Microsoft SQL Server Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used Microsoft SQL Server
Hooman B.
Last position:
Fullstack Developer at Möbel Roller GmbH
- Further development of the existing e-commerce platform based on SAP Commerce (Hybris) to meet the growing demands of digital commerce.
- Ensuring the scalability and performance of the backend, so the platform remained stable and efficient even under heavy user load.
- Development and integration of new OCC REST APIs and services for modular extensions and flexible adjustments, to implement new features quickly.
- Optimization of data flows and interfaces, which significantly improved platform efficiency and system performance.
- Ensuring a maintainable and scalable code base by using Clean Code principles, proven design patterns, and a future-proof architecture.
- Reduction of errors through extensive testing with JUnit, Mockito, and load tests with Gatling, supported by the introduction of automated test processes.
- Improved system performance through targeted refactoring measures and efficient database queries, especially to handle peak loads.
- Use of modern cloud and monitoring tools such as Kubernetes, Google Cloud Platform (GCP), and Grafana to ensure a stable and monitored infrastructure.
- Clear improvement in efficiency, scalability, and reliability of the platform, which now meets the demands of a dynamic and growing e-commerce market.
Henning U.
Last position:
Senior Expert Data Governance, Master Data Quality and Data Migration at E.ON
- Planning and implementation of a migration strategy for master and transaction data for the continuous loading of a cloud-independent database
- Creation and pilot implementation of a company-wide Business Data Model for customers, suppliers, contracts, products, prices, consumption, invoices, and dunning
- Concept and consulting for a Data Governance Framework incl. definition of committees, roles, processes, and metadata model
- Operationalization of the Data Governance Framework with definition of data standards
- Sub-project management in two pilot projects (PoCs) for Data Governance systems (ErwinDIS and Atlan)
- Training and coaching the data team in migration, data quality, and data modeling
Markus B.
Last position:
Consultant, Technical Project Manager at Lanxess
- Project: ESU Windows and SQL Server consolidation / Configuration Management in ServiceNow
- Creation of an as-is analysis of all servers worldwide
- Creation of an as-is analysis of all SQL servers worldwide
- Creation of requirements analyses for SQL and server migrations
- Coordination of requirements with partners for migrations to Hyper-V (on-premises) or Azure Cloud
- Moderation of jour fixe meetings
- Creation of roadmaps and solution models for server migrations
- Setup of test scenarios
- Moderation of workshops for the introduction of a Global Admin Team
- Creation of data models (CMDB) in ServiceNow
- Conducting workshops for the CMDB data model
- Creation of solution models for the CMDB
- Creation of seamless configuration and work documentation for the CMDB
- Creation of reports for license management
- Creation of KPIs for data quality in ServiceNow
- Creation of a service catalog
- Moderation of workshops for creating service requests
- Interface between needs analysis and ServiceNow development team
- Systems used: Windows 7, Windows 10, Microsoft Office 365/2010, Windows Server 20xx, SQL Server 20xx, SharePoint, Azure Cloud, Hyper-V, ServiceNow, various tools
Christoph S.
Last position:
Test Manager at Logistics
- Coordination and planning, execution, documentation, and analysis of test cases
- Development of test concepts considering best practices (e.g., test pyramid) with a focus on reliable, automatable test runs
- Implementation and maintenance of test cases according to the test concepts
- Technologies: Citrix Workspace, Shopify, Jira, Xray, MS Teams, MS SharePoint, Confluence, MS Office 365
Alexander B.
Last position:
Senior Data Engineer at RWE AG
Architected and maintained data products for renewable energy operations, covering wind turbine, grid-meter, and weather data. Built scalable ETL/ELT pipelines in Azure Databricks using Delta Lake (bronze/silver/gold layers) and processed data in various formats, including structured and semi-structured data. Contributed to a data quality framework supporting table and column documentation, outlier detection, and completeness metrics across all datasets within a data product. In addition, implemented a DORA KPI Databricks dashboard used across all data products. Optimized CI/CD processes in Azure DevOps to streamline deployment across development, test, and production environments.
