SQL Experts in Leipzig
for reliable data systems, matched in minutes with vetted and available freelancersHire experts who design relational data models, optimise complex queries and build dependable reporting pipelines with SQL, PostgreSQL or Microsoft SQL Server. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your technical requirements.
Meet FRATCH Experts in Leipzig, who have recently used SQL
Gwen G.
Last position:
Senior Ruby on Rails & DevOps Developer at Sapiens
Further development of a software solution for managing audit applications and audit notifications according to §106d SGB V for the Association of Statutory Health Insurance Physicians in Hamburg.
- Developed numerous features, optimised performance, refactored code and analysed errors
- Refactored the development container setup
- Optimised the Gitlab-CI build pipeline
- Introduced improvements to the team workflow
Michael L.
Last position:
B2B Shop Development for Curtain Fabrics
- Development of a B2B shop based on Magento 2
- Plugin research and implementation, e.g. custom prices per customer
- Implementation of individual customizations
- Quality assurance
- Release management
- Collaboration with the marketing team
- Technologies: Magento 2, CSS, JavaScript, PHP, Docker, Git
Natascha F.
Last position:
Senior iOS Developer - ANÜ at Stadtwerke München GmbH
- Development of an iOS app that combines public transport and sharing services
- Collaboration in Scrum within a large cross-functional team
- Creation of reusable components with SwiftUI and Combine
- Development of custom solutions for Apple Maps
Frank R.
Last position:
eCommerce Software Developer at WirTube-Shop
- Maintenance and system handover
- Planning and carrying out core and plugin updates
- Developing a plugin to extend invoice creation and payment via Flow Builder
Luis Z.
Last position:
Talent Partner + internal AI builder (GTM, DACH/EMEA) at Lucanet AG
- Built an internal AI recruitment assistant (Python, LangChain, Claude API) and deployed it into the team's Greenhouse workflow: automated candidate screening, structured interview-feedback extraction from transcriptions, and comms across high-volume DACH/EMEA GTM pipelines. Scoped the need with TA/GTM leadership, shipped the tool, and drove day-to-day adoption, the same loop a forward-deployed engineer runs at a customer site.
- Led ATS migration from Personio to Greenhouse across the whole team: data model, migration, and team adoption.
- Ran discovery-style intake calls translating vague requests ("we need someone senior for Italy") into structured requirements, the muscle a forward-deployed engineer uses to scope a customer deployment. 80%+ offer acceptance, ~120% of quarterly targets. Discovery and delivery in EN, DE, ES, FR.
Peter T.
Last position:
Freelance Go-Developer/DevOps-Engineer at IONOS SE
- Implementation of an API for customers to provide NFS shares in the cloud
- Creating Kubernetes operators and services with REST APIs in Go
- Using LinuxKit for provisioning VMs
Sascha W.
Last position:
Lead Product Owner CADKit at Ottobock SE
- Realignment and technical leadership of a CAD web platform for the global digitization of the prosthetics manufacturing process
- Translating the CPO's vision into a technical roadmap and leading an interdisciplinary team of developers, designers, and QA
- Implementing complex 3D interfaces using Vue.js and Three.js
- Global rollout of 8 scalable web apps, increasing production efficiency by 80%
Mathias H.
Last position:
Subject Matter Expert at Bayer Bitterfeld GmbH
- SAP S4 HANA implementation: creating process descriptions for a new SAP system environment, system trainings, writing specifications for adjustments in the production control system
Andreas F.
Last position:
Project Manager & Portfolio Owner for Infrastructure (Automotive) at MHP Management- und IT-Beratung GmbH
- Overall coordination of service providers for all infrastructure topics at a production site being set up in Baden-Württemberg
- Design and finding solutions for internet connectivity, building office communication networks, setting up WLAN in production and administration buildings, IP address management, password policies, time tracking, access control systems, backup strategies, emergency power planning, operating concepts, cost planning, event management, workplace setup including laptop/mobile phones/telephony, remote support, print servers
- Selecting suitable external service providers and planning to meet needs for spare parts, repairs, on-site service, network and workplace support including on-site system replacement by providers
- Choosing suitable external service providers for facility management and building technology (fiber optic connections, data center infrastructure, cable ducts etc.)
