Refactoring Experts in Dusseldorf
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Meet FRATCH Experts in Dusseldorf, who have recently used Refactoring
Marijn Scholtens
Last position:
Senior Software Engineer at Puls Security GmbH
Optimizing and acceleration of our Gitlab CI pipeline
Conceptual work for the PoC of the Zero Trust system
Extension of the policy-engine backend in Go
Extension of the policy-testing mechanism in Python
Architectural design of the PEP component of Zero Trust
Documentation of the product
Technologies: Zero Trust, Go, Python, Gitlab CI, Docker, JWT, Domain-Driven Design
Olaf Radicke
Last position:
DevOps Architect / Consultant at Authority with increased security requirements
- Identification of requirements (legal, organizational, and technical)
- Design of solution architectures
- Evaluation of concepts and technologies
- Preparation of decision templates
- Architectural Decision Records (ADR)
- Coordination of implementation
- Review of implementations
- Documentation
Kacper Kowalski
Last position:
Author
Seqnaut and Sycosm (WIP) – Embedded Audio DSP & Synthesis Platform
- Embedded audio DSP framework — synthesizers, effects, drum machines; modular audio graph
- Sequencing: PianoRoll, StepGrid, MasterClock; 8-voice polyphonic synth; CLI + OSC
- Transient Detector — dual-envelope adaptive threshold, guitar attack detection
- Hardware: Teensy 4.1, custom AFE design tapping BOSS GX-100; MIDI FX integration
Label: C++23, C, Python, CMake, FreeRTOS, Teensy 4.1 (ARM Cortex-M7), Teensy Audio (Stoffregen), DaisySP, I2S/SAI, OSC, MIDI
Thorsten Otremba
Last position:
Workstream Lead (WS) at Bank-Verlag GmbH
- Introduction of giro card with Visa Debit card payment function (Combocard) for Commerzbank
- Support for the Card Processing Team (card processing; Clearing & Settlement incl. Dispute Management teams) in project work
- Creation of requirements for the Clearing & Settlement team, Authorization team (AZ) and Card Production team (KP) as part of a requirements catalog
- Requirements engineering (requirements management) with business contact person
- Participation in workstream meetings between VISA Inc., SRC Security Research & Consulting GmbH, Commerzbank AG and consulting firms (PwC and Senacor Technologies AG)
- Sprint planning with Jira tickets of type Task and use of Confluence
- Creation and presentation of weekly status reports for the Clearing & Settlement, Dispute Management and Reporting & GUI workstreams
- Coordination with network and file transfer teams for connection tests of new interfaces, e.g. setup of host keys, use of VPN or sipnet connections
- Coordination of the delivery of test files, e.g. exchange rates (FX rates; TC 56 of VISA rates), VISA Debit and Credit transactions (format Base II) and EANSS/ISS Base II clearing files to the Debit Clearing System (DCS)
- Conducting coordination meetings on the use of Visanet Settlement Service (VSS) and PSD2 reports and payment traffic statistics (ZVS)
- Organizing workshops with FiServ (First Data) on Dispute Management and complaint handling
- Setup and maintenance of Open Point List (OPL) in Confluence
- Technologies/methods: Jira, Confluence, giro card, VISA Debit card, payments, Kanban board, BIN, routing, CIQ, VPAY, ScalaTest, Dispute Management
Hassan Amjad
Last position:
IT Consultant at ALDI South (Albrecht's Discount)
- Supporting the DevOps team in Terraform-managed, multi-region AWS infrastructure to achieve environment parity.
- Developed end-to-end CI/CD pipelines using AWS CodePipeline, CodeBuild, and CodeDeploy, automating the build and deployment.
- Maintained pre- and post-deployment scripts to automate critical tasks such as database schema migrations and environment sanity checks.
- Implemented CI/CD flow specifically for hotfixes via separate Git branches, managing back-merge activities from feature branches to release branches to ensure code integrity through automated conflict resolution.
