
SQL Experts in Stuttgart
from over 15,000 CVs with fast, precise AI matchingHire experts who design reliable data models, optimise complex queries and build reporting pipelines with SQL, PostgreSQL, MySQL or Microsoft SQL Server. FRATCH matches you quickly with vetted, available freelancers for focused delivery or long-term data work.
Meet FRATCH Experts in Stuttgart, who have recently used SQL
Swetha B.
Last position:
Project Management at the sandblasters GmbH
- Planning and concept development for building a new business model, including structuring and implementing business processes.
- Coordination and management of external service providers as well as interface management.
- Introduction and implementation of new digital tools and processes to optimize operational workflows.
Karin A.
Last position:
AI Benchmark Engineer | Native language specialist German at Lilt
- Task Engineering: Evaluating Coding Agents.
- Asset Creation: Building realistic task environments using datasets and files in German. Crucially, these assets must remain in the target language to genuinely measure multilingual handling.
- Prompting & Translation: finding failure points where AI does not work, in German.
- Implementation & Verification: Supporting the development of robust solutions (reference implementations) and write highly reliable, deterministic verifier scripts (using rubric-based judging only when strictly necessary).
- Calibration & Execution: Analyze execution logs and calibrate task difficulty (Easy to Very Hard) using standard Terminal-Bench run configurations against various model tiers (Haiku, Opus).
- Quality Assurance: Participation in a rigorous, 4-layer human quality control process (creation, human review, calibration review, and audit) alongside automated LLM-based checks to ensure fairness, grammatical accuracy, and benchmark integrity.
- Linguistic Review: Reviewing AI benchmark tasks across Hindi, Arabic, Japanese, Chinese, Czech and Turkish.
Matthias S.
Last position:
Software Developer and Consultant at CLADE GmbH
- Analysis of the existing CAN communication between microcontrollers
- Analysis of the sensors used and the measured values collected
- Planning the CAN messages for transmitting the measured values
- Iterative adjustment of the microcontroller code to the new CAN messages
- Cross-compilation from x64 to arm64
Sercan T.
Last position:
Co-Founder & Lead Software Architect at Pflege-Pfad
- Focus: system architecture, cloud-native platforms, microservices, API design
- Product: Pflege-Pfad is a digital matchmaking platform that connects relatives of people in need of care directly with verified care services and caregivers - without an agency and without ongoing fees.
- Business analysis & process design:
- Analysis of the German care market and identification of the key pain points of both target groups.
- Modeling of the core business processes: registration, verification, care request, application, placement, and rating.
- Definition of the business model as a freemium/premium model with optional contact unlocking.
- Creation of user stories and requirements documentation for relatives, care services, and administrators.
- Design of trust and quality assurance mechanisms with document upload, admin review process, and rating system.
- Coordination with stakeholders and validation of product decisions with potential users.
- Technical implementation:
- Design and implementation of the entire platform architecture as a solo developer.
- Design and implementation of a REST API with Spring Boot and Kotlin, including JWT-based authentication.
- Development of the frontend as a single-page application with Angular 17.
- Implementation of the AWS infrastructure with EC2, RDS PostgreSQL, S3, CloudFront, and IAM.
- Document upload with AWS S3 via presigned URLs for verification of care services.
- Email notifications via Resend API.
- AI-supported care service search via OpenAI API.
- Implementation of complete user flows such as registration, login, password reset, and placement process.
- Building an admin panel for user and care service management as well as analytics.
- CI/CD with GitHub Actions and containerized deployments with Docker.
- End-to-end tests with Playwright.
Technologies: Kotlin, Spring Boot 3, Spring Security, JWT, JPA/Hibernate, PostgreSQL, Angular 17, TypeScript, RxJS, AWS (EC2, ECS, S3, CloudFront CDN, RDS PostgreSQL, IAM), nginx, GitHub Actions, Playwright, Maven, Git, OpenAI API, Resend API, Docker, Scrum, i18n (DE/EN/TR), Kiro, feature-flag architecture.
Talha E.
Last position:
Interim Senior Finance Business Partner at SharkNinja Europe Ltd.
