SQL Experts in Hamburg
in minutes from over 15,000 CVs with vetted, available specialists and AI matching.Hire experts who design clear queries, tune joins and indexes, and support reporting, data pipelines, and database migrations. They work across MySQL, PostgreSQL, SQL Server, and Oracle SQL with fast, precise matching from vetted, available freelancers.
Meet FRATCH Experts in Hamburg, who have recently used SQL
Niko Schmuck
Last position:
Developing Architect, Technical Lead "gridlytics" at HH Energienetze
- Building a data integration platform for high, medium, and low voltage assets for contextual analysis of time series with master data from the SCADA control system (IEC 60870 104), INIS, and SAP.
- Responsibility for the architecture and implementation of the solution, as well as sparring partner for the Product Owner.
- Use of Kotlin, Spring Boot, Maven, TimescaleDB, PostgreSQL, liquibase, Elements IoT, Docker, Kubernetes, Grafana, Python, jupyter, and various API gateways.
Arne Zühlke
Last position:
Managing Director and Shareholder at ARNESS GmbH & Co. KG
- Founded the company as a full-service consulting firm focused on purchasing and supply chain
- Commercial management of the company
- Digitalization and automation of work steps to reduce process costs
- Project management for optimization projects
- Connecting German companies with manufacturers abroad to achieve shorter delivery times and lower procurement costs at the same time
- Organizing B2B meetings between international companies
- Research on procurement markets (BestCostCountry) for the production of complex welded assemblies
- Taking on interim management assignments
Manfred Böttcher
Last position:
Interim Manager Managing Director
- Optimization of business results and expansion of sales activities
- Responsible for personnel organization
- Introduction of a document management system (DMS)
- Introduction and optimization of the ERP, CMS and CRM landscape
- Introduction of digital signatures
- Increase in revenue, reduction in costs and increase in EBIT
Huy Nguyen
Last position:
Modern Workplace & Dynamics 365 Consultant at Thinformatics
- Administration and further development of the M365 environment including Teams, Exchange Online, Intune and SharePoint Online
- Development of dashboards for performance monitoring using Microsoft Power BI
- Implementation of user requirements and processes with low-code/no-code technologies (Power Apps, Power Automate)
- Use of Jira and Azure DevOps to plan and implement user stories in an agile project context
- Participation in daily stand-ups, sprint planning, sprint reviews and retrospectives as technical point of contact
- Planning and implementation of security policies using Azure Conditional Access and multi-factor authentication
- Configuration and deployment of clients and applications via MECM (SCCM) and Baramundi
Guido Bäcker
Last position:
Independent Management Consultant and Interim Manager at BCTC Unternehmensberatung Guido Bäcker
Consulting, training, and coaching in the financial sector on strategy, organization, and IT topics
MorgenFund: Advising the operator of a fund platform on software selection for a sub-ledger "Cash Accounts" based on Virtual IBANs (VIBAN)
Structuring requirements, market screening, creating RfIs, communicating with vendors, and conducting the selection process
UniCredit/HypoVereinsbank: Workstream lead "Booking and Customer Reporting" in the payment transformation project "PULS"
Business analysis, creating business requirements and aligning solution items as part of the functional specification with the bank's IT service providers
Business analysis of SEPA CT and SWIFT MX (.camt, .pain, and .pacs formats), change management, team lead for a virtual team of fifteen line experts, and stakeholder management
equensWorldline Germany: Program management for three projects of the SWIFT service bureau (CBPR+, ESMIG, and Euro1Step1 migration) as part of the SWIFT MX migration
Managing individual project managers regarding overarching goals and requirements; reporting to internal and external committees and stakeholders; coordinating with dependent projects and programs
Project management/PMO: interim project management, stand-in for project managers, resource planning, budget and cost management, general PMO tasks
Daniel Sedlack
Last position:
Senior Software Engineer at energielenker solutions GmbH
- Designed and implemented a Python-based ETL pipeline with the Dagster framework to transform raw energy data from heterogeneous sources using InfluxDB and visualizations in Grafana
- Defined time-based and dependency-based jobs
- Deployed to managed Kubernetes clusters using Helm
- Integrated InfluxDB Cloud
- Prepared data for use in Grafana, including cleaning, normalization, and time-based resampling in Python
- Developed dashboards and visualizations in Grafana
- Developed unit tests with mocking using pytest
- Set up a CI/CD pipeline in GitLab
Technologies: Python, Dagster, InfluxDB, Grafana, pandas, pytest, REST, CI/CD, GitLab, Container, Kubernetes, Helm, Docker, Cloud
Anastasiia Komarenko
Last position:
Senior Test Automation Engineer at E.ON
- Reviewing functional and technical requirements from a testing perspective
- Creating test cases and automated tests to validate requirements
- Performing manual and automated functional, end-to-end, and regression tests
- Documenting test results and tracking defects
- Using models like GPT-4, BERT, and Hugging Face Transformers for automated test case generation, analysis of test results, and improving test coverage, including bias checks and security reviews
- Techs: MS Office, Jira, Zephyr, Confluence, Tosca, stakeholder communication, Agile, Kanban, Scrum, OpenAI API, Hugging Face, PyTorch, LangChain.
