SQL Experts
in minutes from over 15,000 CVs with the power of AIHire experts who design reliable data models, tune complex queries, and build reporting or integration solutions across MySQL, PostgreSQL, SQL Server, and cloud data services. FRATCH matches you quickly and precisely with vetted, available freelancers.
Meet FRATCH Experts who have recently used SQL
William N.
Last position:
Power BI Solutions Architect/Engineer & AI Consultant at AVERDUNG GmbH
- Redesign of the company’s BI infrastructure: replacement of a fragmented landscape of manually maintained Excel solutions and CSV imports with a centralized Power BI environment using a unified data model as the company-wide single source of truth
- Consolidation of previously isolated reporting logic in a central semantic model – elimination of redundant files, manual data transfers and inconsistent metrics across departments
- Forecasting & Planning: Design and implementation of company-wide liquidity planning in Power BI – from business logic to a fully automated, data-source-driven planning model replacing the previous manual Excel process; enabling rolling forecasts and continuously up-to-date cash flow transparency for management
- Optimization of existing Power BI dashboards in terms of performance, structure and analytical value using an AI-native approach
- Analysis and improvement of the data model, including data quality analyses, data cleansing and consistent modeling using Star Schema, DAX and Power Query
- Incident & Anomaly Analysis: Identification, investigation and explanation of data anomalies, including root-cause analysis and specific recommendations for action
- AI Solution Architecture: Connecting Business Central and Power BI to LangDock via MCP (Model Context Protocol) for AI-supported data usage
- Development of a historical data layer as a basis for trend and time-series analyses
- AI-supported automation: Design and development of AI skills, agents, loops and processes for the automated analysis and interpretation of reports
- Automated reporting workflow: Setup of scheduled, automated email delivery of AI-generated analyses and recommendations to stakeholders
- Gathering and documentation of business requirements and coordination with business departments and IT as part of requirements engineering / product owner activities
- Breaking down overall requirements into clearly defined work packages and tasks
- Definition, prioritization and management of milestones throughout the entire project lifecycle
Tools: POWER BI, M365, Copilot Studio, MIRO, Microsoft Business Central, Microsoft Fabric, Claude AI, ChatGPT, LangDock, MS VS Code
André G.
Last position:
Financial Reporting Consultant at Client anonymized (services sector)
Financial reporting as an MVP. Follow-up assignment.
- Reports on profit and loss, balance sheet and cash flow
- Budget and personnel metrics (FTE)
- Implementation as an MVP with a fixed scope
Alwin G.
Last position:
IT Interim Manager & AI Strategist
- Founder of CheironX: AI-supported GRC management (ISO 27001, BSI IT-Grundschutz, TISAX, DORA)
- Strategic focus on Agentic AI and GenAI for modern IT Governance, Risk & Compliance Management
- IT interim management and strategic consulting
Mohammed N.
Last position:
IT System Manager at Corporate Network Solution Provider
- Architected, Deployed and Supported hosted email solutions in Linux and Windows environments with enterprise-grade anti-spam and security architecture for service-provider environments.
- Managed Microsoft Azure environments including Virtual Machines, VNets, Storage, VPN, and Firewall configuration.
- Administered Microsoft Exchange Server (2010-2019), Microsoft Exchange Server SE, Active Directory, PKI, Hyper-V and Zimbra environments with disaster recovery planning and operational support.
- Led Microsoft 365 onboarding and migration projects from Exchange, IMAP, and Zimbra platforms to Microsoft 365.
- Prepare security and compliance to support Microsoft 365 Copilot.
- Implement information protection and data loss prevention by using Microsoft Purview.
- Implement retention, eDiscovery, and communication compliance in Microsoft Purview.
- Integrated Active Directory Domain Services (AD DS), Active Directory Certificate Services (AD CS), and Active Directory Federation Services (AD FS).
- Delivered secure hybrid infrastructure solutions integrating Microsoft Windows Server and Linux-based enterprise environments.
- Supported enterprise integration projects involving Debian, Ubuntu, CentOS, Red Hat, Barracuda ESG, Qmail and Zimbra Platforms.
Rudolf E.
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-departmental collaboration with other teams on operations and further development, and reporting.
Firewall vulnerability analysis.
Firewall access requests.
Troubleshooting IP communication issues on network and firewall infrastructure.