- Coordination with clients and service providers
- Escalation management, schedule control
- On-site presence for service meetings and managing service providers
Aisha M.
Last position:
Operation Associate at Swappie
- Achieved full productivity within 2 weeks of onboarding in a high-volume operational environment.
- Consistently exceeded quality targets, maintaining 98% accuracy across all assigned tasks.
- Recognized by leadership for exceptional performance and rapid adaptation to complex workflows.
Yutong W.
Last position:
AI Engineering Working Student at Siemens AG
- Developed a fully local, privacy-friendly RAG chatbot for querying PDFs containing both text and tables.
- Enabled semantic search across multiple documents and built a user-friendly Chainlit UI with rating (1–5) and feedback functionality.
- Designed a reward model for fine-tuning the LLM based on user feedback.
Andreas M.
Last position:
Managing Director at ESIS-ERP GmbH
- Took over management of the company
Knud W.
Last position:
Lead Programmer, Architect and Deputy Product Owner at Bundesagentur für Arbeit
- Lead programmer, architect and deputy product owner
- Completed transition from zPDV to STEP
- Ensured quality of C++ and Perl sources through automated and manual checks
- Supported resolution of incidents and errors in testing
- Implemented batch for supplementary assignment of payment run numbers
- Implemented batch for distribution of SGB 2 information to the central payment unit
- Supported replacement of Solaris with Linux
- Upgraded gcc from 7.4 to 9.3
- Programmatically generated Makefiles from Borland projects for builds
- Extended funding data with new attribute “internship travel cost indicator”
- Programmatically generated XSD and WSDL files from IDL definitions
- Represented the product owner when needed
- Implemented batch for one-time payment processing
- Developed generator for Liquibase files
- Implemented and maintained regular anonymization of production data
- Supported migration from SLES 12 to SLES 15
- Supported introduction of mutual TLS
- Implemented batch for sending deletion impulses to EDA BE
- Organized script directory structure
- Investigated potential introduction of String-Latin and implemented minimal solution
- Remediated security findings identified by CheckMarx
- Supported PAP recalculations and general change notices
- Converted ERP interfaces from SOAP to REST
- Planned technical and business topics such as register modernization, cash register security, training costs, four-eyes principle
Jan B.
Last position:
API-Engineer at Freelance
- API-first product design (OpenAPI 3, HAL) and development (NodeJS)
- Setting up DevOps pipelines with GitHub Actions in an AWS architecture
- Technologies: OpenAPI 3, REST, HAL, NodeJS, JavaScript, TypeScript, AWS, AWS Lambda, Docker, GitHub Actions
Jens F.
Last position:
Strategic Business Consultant at EURO Kartensysteme
- Analysis, redesign and functional specification for a software system to record, process and reimburse all claims in the girocard scheme
- Analysis, conception and execution for a bidding for the introduction and implementation of Identity & Access Management, Masterdata Management and Document Management Systems
- Project management for the software development project for the EKS-Net platform for the recording, processing and reimbursement of all claims in the girocard scheme
- Project management for the introduction of Identity and Access Management System, Master Data Management System and Document Management System
- Strategy consulting for digitalization of business processes
- Advice on payment transactions, compliance (PEP and sanction list checks) and risk analysis
- Design of data models and APIs
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
2.2 years (Germany: 5.1 years)
Positions per freelancer
12
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Education, Manufacturing
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
93% (Germany: 90%)
Master's degree or higher
64% (Germany: 60%)
Doctorate
14% (Germany: 9%)
Certifications per freelancer
1 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
95% (Germany: 97%)
Based on our profile pool as of 9 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Leipzig 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 Leipzig 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 9 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 (84%)
- Education (42%)
- Manufacturing (42%)
- Retail (42%)
- Healthcare (37%)
- Tourism (37%)
- Energy (32%)
- Banking and Finance (32%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What SQL does
SQL is the standard language for working with structured data in relational database systems. Companies use it to define schemas, store records, connect related tables and retrieve precise results. It supports operational applications, analytics, reporting and data services across many industries.