Vinod Goyal
Last position:
Freelancer: SAP MDG Consultant at Logistics service provider
- Support for one of the largest logistics service providers in handling ServiceNow tickets in the areas of SAP MDG, Business Partner (BP), customer and supplier master data
- Technical analysis and resolution of tickets through in-depth review of various database tables
- Creation and maintenance of accounting clerks in the system
- Deactivation of company codes using transports
- Carrying out mass changes with LSMW (Legacy System Migration Workbench)
Cornelius Höfig
Last position:
Solution Architect at STIHL
- Remodeling of the system architecture for an Azure-based platform aimed at rapid development of new functionalities
- Modeling of a staging concept for the fulfillment of diverse customer and QA needs
- Creation of requirements for, and oversight of, a proof-of-concept supplier project for a Flutter app with highly advanced BLE functionalities
- Comparison of multiple observability platforms for feasibility and requirements fit within the project environment
- Creation of a mobile app architecture based on domain-driven architecture
- Position of technical advisor and accountable solution architect for two development teams
- Execution of architecture reviews and alignment of changes with architectural expectations
- Skills & Technologies: Microsoft Azure , App Services, NodeJS Mono-repository, microservice architecture, domain driven design, self contained systems, requirements engineering, CI/CD, DevOps, API design, solution architecture
Darius Malekzadeh
Last position:
Global Head of E-Commerce at Believe SA
- Global P&L responsibility for direct-to-fan, e-commerce and merchandise, including onboarding regional markets and steering budget and resource allocation
- Managed an international team of more than 40 FTEs running all e-commerce activities for the company's various brands
- Implemented a global technology overhaul, replacing legacy systems and building and improving a Magento-based technology infrastructure
- Developed content, marketing and CRM strategies while continuously improving design and usability (UI, UX) with a focus on improving conversion rates
- Contributed to 25% year-over-year growth over two years and played an integral role in the 2021 relaunches
Michael Müller
Last position:
IT PROJECT MANAGER (MS Exchange) at Statutory Health Insurance on behalf of Randstad Digital Germany (formerly AUSY Technologies Germany)
Migration from Exchange 2016 to Exchange 2019 and Exchange Online, as well as the introduction of a backup solution and an archiving solution. The goal was a secure, compliant, and high-performance modernization of the email and archiving infrastructure.
Responsibilities as IT PROJECT MANAGER: Overall project management and operational control / Ensuring adherence to costs and resources / Ensuring achievement of project objectives / Ensuring compliance with regulatory requirements and compliance guidelines, including ISMS, ITIL, and data protection regulations / Preparing and delivering management reports for the project sponsors and project committee / Coordinating interdisciplinary teams from Exchange, network, data protection, and IT security / Planning and executing the system migration from Exchange 2016 to Exchange 2019 / Planning and executing the system migration from Exchange 2019 to Exchange Online / Planning and implementing a backup solution for Exchange Online / Coordinating an EU-wide tender for an archiving solution including market analysis with potential vendors / Planning and implementing an archiving solution for Exchange Online / Coordinating and preparing the necessary BAS notifications in the project context / Coordinating and aligning with stakeholders (e.g. business units, external service providers, and suppliers) for requirements definition and implementation
Technical environment: MS Exchange 2016, MS Exchange 2019, MS Exchange Online, MS Office, MS Planner, MS PowerPoint, MS Project, MS Teams
Marcus Bonfigt
Last position:
Data Engineer at Deutsche Bahn AG via Scoore GmbH
- Development of ETL pipelines with Talend (7/ Enterprise)
- Development/adaptation of database schema/database functions (PostgreSQL)
- Development of GIT CI pipelines
Technologies: Talend Enterprise, Git, PostgreSQL, Dbeaver, SQL, PL-SQL, Liquibase
Marc Matt
Last position:
Freelance Data Specialist at BrightlySoftware – A Siemens Company
- Migration of customer data from a private cloud to AWS
- Optimizing data transformation jobs and migration from Talend to AWS Glue
- Automation of all migration steps
- Used technologies: AWS, Python, Lambda, CloudFormation, SQLServer, AWS Stepfunctions, Glue, PySpark
Abdelrahman Hewala
Last position:
Research Assistant (WHK), FPGA Development – BrassSense Project at HAW Hamburg / Prof. Peter Schulz
- Real-time tone detection on FPGA (~20 ms latency target) using a filter bank architecture with a fuzzy-logic decision stage, avoiding FFT due to its window-length/frequency-resolution tradeoff.
- Responsible for system integration and architecture.
Rizwan Bashir
Last position:
Software Developer/Database/DevOps at Sutor Bank
- Migration and maintenance of a legacy system to the latest version of .NET for the asset management system
- Design and implementation of tests
- Creation of deployment pipelines and documentation
- Further development and implementation of change requests
- Technologies: C#, ASP.NET, Unit of Work, IOC, Three tier architecture, Entity Framework Core, DB First, Web API, Swagger, Open API, Monolith, Python, Oracle, Azure DevOps, GIT, xUnit, NSubstitute
- Methods: Agile development using Scrum
Discover over 15,000 top freelancers
Statistics of experts using SQL
Aggregated from the professional profiles of matched freelancers.