Technology stack: Azure Databricks, PySpark, SQL, Delta Lake, Unity Catalog, Azure Data Lake, APIs, Dremio, Azure DevOps, YAML, Git, Databricks Workflows, Application Insights, Terraform, OpenAI API, Codex, LLM-assisted workflows
Yaroslav S.
Last position:
Senior Low-Code Consultant at Freelancer
Structured analysis and evaluation of business processes
Gathering, documenting, and prioritizing requirements
Creating business-friendly and technically executable process models
Use of Camunda tools
Deriving requirements and interfaces from BPMN diagrams
Coordination with stakeholders and business units
Translating business requirements into technical solution designs
Implementing efficient and tailored applications
Systematic collection, analysis, and documentation of requirements
Prioritizing and validating requirements in close collaboration with stakeholders
Alignment between business and development to ensure shared objectives
Creating use cases, user stories, and acceptance criteria
Continuous requirements and change management throughout the project lifecycle
Define project goals and create project plans
Delegate tasks and monitor project progress
Monitor budgets and inform stakeholders
Mendix: Architecture, development, and maintenance of custom applications (Microflows, Domain Model, Security, XPath)
Modeling Mendix workflows for process optimization
Develop scalable apps with Mendix including REST/SOAP integration with SAP, SQL, Azure & SharePoint
UI design for Mendix using Atlas UI, Fluent UI, HTML, CSS, JavaScript
Develop web & mobile apps with Mendix using agile methods (Scrum, Kanban)
Implement business logic with Mendix Microflows and Nanoflows
Performance optimization and architecture improvements for Mendix applications
Conduct Mendix training
Create technical documentation and best practices for Mendix
Coaching and mentoring for low-code development with Mendix
Pierre G.
Last position:
Ansible Automation, Windows Third Level Support at DB InfraGO AG
- PRISMA project
- Ansible automation
- Windows third-level support for Windows NT, Windows 2000, Windows 2013, Windows 2016, Windows 2019
Rainer L.
Last position:
Senior IT Consultant, Senior Software Architect, Senior Software Developer, Senior DevOps Engineer at Techniker Krankenkasse
Automation of the database major / minor releases for the TKeasy project
Concept for database major / minor release automation
As-is analysis
Evaluation of Redgate Flyway functionality
Concept creation
Products: Redgate Flyway, GitHub, Quest, Erwin Data Modeller, Oracle, Atlassian Jira, Atlassian Confluence
Skills: Docker, Continuous Delivery, Continuous Integration, Redgate Flyway, Major Releases, Minor Releases
Johannes W.
Last position:
Senior Data Engineer at Soorce GmbH
- Analysis of business requirements
- Integration of different data sources such as ERP systems, production systems, and external data sources
- Implementation of load processes and processing logic with MSSQL
- Data modeling and optimization of data models
- Setting up data quality management incl. data profiling with dynamic programming
- Support in designing and establishing data governance, especially in the areas of data quality management and data protection
- Support in developing BI solutions with Tableau to help decision-making processes
Hüseyin A.
Last position:
Business Analyst at Niedersächsisches Ministerium für Inneres, Sport und Digitalisierung
- Responsibility, also as rollout manager, for the successful transition of a basic OZG platform into the client's standard operations by planning and implementing measures along Service Transition and Service Operation according to ITIL, including workshops in a SAFe environment with more than 40 operational stakeholders
- Building and maintaining cross-organizational stakeholder relationships by organizing and running various information sessions on technical configurations and user guides (platform and EfA services)
- Designing and improving various operational and project documents such as the ITIL operations manual, OLA, SLA, service support concept and rollout instructions
- Modeling project-based processes according to BPMN 2.0, EPK and UML related to OZG services with the goal of integrating them into the operational e-government process landscape (SOA)
- Coordinating operational stakeholders and KPI reporting to the project management team using agile methods according to SAFe
- Tech stack / tools: Microsoft 365 (SharePoint, OneNote, Outlook, Teams), Skype for Business, Cisco Webex, ADONIS, MindManager, Jira, Confluence
Stefan M.
Last position:
Bundesrechtsanwaltskammer
- Design, planning and execution of complex acceptance tests for a document exchange platform for the German justice authorities.
- Validation of decrypted and certificate-based message exchange via web platform, mobile app, and Java API.