Security-critical IT infrastructure, processing of personal data, compliance with legal requirements.
Products: Palo Alto Networks Firewalls, Cisco ACI, Checkpoint Firewalls, F5
Technologies: SDN, SDWAN, Cisco EPIC, Cisco ACI
Michael F.
Last position:
Platform Architect (Project lead) at Würth IT
I designed and built a self-service AWS platform for Data Science teams with little or no infrastructure-as-code experience. A team writes about 10 lines of Python and gets a deployable stack with full SDLC release cycle that already follows the governance rules. Networking, encryption, IAM and tagging are decided by the platform, not by each team.
New teams or AWS accounts are onboarded with one pull request. Waste prevention and cost control is built into the defaults: Data scientists don't need infrastructure skills.
- Construct library (AWS CDK, Python). Built a versioned catalog of about 20 hardened constructs for being used in data-science projects with ML context
- Governance as code
- Multi-account, multi-tenant
- Golden-path scaffolding
- CI/CD and supply chain. Built reusable GitHub Actions workflows
- Release engineering
- QA with e2e, contract testing and unit test coverage with each release candidate
Peter V.
Last position:
IT Administrator at SEAT Deutschland
- Creating concepts and architecture for domain integration (SEAT into the VW structure)
- Domain trusts and administration
- Operation and administration of Windows 2022/ 2025 servers and domains
- Domain restructuring
- GPO and SG editing and migration
- DNS restructuring and migration
Technologies: Windows 2022, Active Directory, ADFS, AD Azure Connect, DHCP, DNS, GPO, VMWare vSphere, Hyper-V, Powershell, Jira, MS Office 365,), SCCM, VSAN Fileservices, Approximately 800 servers, 400 users
Dany-Armand D.
Last position:
Senior Data Scientist at ibg NDT GmbH
- Investigate the relationship between Eddy Current Testing (ECT) signals and microstructural properties
- Detect latent patterns in ECT data that reflect intrinsic material characteristics
- Develop and validate predictive models for microstructural classification and quantification, using hardness and case depth as benchmarks
- Apply Bayesian Structural Equation Modeling for advanced data analysis
Lutz E.
Last position:
Freelance Software Developer – GoPro MultiCam Control via COHN at Plutos Company UG
- Developed a pilot system to control and monitor multiple GoPro cameras
- Implemented start, stop, status, media, download and diagnostic functions via COHN endpoints
- Built camera detection, individual and group control, and stable session/KeepAlive logic
- Set up a download pipeline with a queue, retry handling and temporary files
- Ensured consistent session, folder and file naming for multicamera recordings
- Integrated provisioning, certificates and network operations
Michael S.
Last position:
IT & Test Consultant at Testing Experts GmbH
AI Readiness - Part 3: Creating an e-book on the use of AI in software testing
- Designed and created an e-book on the sensible and safe use of AI in software testing from the perspective of an experienced test expert.
- Used generative AI (ChatGPT, Perplexity Pro) as a sparring partner for structuring, wording suggestions and creating variations, with all content finally reviewed and approved using my own expertise.
- Developed practical insights into the opportunities and risks of AI in testing, with a special focus on collaboration between testers and AI instead of “tester vs. AI”.
- Title: “11 starke Gründe: Dream-Team statt Rivalen - Tester und KI sind gemeinsam unschlagbar”
- Subtitle: “Wie Mensch und Maschine im Softwaretest das perfekte Team bilden – und warum reines KI-Testing riskant ist.”
- Planned use of the e-book as a basis for workshops, customer meetings or internal training.
- Technology: Generative AI, ChatGPT, Perplexity Pro, Microsoft Word, Adobe Acrobat, many years of hands-on professional testing experience, common sense.
Timo H.
Last position:
Software Developer at Smiths Detection
- Extension of a Swing-based UI for recording Security Restricted Articles during baggage screening.
- Introduction of a new workflow for recording Deboarding Events.
- Extension of the reporting system for Security Restricted Articles and Deboarding Events.
- Implementation using JBoss Wildfly, PostgreSQL, spring-boot 3.x, Java 8/21, Swing, JSF, JAX-RS/Resteasy, Docker, Maven, Kiro.
Franz B.