Experience
19 years
Position duration
2.3 years (Germany: 5.2 years)
Positions per freelancer
12
Top business areas
Information Technology, Project Management, Product Development
Top industries
Information Technology, Professional Services, Banking and Finance
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
89%
Master's degree or higher
53% (Germany: 59%)
Doctorate
8% (Germany: 9%)
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
94% (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 Hamburg 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 Hamburg 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
Query work
SQL is the language for asking databases for data, changing records, and shaping results for apps and reports. Strong specialists write clean SELECT statements, joins, CTEs, and aggregates that are easy to maintain and safe to run.
Database support
- Schema design and table structures
- Indexing and query tuning
- Stored procedures and views
- Data cleanup and migration scripts
This work appears in business systems, analytics stacks, and operational tools. In Hamburg, it often supports logistics, trade, media, and finance teams that need reliable access to data.
When to hire
Companies bring in freelance SQL specialists when queries slow down, a migration is risky, or reporting logic needs a clean rebuild. They are also useful when teams need extra hands for audits, schema changes, or work across several database systems.
What good experts do
Good professionals understand execution plans, locking, transactions, normalization, and data integrity. They do not just make a query work; they make it readable, testable, and safe for production use.
Ecosystem fit
SQL rarely stands alone. Skilled specialists also work with PostgreSQL, MySQL, Microsoft SQL Server, Oracle Database, and tools around ETL, BI, and database administration. They know how to adapt the same logic to different dialects without breaking business rules.
Delivery focus
Common deliverables include reporting queries, migration scripts, performance fixes, and support for dashboards or APIs that depend on data access. For Hamburg teams, remote work is often enough, but on-site sessions help when systems are sensitive, legacy-heavy, or tightly linked to local stakeholders.
Frequently asked questions
Before you brief your next project: the most common questions about SQL.
SQL is used to read, filter, join, update, and summarize data stored in relational databases. Companies rely on it for reporting, application back ends, data cleanup, and migration work. It is also the base language behind many analytics and business intelligence workflows.
SQL is the shared language for relational data, while MySQL, PostgreSQL, and SQL Server are database systems or dialects built around it. In practice, the choice depends on the database engine, the data model, and the features the project needs. A strong specialist knows both the core language and the dialect-specific differences.
A strong SQL specialist usually understands data modeling, indexing, transactions, and query performance. Many also work with ETL tools, BI platforms, scripting in Python or PowerShell, and version control for database changes. Those skills help when the work goes beyond a single query.
For SQL, you should share the database system, the main tables, the business goal, and any slow or failing queries. Good context also includes sample data shapes, expected output, and constraints around downtime or access. That lets the specialist estimate the work and avoid rework.
Most SQL work can be done remotely because the tasks usually center on queries, schemas, and scripts. Remote collaboration works well when access is clear and the team can share test cases, logs, and database snapshots. On-site help can still be useful for sensitive systems or workshop-style cleanup sessions.
Look for clear reasoning, not just working queries. A strong SQL expert explains why a join, index, or transaction choice is safe, and they can point to execution plans, edge cases, and rollback options. Clean formatting and consistent naming are also good signs.
Yes, SQL remains central in most data stacks because databases, warehouses, and many BI tools still depend on it. Even when teams use dbt, dashboards, or orchestration tools, SQL often holds the core business logic. That makes skilled specialists valuable for both legacy and modern systems.
For SQL, Hamburg companies often need reporting support, migration scripts, performance fixes, or help cleaning up legacy queries. The work may touch logistics, trade, media, or finance systems, where stable data access matters. A good specialist delivers practical changes that fit the team’s database and release process.
The average hourly rate of freelancers in Hamburg, Germany who have used SQL in their recent projects is 99 €, which corresponds to a daily rate of about 794 € based on an 8-hour working day.
Of the freelancers in Hamburg, Germany who have used SQL in their recent projects, 89% hold at least a Bachelor's degree, 53% hold at least a Master's degree, and 8% hold a doctorate.
On average, freelancers in Hamburg, Germany who have used SQL in their recent projects have 19 years of professional experience, with a single engagement typically lasting around 2.3 years.
The most common languages among freelancers in Hamburg, Germany who have used SQL in their recent projects are German (99%), English (94%), and French (18%).
The most common industries among freelancers in Hamburg, Germany who have used SQL in their recent projects are Information Technology (81%), Professional Services (48%), and Banking and Finance (44%).
The most common business areas among freelancers in Hamburg, Germany who have used SQL in their recent projects are Information Technology (95%), Project Management (71%), and Product Development (70%).
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.
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Munich 
Cologne 
Frankfurt 
Stuttgart 
Dusseldorf 
Leipzig 
Dortmund 
Essen 
Bremen 
Dresden 
Hanover 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
