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I will develop hardware software app iot mobile web developer
Marcin Walczyk
Vetted Pro
Top Rated
5.0
5.0
Vetted by Fiverr Pro
Marcin Walczyk was selected by the Fiverr Pro team for their expertise.
About this gig
At Inventively LLC, we build high-stakes, end-to-end apps for web, mobile, AI, and hardware. With 10+ years of expertise, we help entrepreneurs and organizations turn ideas into scalable, revenue-driving products.
Our projects typically range from $20k to $100k and run 1 to 5 months. We cover the full cycle: product workshops, UI/UX design, scalable architecture, development, and long-term support. Clients have achieved over $2,000,000 per year in in-app purchases under our guidance.
We are an official RevenueCat technology partner, a San Francisco company valued at $500M with $100M+ raised, powering over $8B in annual transactions. This gives our clients proven subscription monetization and growth strategies.
We specialize in profitable software businesses that last. Mobile and web apps, AI solutions, hardware integrations, payments and cloud systems, and reliable maintenance.
Kindly contact me: Contact seller -> Ask a question.
Get to know Marcin Walczyk
Marcin Walczyk
Vetted Pro
We build profitable software businesses: Marcin, CEO Inventively LLC
Top Rated
Marcin Walczyk is part of the Fiverr Pro catalog and has been hand-picked by a dedicated Fiverr Pro team for their skills and expertise.
Vetted for
Mobile App Development
Mobile App Maintenance
- FromUnited States
- Member sinceFeb 2019
- Avg. response time3 hours
- Last delivery3 weeks
Languages
English
Build scalable mobile, web, AI, and computer vision apps with a top-tier engineering team at your side. Leverage our expertise in development, design, payments, and marketing integrations.
As an official RevenueCat technology partner, a San Francisco-based startup that has raised over $100 million in funding, is valued at $500 million, and powers a platform processing over $8 billion annually, we're ready to help you achieve great success.
We build long-term partnerships with entrepreneurs who need a reliable tech team to deliver and maintain the software behind their growing business.
My Portfolio
FAQ
Can you sign in an NDA? ( Non-disclosure agreement )
Absolutely. We value confidentiality. I encourage NDAs and can use yours or provide our template. Rest assured, only essential team members access your data, ensuring your project's security and peace of mind.
By working with Inventively LLC will I get direct contact with Marcin?
Yes, by working with Inventively, you'll have direct contact with Marcin. His unique expertise in transforming app businesses into profitable entities ensures your project receives the best guidance. We take on a limited number of projects, ensuring you get the dedicated focus you deserve.
What kind of access and control will I have over my project during development?
As our client, you will have real-time access to project progress, budget management, and goal status, ensuring full transparency and control at every step.
Do I have ownership of my mobile application, including the code?
Yes, you are the owner of Intellectual Property rights at all times.
Will you assist me in uploading my Android app to the Google Play Store? / my iOS app to the Apple Store? How?
Yes, of course. We will upload your Android application to the Google Play Store and your iOS app to Apple Store. It is also a part of our app development process. We will also guide you through the app setup on the stores regarding the marketing materials and descriptions.
Reviews
3 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
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Most relevant
A 
abdeldzns
Repeat Client
United States
Great experience working with Marcin. He stepped in with forward thinking advice that helped us plan smarter and avoid future issues, which made the whole process feel confidently guided.
$1,500-$2,000
Price
3 weeks
Duration
Helpful?S 
substrader
United Kingdom
The development team picked up our ongoing project seamlessly, kept it secure and performing reliably, and built on what we already had. They worked efficiently, communicated clearly, and delivered updates without disrupting our daily operations. Thanks for the great work.
$1,500-$2,000
Price
11 days
Duration
Helpful?C 
carolgaus
Repeat Client
Spain
As a client of Inventively, integrating AppsFlyer into our app has significantly enhanced our marketing insights. Their expertise in app payment analytics solved our attribution issues, making our marketing efforts more targeted and effective. Highly recommend their services!
$50-$100
Price
2 days
Duration
Helpful?
Reviews
3 reviews for this Gig
| (3) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
A abdeldzns
Repeat Client
United States
Great experience working with Marcin. He stepped in with forward thinking advice that helped us plan smarter and avoid future issues, which made the whole process feel confidently guided.
$1,500-$2,000
Price
3 weeks
Duration
Helpful?S substrader
United Kingdom
The development team picked up our ongoing project seamlessly, kept it secure and performing reliably, and built on what we already had. They worked efficiently, communicated clearly, and delivered updates without disrupting our daily operations. Thanks for the great work.
$1,500-$2,000
Price
11 days
Duration
Helpful?C carolgaus
Repeat Client
Spain
As a client of Inventively, integrating AppsFlyer into our app has significantly enhanced our marketing insights. Their expertise in app payment analytics solved our attribution issues, making our marketing efforts more targeted and effective. Highly recommend their services!
$50-$100
Price
2 days
Duration
Helpful?