Last position:
Product Development (AI) at Self-initiated
AI phone assistant platform
Claude Code, Google AI Studio, Python, LLM / Voice-AI, PostgreSQL
- Designed and hands-on developed an AI-powered phone assistant platform (Voice-AI / LLM)—from idea and architecture through to MVP/product.
- Built agentic workflows and end-to-end automations with Claude Code and Google AI Studio.
- Also supported AI-powered delivery in client engagements: using Claude Code for governance documentation, requirements drafts, and automations.
Jörg T.
Last position:
Consultant, Requirements Engineer and Database Expert
Project – Evaluation and development of databases for a new product line for a measuring equipment manufacturer
- Current-state analysis
- Requirements analysis of the data storage layer
- Writing benchmark tests
- Design of the new database schema
- Database migrations
- Development of audit logging and Part11
- Creation of backup and recovery concepts
- Design of the persistence layer API
- Writing unit tests
- Creating requirements in Azure
Tools: C#, Visual Studio 2022, Azure DevOps, SonarQube, Git, RestSharp, WebServer, PostgreSQL, MS SQL, SQLite, MinIO, Podman, Docker, DataGrip, SQL Management Studio, HeidiDB, pgAdmin
Reinhold M.
Last position:
Business Requirements Engineer, Proxy Product Owner, Tester at AXA Konzern AG
Working Environment
- Insurance / Claims Management (Property, Liability, Automotive)
- REST-based ClaimAPI with Guidewire ClaimCenter
Scope
- Further development of the internal REST-based ClaimAPI with Guidewire ClaimCenter as the backend and various portals/front-end offices as clients, and with the following objectives: + increased AI-supported claims processing outside of Guidewire ClaimCenter + and support for all lines (property, liability, automotive).
- Further development of automated claims processing
Activities
- Interfacing IT & Business
- Design activities with documentation in Confluence, Jira: + Requirements engineering (functional and non-functional) + Design of REST endpoints and coordination with interface partners (esp. AI-colleagues) + Identification, design and evaluation of alternative solutions (moving away from a monolithic approach toward fine-grained endpoints, with code reuse across all lines if possible) + Creation / refinement of product backlog items in Jira, i.e. epics, user stories and tasks, incl. alignment with developers & POs during (pre-)refinement sessions + Using AXA Secure GPT when creating / refining user stories (description, acceptance criteria) and designing REST endpoints + Estimation and prioritization of user stories and tasks during Sprint Planning sessions + Coordination and support during the implementation of Product Backlog items + Driving decision making with preparation and presentation of decision-making documents
- Quality assurance: + Test management, including test case creation using Xray in Jira + Test execution using Bruno as REST client and in Guidewire ClaimCenter + Submission of test artifacts for PO approval + Analysis of production bugs
Methods Big Room Planning (aka PI-Planning in SAFe), Scrum, BPMN, EPK, UML, ERM, DDD
Tools / Tech Stack Teams, Confluence, Jira with Xray, OpenAPI/Swagger, REST, JSON, XML, MS Office, Bruno, GitHub repository (reading), Guidewire ClaimCenter, AXA Secure GPT (AXA's in-house GenAI solution based on Azure OpenAI)
Robert D.
Last position:
Java Software Architect at adesso insurance solutions GmbH
Discover over 15,000 top freelancers
Statistics of experts using SQL
Aggregated from the professional profiles of matched freelancers.
Experience
19 years
Position duration
5.1 years
Positions per freelancer
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
90%
Master's degree or higher
61%
Doctorate
9%
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
97%
Based on our profile pool as of 5 Nov 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts 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 5 Nov 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
SQL 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 (86%)
- Banking and Finance (46%)
- Manufacturing (41%)
- Professional Services (39%)
- Automotive (37%)
- Retail (33%)
- Healthcare (30%)
- Education (30%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What SQL does
SQL, or Structured Query Language, is the standard way to define, read, change, and secure data in relational databases. Companies use it to connect applications with structured information, enforce relationships between records, and turn operational data into reliable answers. SQL supports both day-to-day transactions and analytical workloads.
