Esmail Saberi - Senior Load and Performance Tester

Q: Where is Esmail based?

Esmail is based in Düsseldorf, Germany .

Q: What languages does Esmail speak?

Esmail speaks the following languages: German (Elementary) .

Q: How many years of experience does Esmail have?

Esmail has at least 35 years of experience. During this time, Esmail has worked in at least 22 different roles and for 27 different companies . The average length of individual experience is 1 year and 2 months . Note that Esmail may not have shared all experience and actually has more experience.

Q: What is Esmail's latest experience?

Esmail's most recent position is Senior Load and Performance Tester at Deutsche Bahn (DB-Netz) .

Q: What companies has Esmail worked for in recent years?

In recent years, Esmail has worked for Deutsche Bahn (DB-Netz) , Baader Bank , ipoque GmbH – A Rohde & Schwarz Company , and Major bank in Vienna .

Q: Which industries is Esmail most experienced in?

Esmail is most experienced in industries like Banking and Finance , Information Technology , and Transportation . Esmail also has some experience in Education , Insurance , and Telecommunication .

Q: Which business areas is Esmail most experienced in?

Esmail is most experienced in business areas like Information Technology , Quality Assurance , and Project Management . Esmail also has some experience in Research and Development and Product Development .

Q: Which industries has Esmail worked in recently?

Esmail has recently worked in industries like Transportation , Banking and Finance , and Information Technology .

Q: Which business areas has Esmail worked in recently?

Esmail has recently worked in business areas like Quality Assurance and Information Technology .

Recommended expert

Düsseldorf, Germany

Experience

Feb 2022 - Dec 2025

3 years 11 months

Senior Load and Performance Tester

Deutsche Bahn (DB-Netz)

Design, development, and execution of load and performance tests for the PRISMA project
Use of Apache JMeter, Gatling, Apache ActiveMQ, JMS/Tibco EMS, SikuliX, Jython, Amazon AWS, PAN-Client
Methods: load testing, test automation

Oct 2021 - Dec 2021

3 months

Senior Tester

Baader Bank

Design, development, and execution of load and performance tests
Dynamic generation of test data (FIX messages) during load tests using JMeter
Use of JMeter, Robot Framework, Python, Ubuntu, IBM MQ, Git
Methods: load testing, test automation, sending and receiving FIX messages to IBM MQ

Jun 2021 - Oct 2021

5 months

Senior Tester

ipoque GmbH – A Rohde & Schwarz Company

Development and execution of automated tests, including load and performance tests
Reviewing user stories and adding requirements to make software testable
Use of JMeter, Selenium, Robot Framework, Python, Jira, Confluence, Ubuntu, Git, GitLab, CI/CD, Docker, Kafka
Methods: load testing, test automation, Scrum

Mar 2020 - Mar 2021

1 year 1 month

Senior Tester

Major bank in Vienna

Analyzing project requirements for regular load and performance tests, as well as unit tests
Creating a project-related test concept
Designing and developing functional and load tests
Executing load and performance tests with JMeter and unit tests with Selenium (Python)
Test automation and final documentation
Use of JMeter, Selenium, JavaScript, Java, Python, Jenkins
Methods: load testing, test automation, Scrum

Jul 2019 - Nov 2019

5 months

Senior Load Tester

Public sector (Hanover)

Setting up a digital administration for Lower Saxony
Creating load test concepts and proofs of concept
Executing load tests
Automating tests for microservices and REST interfaces
Developing a test framework for automating tests of microservices and REST interfaces
Use of JMeter, SoapUI, JavaScript, BeanShell, Java, Selenium
Methods: load testing, test automation, Scrum

Oct 2018 - Jan 2019

4 months

Test Automation Developer

Dataport Altenholz

Testing and test automation of REST interfaces
Developing a test framework using SoapUI to automate REST interfaces
Using SoapUI, Swagger, Git, Jenkins, Groovy
Methods: Test automation, Scrum

Apr 2018 - Aug 2018

5 months

Tester

CTS EVENTIM AG

Testing REST interfaces
Developing a test framework for automating REST APIs
Developing a test framework using Selenium for end-to-end and UI tests
Using Jmeter, JavaScript, BeanShell, Java, SpecFlow, SoapUI, Selenium, Postman, TeamCity, Swagger, Magento
Methods: Test automation, Scrum

Jul 2017 - Dec 2017

6 months

Senior Load Tester

Federal Public Service (Nuremberg)

Creating load test concepts and proofs of concept
Performing load tests at the application/frontend level
Developing a test framework for test automation of microservices/REST APIs
Using Jmeter, JavaScript, BeanShell, Java, Git
Methods: Load testing, test automation, Scrum

