SQL Expert in Stuttgart
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Meet FRATCH Experts in Stuttgart, who have recently used SQL
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 placement platform that directly connects relatives of people in need of care 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 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 the sole 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 using presigned URLs to verify 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 the placement process.
- Development of 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.
Carlos M.
Last position:
Implementation in Pimcore/Shopware
- Consulting, design, analysis, software architecture and development
- Design, development and implementation of a Pimcore environment and connection of several external API systems in a Kubernetes environment, as well as various PIM and ERP systems
- Technologies: Unix environment, design, Symfony development, design, PHP 8+, software architecture, MySQL/SQL, Shell Script, Git Dev Ops tasks, AI coding assistance, Pimcore 12, Shopware 6
- Team size: >10 people
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.
Will O.
Last position:
Solution Architect at Polizei Behörde Stuttgart
Designed a migration strategy for WLS applications to BKA Cloud and Stack IT
Created a hybrid cloud for internal testing and development with Kubernetes
Transformed the IT landscape from an outdated monolithic architecture to a cloud-based architecture
Integrated new CI/CD processes using Azure Pipelines
Quadrupled the processing throughput for personnel security checks
Migrated personnel security screening applications to Docker-based applications
Implemented CI/deployment pipelines using Azure DevOps
Environment: Java Springboot, Kubernetes, Oracle Weblogic, OpenID, Camunda, JUnit, TOGAF
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
Pierre-Jean A.
Last position:
Verification Engineer – Aviation at Tri.Merge GmbH
- Automated analysis of test script repositories using Python
- Set up a SQLite database for signal and value tracking
- Identified critical inconsistencies through ad hoc SQL queries
- Technologies: Python, SQLite, Excel/ODBC
Ronald F.
Last position:
Senior IT Consultant – Requirement Engineer at Deutsche Bank - Strivion
Methodology: Agile project management
Goal: Digitization and implementation of CCD2 requirements within the Consumer Finance systems.
Analysis, identification, and assessment of business requirements, as well as their transfer into technical implementation requirements. Coordination and status reporting of the various requirements. Documentation and process management using UML and BMPN. Cross-functional stakeholder management, UAT testing, data management, API architecture management.
Tools: Jira, Confluence, Visual Code, Sql Developer, Enterprise Architect, MsOffice, Bruno, ALM, Camunda, Figma
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
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
Talha E.
Last position:
Interim Senior Finance Business Partner at SharkNinja Europe Ltd.
Responsible for Commercial Finance in the Central Europe region (DACH and Poland), reporting to the EMEA Commercial Finance Director. Monthly financial reporting, forecasting and variance analyses, 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 of the Finance team following the absence of the position holder.
Günter L.
Last position:
Project Support during the Relocation and Closure of a Plant
- Documentation
- Process design/optimization
- Creating bills of materials
- Logistics
Ivan G.
Last position:
Technical Lead at Porsche Digital GmbH
- Contributed to the design of the new financial services integration layer and moderated the architectural discussions
- Oversaw the security concept and approval of the application
- Prepared infrastructure setup and best practices for the Kotlin backend
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
2.3 years (Germany: 5.1 years)
Positions per freelancer
15 (Germany: 12)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Automotive, Manufacturing
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
100% (Germany: 90%)
Master's degree or higher
61%
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 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Stuttgart 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 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 29 Oct 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 (56%)
- Banking and Finance (38%)
- Professional Services (36%)
- Healthcare (31%)
- Government and Administration (31%)
- Aerospace and Defense (29%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
SQL foundations
SQL, or Structured Query Language, is the standard language for working with relational data. Companies use it to define schemas, store records, query information, enforce relationships and control access. It supports operational applications as well as reporting, analytics and data integration.
What SQL builds
SQL specialists turn business requirements into reliable data structures and useful data services. Their work commonly includes:
- Relational schemas for customer, product, finance and operational data
- Queries, views, stored procedures and database functions
- Reporting datasets, dashboards and analytical models
- Data migrations, imports and synchronization pipelines
Ecosystem and tooling
SQL appears across database systems such as PostgreSQL, MySQL, Microsoft SQL Server, Oracle Database and SQLite. Strong professionals understand each system’s dialect, indexing behavior, transaction model and administration tools. They also work with ORMs, APIs, ETL tools, BI applications and cloud database services.
When companies need help
Freelance expertise is useful when a product is outgrowing its original schema, a migration must avoid service disruption or slow queries affect daily operations. It can also support legacy modernization, data quality initiatives and the design of a new reporting layer. In Stuttgart, specialists may collaborate remotely or work with local teams in automotive, manufacturing, software and business services.
Signs of strong expertise
Good SQL work is more than writing a query that returns the right rows. Experienced professionals clarify data meaning, protect sensitive information and consider maintenance, concurrency and failure scenarios. Look for evidence of:
- Clear normalization and pragmatic denormalization decisions
- Query plans, indexes and performance diagnostics
- Safe migrations with rollback and validation steps
- Automated tests for data logic and integration behavior
Choosing the right specialist
Match the professional to the database system, workload and delivery risk. Transaction-heavy applications need strong knowledge of consistency, locking and recovery, while analytical environments call for expertise in aggregation, dimensional modeling and data movement. Ask how the specialist documents assumptions, reviews queries and communicates with product, application and data teams in a remote or on-site setting.
Frequently asked questions
Curious about SQL? Here are the answers that come up again and again.
SQL is used to store, retrieve, change and analyze structured data in relational databases. It supports application features, financial reporting, inventory systems, customer records, dashboards and integrations.
SQL databases organize data through defined relations and provide strong tools for transactions, constraints and structured querying. NoSQL systems can be a better fit for flexible schemas, very large distributed workloads or specialized access patterns, so the choice depends on data shape and consistency needs.
SQL expertise is stronger when combined with data modeling, database administration, scripting and application integration. Useful adjacent skills include Python, Java, REST APIs, ETL processes, cloud services, Git and business intelligence tools.
SQL project needs depend on risk, scale and the condition of the existing data model rather than a fixed duration of experience. A reporting task may need focused query and modeling knowledge, while a migration or high-traffic application requires proven work with performance, recovery and safe releases.
SQL work is often well suited to remote collaboration through shared repositories, ticketing systems, documentation and secure database access. On-site work in Stuttgart can help when the project involves workshops, sensitive environments or close coordination with manufacturing and business teams.
SQL quality should be judged by correctness, clarity, performance and resilience under realistic data volumes. Ask the specialist to explain execution plans, indexing choices, transaction behavior, test coverage and how the query will remain understandable after handover.
SQL is a language standard, but database products implement their own dialects and capabilities. A specialist familiar with PostgreSQL, MySQL, Microsoft SQL Server or Oracle Database should explain which features are portable and which require product-specific solutions.
SQL specialists should clarify the database engine, data sensitivity, workload type, delivery environment and definition of success. They should also confirm access controls, migration procedures, documentation expectations and whether the work supports transactions, reporting or both.
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 780 € based on an 8-hour working day.
Of the freelancers in Stuttgart, Germany who have used SQL in their recent projects, 100% 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 2.3 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 (33%).
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 (56%).
The most common business areas among freelancers in Stuttgart, Germany who have used SQL in their recent projects are Information Technology (91%), Product Development (78%), 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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Hamburg 
Munich 
Cologne 
Frankfurt 
Dusseldorf 
Leipzig 
Dortmund 
Essen 
Bremen 
Dresden 
Hanover 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
