bundesagentur für Arbeit
- Load test script development and refactoring (Micro Focus Borland SilkPerformer, Ruby)
- Executing load tests and evaluation
- Programming analysis scripts
- Setting up and maintaining new load test environments
- Extending load test scope to synthetic and production data simultaneously
- Test consulting, planning and coordination of load tests, effort estimation
- Managing database setup and importing anonymized production data
- Large project with about 60 people, IBM Informix database, 500–4,000 virtual users in testing, 40,000 in production
IBM/Bundeswehr Informatik (BWI Informationstechnik GmbH; BWI Systeme GmbH)
- Designing scenarios and scripts (IBM Rational Performance Tester)
- Load test design, execution, and monitoring
- Documentation and performance/utilization analysis
- Generating test data
- Consulting, evaluation, and providing recommendations
- Test monitoring and control for 1,000 virtual users
andagon GmbH
- Integration and system testing at T-Mobile Germany GmbH
- Evaluations for introducing test automation tools (Rational Functional Tester, HP QTP, IBM Rational Robot, Rational Performance Tester, HP LoadRunner)
- Defect classification, documentation, and management (HP Mercury Quality Center)
- Designing a new defect management process and coordinating on-site support
- Designing and creating training plans and delivering TÜV software tester certification training
- Onboarding and coaching new Test Automation Consultants
- Product design of a new test suite (AQUA) for requirements, test case, and business process management as well as test automation
Leopold Kostal GmbH & Co. KG
- Static analysis of C modules for deviations from MISRA-C and internal coding guidelines (QA system QAC)
- Development of an aid and guide for using the static analysis tool
- Coaching on MISRA-C coding guidelines and explanation of their benefits
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Information Technology (17 years), Government and Administration (7.5 years), Retail (6 years), Telecommunication (1 year), Professional Services (1 year), and Automotive (1 year).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Quality Assurance (19 years), Information Technology (14 years), Project Management (3 years), Business Intelligence (2.5 years), and Product Development (1 year).
Summary
In addition to my many years of experience in load and performance testing and test automation, I also consider social components such as teamwork, communication skills, confidence, and a structured, goal-oriented way of working as reasons for the success of my client projects.
Practical experience from a wide range of projects allows me to draw comparisons with other solutions. In addition, I have always moved from project to project in very different technologies, process/method and tool landscapes. I particularly enjoy taking on these challenges. My quick grasp, motivation, and analytical mind are of great benefit to me. I naturally enjoy solving complex tasks and successfully complete my projects.
Besides my project tasks, I am active as an author of a test automation blog and write articles for magazines. Please also take a look at the references to my projects (found in my project list).
Skills
Focus: Load And Performance Testing
Secondary Focus: Performance Engineering Throughout The Entire Software Life Cycle
Efficiency Testing, Load Testing, Stress Testing, Performance Testing, Failover Testing
Test Automation Of Any Kind
From Initial Planning / Requirements / Design All The Way To Test Completion And Retrospective. Including Development Of Analysis And Test Scripts, Environment Setup, Consulting, And More.
For Production Releases (Acceptance Tests), System Tests, Regression Tests As Well As Comparisons With The Next Software Release (Old Vs. New).
To Verify Requirements, Slas (Service Level Agreements), Nfrs (Non-functional Requirements) Or User Stories.
For Safe Production Releases And To Ensure Customer Satisfaction. Consistent Performance After Updates.
As Performance And Bottleneck Analysis To Identify Weaknesses And Bottlenecks, In Order To Derive Recommendations For Performance Or Hardware Optimization.
Aiming For The Best Possible, High-performing Software With Minimal Errors And Maximum Quality.
Familiar With Traditional Development Models (E.g., V-model, Waterfall) And Agile Methods (E.g., Scrum, Kanban), And Adaptable To Any Other Development Approach.
Cross-industry, Cross-interface And Cross-technology Expertise. This Includes Mobile Device Apps, Web Applications, Desktop Applications And Backend Test Automations In Various Projects With Different Solutions, Technologies, Tools, And Programming Languages.
Support And Consulting In Test Management And The Entire Field Of Software Testing, Quality Management And Quality Assurance.
General Test Automation And Software Testing, Including Test Case Programming In Any Testing Tools And Any Programming/scripting Languages.
Functional Testing Tools And Also With Respect To Ci/cd (Continuous Integration/continuous Delivery).
General Test Management And Testing Activities: Test Planning And Design, Estimation, Control, Monitoring, Analysis/evaluation, And Reporting.
Refactoring Test Scripts And Support In Selecting Test Methods.
Test Data Management: Planning Test Data And Generating Test Data.
Clear Presentation Of Test Results And Their Reporting.
Training And Coaching.
Tool Evaluation And Selection.
Support And Consulting In Team Coordination And Team Leadership.
Supporting Process Engineering, For Example Defect Management Processes.
Programming (Various High-level And Scripting Languages) Including Html, Html5, Php, Css, Javascript, Typescript, Python, Java, C, C++, C#, Xml, Perl, Windows Batch, Powershell, Linux Shell/awk/sed Scripting
Windows, Unix, Linux, Solaris, Eclipse, Git, Svn, Subversion, Cvs, Circleci, Jira, Confluence, Jenkins, Etc.
Databases Including Sql And Pl/sql Programming
Load And Performance Testing Tools: Apache Jmeter, Micro Focus Loadrunner (Hp Loadrunner, Mercury Loadrunner), Micro Focus Silkperformer, Hp Performance Center, Ibm Rational Performance Tester, Smartbear Loadui, Neotys Neoload
Functional Testing Tools: Playwright, Selenium, Micro Focus Uft One, Micro Focus Uft (Hp / Mercury Quicktest Pro - Hp Unified Functional Testing), Testcafe, Smartbear Soapui, Postman, Sauce Labs, Ibm Rational Functional Tester, Micro Focus Borland Silktest, Ranorex
Test Case Management, Requirements Management, Defect Management Tools: Jira, Confluence, Micro Focus Alm, Micro Focus Alm Quality Center, Hp Mercury Quality Center, Hp Alm, Microsoft Test Manager (Mtm), Microsoft Team Foundation Server (Tfs), Redmine, Microsoft Excel
Cross-industry Expertise In Financial Services, Banking, Telecommunications, Automotive Industry, Insurance (Statutory Health Insurance), Market Research, Information Technology & Services, Retail And Consumer Goods, And It Software Houses
Member Of Asqf - Working Group Software Quality And Training
Continuous Certifications, Specialist Group Meetings, And Conferences On Software Testing, Test Management, Test Data Management, And Testing In Agile Methods Such As Scrum
Trainer And Mentor At Teqs Consulting Gmbh With Regular Discussions About Test Projects, Best Practices, And Tools In Test Automation And Load And Performance Testing
Languages
Education
Diploma in Computer Science (University of Applied Sciences) · Technical Computer Science · Germany · Thesis: 1.0
Certifications & licenses
Istqb Ctpt - Certified Tester Performance Testing
Cmap - Certified Mobile App Professional
Istqb Agile Tester Extension Certified
Micro Focus Borland product range, especially Silk Performer
Cat Certified Agile Tester
Isaqb Cpsa - Certified Professional For Software Architecture
Ireb Cpre-certified Professional For Requirements Engineering
Istqb Ctal - Full Advanced Level
Istqb Ctal-Ta-certified Test Analyst
Istqb Ctal-Tm - Certified Test Manager
Istqb Ctal-Tta - Certified Technical Test Analyst
Itil V3 Certified
Istqb Ctfl-certified Tester - Foundation Level
Qa-Systems Qac
Profile
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