Apr 2017 - May 2017

2 months

Test Automation Consultant

SyroCon Consulting GmbH

Designing and supporting the project team in developing test automation for developer-level test cases, especially for newly developed microservices
Using Selenium, Jmeter, SoapUI, JavaScript, BeanShell, Java, Git, Jenkins
Methods: Test automation, Scrum

Mar 2017 - Apr 2017

2 months

Test Design and Automation

Zurich Insurance

Creating a comprehensive test concept including test automation for a Digital Interface
Extending Jmeter as a new test framework to enable fully automated tests for all users without Jmeter knowledge
Using Java, JSON, XML, Excel/CSV, Smalltalk, REST-API, API-Management
Methods: Test automation

Aug 2016 - Dec 2016

5 months

Test Automation Engineer

VHV-Versicherungen

Design and development of automated integration tests using Jmeter for a microservice-based web application
Integration of the tests into Jenkins for continuous integration
Development of UI tests using Selenium
Design and execution of load and performance tests using Jmeter
Use of Selenium, Jmeter, JavaScript, BeanShell, Java, Jenkins
Methods: Load and performance testing, test automation, Scrum

May 2016 - Jun 2016

2 months

Load and Performance Test Specialist

German major bank in Frankfurt

Analysis of project requirements for regular load and performance tests and creation of a project-specific concept
Creation of synthetic test data with JSON
Creation of LPT scripts for service calls and responses
Execution of load and performance tests and evaluation of results
Final documentation
Use of Selenium, Jmeter, JavaScript, BeanShell, Java, JSON
Methods: Load and performance testing, test automation

Feb 2016 - Mar 2016

2 months

Load and Performance Test Specialist

Large IT service provider in Dortmund / e-commerce provider in Freiburg

Design and development of a test framework for load and performance tests to replicate and analyze the root causes of performance issues
Support in interpreting and identifying causes of performance issues
Advising developers on fixing performance issues
Use of Linux, Jmeter, JavaScript, BeanShell, Java
Methods: Load and performance testing, system monitoring

Jul 2015 - Dec 2015

6 months

Load and Performance Test Specialist

Large insurance company in Munich

Design and execution of load and performance tests for a web-based agency system during a data migration (AIX environment)
Aligning requirements with the business, test, and migration teams
Test execution and result documentation
Support in interpreting and narrowing down performance bottlenecks (isolation testing)
Advising developers on bug fixes
Use of AIX, Selenium, Jmeter, Dynatrace, JavaScript, BeanShell, Java, Jira
Methods: Load and performance testing

Dec 2014 - Apr 2015

5 months

Load and Performance Test Specialist

Reinsurer in Hanover

Design and execution of load and performance tests
Set up of a test environment as a VM in an ESX environment
Isolation tests to narrow down performance bottlenecks
Advising developers on bug fixes
Stability and functional tests as well as test automation
Use of Selenium, Jmeter, JavaScript, BeanShell, VM, Tomcat, JBoss, Java, Maven, Jira, MS Windows, Ubuntu Linux
Methods: Load and performance testing, functional testing, test automation

May 2014 - Nov 2014

7 months

Senior Consultant, Test Specialist

Various Small Projects

Conducted various load testing projects and application monitoring
Adapted existing test frameworks to new application releases
Automated GUI testing
Expanded end-to-end application monitoring scripts with new requests
Used JMeter, AutoIt, VBScript, Java, C#, .NET, Windows, Linux
Methods: Load and performance testing, test automation, end-to-end application monitoring, GUI automation

Sep 2013 - Apr 2014

8 months

Test Specialist for Load and Performance Testing

T-Systems International GmbH

Designed and developed a custom test framework for load and performance tests
Automated testing and GUI/surface automation
Used Silk Performer, LoadRunner, Ranorex, HP QTP, AutoIt, VBScript, SQL, MS Windows, VMware
Methods: Load and performance testing, business and functional testing, test automation, GUI/surface automation

Nov 2012 - Aug 2013

10 months

Senior Consultant / Developer, Test Specialist for Load and Performance Testing

Major Bank in Utrecht

Conducted various load testing projects for web applications (online banking)
Performed application monitoring and automated testing of web interfaces (online banking)
Functional and load performance testing
Used Selenium (WebDriver, RC, GRID, IDE), MS Windows, Linux, JMeter, AutoIt, VBScript, Java, C#
Methods: Load and performance testing, functional testing, test automation, end-to-end application monitoring

Jul 2012 - Sep 2012

3 months

Senior Consultant, Project Manager, External Software Developer

Swiss Major Bank in St. Gallen

Developed a test data loading system to generate bulk data based on statistical guidelines
Developed a 24x7 monitoring system with alert functionality for a web application
Performed load and performance testing
Used AutoIt, Java, XML, Excel
Methods: Test automation, test data visualization