Where it is used
SQL appears in nearly every system that depends on consistent, queryable data. Typical deliverables include:
- Relational schemas for customer, product, financial, and operational data
- Queries, views, stored procedures, and database functions
- Reporting datasets, dashboards, and analytics pipelines
- Data migrations, imports, exports, and validation routines
- Access controls, audit logic, and retention structures
Ecosystem and dialects
SQL is a language, while database products implement their own dialects and capabilities. Professionals often work with PostgreSQL, MySQL, MariaDB, Microsoft SQL Server, Oracle Database, SQLite, or cloud services such as Amazon Aurora, Google Cloud SQL, and Azure SQL. Strong knowledge includes indexing, transactions, constraints, execution plans, and the differences between vendors.
When companies need specialists
Freelance expertise helps when a database has become slow, difficult to change, or hard to trust. Companies also bring in SQL specialists for a new application, a reporting overhaul, a migration between database systems, or a move toward cloud infrastructure. Clear signs include recurring query timeouts, duplicated data, fragile scripts, and reports that do not agree.
Skills around SQL
Effective SQL work connects database logic with the wider application and data landscape. Relevant adjacent skills include data modeling, ETL and ELT, Python, application frameworks, REST services, business intelligence tools, and cloud storage. Professionals may also handle backup planning, replication, monitoring, testing, and release processes.
What strong professionals deliver
A strong specialist starts by understanding data relationships, business rules, workload patterns, and operational risks. They write readable queries, test edge cases, measure changes with execution plans, and document decisions for the team. They also distinguish a quick query fix from a durable model improvement, protect sensitive data, and communicate trade-offs clearly.
Frequently asked questions
What clients ask us most about SQL — answered in short.
SQL is used to create and work with data in relational databases. It supports searches, inserts, updates, reporting, permissions, migrations, and the rules that keep related records consistent.
SQL is usually a strong choice when data has clear relationships, transactions, and structured reporting needs. NoSQL systems can suit flexible schemas, very large distributed workloads, or document and key-value access patterns, so the decision depends on consistency, query patterns, and operational constraints.
SQL specialists commonly work with PostgreSQL, MySQL, MariaDB, Microsoft SQL Server, Oracle Database, or SQLite. Experience with one product transfers well, but vendor-specific syntax, indexing, monitoring, and cloud deployment details still matter.
SQL work often connects with data modeling, ETL or ELT, Python, application development, and business intelligence tools. Knowledge of cloud databases, APIs, version control, testing, backups, and access management can be important for a complete delivery.
SQL project needs vary with risk and scope rather than a fixed experience level. A simple report may need focused query skills, while a migration, high-volume workload, or regulated dataset calls for proven modeling, performance, testing, and recovery practices.
SQL work is often suitable for remote collaboration because schemas, queries, documentation, and test environments can be shared securely. On-site sessions may still help with sensitive systems, access restrictions, workshops, or close coordination with operations teams.
SQL quality is shown through correct results, readable logic, appropriate indexes, safe transactions, and evidence from realistic tests. Ask for explanations of trade-offs and review how the specialist handles null values, duplicates, permissions, failures, and future changes.
SQL specialists should clarify the database product, data volume, workload patterns, security rules, environments, and definition of success. They should also confirm access arrangements, migration or rollback plans, test data, dependencies, and who will maintain the result after delivery.
The average hourly rate of freelancers who have used SQL in their recent projects is 94 €, which corresponds to a daily rate of about 752 € based on an 8-hour working day.
Of the freelancers who have used SQL in their recent projects, 90% hold at least a Bachelor's degree, 61% hold at least a Master's degree, and 9% hold a doctorate.
On average, freelancers who have used SQL in their recent projects have 19 years of professional experience, with a single engagement typically lasting around 5.1 years.
The most common languages among freelancers who have used SQL in their recent projects are German (98%), English (96%), and French (19%).
The most common industries among freelancers who have used SQL in their recent projects are Information Technology (86%), Banking and Finance (46%), and Manufacturing (41%).
The most common business areas among freelancers who have used SQL in their recent projects are Information Technology (92%), Product Development (75%), and Project Management (59%).
Main locations of FRATCH Experts, who have recently used SQL
Our freelancers and interim experts are at home all over Germany — available on-site in Berlin, Hamburg, Munich and every major business hub, or fully remote. Choose a city to discover matched specialists, local market insights and up-to-date availability.
Berlin 
Hamburg 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Dusseldorf 
Leipzig 
Dortmund 
Essen 
Bremen 
Dresden 
Hanover 
Nuremberg 
Vienna 
Graz 
Zurich 
Basel 
Bern Countries:
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FRATCH CEO