- Deployed a dedicated, lightweight sanity check application hosted cost-effectively on Azure Container Apps to run automated health and basic functional checks as a post-deployment activity triggered via pipeline.
- Investigated production incidents through code changes and AWS CloudWatch logs.
- Coordinated integration of Dynatrace APM and its APIs for monitoring purposes.
- Full stack QA strategist for a high-traffic e-commerce platform built on a layered architecture for the back-end testing of core platform services, especially the order management system in Zed and Glue layers.
- Managed automation activities, testing process, and refactoring practices.
- Responsible for framework migrations, setup, and training for new automation frameworks.
- Promoted a shift-left approach within the QA team and created the test concept.
- Participated in meetings with IT managers, business owners, product owners, and team members.
Dmitry Tarantin
Last position:
Web Software Engineer at Freelancer
Third-side integration development (REST: Amazon, OpenAI, Etsy, Shopware, Prestashop, etc)
Performance optimization (Refactoring, SQL analysis)
LMS development and deployment (Moodle)
Cloud deployment automation (Amazon, Azure, Gitlab CI/CD, Docker)
Backend and Frontend development (Laravel, VueJs)
Collaboration with partner-developers (national and international)
Shirtigo GmbH
GRELLARTIG Digital GmbH
velpTEC edutainment GmbH
Jan G.
Last position:
Master Data Application at confidential
Visualization, search, and maintenance of various types of master data, providing them via a REST API, and implementing a variety of import and export formats.
Implementation, architecture, project management.
Technologies and tools: Angular (Signals, Signal Store, swagger-codegen, standalone components), Java, PostgreSQL, ActiveMQ, JavaScript, Spring Boot (Spring Core, Spring MVC, Spring Data/JPA via Hibernate, Spring Security, Spring Modulith), JUnit, Flyway, QueryDSL, GraphQL, REST API, Node, npm, Maven, SonarQube, GitLab CI/CD pipelines, Docker, Nexus, OpenAPI + Swagger UI, Keycloak, OAuth2, OpenID Connect, IntelliJ IDEA, Jira, Confluence.
Sebastian Chece
Last position:
Public institution responsible for educational institutions in NRW
- Consulting on processes and execution of load tests, performance tests and technical tests of various applications: web portal, file cloud, email, video conferencing, learning/course platform
- Creating the load test framework
- Programming test scripts (JMeter, Selenium)
- Developing batches to support the evaluation
- Executing load tests and evaluating results, including clear reporting, recommendations for action, and bottleneck analysis
- Managing tasks and collaboration to achieve meaningful load test results
Andreas Grutz
Last position:
Senior Fullstack .NET (Core) & Angular Developer at IT service provider
- Supported an agile team in the development of a new CRM tool
- Web frontend development (Angular 17 with MDB-Bootstrap, microfrontends, DDD)
- Backend development (C# & .NET 7-9, MongoDB, MassTransit, RabbitMQ, Elasticsearch, microservices, DDD)
- Coordination with stakeholders & product owners
- Assisted in sprint planning
Holger Grittner
Last position:
IT at Holger Grittner Consulting
Discover over 15,000 top freelancers
Statistics of experts using Refactoring
Aggregated from the professional profiles of matched freelancers.
Experience
22 years (Germany: 18 years)
Position duration
2.6 years (Germany: 2.9 years)
Positions per freelancer
17 (Germany: 13)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Retail, Telecommunication
Certification focus areas
Information Technology, Business Intelligence, Product Development
Bachelor's degree or higher
75% (Germany: 89%)
Master's degree or higher
75% (Germany: 53%)
Doctorate
25% (Germany: 7%)
Certifications per freelancer
15 (Germany: 3)
Most common languages
English, German, Spanish
Speak two or more languages
100% (Germany: 96%)
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Dusseldorf are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Dusseldorf using Refactoring
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
What refactoring does
Refactoring means improving code structure without changing what the software does. It makes logic easier to read, test, and extend. Companies bring in refactoring specialists when a codebase has grown hard to maintain or risky to modify.