- Documentation of test cases, execution steps, and test results.
- Technologies: Windows 11/10, Ubuntu, iOS, Android, Bash for Windows, Java 17, IntelliJ, Git, Jira, Confluence, Citrix Server, xJustiz standard implementation, specific justice software.
Alexander R.
Last position:
Business Analyst at Financial Services Provider Landesbank
The Helaba ATLAS project aims to modernize core systems and make them future-proof. As part of the subproject, the existing legacy system for international payments is being replaced by a modern web-based application.
- Analysis of functional and technical requirements
- Analysis and optimization of business processes
- Process modeling
- Preparation and facilitation of workshops
- Defining project scope and prioritizing requirements
- Business process management (analysis, modeling, and optimization)
- Specification of user stories
- Designing business and authorization concepts
- Testing and acceptance
- Designing mockups in Figma
- Creating the UI/UX style guide for web applications Approach: Scrum (agile) Technologies: Jira, Confluence, MS Teams, Conceptboard, Java, Vaadin, Figma
Emmanouil T.
Last position:
Senior Analytics Engineer at Trade Republic Bank GmbH
- Implementation of analytics and automation solutions for the Anti Financial Crime business unit
- Providing the infrastructure, including reusable data models and feature ingestion for production ML and rule based models in the areas of Account Take-Over and Card fraud detection, as well as Customer Risk Assessment
- Tools used: Snowflake, dbt, Looker, AWS, Python, Airflow, Metaflow
Markus G.
Last position:
Full Stack Developer at REWE Digital
- A warehouse valuation system was reimplemented using Java, Spring Boot, and Camunda. The backend solution focuses on integration and batch calculations, the frontend on managing formulas and reviewing results.
- Java 21
- Spring Boot
- JPA
- Maven
- REST
- Kafka
- PostgreSQL
- DB2
- Liquibase
- Google Cloud Storage
- Keycloak
- GitLab CI/CD
- Helm
- Terragrunt
- SonarQube
- Angular
- IntelliJ
- JUnit 5
- Mockito
- Open API
Christian H.
Last position:
Developer at Opereon Consulting GmbH
- Developed a shop website
- Integrated an AI language model
- Developed tools for AI-powered webhooks
- Technical tools: REACT.js; Elevenlabs; MCP; n8n; HTTP
Discover over 15,000 top freelancers
Statistics of experts using Microsoft SQL Server
Aggregated from the professional profiles of matched freelancers.
Experience
21 years (Germany: 23 years)
Position duration
3.4 years (Germany: 3.1 years)
Positions per freelancer
16 (Germany: 15)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Manufacturing
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
92% (Germany: 85%)
Master's degree or higher
64% (Germany: 49%)
Doctorate
4% (Germany: 7%)
Certifications per freelancer
4 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
97% (Germany: 96%)
Based on our profile pool as of 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Cologne 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.
Discover detailed Microsoft SQL Server rate benchmarks:
Explore rate insightsAverage rates of experts in Cologne using Microsoft SQL Server
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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Microsoft SQL Server experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (85%)
- Banking and Finance (56%)
- Manufacturing (47%)
- Professional Services (47%)
- Transportation (41%)
- Automotive (38%)
- Insurance (38%)
- Government and Administration (35%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Relational Database Engine for Enterprise Workloads
Microsoft SQL Server provides transaction processing, high-volume operational storage, and business intelligence capabilities. Often called MS SQL or SQL Server, this relational database management system powers backend architectures in media, retail logistics, and manufacturing across the Cologne and Rhineland regions.
T-SQL Development, High Availability, and Core Tooling
- Writing efficient Transact-SQL procedures, triggers, views, and functions
- Configuring Always On Availability Groups and failover clustering instances
- Creating enterprise data integration pipelines with SQL Server Integration Services
- Managing schema deployments and server profiles in SQL Server Management Studio
- Modernizing on-premise instances into hybrid cloud setups using Azure SQL Database
Resolving Performance Bottlenecks and Execution Issues
Specialists address locking, blocking, and deadlocks in transactional systems. They evaluate execution plans, missing index recommendations, and query statistics to prevent latency during traffic surges. External expertise ensures query workloads scale predictably across multi-core server hardware without resource saturation.
