Freelancer profile translated to English.
Back to original languageAbout Olivier
I build web applications. Full-stack, from database to UI.
My background is in **Business Informatics**, not just Computer Science. This means: I understand what you want to achieve with the software, not just how the code should look.
Stack: Next.js, React, TypeScript, Node.js, PostgreSQL. No WordPress, no Shopify, no templates.
What I often do: Digitize processes that are currently in Excel or via email. Connect systems that don't talk to each other. Build backends that can do more than a standard tool.
Industry focus is on Real Estate and PropTech, but that's not a must.
I work alone, communicate directly, deliver without drama.
German
Native or bilingual
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- Olivier Wittek - IT-DienstleistungenBusiness System Builder & IT ConsultantOctober 2025 - Today (10 months)Mainz, GermanyI develop web applications for companies that want to digitize their processes. Full-stack, from database to user interface.Typical projects: Replacing Excel processes, connecting systems that don't talk to each other, building internal tools that aren't commercially available.Before that, I was Application Lead at a startup. There I built a SaaS platform with 12+ integrations and scaled it from prototype to product. This experience helps now: I know what works and what doesn't.Industry focus: Real Estate and PropTech. Other industries are also possible.
- Everest SystemsSoftware EngineerSOFTWARE PUBLISHINGJune 2023 - October 2025 (2 years and 4 months)Heidelberg, BW, GermanyApplication Lead for Cloud Cost Management:Architecture and development of an enterprise platform for managing SaaS costs. Scaling from prototype to production-ready solution with commercial distribution on ERP platform. Technical lead in the initial 2-person team until launch.Subsequently: Participation in the launch of AiSpecify (AI app from concept to launch in a 2-person team),
- AvayaSoftware EngineerTELECOMMUNICATIONSOctober 2019 - May 2023 (3 years and 7 months)Frankfurt, GermanyAutomation & optimization of complex cloud deployments for contact center solutions. Includes test automation, server setup & development of new solutions
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Education
- B.Sc. Business Informatics - Software Engineering MajorDHBW Mannheim2022Bachelor of Science - BSc.