Jun 2012 - Jun 2012

1 month

External Software Developer for Test Automation

Logistics Company in NRW

Developed application monitoring for two communicating software systems (ORTEC and GreenCat)
Performed performance analysis and statistical evaluation of logged response times
Conducted root cause analysis and provided evidence for damage claims
Used AutoIt, Java, JavaScript, Excel, SQL, XML
Methods: Functional testing, test automation, end-to-end application monitoring

Apr 2012 - May 2012

2 months

Load and Performance Test Specialist

German major bank in Frankfurt

Load and performance tests by correcting, adapting, and extending existing JMeter scripts for a new software release
Defect management
Use of JMeter, Java, JUnit, JavaScript, Beanshell
Methods: load and performance testing, functional testing, test automation, capture-replay

Mar 2000 - Dec 2011

11 years 10 months

Lead Performance Analyst and Automation Specialist

European data center of an American major bank

Setting up and leading a load and performance team in the EMEA region
Load and performance testing and software quality assurance
Design and development of end-to-end monitoring solutions for critical web applications
Automation of processes in Microsoft Windows environments
Analysis and development of software solutions for complex IT issues
Development of validation and remediation tools for the audit department to review and adjust system settings
Use of MS Windows, SilkPerformer, Excel, XML, SOA, IIS 5-7, WebLogic, UNIX, SQL, Perl, Oracle, PHP, Python, Delphi, LoadRunner, JavaScript, VBScript, .NET, C, C++, Java
Methods: load and performance testing, business and functional testing, test data automation, test automation, end-to-end application monitoring

Nov 1998 - Feb 2000

1 year 4 months

Senior Consultant, Load and Performance Test Specialist

American IT service provider in Neuss

Various load testing projects for banks and insurance companies
Consulting on SilkPerformer in Germany
Design of load tests, test execution, documentation, defect logging and tracking
Use of SilkPerformer, SilkTest, JavaScript, C, web UI automation
Methods: load and performance testing, functional testing, test data automation, test automation

Jan 1998 - Oct 1998

10 months

External Project Manager / Software Developer

Dresdner Bank

Automation of system-level maintenance tasks using Java/shell scripts
Problem analysis and solution design, method consulting
Use of AIX/UNIX, Java, shell scripts
Methods: automation, programming

Apr 1997 - Dec 1997

9 months

External Project Manager / Software Developer

Automotive industry in Rüsselsheim

Process automation and interface programming
Development of a JavaBeans application for online retrieval of information leaflets for chemicals and car paints
System design
Use of MS Windows, JavaBeans
Methods: process automation, programming, interface programming

Apr 1996 - Mar 1997

1 year

External Project Test Staff

IT industry in Mannheim

Load tests and comparative measurements of various IBM mainframes according to DIN 66273/ISO 9126
Automatic generation and visualization of test data
Designing load tests, execution and documentation
Performance analysis
Use of IBM MVS, UNIX, MS Windows, custom load simulator and evaluation program, C, Excel
Methods: programming, test automation, automatic generation of test data, test data visualization

Oct 1994 - Mar 1996

1 year 6 months

Test Specialist for Load and Performance Tests

Telecommunications in Hamburg

Load tests and comparative measurements of PCs from different manufacturers according to DIN 66273
Automatic generation and visualization of test data
Designing load tests, execution, documentation
Performance analysis
Use of MS Windows, custom load simulator and evaluation program, C, Excel
Methods: programming, test automation, test data visualization

Jan 1991 - Sep 1994

3 years 9 months

Research Associate / Project Manager

University of Kassel / Industry

Development of a load test system according to DIN 66273 for measuring and evaluating computer systems
Problem analysis, feasibility study, development of a load simulator and evaluation program
Comparison of performance of Siemens BS2000, IBM MVS and UNIX
Use of BS2000, MVS, UNIX (Sun OS, AIX), SIMUS, TPNS, custom load simulator, statistics
Methods: programming, test automation, test data visualization

Jan 1990 - Dec 1990

1 year

Research Associate / Project Manager / Software Developer

University of Kassel / Industry

Development and programming of an interface between Apollo workstation and BS2000 computer for use as a graphical terminal
Use of UNIX (Sun OS), BS2000, CGI, shell scripts, C
Methods: programming, interface programming

Apr 1987 - Dec 1989

2 years 9 months

Research Associate / Project Staff / Software Developer

University of Kassel / Industry

Porting of Kyoto Common Lisp (KCL) from UNIX to BS2000
Adaptation of the original software for BS2000, feasibility study
Use of BS2000, Common Lisp, UNIX, C, assembler
Methods: programming, interface programming

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Banking and Finance, Information Technology, Transportation, Education, Insurance, and Telecommunication.

