SQL Experts in Essen
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Meet FRATCH Experts in Essen, who have recently used SQL
Alwin G.
Last position:
IT Interim Manager & AI Strategist
- AI product development: Design of an AI-supported GRC platform to automate compliance processes.
- AI expertise: Strategic deepening in Agentic AI and GenAI as a core asset for modern IT governance
- IT interim management and strategic consulting
Fadi Shoaa
Last position:
Development of a production-ready Enterprise Document AI & Recommendation Platform at Freelancer
- Development of a production-ready Enterprise AI solution for the automated processing of invoices and business documents
- Integration of Azure AI Document Intelligence and LLM technologies into existing business processes
- Development of robust REST APIs for automated document processing and system integration
- Extraction, validation, and storage of structured invoice data in Azure SQL as a base for analytics and machine learning models
- Development of an AI-based recommendation engine with machine learning and deep learning to generate personalized product recommendations based on historical purchase data
- Implementation of logging, monitoring, error handling, and validation mechanisms for stable production use
- Collaboration with business teams to define business rules and integrate the solution into existing enterprise processes
Technologies: Python, Azure AI Document Intelligence, Azure OpenAI, Azure SQL Database, REST APIs, Machine Learning, Deep Learning, OCR, Pandas, JSON, Workflow Automation
Rudolf Eggelbusch
Last position:
Datacenter Engineer, Network & Security Administrator at International insurance group
Operation and further development of the network and security infrastructure.
Monitoring, analysis and resolution of network and security incidents.
Cross-department collaboration with other specialist teams for operations, further development and reporting.
Firewall vulnerability analysis.
Firewall rule approvals.
Troubleshooting IP communication issues in the network and firewall infrastructure.
Security-critical IT infrastructure, processing of personal data, compliance with legal regulations.
Products: Palo Alto Networks Firewalls, Cisco ACI, Checkpoint Firewalls, F5
Technologies: SDN, SDWAN, Cisco EPIC, Cisco ACI
Boris Solos
Last position:
Generalist expert for software development at Mercor
- Training the AI models, evaluating images and texts for UI/UX, turning the provided data into insights via OpenAI Feather as part of the machine learning workflow
Technologies: OpenAI Feather
Hervé Teguim
Last position:
Senior Data Engineer at Schweizerische Post AG
Tools: Fabric, AWS, dbt, Power BI, SQL, DWH, R, Python
- Supported customers in implementing an architecture design for extracting and preparing data
- Planned the design and implementation of the BI and DWH platform
- Ensured the scalability and performance of the data platform
Jens Schneeweiß
Last position:
Network Technology at ISP, Internet Service Provider, BGP Peering
- Optimization of the transmission media of the data links in the Ruhr area
- Configuration/expansion of switches and routers for an autonomous system AS
- Improve the network protocols used Layer 2/3 (OSI model), RSTP, broadcast, etc.
- Laying cables, crimping, antennas, routers, switches
- Maintenance, expansion, selection and prioritization of troubleshooting measures for network monitoring (PRTG, The Dude)
- Organization and new connection of another BGP peering, data center, NGN fiber optic
- VPN IPSec site connections for 6 sites with PFSense, Fritzbox
- Configuration of WLAN devices (Mikrotik, UBNT
Label: TCP/IP, VLAN, BGP, OSPF, MPLS, VPLS, routing protocols, WLAN, EoIP, PPPoE, routing, SNMP, DHCP, DNS, NAT, native IP, VLAN, Ethernet, VoIP., switches and routers from: Nortel, Cisco, MikroTik, UBNT., network management systems: The Dude, PRTG, UISP
Henok Abraham
Last position:
Founder and Managing Director at Afworki GmbH IT-Consulting
The goal of Afworki GmbH IT-Consulting is to make small and medium-sized companies more competitive by overcoming challenges in digitalization, automation, and data management.
Tailored technology, strategy, and specialist consulting designed to meet the individual needs of each company.
Analyzing the company's current situation and developing the best possible solution together with the client.
Using both agile and classical IT project management methods to deliver projects on time and within budget.
Focusing on automating and orchestrating all data flows in a data warehouse to create a unified and standardized data foundation.
Considering the dependencies between IT and business to achieve sustainable positive effects.
Employing modern strategies and tools specifically tailored to the company's needs.
Supporting digitalization, the introduction of agile working methods, and the creation of up-to-date reports and analyses.
Objective: streamlining management and enabling well-founded, data-driven decision-making.
