SQL Experts in Leipzig
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Meet FRATCH Experts in Leipzig, who have recently used SQL
Andreas Fischer
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
Natascha Fadeeva-Gladbach
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 Richter
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 Zermeno
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 Teich
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 Weißbach
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%
Gwen Glaser
Last position:
Senior Ruby on Rails & DevOps Developer at Sapiens
Further development of a software solution for managing test requests and test notifications according to §106d SGB V for the Hamburg Association of Statutory Health Insurance Physicians.
- Developed numerous features, performance optimizations, refactoring, error analysis
- Refactored the dev container setup
- Optimized the GitLab CI build pipeline
- Contributed optimizations to the team workflow
Mathias Hammerschmidt
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
Aisha Muhammad Arshad
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.
Michael Lühr
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
Knud Werner
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 Beckert
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 Fischer
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
Murilo Silva
Last position:
Physicist at UFPR Curitiba
- Conducting research
- Study about interaction radiation with matter
Sebastián Katzer
Last position:
Smart Charging at Mercedes-Benz, MBTI
Agile software development in an interdisciplinary environment
Cross-team collaboration to achieve important milestones
Independently developing new and improving existing features
Estimation, refinement, implementation, and presentation
Finding solution ideas, analyzing problems, rolling out bug fixes
Writing automated tests, manual testing, log and error analysis
Ensuring high availability, fault tolerance, and scalability of the production environment
Rolling out releases and multi-stage infrastructure
Setting up alerts and monitoring
Pair programming, code reviews, documentation
On-call duty, 3rd level support
Event-Driven Architecture, Clean Code, Hexagonal Architecture
Microservices based on Go (Gin), Java 21 (Spring Boot 3), Python (FastAPI)
Terraform/OpenTofu, KQL, SQL, JSON, REST, Helm, ArgoCD, AzureCLI, K9s, OAuth2
Postgres, Redis, Kafka, Azure EventHub, Kubernetes, nginx, Ingress
AppInsights, LogAnalytics, OpenTelemetry, Datadog, OpenAPI 3, Swagger
Azure DataExplorer, Storage, KeyVault, Container Registry, Azure Functions,…
Junit5/Jupiter, testify, RestAssured, Docker Compose, Wiremock
IntelliJ, Scrum, Kanban, Teams, Confluence, OpsGenie, Arc42
GitHub CI/CD, GitLab CI/CD, Azure DevOps
EV charging protocols (EVSE, OCPP, V1G, V2G)
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 years (Germany: 5.2 years)
Positions per freelancer
13 (Germany: 12)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Retail, Education
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
92% (Germany: 89%)
Master's degree or higher
62% (Germany: 59%)
Doctorate
8% (Germany: 9%)
Certifications per freelancer
1 (Germany: 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 Leipzig 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 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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
Querying data
SQL, or Structured Query Language, is the standard way to read and change data in relational databases. Companies use it to power reports, dashboards, application features, and data exports. Strong specialists know how to turn business questions into clean, fast queries.
Common work
- Write SELECT statements, joins, and CTEs for reporting and product data
- Create INSERT, UPDATE, and DELETE logic for application workflows
- Build views, stored procedures, and reusable query patterns
- Support analytics, ETL steps, and data validation
Database ecosystems
SQL work often sits inside PostgreSQL, MySQL, SQL Server, Oracle Database, or SQLite. In real projects, specialists also handle indexes, constraints, transactions, and permissions. They need to understand how schema design affects query plans and day-to-day operations.
When to bring in help
Companies usually bring in freelance SQL experts when queries are slow, reporting is unreliable, or a new system needs a solid data layer. In Leipzig, this often comes up in software teams, logistics, manufacturing, commerce, and data-heavy service firms. Remote work is common, but on-site sessions help when teams need schema reviews or access planning.
What strong specialists do
A strong SQL specialist writes clear statements that others can maintain. They test edge cases, avoid unsafe updates, and know how to read execution plans. They also coordinate well with application, analytics, and infrastructure people so data changes stay safe.
Signs you need SQL expertise
- Reports disagree with the source data
- Queries time out or lock tables
- Schema changes break applications
- Legacy code uses ad hoc SQL that is hard to maintain
- You need help with T-SQL, PL/SQL, or PostgreSQL-specific syntax
Frequently asked questions
Before you brief your next project: the most common questions about SQL.
A strong SQL specialist helps companies build reporting queries, data extracts, and database logic that applications depend on. That can include views, stored procedures, validation rules, and schema changes that keep data consistent. It is often the core skill behind dashboards, operational reports, and integrations.
SQL is best for structured data, clear relationships, and queries that need joins, grouping, and transactions. NoSQL systems are used when a different data model fits better, such as document or key-value storage. Many projects use SQL for the system of record and another store for a specific use case.
A good SQL freelancer should be comfortable in the database your product actually uses, such as PostgreSQL, MySQL, SQL Server, or Oracle Database. The exact syntax and tooling vary, especially for T-SQL and PL/SQL. Good specialists also understand indexing, locking, and backup-safe changes.
A simple reporting fix may need only one solid SQL specialist, while a migration, performance review, or schema redesign needs deeper database experience. The real question is complexity, not the size of the team. If the work touches live data, transactions, or legacy stored procedures, choose someone who has done that kind of change before.
Yes, most SQL work can be done remotely because the main tasks are query design, review, and troubleshooting. For teams in Leipzig, remote collaboration works well when access, security, and communication are clear. On-site time is useful for workshops, data audits, or close work with product and operations teams.
SQL specialists often need data modeling, database administration basics, and some scripting in Python, Bash, or a BI tool. Knowledge of ETL processes, performance tuning, and version control also helps. For application work, understanding the surrounding codebase matters just as much as the query itself.
Look for clear explanations, safe query patterns, and proof that the person checks execution plans and edge cases. A strong SQL expert should ask about schema, data volume, locking, and how changes will be tested. Good specialists write queries that are readable, maintainable, and easy for others to review.
Yes, SQL remains central to most data stacks because relational databases still store critical business data. Even when teams add warehouses or lakehouse tools, SQL is often the common language for analysis and transformation. For many companies, it is the fastest path from raw data to useful answers.
The average hourly rate of freelancers in Leipzig, Germany who have used SQL in their recent projects is 95 €, which corresponds to a daily rate of about 763 € based on an 8-hour working day.
Of the freelancers in Leipzig, Germany who have used SQL in their recent projects, 92% hold at least a Bachelor's degree, 62% hold at least a Master's degree, and 8% hold a doctorate.
On average, freelancers in Leipzig, Germany who have used SQL in their recent projects have 19 years of professional experience, with a single engagement typically lasting around 2 years.
The most common languages among freelancers in Leipzig, Germany who have used SQL in their recent projects are German (94%), English (94%), and French (22%).
The most common industries among freelancers in Leipzig, Germany who have used SQL in their recent projects are Information Technology (89%), Retail (44%), and Education (39%).
The most common business areas among freelancers in Leipzig, Germany who have used SQL in their recent projects are Information Technology (94%), Product Development (78%), and Operations (56%).
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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Philipp Thomaschewski
FRATCH CEO
