Portrait of Roxanne König
Portfolio

Roxanne König

Software Developer | IT Systems Administrator | Data Science & DevOps Enthusiast

Motivated IT professional with solid experience in software development (Java, PHP, Python), data science, DevOps and systems administration – ready to apply my expertise in programming, data integration, automation and problem-solving.

15+ years

in IT (since 2010)

240+

hours of Java training

3

certifications (incl. TESDA)

1.0

grade in Data Engineering

Career path

About Me

Pedagogy meets engineering – from the classroom to the data pipeline.

My career combines teaching experience with technical IT support, software development and academic specialisation in Big Data and Data Science. As a Java trainer I taught aspiring developers object-oriented programming; as IT coordinator at Sisters of Mary School I was responsible for administering, maintaining and troubleshooting computer systems and networks.

Today I build data-driven solutions – from ETL and real-time pipelines (Apache Kafka, TimescaleDB) and machine-learning models (scikit-learn, TensorFlow/Keras) to containerised deployment with Docker. This combination of operations know-how, programming practice and data-science skills makes me a versatile engineer at the intersection of infrastructure and data.

Location

Grafschaft, Germany

Languages

German (B2) · English (C1)

Focus

Software Development & Data Science

Status

Open to new opportunities

Career

Professional Experience

From programming to training to systems administration – a hands-on career path.

2013 – 2016

Technical IT Support & Teaching (Computer Systems Servicing)

Sisters of Mary School · Cebu, Philippines

Teaching responsibility: designing and delivering computer and application software courses for students.
Technical IT support: administration, maintenance and troubleshooting of the school's computer systems and local network.
Hardware and software management: installation, configuration and maintenance of hardware and operating systems to keep teaching running smoothly.
Ensuring operational readiness: diagnosing and resolving complex technical issues to the Computer Systems Servicing (NC II) standard.
2018 – 2020

Self-employed Booking System Manager

Freelance · Philippines

Managed and optimised online booking systems to increase efficiency.
Maintained customer databases and interfaces to ensure data integrity and access.
2012 – 2014

Java Trainer

Call Center Academy · Cebu, Philippines

Trained participants in object-oriented programming (Java, OOP fundamentals).
Created teaching materials and hands-on exercises to deepen understanding.
Qualified through the 240-hour training programme "Career Entry for Software Developers: Java Programming" (2009).
2010 – 2011

Junior Programmer (PHP)

CODEIT · Cebu, Philippines

Developed and maintained web applications using PHP and MySQL.
Contributed to implementing new features and bug fixing.
Selected work

Projects

Hands-on projects at the intersection of data, development and infrastructure.

IoT Data Analytics & Real-Time Pipeline

Collection and analysis of sensor data (e.g. air quality, temperature) using Python, Pandas, Apache Kafka, TimescaleDB and Matplotlib.
Development of ETL and data pipelines for real-time processing and storage of sensor data in a time-series database (TimescaleDB).
Containerisation of all components (backend, database, API) with Docker, plus version control and CI/CD via Git/GitHub.

Machine Learning Fraud Detection

Development of a machine-learning model for fraud detection using Python, Pandas, PostgreSQL and scikit-learn.
Deep-learning approaches with TensorFlow/Keras and delivery of results via a RESTful API (Flask/FastAPI).
Model tracking with MLflow / Weights & Biases and prototyping in Jupyter Notebook.

Web Development with PHP/MySQL

Design and maintenance of database-driven web applications, including user interfaces and backend logic.
Tech stack

Skills & Technologies

A selection of the technologies and methods I work with every day.

Programming Languages

Data & Big Data

DevOps & Tools

IT Systems & Networks

Methods & Frameworks

Qualifications

Education & Certificates

Education, further training and certified qualifications.

Education & Further Training

10/2024 – 06/2025

Big Data Masterclass (part of B.Sc. Data Science)

IU International University of Applied Sciences (distance learning)

Focus areas: Data Engineering, Big Data Technologies, Cloud Computing, Data Science Software Engineering, Data Quality & Data Wrangling.

Successfully completed modules (excerpt):

Data Engineering (grade 1.0)
Introduction to Data Science (grade 1.3)
Data Quality & Data Wrangling (grade 1.3)
2006 – 2009

B.Sc. in Information Technology

University of Cebu, Philippines

Focus: programming & software development, hardware maintenance. Graduated March 2009.

Languages & Language Courses

German: good working knowledge (B2) · English: very good (C1)

GermanB2 · Good working knowledge
EnglishC1 · Very good
A1 German course: 25 Mar 2017 – 25 Sep 2017
B1 German course & integration course: 25 Mar 2024 – 23 Aug 2024
Professional language course (BSK – job-specific): 18 Aug 2025 – 15 Dec 2025

Certifications & Qualifications

10 Jan 2017

National TVET Trainer Certificate Level I

TESDA, Philippines

Qualified to conduct training and assessments in the technical field.

24 Apr 2016

Computer Systems Servicing NC II

TESDA, Philippines

Comprehensive qualification in installing, configuring, maintaining and troubleshooting computer systems and networks.

25 Jan 2010

Career Entry for Software Developers: Java Programming

Call Center Academy, Cebu

240-hour intensive training in object-oriented programming with Java.

Contact & enquiries

Contact

Have a project, an open position or a question? Feel free to write to me – I reply quickly.

Contact details

I am open to remote positions and projects across Germany in software development, data engineering and DevOps.

Slide to send Sent!