Jan Schulz - Fullstack Developer

Q: Where is Jan based?

Jan is based in Berlin, Germany .

Q: What languages does Jan speak?

Jan speaks the following languages: German (Native), English (Advanced), Spanish (Advanced) .

Q: How many years of experience does Jan have?

Jan has at least 15 years of experience. During this time, Jan has worked in at least 13 different roles and for 20 different companies . The average length of individual experience is 1 year and 8 months . Note that Jan may not have shared all experience and actually has more experience.

Q: What is Jan's latest experience?

Jan's most recent position is Fullstack Developer at Summify.News .

Q: What companies has Jan worked for in recent years?

In recent years, Jan has worked for Summify.News , Networld GmbH , Anonymous client , ReactArchitect.AI , and Fairmas GmbH .

Q: Which industries is Jan most experienced in?

Jan is most experienced in industries like Information Technology (IT) , Education , and Healthcare . Jan also has some experience in Banking and Finance , Retail , and Fashion and Apparel .

Q: Which business areas is Jan most experienced in?

Jan is most experienced in business areas like Information Technology (IT) , Product Development , and Business Intelligence . Jan also has some experience in Research and Development (R&D) , Strategy and Planning , and Marketing .

Q: Which industries has Jan worked in recently?

Jan has recently worked in industries like Information Technology (IT) , Education , and Healthcare .

Q: Which business areas has Jan worked in recently?

Jan has recently worked in business areas like Information Technology (IT) , Product Development , and Business Intelligence .

Recommended expert

Berlin, Germany

Experience

Aug 2025 - Present

7 months

Fullstack Developer

Summify.News

Developing an AI-enabled platform that summarizes YouTube channels into daily digests with article and podcast formats.
Built scalable backend in Node.js integrating OpenAI Whisper for transcription and GPT for summarization.
Implemented frontend in React with TypeScript, ensuring responsive design and accessibility.
Set up automated deployment pipelines and CI/CD with Docker & GitHub Actions.

Jun 2024 - Jul 2025

1 year 2 months

Fullstack Developer

Networld GmbH

Developed an AI-powered Business Intelligence Competition Tracker application.
Implemented real-time analytics dashboards with React and D3/Recharts.
Designed microservices in Node.js for scalable data ingestion and processing.
Built an online course platform with user authentication, payments, and video hosting.

Jan 2024 - Jul 2025

1 year 7 months

Fullstack Developer

Anonymous client

Worked on stealth AI medical startup project (cancelled due to lack of funding).
Built HIPAA-compliant infrastructure using AWS and Docker.
Developed clinical data dashboards with React, Next.js, and PostgreSQL.
Integrated medical AI models for patient data analysis and diagnostics.

Jan 2023 - Present

3 years 2 months

Founder

ReactArchitect.AI

Founded and developed SaaS tool for React project visualization and documentation.
Architected platform in NextJS 13 (experimental appDir) with TypeScript and React 18.
Implemented AI server using Node.js (Express) integrated with OpenAI APIs.
Created Electron-based desktop client with OAuth authentication and Stripe billing integration.

Jun 2021 - Dec 2022

1 year 7 months

Fullstack Developer

Fairmas GmbH

Enhanced large-scale Business Intelligence application (>165k LOC) built in React.
Developed new reporting features improving data insights for 150+ employees.
Fixed critical bugs, reducing system downtime and improving stability.
Collaborated with backend team to deliver solutions in ASP.NET C#.

Feb 2021 - May 2021

4 months

Fullstack Developer

Granola Studios GmbH

Built event management web application for Yabal, a 3D virtual game platform.
Designed and implemented microservices with Node.js, Docker, and Kubernetes.
Developed real-time event tracking features to support thousands of concurrent users.
Ensured secure deployment pipelines and optimized container performance.

Mar 2020 - Feb 2022

2 years

React Native Developer

HyperInteractive GmbH

Developed mobile app 'Parti' for theater venue management, published in App Store.
Integrated ticketing, scheduling, and push notifications.
Optimized performance for smooth user experience on iOS and Android.
Worked in an agile team delivering features iteratively.

Jan 2020 - Present

6 years 2 months

Online Teacher

Udemy.com

Created comprehensive 'React Training Course' reaching hundreds of students.
Designed video lessons, coding exercises, and quizzes for effective learning.
Maintained and updated course content with latest React best practices.
Received positive student feedback with an average 4.7/5 rating.

Dec 2018 - Present

7 years 3 months

Founder

Linkbox.io

Founded a startup building bookmarking and link management platform in React & NodeJS.
Won Startup-Weekend Prize for innovative product concept.
Implemented multi-user collaboration features and search optimization.
Scaled platform to handle thousands of users and millions of links.

Jul 2017 - Present

8 years 8 months

Lecturer

Digital Career Institute Berlin (DCI)

Teaching Fullstack React, React Native, NodeJS, HTML, CSS, Linux, and Git.
Mentored hundreds of students transitioning into IT careers.
Developed curriculum materials with focus on practical, project-based learning.
Introduced students to agile methodologies and modern DevOps practices.

Jan 2014 - Aug 2015

1 year 8 months

Germany

Web Developer

PDV-Systeme Erfurt

Developed web clients using Angular, HTML5, and Java Spring REST APIs.
Built Bugzilla analysis system with jQuery for tracking software issues.
Improved system scalability and reduced bug resolution time.
Worked closely with stakeholders to refine requirements.