Banking and Finance

Information Technology

Transportation

Education

Insurance

Telecommunication

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Quality Assurance, Project Management, Research and Development, and Product Development.

Information Technology

Quality Assurance

Project Management

Research and Development

Product Development

Skills

Focus Areas

Software Quality Assurance
Load And Performance Testing
Analyzing And Solving Complex It Problems
Automation Of It Processes, Like Automatic Checks Of Systems/applications For Their Current Settings And Any Differences From Relevant Policies, And Automatic Correction Of Found Differences
End-to-end Monitoring Of Critical (Web) Applications
Software Solutions In All Procedural, Functional, Logical, And Object-oriented Programming Languages, As Well As Scripting Languages Like Vbs, Js, Ws, And Autoit, Etc.

Operating Systems

Windows, Unix/unix Derivatives Like Ubuntu, Linux Mint, Macos, Bs2000, Ibm Mainframes "Z/os", Etc.

Software / Tools

Jmeter, Gatling, Hp Loadrunner, Silkperformer, Custom-built Load Testing Tools, Hp Quality Center, Silkcentral, Autoit, Selenium-java, Selenium-python, Soapui, Ranorex, Ms Office, Excel, .Net, Intellij Idea, Eclipse, Pycharm, Git, Gitlab, Jenkins, Teamcity, Jira, Confluence, Amazon Aws, Pan-client

Programming Languages

C, C++, C#, Java, Python, Groovy, Scala, Javascript, Typescript, Visual Basic, Vba, Vbscript, Autoit, Pascal, Delphi, Borland Bdl, Batch, Perl, Wsh, Vb, Xml, Html, Cobol, Fortran

Databases

Ms Sql, Oracle

Methods / Processes

Working On Different Project Types: Waterfall Model, Agile Software Development (Scrum), Load Testing/benchmark Tests According To Din 66273

Others

Ooa/ood, Ci/cd, Amazon Web Services (Aws), Ibm Cloud, Uml, Regular Expressions, Tcp/ip, Kafka, Ibm-mq, Apache Activemq

Languages

German

Elementary

Education

University of Kaiserslautern

Diploma in Computer Science, minor in Mathematics · Computer Science · Kaiserslautern, Germany · 1.8

Statistics

Experience

Total positions 30

Experience in Banking and Finance 16 y

Avg length 1 y 2 m

Longest experience 11 y 9 m

Expertise

Recent roles Senior Load and Performance Tester, Senior Tester, Senior Load Tester

Main industries Banking and Finance, Information Technology, Transportation

Main business areas Information Technology, Quality Assurance, Project Management

Qualifications

Highest degree Master

Profile

Created

August 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Esmail based?

Esmail is based in Düsseldorf, Germany.

What languages does Esmail speak?

Esmail speaks the following languages: German (Elementary).

How many years of experience does Esmail have?

Esmail has at least 35 years of experience. During this time, Esmail has worked in at least 22 different roles and for 27 different companies. The average length of individual experience is 1 year and 2 months. Note that Esmail may not have shared all experience and actually has more experience.

What roles would Esmail be best suited for?

Based on recent experience, Esmail would be well-suited for roles such as: Senior Load and Performance Tester, Senior Tester, Senior Load Tester.

What is Esmail's latest experience?

Esmail's most recent position is Senior Load and Performance Tester at Deutsche Bahn (DB-Netz).

What companies has Esmail worked for in recent years?

In recent years, Esmail has worked for Deutsche Bahn (DB-Netz), Baader Bank, ipoque GmbH – A Rohde & Schwarz Company, and Major bank in Vienna.

Which industries is Esmail most experienced in?

Esmail is most experienced in industries like Banking and Finance, Information Technology, and Transportation. Esmail also has some experience in Education, Insurance, and Telecommunication.

Which business areas is Esmail most experienced in?

Esmail is most experienced in business areas like Information Technology, Quality Assurance, and Project Management. Esmail also has some experience in Research and Development and Product Development.

Which industries has Esmail worked in recently?

Esmail has recently worked in industries like Transportation, Banking and Finance, and Information Technology.

Which business areas has Esmail worked in recently?

Esmail has recently worked in business areas like Quality Assurance and Information Technology.

What is Esmail's education?

Esmail holds a Master in Computer Science from University of Kaiserslautern.

What is the availability of Esmail?

Esmail is immediately available for suitable projects.

What is the rate of Esmail?

Esmail's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.