Timon Ringwald - Database Developer – Research Project

Q: Where is Timon based?

Timon is based in Bielefeld, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Timon speak?

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

Q: How many years of experience does Timon have?

Timon has at least 7 years of experience. During this time, Timon has worked in at least 11 different roles and for 1 company . The average length of individual experience is 1 year and 8 months . Note that Timon may not have shared all experience and actually has more experience.

Q: What is Timon's latest experience?

Timon's most recent position is Database Developer – Research Project – Healthcare Billing at MeQuEn GmbH .

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

In recent years, Timon has worked for MeQuEn GmbH .

Q: Which industries is Timon most experienced in?

Timon is most experienced in industries like Information Technology , Automotive , and Healthcare . Timon also has some experience in Construction , Real Estate , and Manufacturing .

Q: Which business areas is Timon most experienced in?

Timon is most experienced in business areas like Information Technology , Product Development , and Quality Assurance . Timon also has some experience in Operations and Research and Development .

Q: Which industries has Timon worked in recently?

Timon has recently worked in industries like Information Technology , Automotive , and Healthcare .

Q: Which business areas has Timon worked in recently?

Timon has recently worked in business areas like Information Technology , Product Development , and Quality Assurance .

Recommended expert

Bielefeld, Germany

Experience

Sep 2025 - Oct 2025

2 months

Database Developer – Research Project – Healthcare Billing

MeQuEn GmbH

Optimizing dynamically generated databases for logging
Tools: MariaDB, C#, Visual Studio, VMs, Docker, Windows, Linux

Jan 2024 - Aug 2025

1 year 8 months

Backend Developer – Data Exchange Platform

MeQuEn GmbH

Developing a RESTful API for creating and managing KVNRs
Implementing secure storage and transmission of KVNR data in compliance with data protection regulations (e.g., GDPR)
Implementing efficient validation and error handling to ensure correct number generation
Integrating a logging mechanism for system operations tracking and auditability
Designing and implementing a microservice architecture to integrate various data sources
Developing an API gateway solution with Spring Boot for internal and external service communication
Implementing synchronization and harmonization methods for consistent data representation
Implementing error handling and retry mechanisms for increased reliability
Implementing a deletion concept for personal data according to GDPR
Tools: Java, Spring Boot, Maven, IntelliJ, Postman, OpenAPI/Swagger, PostgreSQL, OPNsense

Dec 2023 - Mar 2025

1 year 4 months

Administrator – Part-time Projects for Various Clients

MeQuEn GmbH

Setting up a wired and Wi-Fi network based on TP-Link Omada with redundant architecture and Wi-Fi mesh for seamless transition
Configuring VLANs for segmentation (staff, guests, IoT) and QoS rules for critical applications
Installing and maintaining multiple web servers with load balancing, HTTPS via Let’s Encrypt, automated backups, caching (Redis, Memcached) and security measures (SSH hardening, fail2ban, security audits)
Building a smart home with Zigbee mesh, automation rules (motion, weather data), encrypted communication and energy-optimized device integration
Tools: Linux (Ubuntu Server, Raspberry Pi OS), TP-Link Omada Controller, Wireshark, Nginx, Caddy, Docker, Grafana, Home Assistant, Zigbee, MQTT

May 2023 - Sep 2023

5 months

Backend Developer – Event Software

MeQuEn GmbH

Software solution for accrediting event participants
Defining interfaces and documenting with Swagger/OpenAPI for an API-first approach
Designing and implementing the backend architecture
Testing and deploying the solution in the cloud
Tools: Java, Spring Boot (microservices), Swagger, MinIO, MariaDB, GitHub, Kubernetes, Linux

Nov 2022 - Nov 2023

1 year 1 month

Backend Developer – Whistleblower Protection Software

MeQuEn GmbH

SaaS development for various end customers, product lettly.de
Implementing cryptographic procedures according to BSI Standard TR 02102-1
Implementing security and access concepts in backend systems
Implementing a reporting center according to the Whistleblower Protection Act
Integrating Stripe as a payment provider
Tools: Java, Spring Boot (microservices), Swagger, MongoDB, MinIO, MariaDB, GitHub, Kubernetes, Linux

Aug 2022 - Apr 2023

9 months

Backend Developer – Voting Software

MeQuEn GmbH

SaaS development for various end customers, product ballotly.de
Implementation of cryptographic procedures according to BSI Standard TR 02102-1 and Common Criteria (CC)
Implementation of business logic according to election regulations
Creation of a synchronization concept for a distributed architecture
Tools: Java, Spring Boot (Microservices), Swagger/OpenAPI, Redis, SSE, DDA, MinIO, MariaDB, GitHub, Kubernetes, Linux

Jun 2022 - Oct 2024

2 years 5 months

Part-Time Project – Automotive Supplier

MeQuEn GmbH

Design of a client-server software architecture for scalability across multiple workstations
Development of interfaces to control industrial Zebra label printers
Design and implementation of bidirectional data synchronization between the labeling system and MS SQL database
Software support and maintenance
Tools: IntelliJ, Java, JavaFX, MS SQL, Linux Raspberry Pi OS, Raspberry Pi

Apr 2021 - Apr 2022

1 year 1 month

Fullstack Developer – Plant Monitoring

MeQuEn GmbH

Further development of a platform for production support in a distributed machine landscape
Development and commissioning of solutions for different equipment generations
Technology consulting for new installations
Tools: Software architecture (EDA, DDD), Java, Spring Boot, MinIO, MySQL, MongoDB, MQTT, Mail-Proxy & Bridges, C#, Linux