Responsibility for commercial finance in Central Europe (DACH and Poland), reporting to the EMEA Commercial Finance Director. Monthly financial reporting, forecasting, and variance analysis, evaluation of promotions and special campaigns, management of planning processes including budgeting, as well as preparation of QBR materials up to CFO level. Took over functional leadership in the finance team after the mandate holder was unavailable.
Artyom N.
Last position:
AI Automation Engineer & Solution Architect at Technology Research Project
Designed and developed an AI-powered automation platform using n8n to analyze social media niches, identify target audiences, and automate marketing strategy generation. The solution combined AI agents, workflow orchestration, and data analysis to automate research processes and generate data-driven insights.
- Designed and implemented complex automation workflows using n8n
- Developed AI-powered analysis agents for market and audience research
- Integrated multiple APIs and AI services into automated workflows
- Built automated market, competitor, and target audience analysis pipelines
- Leveraged Large Language Models (LLMs) for information summarization, classification, and prioritization
- Containerized and deployed the platform using Docker
Technologies: n8n, AI Agents, OpenAI APIs, Prompt Engineering, LLMs, Docker, Linux, REST APIs, Webhooks
Alexander Z.
Last position:
Fullstack Developer and DevOps Engineer at Freelancer
- Developing the infrastructure and improving existing infrastructure: Jenkins, Gitlab Pipeline, OpenShift, Docker, Helm Chart, Kubernetes, Artifactory, CodePipeline, CodeArtifact, Python
- Documenting solutions in Jira/Confluence
- Supporting other colleagues in different technical areas
Mustafa Ö.
Last position:
Data & Business Analyst at Self-Employed / Freelancer
External consultant for various projects in the automotive industry.
Data-driven business and performance analysis
Analysis, interpretation and validation of complex business data
Identification of trends, risks and potential areas for improvement
Translation of analytical findings into actionable business recommendations
Preparation and presentation of results for business stakeholders
Marko O.
Last position:
System Administrator in a 6-person Team at FITS
- System administration of FreeBSD 11, 12 and 13.1 in a secure cloud software solution
- Administration of proxy servers for FITS and its clients, banks and state banks
- Administration of secure internet solutions
- Administration of secure mail solutions and mail gateways
- Administration of Apache 2.4 web servers
- Planning and maintenance of servers and network components in FNT Command
- Incident, change and ticket handling, especially troubleshooting network issues using Splunk and ARS
- Troubleshooting and log file analysis using Splunk Enterprise
- Monitoring with Nagios
- Ordering, provisioning and installation of certificates on Apache web servers, Nginx web servers and load balancers
- Hardware: HP ProLiant DL380 Gen 9 and 10, Cisco Catalyst
- Software: FreeBSD 11, 12 and 13.2, FNT Command, shell scripts, MySQL databases, ServiceNow, ARS, Splunk Enterprise 8.15
German R.
Last position:
Freelance Technical Product Owner & AI Product Builder at Neckarshore AI / Freelance
Two complementary tracks: (a) building my own AI products and open-source tools under the Neckarshore AI brand, with a focus on AI-supported multi-agent development processes and documentation automation; (b) freelance support for industrial, logistics, and financial companies in IT-related transformation projects.
Current product portfolio under the Neckarshore AI brand:
- Omnopsis Documenter — AI-powered documentation engine: generates compliance, technical, and release documentation from Git, Jira, and Confluence. 500+ automated tests, 100+ API endpoints, RBAC, monitoring stack.
- TrustScope — trust analysis for public GitHub repos: deterministic three-pillar report (Security & Supply Chain, Governance, Community) based on OpenSSF Scorecard, with constructive fix suggestions instead of a single misleading score.
- md-viewer — dependency-free Markdown viewer for macOS (Finder Quick Action) and web, split view of rendered document and raw text.
- Obsidian Vault Autopilot — AI-supported vault automation for Obsidian × Claude Code: sorts the inbox, renames notes, enriches frontmatter.
- Phonesis Voice Bank — voice archive for families, hospices, and cultural archives (guided recordings, inheritable archive, optional voice cloning); currently in the GDPR compliance phase (Art. 9, biometric data).