Where it helps
- Legacy applications with tangled logic
- Slow feature delivery caused by brittle code
- Repeated defects in the same modules
- Large migrations or framework upgrades
- Review cycles that keep exposing the same design issues
Skills that matter
Strong refactoring specialists understand design principles, testing, version control, and dependency management. They work carefully through small, safe changes and keep behavior stable. They also know when to stop refactoring and when a fuller redesign is the better choice.
Ecosystem and tools
Refactoring often sits inside Java, C#, JavaScript, Python, PHP, and similar stacks. Experts use unit tests, static analysis, linters, IDE inspections, and code review to guide the work. In Dusseldorf, this is common in product teams, enterprise systems, and internal platforms that need steady change.
When to bring in help
Teams usually call in freelance experts when an internal team is focused on delivery, but the codebase needs careful cleanup. It is also useful before a release, after a merger, or during a migration from an older architecture. A good specialist can work remotely or on-site, depending on the pace and access needed.
What good work looks like
Good refactoring is precise and easy to trace. The code becomes clearer, tests stay green, and the changes are small enough to review without guesswork. Strong professionals explain trade-offs clearly, protect existing behavior, and leave the system easier for the next expert to extend.
Frequently asked questions
Curious about Refactoring? Here are the answers that come up again and again.
Refactoring is used to clean up code without changing the software’s outward behavior. Companies rely on it to remove duplication, simplify logic, and make future changes safer. It is common when a system still works, but every new update feels risky.
Refactoring changes structure in small, controlled steps. A rewrite replaces more of the codebase and usually carries more delivery risk. Many teams choose refactoring first when the goal is to improve maintainability without restarting the system.
Yes, people often say refactor or code refactoring when they mean the same work. In practice, that usually means improving design, naming, boundaries, and testability. The goal is cleaner code, not new features.
A strong Refactoring specialist should be comfortable with testing, debugging, version control, and the language or framework in the codebase. They also need a good sense for architecture, dependencies, and API stability. Without those skills, cleanup can easily break behavior.
It depends on how fragile the system is. Small cleanup tasks can be handled by a broad range of specialists, but tangled legacy systems need someone who has worked through tests, interfaces, and shared modules before. The harder the codebase is to change, the more valuable deep refactoring experience becomes.
Yes, most refactoring work can be done remotely because the main inputs are code, tests, and review feedback. On-site time can help when teams need fast alignment, access to internal knowledge, or a shared session around a difficult module. In Dusseldorf, many companies use a mix of both.
Look for small commits, clear explanations, and a habit of protecting behavior with tests. A strong refactoring professional does not just change code style; they reduce complexity and keep the system easy to review. If the person can explain why each change was made, that is a good sign.
Teams usually ask for code refactoring when a module becomes hard to understand, releases slow down, or bugs keep returning in the same area. It is also common before a migration, after quick growth, or when a legacy system needs to stay alive longer. The warning sign is usually friction, not failure.
The average hourly rate of freelancers in Dusseldorf, Germany who have used Refactoring in their recent projects is 89 €, which corresponds to a daily rate of about 711 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used Refactoring in their recent projects, 75% hold at least a Bachelor's degree, 75% hold at least a Master's degree, and 25% hold a doctorate.
On average, freelancers in Dusseldorf, Germany who have used Refactoring in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 2.6 years.
The most common languages among freelancers in Dusseldorf, Germany who have used Refactoring in their recent projects are English (100%), German (90%), and Spanish (10%).
The most common industries among freelancers in Dusseldorf, Germany who have used Refactoring in their recent projects are Information Technology (100%), Retail (60%), and Telecommunication (60%).
The most common business areas among freelancers in Dusseldorf, Germany who have used Refactoring in their recent projects are Information Technology (100%), Product Development (80%), and Operations (60%).
Main locations of FRATCH Experts, who have recently used Refactoring
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin 
Hamburg 
Munich 
Frankfurt 
Stuttgart 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
