Freelance Mobile QA (m,w,d)

Your mission

We are seeking a skilled and detail-oriented Mobile QA to safeguard the quality of our mobile applications across Android and iOS. In this role, you will play a key part in our development process, collaborating closely with our mobile engineering team to ensure the reliability, usability, and correctness of our apps on real devices — from everyday use to edge cases and failure conditions.

Please note: Candidates must be located in Europe to ensure effective collaboration within our time zones, and this position requires a minimum commitment of 30 hours per week, with the option to expand to full-time.

Key Responsibilities:

• Collaborate with the mobile development team and product manager to plan and execute weekly sprint activities.
• Participate in daily stand-ups and sprint planning meetings, contributing insights to enhance product quality.
• Perform comprehensive manual and exploratory QA testing of our Android and iOS applications across a range of devices, OS versions, and screen sizes.
• Identify, analyze, and troubleshoot issues to accurately distinguish between client-side and server-side problems.
• Manage and execute testing tasks efficiently within each sprint cycle, and contribute to release and app-store readiness checks.
• Proactively suggest improvements, raise new tickets, and contribute ideas to elevate overall product quality.

Your profile

• Proven experience in manual QA testing of mobile applications (Android and/or iOS).- Comfort with mobile QA tooling e.g. adb and network inspection tools.
• Excellent attention to detail, documentation, and communication skills.
• Collaborative mindset with the ability to work effectively in cross-functional teams.
• Availability to work between 9:30 AM and 4:00 PM CET on weekdays.
• A continuous learning attitude and commitment to process improvement.

Why us?

• Make a meaningful impact: Help improve people's lives by working in an area that truly matters—their mental fitness and brain health.

• Competitive compensation: Attractive salary and bonus package.

• Grow quickly: A steep learning curve with plenty of opportunities to take ownership and work independently.

• Learn from others: Join a supportive environment where colleagues actively share knowledge and learn from one another.

• Have a direct impact: Become an integral part of an experienced, motivated, and interdisciplinary Growth Team.

• Get expert coaching: Benefit from guidance and coaching from experienced colleagues.

About us

For 15 years, we have been developing digital training programs that are proven to enhance cognitive performance and are easily accessible to people worldwide. Today, our health app NeuroNation is available in 13 different languages and is used by over 30 million people. Our cognitive therapy program, NeuroNation MED, has been permanently approved as a digital health application by the Federal Institute for Drugs and Medical Devices and supports approximately one-quarter of all patients with mild cognitive impairment (ICD-10 F06.7) in Germany. Our long-term goal is to establish the first virtual clinic for cognitive and mental health.

Why You Should Join NeuroNation
We build science-backed brain-training and digital cognitive therapy that reaches millions of people. Your work here will shape how people care for their minds every day.

Impactful Work: Working with us means contributing to a product that profoundly impacts cognitive health. Our brain training programs, backed by cutting-edge neuroscience and cognitive psychology, are designed to enhance cognitive functions, improve working memory, and elevate our users' quality of life.

Inspiring Environment: At NeuroNation, you'll join a vibrant team of passionate and innovative professionals. We believe that collaboration and creativity thrive in a fun and inclusive environment. From team-building activities to spontaneous brainstorming sessions, we make sure that work is both productive and enjoyable.

Flexible hours: Our flexible working hours and remote work policy let you tailor your work schedule to fit your lifestyle, ensuring you can perform at your best.