- Multi-Agent Development Process — 12+ specialized agents (architecture, implementation, security, refactoring, marketing) with structured handoff protocol, parallel execution, and automated quality assurance — powers the entire product development.
- Freelance consulting: Technical Product Ownership for production, logistics, and compliance/AML systems; steering international rollouts including test, cutover, and change management.
Stack: NestJS, TypeScript, PostgreSQL, Redis/BullMQ, Next.js, Claude Code (Opus), Docker, GitHub Actions, Vercel
Gildas D.
Last position:
System Team Lead Diagnostics – Hybrid & Electric Drives (HEV/MHEV/PHEV) for Transmission and Engine (NA/SA) at Stellantis e-transmission
- Technical lead of diagnostics activities for eDCT transmissions and drive systems in the area of hybrid (HEV), mild-hybrid (MHEV), and plug-in hybrid vehicles (PHEV)
- Responsibility for the development and validation of DTC strategies (OBD / EOBD) for markets in North and South America and the EU
- Coordination between interdisciplinary teams (system development, software, safety, calibration, after-sales)
- Creation and maintenance of diagnostic specifications (DID, DTC matrix, snapshot, freeze frame) according to STLA standards
- Support with troubleshooting, validation tests, EOL processes, and internal audits
- Technical interface to suppliers (Bosch, Valeo, etc.) in the area of actuators, sensors, and electric pumps
- Creation of diagnostic RFQ
Deepak N.
Last position:
Consultant at Advantest Europe Gmbh
- Develop hardware drivers and middleware using C++11, Java and Python
- Design of various RF features such as deembedding based on stakeholder requests
- Work with multiple teams to design drivers for multiple RF products
- Perform HW control to deliver RF signals and measure modulated response
- Develop RF drivers for generation of low noise signals to test WiFi7 products
- Use digital modulation techniques such as QAM for low level driver development
- Develop low level USB drivers for device enumeration
- Develop drivers for HW relay control of control boards for device testing
- Perform JTAG operations on devices under test
- Use network-based protocols (SFTP, UFTP, FTP, SSH) for control board communication
- Manage HW devices such as BADC and EEPROM for control board maintenance
- Utilize C++11/14/17 features, template metaprogramming and STL
- Employ multithreading for testing and control of multiple HW devices
- Develop tools for deployment of customer OS on control boards
- Perform component and integration tests using CxxTest
- Follow Scaled Agile Framework for software development
- Create detailed design documents using PlantUML
Wael M.
Last position:
Test Manager at Schwarz IT
- Design, planning, and test case analysis
- Integration testing
- Coordination of UAT in the lab and on site
- Creation of HW and SW test catalogs
- Communication of test results from REST services with the SAP team
- Support for branches in the EU until rollout
- Coordination of defect management and SW updates with the involved vendors
- Checking the configuration of the charging stations in the backend software for different countries
- Continuous reporting of the quality status to project management
- Documentation of the user manual in English and German
- Tools: Confluence, be.Energised, OCPP Postman, OPI, CCV (payone.elavon), Excel, it4you
Carlos M.
Last position:
Implementation in Pimcore/Shopware
- Consulting, design, analysis, software architecture and development
- Designing, developing, and implementing a Pimcore environment and connecting multiple external API systems in a Kubernetes environment, as well as various PIM and ERP systems
- Technologies: Unix environment, design, Symfony development, PHP 8+, software architecture, MySQL/SQL, shell scripting, Git DevOps tasks, AI coding support, Pimcore 12, Shopware 6
- Team size: >10 people
George O.
Last position:
IT Senior Consultant at Data Group
- IT Senior Consultant (bank infrastructure, Active Directory, Azure, security, PKI)
- Planning, design, and implementation of cloud solutions based on Microsoft Azure / M365
- Teams, M365, and cloud services
- Vulnerabilities, threats, attacks
- Security analysis, security policy, security architecture
- Conducting meetings and presentations at various management levels
- Organizing and leading team meetings to improve internal communication
- Tools: PowerShell, Active Directory, GPO, DNS, DHCP, scripting
Discover over 15,000 top freelancers
Statistics of experts using SQL
Aggregated from the professional profiles of matched freelancers.
Experience
21 years (Germany: 19 years)