Sep 2013 - Dec 2013

4 months

BI Developer

Flaconi GmbH

Built Data Warehouses to support online marketing and storage analysis.
Designed ETL processes to handle large datasets efficiently.
Provided actionable insights to marketing teams.
Ensured data quality and reporting accuracy.

May 2013 - Aug 2013

4 months

Freelancer IT Consulting

Delivered consulting services for IT system architecture and web applications.
Advised clients on database design, performance tuning, and cloud migration.
Built small-scale tools for business process automation.

Jan 2013 - Apr 2013

4 months

Master Thesis

HHL

Researched adaptation of Business Model Generation framework for internet business models.
Applied framework to selected startup case studies.
Produced academic thesis under supervision of Prof. Dr. Pinkwart.

Jun 2010 - May 2011

1 year

Junior BI Developer

Zalando GmbH

Conceived and developed Data Warehouses for operations, marketing, and customer service.
Implemented ETL processes in Java and Kettle.
Optimized reporting pipelines improving data availability.
Collaborated with cross-functional teams to align data requirements.

Aug 2009 - Feb 2010

7 months

Bachelor Thesis

TUM

Developed system for detecting human postures on images.
Implemented algorithms in C++ using OpenCV.
Performed accuracy testing with large datasets.
Presented thesis findings at the Chair of Image Understanding and Knowledge-based Systems.

Aug 2008 - Oct 2008

3 months

Intern

Platinnetz GmbH

Developed AdWords campaign optimization models.
Built mathematical models for viral marketing strategies.
Collaborated with marketing team to improve online reach.

Apr 2008 - Aug 2008

5 months

Developer

TUM

Developed RFID application for social networks using C#.
Led a team of three developers delivering a working prototype.
Conducted testing and deployment within university environment.

Apr 2007 - Aug 2007

5 months

Germany

Founder

Bayanoo Ltd

Co-founded Germany’s first marketplace for used cellphone contracts.
Acted as CTO, leading product development and technical strategy.
Built initial platform using PHP and MySQL.
Grew platform to several hundred users during initial phase.

Feb 2006 - May 2007

1 year 4 months

Augsburg, Germany

Freelancer

GBC AG Augsburg

Built depotspider.de, a platform for managing stock depots.
Developed secure web applications for financial data management.
Ensured scalability and reliability of platform infrastructure.

Apr 2004 - Jul 2004

4 months

Intern

PDV-Systeme GmbH

Worked as software engineering intern on client projects.
Assisted in development of internal tools.
Gained first professional programming experience.

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (12.5 years), Education (9.5 years), Healthcare (1.5 years), Banking and Finance (1.5 years), Retail (1 year), and Fashion (1 year).

Information Technology

Education

Healthcare

Banking and Finance

Retail

Fashion

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (13.5 years), Product Development (11.5 years), Business Intelligence (4 years), Research and Development (1 year), Marketing (0.5 years), and Strategy (0.5 years).

Information Technology

Product Development

Business Intelligence

Research and Development

Marketing

Strategy

Skills

Javascript
React
React Native
Nextjs
Nodejs
Sql
Linux
Typescript
Recharts/d3
Css/html
Aws
Jest
Mocha
Mongodb
Java
Java Spring
Angular
C# Asp.net
Docker & Kubernetes
C
C++
Langgraph
Langchain
N8n
Openai
Whisper Ai
Ai Agents

Languages

German

Native

English

Advanced

Spanish

Advanced

Education

Sep 2011 - Sep 2012

Leipzig Graduate School of Management (HHL)

MBA · Leipzig, Germany

Oct 2006 - Apr 2010

Technical University of Munich (TUM)

B.Sc. Computer Science · Computer Science · Munich, Germany

Sep 1996 - Jun 2005

Heinrich-Mann-Gymnasium

Abitur · Erfurt, Germany

Profile

Created

August 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Jan based?

Jan is based in Berlin, Germany.

What languages does Jan speak?

Jan speaks the following languages: German (Native), English (Advanced), Spanish (Advanced).

How many years of experience does Jan have?

Jan has at least 15 years of experience. During this time, Jan has worked in at least 13 different roles and for 20 different companies. The average length of individual experience is 1 year and 8 months. Note that Jan may not have shared all experience and actually has more experience.

What roles would Jan be best suited for?

Based on recent experience, Jan would be well-suited for roles such as: Fullstack Developer, Founder, React Native Developer.

What is Jan's latest experience?

Jan's most recent position is Fullstack Developer at Summify.News.

What companies has Jan worked for in recent years?

In recent years, Jan has worked for Summify.News, Networld GmbH, Anonymous client, ReactArchitect.AI, and Fairmas GmbH.

Which industries is Jan most experienced in?

Jan is most experienced in industries like Information Technology (IT), Education, and Healthcare. Jan also has some experience in Banking and Finance, Retail, and Fashion and Apparel.

Which business areas is Jan most experienced in?

Jan is most experienced in business areas like Information Technology (IT), Product Development, and Business Intelligence. Jan also has some experience in Research and Development (R&D), Strategy and Planning, and Marketing.

Which industries has Jan worked in recently?

Jan has recently worked in industries like Information Technology (IT), Education, and Healthcare.

Which business areas has Jan worked in recently?

Jan has recently worked in business areas like Information Technology (IT), Product Development, and Business Intelligence.

What is Jan's education?

Jan holds a Master from Leipzig Graduate School of Management (HHL) and a Bachelor in Computer Science from Technical University of Munich (TUM).