Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Hi, I’m Omar Ahmed, an iOS developer and open-source contributor based in Berlin, Germany. Over the past seven years I’ve built scalable mobile applications and contributed to the Corona-Warn-App, which achieved 46 million downloads and reached #1 on the German App Store. I enjoy mentoring junior developers, leading projects, and delivering high-quality code. I emphasize clean architectures (MVC/MVVM), thorough testing, and collaboration with PMs and UX teams to ship impactful software across iOS and web platforms.…Hi, I’m Omar Ahmed, an iOS developer and open-source contributor based in Berlin, Germany. Over the past seven years I’ve built scalable mobile applications and contributed to the Corona-Warn-App, which achieved 46 million downloads and reached #1 on the German App Store. I enjoy mentoring junior developers, leading projects, and delivering high-quality code. I emphasize clean architectures (MVC/MVVM), thorough testing, and collaboration with PMs and UX teams to ship impactful software across iOS and web platforms.

Omar Ahmed

App Developer, Web Developer, Full Stack Developer, +4





Hi, I’m Omar Ahmed, an iOS developer and open-source contributor based in Berlin, Germany. Over the past seven years I’ve built scalable mobile applications and contributed to the Corona-Warn-App, which achieved 46 million downloads and reached #1 on the German App Store. I enjoy mentoring junior developers, leading projects, and delivering high-quality code. I emphasize clean architectures (MVC/MVVM), thorough testing, and collaboration with PMs and UX teams to ship impactful software across iOS and web platforms.…Hi, I’m Omar Ahmed, an iOS developer and open-source contributor based in Berlin, Germany. Over the past seven years I’ve built scalable mobile applications and contributed to the Corona-Warn-App, which achieved 46 million downloads and reached #1 on the German App Store. I enjoy mentoring junior developers, leading projects, and delivering high-quality code. I emphasize clean architectures (MVC/MVVM), thorough testing, and collaboration with PMs and UX teams to ship impactful software across iOS and web platforms.

Available to hire

Hi, I’m Omar Ahmed, an iOS developer and open-source contributor based in Berlin, Germany. Over the past seven years I’ve built scalable mobile applications and contributed to the Corona-Warn-App, which achieved 46 million downloads and reached #1 on the German App Store.

I enjoy mentoring junior developers, leading projects, and delivering high-quality code. I emphasize clean architectures (MVC/MVVM), thorough testing, and collaboration with PMs and UX teams to ship impactful software across iOS and web platforms.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior iOS Developer / React Developer at SAP SE

December 1, 2024 - October 10, 2025

Developed key features for Germany's Corona-Warn-App open-source project (46 million downloads) and other internal SAP apps. Increased unit test coverage to 70% on business logic modules. Mentored 2 developers in the last 6 months as team lead. Developed React code for an internal AI tool.

iOS Developer at AppsFactory GmbH

November 1, 2020 - October 10, 2025

Worked on various SaaS iOS applications in energy and medical fields (e.g., SMA8, Barmer8, Beurer HealthManager Pro). Updated legacy Objective-C code to Swift in the Andachts app.

Junior iOS Developer at Vinearity GmbH

June 1, 2019 - October 10, 2025

Worked on the Kagship vector graphic design app '3ectornator'. Implemented gamification features using SceneKit with 3D objects.

Senior iOS developer/ React developer at SAP SE

December 1, 2024 - October 10, 2025

Developed key features for Germany's open-source Corona-Warn-App and other internal Apps for SAP. Increased the unit tests coverage to 70% on business logic modules. Mentored 2 developers during the last 6 months of the project as I was appointed Team lead. Developed React code for an internal AI tool.

iOS developer at AppsFactory GmbH

November 1, 2020 - October 10, 2025

Worked on different SaaS iOS applications in Energy and medical fields like SMA8, Barmer8 and Beurer HealthManager Pro. Updated legacy code written in Objective-C to Swift in Andachts app.

Junior iOS developer at Vinearity GmbH

June 1, 2019 - October 10, 2025

Working on the Kagship vector graphic design app 3ectornator. Implemented gamification feature using SceneKit with AR objects.

Junior iOS developer at RobustaStudio

December 1, 2011 - October 10, 2025

Working on different SaaS iOS applications in e-commerce and ride-hailing fields like B-Tech and Swyft.

Senior iOS developer/ React developer at SAP SE

December 1, 2024 - October 10, 2025

Developed keys features for Germany's open-source project: Corona-Warn-App. (46 million downloads) as well as other internal Apps for SAP. Increased the unit tests coverage to 70% on business logic modules. Mentored 2 developers during the last 6 months of the project as i was appointed Team lead. Developed React code for an internal AI tool.

iOS developer at AppsFactory GmbH

November 1, 2020 - October 10, 2025

Worked on different SaaS iOS applications in Energy and medical fields like SMA8 Barmer8 and beurer HealthManager Pro. updated legacy code writen in objective C to swift in Andachts app.

Senior iOS developer at SAP SE

December 1, 2024 - October 10, 2025

Senior iOS developer for SAP internal applications; also contributed as a React developer for an internal AI tool; responsible for iOS code reviews for other SAP teams.

Senior iOS developer / Team lead (Corona-warn-app project) (Open-Source Repo) at SAP SE

December 1, 2023 - October 10, 2025

Developed features for Germany's open-source Corona-Warn-App (46M downloads). Increased unit test coverage to 70% on business logic modules. In the last six months, appointed as team lead, mentored junior developers, and represented the team in client PM meetings.

iOS developer at AppsFactory

November 1, 2020 - October 10, 2025

Worked on SaaS iOS applications in energy and medical domains, including SMA, Barmer, and Beurer HealthManager Pro.

iOS developer at Linearity

June 1, 2019 - October 10, 2025

Flagship vector graphic design app Vectornator; implemented gamification feature using SceneKit with 3D objects.

Junior iOS developer at Robusta Group

December 1, 2018 - October 10, 2025

Worked on SaaS iOS applications in e-commerce and ride-hailing fields like B-Tech and Swyft.