Adem Susam
Last position:
IT Consultant (Test Manager) & CEO at Trikolon Consulting GmbH
- Development and implementation of test concepts for complex, multi-layered systems
- Creation of regular management reports and presentations for stakeholders and clients
- Technical and disciplinary leadership of international test teams (coordination, coaching, resource planning)
- Responsibility for quality assurance across multiple test levels (unit, integration, system, and acceptance tests)
- Design of test cases and test plans in Azure DevOps; ensuring traceability and coverage
- Use of BDD approaches (Gherkin/Cucumber) to prepare test automation
- Building a test automation architecture with Playwright and integrating new tests into CI/CD pipelines
- Performing API tests (REST) and tests for mobile/PWA applications
- Setup and maintenance of test environments across multiple stages (integration, QA, UAT, pre-production)
- Test data management (synthetic and production-like data), ensuring consistency and reproducibility
- Collaboration with DevOps teams for containerization (Docker/OpenShift) and CI/CD integration
- Working under SAFe & Scrum, closely coordinating with product owners and DevOps teams
- Active participation in PI plannings, sprint reviews, and retrospectives
- Promoting an agile QA culture through coaching and knowledge sharing
- Introducing scalable test automation with Playwright → significant reduction of manual testing efforts
- Increasing test transparency through clean defect and reporting management in Azure DevOps
- Improved release quality through an end-to-end QA strategy and automated regression tests
- Strategic leadership of Trikolon Consulting GmbH and responsibility for finance, personnel, and business development
Asım Yurduseven
Last position:
Freelance BI/DWH/ETL Specialist at Akbank
- Setting architectural standards for Informatica Power Center development teams
- Maintenance-performance-health for DWH (Exadata) environments
- Qlik Sense / BO reports architectural standards
- Implementing best practices in ETL tasks
- Documentation ETL standards on Confluence
- Dynamic Data Masking rules for GDPR/KVKK regulations by using Informatica DDM tool
- DWH Data model Power Designer
- Upgrade Qlik Sense versions
- Merge all Informatica server's repository databases on one Oracle DB
Mugisha Enock
Last position:
Freelancer Business Data Analyst at Study Boundless
- Manage WordPress websites, ensuring SEO-friendly structures and high-performance functionality
- Create and optimize Google Ads campaigns, leveraging data to enhance conversion rates and ROI
- Develop Looker Studio & Power BI dashboards to track customer behavior, sales trends, and digital performance
- Implement Google Tag Manager (GTM) and Google Analytics (GA4) to enable precise event tracking and reporting
Ahmet Cavus
Last position:
Senior Android Developer at enbw
- Support in restructuring and designing the group's internal Android apps
- Defining essential modules and implementing accessible components
- Establishing agile approaches at an international level
- Technologies & Methods: Kotlin, Android, JUnit 5, Koin, Azure DevOps, Android Studio, Git, Jetpack Compose, Coil, Flow API, Ktor, Coroutines, TypeScript, Node.js
Thomas Martin
Last position:
Managing Partner, Transformation Consultant at THRIVE8
- Established and led the Enterprise PMO to increase the growth of a security provider in Germany
- Introduced SAFe in portfolio configuration to scale production for a security provider in Germany
- Built ESG performance management and defined KPIs for an energy company in Germany
Andreas Adam
Last position:
IT-Application Manager at IHK-GfI
- Gathering, analyzing, specifying, and prioritizing requirements for the 'Archive and Delete' module of the Chambers of Industry and Commerce in a Scrum team
- Capturing and specifying screen/form designs, functionality, and data types in Confluence, as well as creating user stories in Jira
- Preparing PowerPoint presentations for the 'Archive and Delete' module
- Coordinating and supporting the Chambers of Industry and Commerce in the implementation of the module
- Writing SQL scripts for an Oracle database
- Technologies used: Scrum, Confluence, Jira, MS Office, Postman, JavaScript, REST API, JSON, DBVisualizer, SQL
Ateet Bahmani
Last position:
AI Engineer at MASX AI
Strategic transition into AI Engineering through intensive mentoring and project execution.
Developed MASX AI, an agentic AI platform integrating LangGraph, AutoGen, and RAG for geopolitical forecasting and real-time ETL.
Designed and delivered functional AI prototypes for prospective clients showcasing applied expertise in multi-agent systems, real-time data pipelines, and LLM integrations.
Dirk Raske
Last position:
IT Operations / Service Management at Grant Thornton AG
- Support for the transition to the provider
- Quality assurance in developing operations manuals
- Operational performance management of the provider
Discover over 15,000 top freelancers
Statistics of experts using SQL
Aggregated from the professional profiles of matched freelancers.
