First-class outsourcing and outstaffing


OUR VISION Grossum is a passionate team of professionals who strive for deep understanding of clients’ challenges in order to bring them agile software development that meets their business values and needs. In April 2017 Grossum was acquired by The APP Solutions OUR MISSION Developing a better future by helping people find best ways to bring new ideas to life using world’s best IT practices. OUR VALUES Quality // Passion // Innovation // Agility and Self-Motivation // Open Processes We look forward to participate in ambitious, long-term projects with clients from all over the world. Our main goal is to contribute superb solutions to your projects and gain recognition as professionals you can truly rely on.

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Machine Learning

Data Analysis & Testing

Mobile Development

Web Development


  1. Amazon S3
  2. Swift
  3. Python
  4. iOS Development
  5. Objective-C
  6. Gradle
  7. Android App Development
  8. Core Data
  9. Retrofit
  10. Java
  11. TensorFlow
  12. Dropbox API
  13. Jenkins
  14. PHP Script

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Upwork activity

Hourly rate

$30.00 - $50.00

Total earned


Total hours


Total jobs


Member since

Dec 4, 2014

Company information

Agency size

11-50 workers

Year founded


Client focus

Large business

Medium business

English: Fluent