Databases and tooling
SQL expertise often covers a database engine as well as the language itself. PostgreSQL, MySQL, MariaDB, Microsoft SQL Server, Oracle Database and SQLite each bring different features, administration models and performance options. Strong professionals also work with:
- Query plans, indexes and transaction handling
- Views, stored procedures and database migrations
- Backup, replication and access control
- SQL clients, command-line tools and monitoring systems
Typical project work
SQL specialists contribute wherever accurate, accessible data matters. Their deliverables can include a normalised schema, migration scripts, reporting queries, stored procedures or a tuned production database. Common use cases include:
- E-commerce orders, inventory and customer records
- Finance, controlling and regulatory reporting
- Logistics, manufacturing and operational planning
- Product analytics and business intelligence
When companies need help
Freelance expertise is useful when a database has become slow, difficult to change or hard to trust. Companies also bring in specialists during a platform migration, a reporting rebuild, a data warehouse project or an urgent production investigation. In Leipzig, remote collaboration can support local teams while on-site work remains useful for workshops, system reviews and regulated environments.
Skills around SQL
Reliable SQL work depends on understanding the systems around the database. Professionals may connect SQL with Python, Java, C#, PHP or application frameworks, and with ETL tools, dashboards, data warehouses and cloud services. They should understand version control, automated tests, deployment workflows, data quality and privacy-aware access models.
What strong experts deliver
Strong SQL professionals clarify the business meaning of data before writing queries. They choose readable structures, test edge cases and explain trade-offs between speed, consistency and maintainability. Look for evidence of measurable query improvements, safe migrations, resilient recovery procedures and clear documentation. They also communicate effectively with product, operations and data teams, whether the collaboration is in English or German.
Frequently asked questions
Before you brief your next project: the most common questions about SQL.
SQL is used to create and query relational databases that store business records such as orders, customers, inventory and financial transactions. Companies also use it for reporting, analytics, data validation and integrations between applications.
SQL databases use structured schemas, relationships and transactions, making them a strong choice for consistent business data. NoSQL systems can be more suitable for highly variable structures, very large distributed workloads or use cases that prioritise flexible document and key-value access.
SQL specialists often work with PostgreSQL, MySQL, MariaDB, Microsoft SQL Server or Oracle Database. The right experience depends on the existing system, licensing model, cloud environment, transaction needs and compatibility requirements.
SQL work benefits from knowledge of data modelling, indexing, query optimisation and transaction control. Experience with ETL pipelines, Python, application frameworks, business intelligence tools, cloud databases and version-controlled migrations can also be important.
SQL project needs vary with the risk and scope involved. A reporting adjustment may need focused query knowledge, while a production migration, warehouse redesign or performance incident calls for proven experience with the relevant database engine and recovery process.
SQL work is often well suited to remote collaboration through secure access, documentation, code review and shared development environments. On-site sessions in Leipzig can still help with discovery workshops, access coordination, stakeholder interviews or systems that cannot be exposed remotely.
SQL quality is shown through correct results, understandable queries, appropriate indexes and safe handling of concurrent changes. Ask for examples of query plans, testing methods, migration rollbacks, monitoring and documentation rather than judging work by short queries alone.
SQL expertise is valuable when reports disagree, queries slow down, schema changes become risky or a database migration is blocked. A specialist can diagnose the root cause, improve the design and leave behind tested queries, documentation and practical operating guidance.
The average hourly rate of freelancers in Leipzig, Germany who have used SQL in their recent projects is 98 €, which corresponds to a daily rate of about 786 € based on an 8-hour working day.
Of the freelancers in Leipzig, Germany who have used SQL in their recent projects, 93% hold at least a Bachelor's degree, 64% hold at least a Master's degree, and 14% hold a doctorate.
On average, freelancers in Leipzig, Germany who have used SQL in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Leipzig, Germany who have used SQL in their recent projects are German (95%), English (95%), and French (26%).
The most common industries among freelancers in Leipzig, Germany who have used SQL in their recent projects are Information Technology (84%), Education (42%), and Manufacturing (42%).
The most common business areas among freelancers in Leipzig, Germany who have used SQL in their recent projects are Information Technology (89%), Product Development (79%), and Operations (53%).
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 
Dortmund 
Essen 
Bremen 
Dresden 
Hanover 
Nuremberg Request a free demo
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FRATCH CEO