Position duration
2.4 years (Germany: 5.1 years)

Positions per freelancer
14 (Germany: 12)

Top business areas
Information Technology, Product Development, Project Management

Top industries
Information Technology, Automotive, Manufacturing

Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
97% (Germany: 90%)
Master's degree or higher
61% (Germany: 60%)
Doctorate
3% (Germany: 9%)

Certifications per freelancer
3

Most common languages
German, English, French

Speak two or more languages
100% (Germany: 97%)
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 Stuttgart 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 Stuttgart 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 19 Sep 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 (76%)
- Automotive (69%)
- Manufacturing (58%)
- Banking and Finance (36%)
- Professional Services (36%)
- Healthcare (31%)
- Government and Administration (29%)
- Aerospace and Defense (27%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What SQL does
SQL, short for Structured Query Language, is the standard way to store, query and manage structured data in relational databases. Companies use it to connect applications with dependable records, transform raw information into useful views and support decisions with accurate reporting.
Where it runs
SQL is used across transactional systems, analytics environments, customer portals, finance applications and operational dashboards. Common database platforms include PostgreSQL, MySQL, MariaDB, Oracle Database and Microsoft SQL Server. Experts also work with cloud services such as Amazon Aurora, Google Cloud SQL and Azure SQL Database.
Typical deliverables
- Relational data models with clear entities, keys and constraints
- Queries, views, stored procedures and database functions
- ETL transformations and reporting datasets for business intelligence
- Indexing, execution-plan analysis and query performance improvements
- Migration scripts, data validation and integration with application services
The right approach depends on transaction volume, consistency needs, reporting demands and the database engine already used by the company.
When expertise matters
Companies bring in freelance SQL specialists when a database has become slow, difficult to change or hard to trust. They may need help migrating legacy schemas, preparing a warehouse, resolving production incidents or making data accessible to analysts. In Stuttgart, SQL work often supports manufacturing, mobility, software and business services, with collaboration arranged on-site, remotely or in a hybrid model.
Skills around SQL
Strong professionals combine SQL with data modelling, database administration, version control and automated testing. They may also use Python, Java, .NET, dbt, Apache Airflow or a business intelligence tool to connect database work with wider data processes. Knowledge of cloud infrastructure, security and backup strategies helps them deliver solutions that remain dependable beyond the initial change.
How to assess quality
Look for experts who explain trade-offs instead of simply rewriting queries. They should understand normalization, indexing, locking, transactions, permissions and execution plans, and they should be able to measure whether a change improves the real workload. Good documentation, reversible migrations and clear validation steps are strong signs of professional SQL work, especially when remote teams need transparent handover.
Frequently asked questions
Curious about SQL? Here are the answers that come up again and again.
Companies use SQL to create, read, update and organize data in relational databases. It supports application back ends, financial records, inventory systems, customer data, analytics, reporting and integrations.
SQL is a strong choice when data has clear relationships, reliable transactions and structured queries. NoSQL systems can be more suitable for flexible schemas or certain high-scale access patterns, so the decision depends on consistency, workload, data shape and the surrounding application.
A capable SQL specialist can usually transfer core skills between PostgreSQL, MySQL, MariaDB, Oracle Database and Microsoft SQL Server. They should also understand each system's dialect, indexing behavior, transaction model and operational tooling rather than treating all databases as identical.
Professionals working with SQL often bring data modelling, ETL, database performance tuning and data governance skills. Python, dbt, Apache Airflow, cloud database services and business intelligence tools are useful additions depending on the project.
The right level for SQL depends on the work, not a fixed duration. A focused reporting task may need strong query and domain knowledge, while a migration, high-load system or complex data model calls for someone who has handled production risks, testing and rollback planning.
SQL work is often well suited to remote collaboration when access, documentation and deployment procedures are clear. Stuttgart companies can combine remote delivery with on-site workshops when domain discovery, security reviews or coordination with operational teams benefits from personal contact; German or English communication can be agreed in advance.
Ask a SQL specialist to explain the data model, query plan, indexing decisions and failure cases in plain language. Review whether the work includes tests, safe migrations, permissions, monitoring and documentation, not only whether a query returns the expected result.
A SQL change should involve the application team when it alters schemas, constraints, transactions or query contracts used by services. Close coordination helps prevent deployment conflicts and ensures that database improvements support real application behavior rather than an isolated test case.
The average hourly rate of freelancers in Stuttgart, Germany who have used SQL in their recent projects is 98 €, which corresponds to a daily rate of about 787 € based on an 8-hour working day.
Of the freelancers in Stuttgart, Germany who have used SQL in their recent projects, 97% hold at least a Bachelor's degree, 61% hold at least a Master's degree, and 3% hold a doctorate.
On average, freelancers in Stuttgart, Germany who have used SQL in their recent projects have 21 years of professional experience, with a single engagement typically lasting around 2.4 years.
The most common languages among freelancers in Stuttgart, Germany who have used SQL in their recent projects are German (98%), English (98%), and French (31%).
The most common industries among freelancers in Stuttgart, Germany who have used SQL in their recent projects are Information Technology (76%), Automotive (69%), and Manufacturing (58%).
The most common business areas among freelancers in Stuttgart, Germany who have used SQL in their recent projects are Information Technology (91%), Product Development (76%), and Project Management (69%).
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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