I'm a software engineer based in Taipei, with an academic background in computer science, networking, and security. For the last decade I have built products for B2B security and endpoint-management companies, marketing platforms, and advertising technology. I take contracting work and build the whole product. That covers what your users see, whether it is a website, a web app, or a mobile or desktop client, and what sits behind it: servers, database, and integrations with the tools you already use. It also covers the less visible parts: reliable hosting, automated releases, monitoring that catches problems before your customers report them, and running costs that stay predictable as you grow. Where AI has a clear use in a workflow, I build that in as well.…

Jan Schupke

I'm a software engineer based in Taipei, with an academic background in computer science, networking, and security. For the last decade I have built products for B2B security and endpoint-management companies, marketing platforms, and advertising technology. I take contracting work and build the whole product. That covers what your users see, whether it is a website, a web app, or a mobile or desktop client, and what sits behind it: servers, database, and integrations with the tools you already use. It also covers the less visible parts: reliable hosting, automated releases, monitoring that catches problems before your customers report them, and running costs that stay predictable as you grow. Where AI has a clear use in a workflow, I build that in as well.…

Available to hire

I’m a software engineer based in Taipei, with an academic background in computer science, networking, and security. For the last decade I have built products for B2B security and endpoint-management companies, marketing platforms, and advertising technology.

I take contracting work and build the whole product. That covers what your users see, whether it is a website, a web app, or a mobile or desktop client, and what sits behind it: servers, database, and integrations with the tools you already use. It also covers the less visible parts: reliable hosting, automated releases, monitoring that catches problems before your customers report them, and running costs that stay predictable as you grow. Where AI has a clear use in a workflow, I build that in as well.

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Skills

Experience Level

JavaScript
Expert
React JS
Expert
HTML5
Expert
CSS
Expert
Github
Expert
PHP
Intermediate
Symfony
Intermediate
Node.js
Intermediate
SQL
Intermediate
TypeScript
Intermediate
AngularJS
Intermediate
PostgreSQL
Intermediate
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Language

Czech
Fluent
Slovak
Fluent
English
Fluent
Finnish
Advanced

Work Experience

Founder/Developer at Ceum.app
April 1, 2026 - Present
Developed and launched a unified freelancer and solo entrepreneur platform, enabling users to manage their business’ work, time, finance and invoicing through a single workspace. Implemented a multilingual in-app support LLM assistant providing users with information from the platform's knowledge base and capable of operating over user’s data via LangGraph and MCP architecture.
Frontend Engineer at Smartly.io
November 1, 2019 - November 1, 2024
Built AI-driven automation features used by 100+ large Smartly customers to manage ad campaigns at scale, reducing manual campaign operations from hours to minutes and improving budget efficiency by double digit percentages. Designed and implemented a cross-platform API mapping layer that unified 5+ internal services with incompatible models, decoupled the UI from backend logic, and reduced integration friction. Interviewed 20+ engineering candidates and mentored 3 new hires within our team.
Frontend Engineer at Wandera CZ s.r.o. (acquired by Jamf)
December 1, 2017 - October 1, 2019
Served as feature owner and subject-matter expert for the device enrollment UI, enabling automated onboarding of all new customers with minimal support involvement. Led frontend modernization efforts by replacing Backbone views with React components, reducing legacy surface area by ~40% and improving reliability and testability. Developed an internal UI for Sales MitM demo tooling, used by the team to demonstrate product value and cited as a key factor in closing new clients.
Fullstck Engineer at Various
January 1, 2010 - November 1, 2017
Various software engineering jobs

Education

Bachelor of Science at University of South Bohemia, Faculty of Science
September 1, 2013 - June 1, 2016
Security and Computer Networks

Qualifications

Yleinen Kielitutkinto – Level 4 (B2)
January 1, 2024 - September 14, 2025
TOEIC Listening and Reading
June 1, 2014 - September 14, 2025
Oracle Academy Database Design and Programming with SQL
June 5, 2013 - September 14, 2025

Industry Experience

Computers & Electronics, Software & Internet, Media & Entertainment, Professional Services, Education
    Ceum

    Ceum helps solo freelancers keep the business side of work in order without turning into agency software. It covers time tracking, clients, projects, invoices, files, exports, and AI-assisted workflows over the same business data.