Mobile & Web
Product Studio

Amazing work! Not only was I impressed by the build quality, but the level of planning and attention to detail has been amazing. Highly recommend for anyone looking to hire not only expert developers, but also dynamic, critical-thinking planners who can help fulfill a long-term product vision.

Have worked with Olearis for 5 years, always great support and skills, they are our go to mobile developers for both Android and iPhone

Alexander and the entire team at Olearis went well and truly above and beyond on this project. It was an absolute pleasure working with them. They understood very quickly what needed to be done, helped prioritize the work, created some amazing designs, and developed and rolled it out very quickly. There was a lot of out of the box thinking too involving many other disciplines. They are very pragmatic and were always ready to share their experience and advice. Every one in the team was amazing. Easily one of the best experiences I have had on UpWork and we have already engaged them to work on other projects. Very highly recommended.

They focused on the final result and not just on the process. Thanks to Olearis' contributions, the client is able to release their projects on time and within budget. They're attentive, communicative, and quick to make changes and improvements.

I like their transparency and honesty. Olearis' work has received great feedback on its performance and UX. Moreover, the client is delighted with Olearis' ability to take care of their needs and deliver a communicative and transparent process using Jira, Google Drive, and Dropbox...

Olearis operates at a very senior level on all fronts of the project. Olearis has successfully delivered and maintained a fully functioning mobile app on the App Store and Google Play Store, receiving positive customer feedback. The team communicates effectively thanks to their listening skills and vast technical understanding.

Olearis provided an investment management company with backend, web, and mobile app development services. They didn't need to be supervised, thanks to their proficient and capable development team that could complete what was necessary within budget.

Everything worked so well on this project. Olearis delivered the project according to the estimates and with excellent quality. Despite the complexity of some parts, such as high-loading maps, they smoothly completed the tasks. Their expertise was top notch.

I interviewed 18 freelancers and agencies for this position. I am a product manager and founder, so it was VERY important for me to find the best product designers. Olearis (and specifically Alex and Lidia) were amazing and tied in the top 3, beating the competition on price (the other two wanted twice as much per hour). It was clear to me from the beginning that I was speaking to people with far more experience than me. This showed in the quality of the delivered product designs, in the breadth of adjacent knowledge and expertise they naturally possessed due to their extensive work experience (analytics, marketing, sales, ...) and in the highly professional, responsive, genuinely helpful and fun working relationship. It was a particular highlight to be able to provide constructive feedback and face no defensiveness and instead a genuine curiosity and desire to explore together and find the best solution for the customer. It is clear that years of experience have simply provided the confidence necessary to do an amazing job. I recommend them very highly!

Amazing work, relationship, and collaboration. Top tier. Alex and Andrii have been amazing to work with on their team and would work with them again in a heartbeat. Y'all are amazing!

Awesome delivery, understood requirement, very responsive. Astonishing app developed. The job was completed as expected. Alex is an exceptional team leader capable of managing multiple members and getting the work on time. Great Work !

Perfect experience working with Oleg and his team! They are skilled, knowledgeable, and responsible. Totally recommend and look forward to collaborating with them in the future!

Olearis is able to find expertise on a whole other level that we haven’t had anywhere else. The iOS app is smooth, and Olearis has helped refactor a solution to reduce its memory requirement from 10 GB to 30 MB. The team meets timelines, communicates via Slack, and uses Jira and Notion for project management. Their flexibility with the budget and ability to accommodate needs stand out

Olearis has provided us with the best people that I've ever worked with. The successful development of the app is now in use by five of the top twenty global financial institutions. Olearis has great quality assurance, competitive pricing, and a team of very skilled developers.

Very knowledgeable with app development and with using the latest AI to create applications integrated with ChatGPT and other LLMs.

I had a great experience working with Oleg on my document management platform. His expertise in Flutter, iOS, Android, and Fullstack Development really stood out, and they delivered high-quality results on time. The communication was smooth, and they were always quick to resolve any issues. I highly recommend them for any project involving mobile app development or mobile development services. Looking forward to future collaborations!

Olearis is a great and very strong development company. Olearis has been an instrumental partner for the client, allowing them to launch a new line of mobile apps that didn’t exist before. The team communicates clearly and works on an hourly basis.