Software can meet its written requirements and still fail its users. I provide senior-level manual testing that examines not only whether a feature works, but whether it works reliably, makes sense, and supports the real user journey.

With more than 20 years of QA experience, I have tested web, mobile, and desktop applications across SaaS, financial services, public transportation, CAD software, e-commerce, and regulated product environments. I can join an established team, take ownership of a defined test phase, or help introduce structure where testing has become reactive or inconsistent.

Contact me to discuss manual testing

What I can help with

Exploratory and functional testing

I investigate the product beyond the expected happy path, combining structured test coverage with the freedom to follow unexpected behavior, inconsistencies, and emerging risks.

Regression and release testing

I create risk-based regression coverage, verify critical workflows, and provide clear information about release readiness. The objective is not merely to execute a checklist, but to help the team understand what has been tested, what remains uncertain, and where the greatest risk lies.

Web, mobile, and desktop testing

My experience includes responsive web applications, native and cross-platform mobile apps, complex browser-based administration tools, and specialist desktop software.

API and integration testing

I test the behavior between systems as well as the visible interface, using tools such as Postman, browser developer tools, REST APIs, JSON, SQL, and application logs to investigate failures and isolate their causes.

Usability and user-journey testing

Quality is not limited to technical correctness. I identify confusing terminology, inconsistent workflows, unclear validation, accessibility concerns, and unnecessary friction that can prevent users from completing their goals.

Defect investigation and reporting

A useful defect report should help the team act. I document concise reproduction steps, evidence, environment details, severity, business impact, and relevant technical observations, while working directly with developers and product owners to resolve ambiguity quickly.

Relevant experience

• Lead testing responsibility for the launch of the Deutschlandticket within the NVV Mobil application
• Eight years of testing dental CAD software at exocad and Align Technology, including work in an FDA-regulated environment
• Long-term QA work on SaaS platforms, e-commerce systems, financial services, and public-transport applications
• Testing across web, iOS, Android, and Windows products
• Collaboration with distributed product, development, design, support, and business teams in both English and German

How I work

I begin by understanding the product, its users, the business-critical workflows, and the consequences of failure. From there, I establish coverage according to risk rather than treating every screen and requirement as equally important.

My work typically includes:

• reviewing requirements and acceptance criteria before testing begins;
• identifying gaps, ambiguity, and testability problems early;
• designing focused test charters, scenarios, and regression coverage;
• testing across relevant devices, browsers, roles, and data conditions;
• investigating failures below the user-interface level where necessary;
• communicating risks and results in language appropriate to the audience; and
• recommending candidates for automation when repetition and business value justify it.

Manual testing and automation belong together

Manual testing is not the opposite of automation. Automated checks are excellent at confirming known behavior repeatedly; skilled manual testing is better suited to discovery, judgment, usability, and rapidly changing functionality.

I can provide manual testing as a standalone service or combine it with test automation to create balanced coverage.

Need experienced manual QA support?

I am available for freelance projects, release support, targeted test phases, and ongoing QA engagements. I work remotely and can attend on-site sessions in Germany when required.

Contact me to discuss your project