Enterprise Deployments Across Cologne Organizations
Regional enterprises in Cologne often connect MS SQL deployments to ERP platforms, CRM systems, and accounting tools. While day-to-day tuning runs smoothly remotely, local organizations frequently request specialists on-site during cutover phases, major version upgrades, or audits that require direct collaboration with in-house infrastructure teams.
When Organizations Require External Database Expertise
- Severe query degradation during end-of-month financial closing runs
- Migrations between legacy server releases and modern containerized instances
- Designing disaster recovery plans with strict recovery point and time objectives
- Setting up reporting cubes and analytical pipelines via SSAS and SSRS
Characteristics of Senior Database Professionals
Accomplished specialists understand internal storage structures, transaction log architecture, and buffer pool mechanics. They isolate problematic queries using Extended Events instead of deprecated SQL Profiler traces. Their implementations follow strict security controls, including transparent data encryption, dynamic data masking, and granular access privileges.
Frequently asked questions
The facts hiring teams ask for most often when it comes to Microsoft SQL Server.
Companies engage a Microsoft SQL Server specialist to resolve slow query execution, configure enterprise backup policies, and automate ETL data ingestion. They also manage database consolidation projects and implement high-availability architectures like Always On Availability Groups to eliminate operational downtime.
While PostgreSQL is open source and highly extensible, MS SQL delivers integrated enterprise services such as SSIS, SSRS, and deep alignment with Active Directory out of the box. Organizations running proprietary business software or heavy Microsoft ecosystems prefer SQL Server for its commercial support and unified administration tooling.
An effective SQL Server professional demonstrates deep expertise in T-SQL optimization, indexing methods, execution plan analysis, and wait statistic debugging. Practical familiarity with PowerShell automation and storage tiering ensures the environment remains resilient and maintainable.
Most monitoring, indexing, and T-SQL development for Microsoft SQL Server occurs smoothly through secure remote connections. However, companies in Cologne often request hybrid collaboration during major hardware migrations, disaster recovery simulations, or sensitive compliance reviews.
Significant structural shifts such as moving legacy databases to modern cloud targets require senior MS SQL specialists. They must manage cross-version breaking changes, assess index fragmentation patterns, and coordinate cutovers without prolonged downtime for active users.
A capable SQL Server expert inspects wait statistics, index usage metrics, and compilation plans using dynamic management views and Extended Events. Rather than simply adding memory, they resolve the underlying root cause through index tuning, query rewrites, or partitioning schemes.
For organizations in the Cologne area, database documentation, scripts, and server configurations use English standard naming conventions. However, strong German language skills are frequently valuable for communicating architectural requirements across cross-functional operations teams and local compliance officers.
A senior Microsoft SQL Server professional understands internal engine architecture, including concurrency models, tempdb contention, and latching behavior. Junior practitioners focus on basic schema adjustments, whereas senior experts design secure, automated, and scalable database foundations that withstand critical failures.
The average hourly rate of freelancers in Cologne, Germany who have used Microsoft SQL Server in their recent projects is 98 €, which corresponds to a daily rate of about 783 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Microsoft SQL Server in their recent projects, 92% hold at least a Bachelor's degree, 64% hold at least a Master's degree, and 4% hold a doctorate.
On average, freelancers in Cologne, Germany who have used Microsoft SQL Server in their recent projects have 21 years of professional experience, with a single engagement typically lasting around 3.4 years.
The most common languages among freelancers in Cologne, Germany who have used Microsoft SQL Server in their recent projects are German (100%), English (97%), and French (21%).
The most common industries among freelancers in Cologne, Germany who have used Microsoft SQL Server in their recent projects are Information Technology (85%), Banking and Finance (56%), and Manufacturing (47%).
The most common business areas among freelancers in Cologne, Germany who have used Microsoft SQL Server in their recent projects are Information Technology (100%), Product Development (74%), and Quality Assurance (68%).
Main locations of FRATCH Experts, who have recently used Microsoft SQL Server
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.
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Munich 
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Stuttgart 
Dusseldorf 
Leipzig 
Dortmund 
Essen 
Dresden 
Hanover 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