Experience
20 years (Germany: 19 years)
Position duration
2.1 years (Germany: 5.2 years)
Positions per freelancer
14 (Germany: 12)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Manufacturing
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
84% (Germany: 89%)
Master's degree or higher
54% (Germany: 59%)
Doctorate
5% (Germany: 9%)
Certifications per freelancer
4 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 97%)
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 Essen 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 Essen using SQL
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
SQL in practice
SQL, or Structured Query Language, is the standard way to read, change, and manage data in relational databases. Companies use it to power reporting, product data, operations, and internal tools. Strong SQL experts write clear queries that return the right data and keep systems easy to maintain.
Common work
- Querying business data for dashboards and reports
- Creating and updating tables, views, and indexes
- Writing stored procedures and reusable database logic
- Cleaning, joining, and validating data from multiple sources
- Supporting migrations between database systems
Tools and ecosystems
SQL work often sits around PostgreSQL, MySQL, Microsoft SQL Server, and Oracle Database. In real projects, specialists also use tools such as DBeaver, SSMS, pgAdmin, and ETL or BI tools that depend on well-structured queries. The best professionals understand how the database engine behaves, not just how to write syntax.
When companies need help
Teams bring in SQL freelancers when reporting is slow, queries are hard to trust, or a database has grown messy over time. It also helps during migrations, audits, incident fixes, and new product launches. In Essen, this is common for industrial, logistics, and service environments that rely on accurate data and clear collaboration.
What strong specialists do
Strong SQL professionals read existing schemas quickly, spot bottlenecks, and ask the right questions before changing production data. They write queries that are correct, maintainable, and safe for large datasets. They also document assumptions so other specialists can work with the same logic later.
Working with the right expert
SQL projects need different depth depending on the task. A simple reporting fix needs clean query skills, while a migration or performance issue needs experience with indexing, execution plans, and data modeling. Remote work is common, but on-site collaboration in Essen can help when teams need fast access to internal systems or close work with business stakeholders.
Frequently asked questions
Not sure where to start with SQL? These answers cover the essentials.
SQL is used to query, update, and structure data in relational databases. Companies rely on it for reports, dashboards, application back ends, data cleanup, and operational checks. It is also the language behind many analytics and integration workflows.
SQL is the right choice when the work lives in a database and needs precise, repeatable queries. Python is better for complex transformation logic, automation, or advanced analysis, while no-code tools are useful for simpler workflows. In many projects, SQL sits at the core and the other tools build around it.
A strong SQL specialist usually knows more than one database engine, because syntax and behavior differ. PostgreSQL, MySQL, Microsoft SQL Server, and Oracle Database are the most common environments. Knowledge of indexes, transactions, and query plans matters as much as the query language itself.
Good SQL work often depends on data modeling, performance tuning, and understanding how applications read and write data. Many projects also benefit from familiarity with ETL, BI tools, version control, and basic scripting. Communication matters too, because business teams often need the logic explained in plain words.
A simple reporting task may only need a SQL specialist who writes clean queries and checks the results carefully. A migration, security review, or slow database investigation needs deeper experience with execution plans, indexing, and data integrity. The more production risk involved, the more important proven project work becomes.
Most SQL tasks can be handled remotely if access, security, and communication are set up well. On-site work in Essen can help when teams need quick workshops, sensitive internal data handling, or close alignment with operations. The best setup depends on the system, the stakeholders, and the review process.
Look for a SQL specialist who explains trade-offs clearly, writes queries that are easy to review, and checks edge cases instead of only happy paths. Good signs include clean joins, careful use of indexes, and an understanding of how changes affect production data. Ask for examples of similar database work and how they validated results.
SQL is the standard language for working with relational data. T-SQL is the Microsoft SQL Server variant, and PL/SQL is Oracle's procedural extension. A specialist who knows the core language can usually adapt faster, but platform-specific work often needs experience with the exact database dialect.
The average hourly rate of freelancers in Essen, Germany who have used SQL in their recent projects is 90 €, which corresponds to a daily rate of about 717 € based on an 8-hour working day.
Of the freelancers in Essen, Germany who have used SQL in their recent projects, 84% hold at least a Bachelor's degree, 54% hold at least a Master's degree, and 5% hold a doctorate.
On average, freelancers in Essen, Germany who have used SQL in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 2.1 years.
The most common languages among freelancers in Essen, Germany who have used SQL in their recent projects are German (100%), English (100%), and French (24%).
The most common industries among freelancers in Essen, Germany who have used SQL in their recent projects are Information Technology (83%), Banking and Finance (59%), and Manufacturing (56%).
The most common business areas among freelancers in Essen, Germany who have used SQL in their recent projects are Information Technology (90%), Product Development (66%), and Project Management (66%).
Main locations of FRATCH Experts, who have recently used SQL
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 
Cologne 
Frankfurt 
Stuttgart 
Dusseldorf 
Leipzig 
Dortmund 
Bremen 
Dresden 
Hanover 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
