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Mostafa S.

Freelance Senior Software Engineer & AI Consultant

Leipzig, Germany

Experience

Jun 2025 - Present
7 months
Leipzig, Germany

Freelance Senior Software Engineer & AI Consultant

Self-employed

  • Led the development of a complex geospatial data platform, engineering an end-to-end system for processing and analyzing high-resolution aerial imagery.
  • Engineered a scalable backend responsible for on-the-fly map tile serving and running complex data analysis queries using PostGIS and Python.
  • Developed and trained custom computer vision models using Python, PyTorch, and YOLOv8 to perform object detection and segmentation on large-scale datasets.
  • Built modern, responsive user interfaces and data visualization dashboards using Next.js, TypeScript, and React.
  • Gained practical expertise in geospatial libraries such as GDAL and Rasterio for processing and manipulating raster and vector data.
  • Managed the entire project lifecycle, from initial technical architecture and database design to final deployment using Docker.
  • Tech stack: Python, PyTorch, YOLOv8, OpenCV, GDAL, Next.js, Node.js, TypeScript, PostGIS, Docker, AWS/Cloud Storage.
Jan 2024 - Present
2 years

Tech Lead / Full-Stack Engineer

Kuyua GmbH

  • Led the development of an in-house Geo-Server using Node.js and PostGIS, improving location environment assessment from 1-2 minutes (as a background job) to an on-the-fly assessment within 3-7 seconds, enhancing system efficiency.
  • Built a RAG system for environmental action plans (Recommendation system using BERT & FAISS).
  • Managed a new team of 5 developers and 1 GIS expert.
  • Helped to secure contracts with major clients like Mercedes, Siemens Mobility, BASF, and VW.
  • Led brainstorming sessions with cross-functional teams to define and refine technical solutions.
  • Performed QA testing and code review.
  • Tech stack: Node.js, Directus CMS, Rabbitmq, Python, Java, SpringBoot, Next.js, TypeScript, PostgreSQL, PostGIS, RAG, BERT, FAISS, MongoDB, Redis, Docker, Kubernetes.
Dec 2022 - Dec 2023
1 year 1 month

Full-Stack Developer

Fashion Digital GmbH (Peek & Cloppenburg)

  • Customized CMS content using Magnolia.
  • Performed backend development.
  • Built a custom component library and improved the product page (PDP) using Next.js.
  • Collaborated with UI/UX designers in an agile environment.
  • Tech stack: Java, Magnolia CMS, SpringBoot, Golang, Kafka, Next.js, TypeScript, PostgreSQL, MongoDB, Redis.
Dec 2021 - Nov 2022
1 year

Tech Lead

Quadraton GmbH

  • Led the development of document and GDPR analysis systems.
  • Mentored junior developers and defined software architecture.
  • Created microservices, CI/CD pipelines, and conducted code reviews.
  • Tech stack: Node.js, Vue.js, Quasar, TypeScript, PostgreSQL, MongoDB, Redis, Docker.
May 2020 - Nov 2021
1 year 7 months

Full-Stack Developer

Zizooboats GmbH

  • Improved booking conversion from 25% to 65% by optimizing the search engine using Lucene.
  • Reduced landing page load time from ~15s to ~3s using Next.js.
  • Maintained and enhanced product pages with Next.js.
  • Tech stack: Node.js, Java, SpringBoot, Lucene, PHP, Next.js, TypeScript, PostgreSQL, MongoDB, Redis.
Jun 2018 - Apr 2020
1 year 11 months

Software Developer / Consultant

Wunderdog

  • Developed an online payment microservice.
  • Built a GDPR analysis platform.
  • Tech stack: Node.js, MongoDB, Redis.
Jan 2014 - Dec 2018
5 years

CTO

ASEC

  • Led a team of 4 full-stack engineers implementing internal applications.
  • Improved system performance, securing major contracts.
  • Managed technical architecture and project direction.
Jan 2008 - Dec 2018
11 years

Full-Stack Developer

Freelancer

  • Worked on various projects as a full-stack developer.
  • Tech stack: .NET C#, WordPress CMS.
Jan 2008 - Dec 2014
7 years

Senior Software Engineer

ASEC

  • Developed internal applications (preventive maintenance system, ticketing system) using .NET C#, jQuery, Node.js, Java, and React.js.
Jan 2005 - Dec 2008
4 years

Full-Stack Developer

SODIC

Summary

Experienced Software Engineer and entrepreneurial technology leader with a passion for leveraging data-driven solutions to solve complex environmental and agricultural challenges.

Uniquely combines deep, hands-on expertise in full-stack development and AI with a proven track record of founding a venture, leading teams, and delivering end-to-end products.

Proficient in architecting scalable systems using Node.js, Python, and Java, and deploying them efficiently with Docker, Kubernetes, and CI/CD pipelines.

Languages

Arabic
Advanced
English
Advanced

Education

Oct 2008 - Jun 2010

Arab Academy for Science & Technology

Bachelor in Information Systems · Information Systems · Egypt

Oct 1997 - Jun 2001

Cairo University

Bachelor in Business Administration · Business Administration · Egypt

Certifications & licenses

German A1/A3 Drone License

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