Jan 2021 - Jul 2022

1 year 7 months

Backend Developer – Documentation Tool

MeQuEn GmbH

Development of a service app as a documentation and reference tool for machines, projects, real estate & facility management
Template-based process documentation to ensure consistent quality
Tools: Java, Spring Boot (Microservices), NodeJS, MongoDB, MinIO, MariaDB, GitLab, Docker, Docker-Compose, Linux

Mar 2019 - Dec 2020

1 year 10 months

App Developer – Quality Assurance

MeQuEn GmbH

Networked Android app for quality control in road and asphalt construction
Design and implementation of the infrastructure and the Android app
Mathematical modeling of business logic
Tools: Java, Android, BLE, SQLite, GitLab, Confluence, Linux

Jul 2018 - Mar 2019

9 months

Fullstack Developer – process management

MeQuEn GmbH

Further development of a platform for process optimization and management in agriculture and forestry businesses
Technology consulting
Tools: Software architecture (EDA, DDD), Java 8, Angular, NodeJS, Apache Cassandra, MariaDB

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Automotive, Healthcare, Construction, Real Estate, and Manufacturing.

Information Technology

Automotive

Healthcare

Construction

Real Estate

Manufacturing

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Quality Assurance, and Operations.

Information Technology

Product Development

Quality Assurance

Operations

Summary

Digitalization and software development that add value - from the first idea to the final solution. I enjoy finding the right solutions together with my clients! On the web, I'm at home in the backend - interfaces are my strength.

Core activities: developer, software architect.

Industries: industry, plant engineering and packaging, health insurance, road construction and maintenance, agriculture and forestry, safety-critical infrastructure, cyber security.

Skills

Software Development: Java (12 Years), Spring Boot / Microservices (5 Years), Vb.net (4 Years), Winforms (4 Years), Javascript (7 Years), Node.js (2 Years), Typescript (2 Years), Vb6 (5 Years), C# (5 Years), Go (8 Years), Rust (2 Years), C/c++ (3 Years), Bash (6 Years)
Databases: Ms Sql (3 Years), Postgresql (5 Years), Redis (2 Years), Sqlite (3 Years), Mariadb (10 Years), Mysql (10 Years), Mongodb (5 Years), Minio (3 Years), Graphql (1 Year)
Data Expertise: Geodata, Database Design, Database Optimizations
Operating Systems: Linux (15 Years) => Bash, Sh, Daemon Development, Ubuntu, Debian, Arch Linux, Embedded Linux, Raspberry Pi Os
Operating Systems: Windows (10 Years) => Powershell, Automated Testing With Junit, Postman
Interfaces: Rest, Swagger, Openapi, Stripe, Paypal
Other Tools & Techniques: Docker, Docker Compose, Mqtt, Git, Github Including Build Pipelines, Jira, Confluence, Vs Code, Jetbrains Ides, Mail Proxies & Bridges, Grafana, Tp-link Omada, Vlan, Zigbee, Nginx, Caddy, Bsi Standard Tr 02102-1
Methodologies: Scrum, Kanban, Waterfall

Languages

German

Native

English

Advanced

Education

Jul 2014 - Jul 2018

b.i.b. International College Bielefeld

Professional training in application development · Bielefeld, Germany

Certifications & licenses

Pen-Tester

Statistics

Experience

Total positions 11

Experience in Information Technology 4 y

Avg length 1 y 1 m

Longest experience 2 y 4 m

Expertise

Recent roles Database Developer – Research Project – Healthcare Billing, Backend Developer – Data Exchange Platform, Administrator – Part-time Projects for Various Clients

Main industries Information Technology, Automotive, Healthcare

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Certifications earned 1

Profile

Created

July 2025

Last Update

October 2025

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

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

Where is Timon based?

Timon is based in Bielefeld, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Timon speak?

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

How many years of experience does Timon have?

Timon has at least 7 years of experience. During this time, Timon has worked in at least 11 different roles and for 1 company. The average length of individual experience is 1 year and 8 months. Note that Timon may not have shared all experience and actually has more experience.

What roles would Timon be best suited for?

Based on recent experience, Timon would be well-suited for roles such as: Database Developer – Research Project – Healthcare Billing, Backend Developer – Data Exchange Platform, Administrator – Part-time Projects for Various Clients.

What is Timon's latest experience?

Timon's most recent position is Database Developer – Research Project – Healthcare Billing at MeQuEn GmbH.

What companies has Timon worked for in recent years?

In recent years, Timon has worked for MeQuEn GmbH.

Which industries is Timon most experienced in?

Timon is most experienced in industries like Information Technology, Automotive, and Healthcare. Timon also has some experience in Construction, Real Estate, and Manufacturing.

Which business areas is Timon most experienced in?

Timon is most experienced in business areas like Information Technology, Product Development, and Quality Assurance. Timon also has some experience in Operations and Research and Development.

Which industries has Timon worked in recently?

Timon has recently worked in industries like Information Technology, Automotive, and Healthcare.

Which business areas has Timon worked in recently?

Timon has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.

What is Timon's education?

Timon attended b.i.b. International College Bielefeld for Professional training in application development.

Does Timon have any certificates?

Timon has 1 certificate: Pen-Tester.

What is the availability of Timon?

Timon is immediately available full-time for suitable projects.

What is the rate of Timon?

Timon's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.