Find the best Database Developers in Germany matched in minutes from 15,000 CVs with the power of AI.
For SQL Server, PostgreSQL, Oracle, MySQL, and data model redesigns, you need someone who can build clean schemas, tune queries, and protect data integrity. Get fast, precise matching with vetted, available freelancers.
About the role
What they do
Database developers design, build, and maintain the data layer behind business software. They turn business rules into tables, views, procedures, and secure access paths. Typical work includes greenfield database design, legacy cleanup, migration support, and performance work for slow applications.
Core deliverables
- Relational data models and schema design
- SQL scripts, stored procedures, functions, and views
- Query tuning and index optimization
- Migration plans and data transformation scripts
- Backup, restore, and integrity checks
- Documentation for handover and support
Skills and tools
A strong database developer writes clear SQL and understands how the database engine actually behaves. Common tools and platforms include PostgreSQL, Microsoft SQL Server, Oracle Database, MySQL, SSIS, SSRS, PL/SQL, T-SQL, and ER modeling tools. Good professionals also know normalization, transactions, locking, permissions, and how to work with application teams without breaking existing systems.
When companies bring one in
Companies usually hire a freelance database engineer when a product launch, migration, audit, or performance issue needs focused attention. It is common in SaaS, manufacturing, logistics, finance, healthcare, and internal enterprise software. In Germany, many teams need support that fits mixed setups, with some work done remotely and some sessions on-site for workshops, go-live support, or access to sensitive systems.
What separates the best
- They ask about data flow, load patterns, and failure points before changing anything
- They write maintainable SQL, not clever SQL that nobody can support
- They document dependencies, permissions, and rollback steps
- They spot bottlenecks in schema design, joins, and indexing
- They work well with backend developers, analysts, and ops teams
Search terms and adjacent roles
Searchers often use terms like database engineer, SQL developer, or DBA for related work. A true Database Developer is usually focused on schema, SQL logic, and application-facing data design, while a DBA is more centered on platform operations, availability, and security administration. The best freelance specialists can cover both sides when the project needs it, but they should be clear about where their main strength lies.
Meet FRATCH Database Developers
Daniel Martinez Maqueda
Founding Database Engineer
Last position:
Founding Database Engineer at tonbo.io
Working on the next iteration of tonbo to make it the most flexible in-process analytical database in the market that scales and is operated with strong availability
Introduced object scope cache to the remote storage layer to avoid I/O churn
Working on refactoring WAL to support remote storage
Taking care of the health of the systems as well as designing the operational story and bringing them to production
Technologies: LSM, WAL, Arrow, Parquet, Rust
Frank Speelmans
Software and Database Developer
Last position:
Software and Database Developer at Frigosped GmbH
- Upgrading the existing Delphi 2010 version to Delphi 10.4.
- Making all software products Terminal Server compatible.
- Maintaining and enhancing the in-house shipping software until it is replaced by a newly purchased version.
- Technologies: Delphi 2010, Delphi 10.4, Advantage Database, DevExpress, Git, Devart, OOP.
Timon Ringwald
Database Developer – Research Project – Healthcare Billing
Last position:
Database Developer – Research Project – Healthcare Billing at MeQuEn GmbH
- Optimizing dynamically generated databases for logging
- Tools: MariaDB, C#, Visual Studio, VMs, Docker, Windows, Linux
Dalia Cananau
Oracle Developer
Last position:
Oracle Developer at Freelance
- Design and implementation of an OCI-based data warehouse and ETL system to replace legacy mainframe applications
- Developed a database optimization strategy and planned the rapid conversion of JCL and COBOL routines to PL/SQL using AI
- Developed an Oracle Apex-based app for internal administrative processes in the public sector (office equipment, staff training)
- Implemented PL/SQL workflows for approval processes and created a responsive mobile version with JavaScript and CSS
- Used Azure DevOps for backlog management and documentation, and Git for version control
- Developed REST interfaces to CRM systems
- Replaced and reprogrammed Oracle Forms screens with Oracle Apex and updated to the latest Apex versions
- Designed a Git branching strategy and conducted code reviews
- Maintained and further developed an EDI-based data exchange system based on Oracle Advanced Queuing for the public sector in Austria
- Performed data analysis and created charts in the Oracle Apex frontend; installed standalone ORDS and Apex 23.1
- Worked agile using the Spotify model; developed complex Apex pages with support from Oracle JET
- Rebuilt and customized existing PL/SQL packages, created workarounds for database version differences, and optimized queries
- Developed Apex applications for broker pools to manage and optimize Oracle databases in the banking environment, including SSO-based authorization systems with OAuth2 and Keycloak
- Built extensive Oracle Apex applications for BI and data mining modernization projects and developed manual and automated projection methods in the frontend
- Carried out data warehousing projects in the banking sector and used Scrum and Kanban in team projects
Joachim Bleichert
Further development and maintenance of a company-wide monitoring database
Last position:
Further development and maintenance of a company-wide monitoring database at BASF SE
Maintenance of a company-wide Oracle database that consolidates information from various internal databases, Active Directory, and other systems
Data transfer via Oracle jobs between the monitoring database and other systems
Data visualization and processing using APEX and Oracle Forms (with Forms being replaced by APEX)
Gathering requirements from business units
Designing the implementation
Implementation at the database level and in APEX
System maintenance
Troubleshooting
Technologies: Oracle 12, Oracle 19, Oracle PL/SQL, Oracle APEX, SQL Developer
Stephan Zinke
GIS expert and database developer for passenger information systems
Last position:
GIS expert and database developer for passenger information systems at Deutsche Bahn AG
- Developed automated tools for train passenger information with PostgreSQL/PostGIS (administration & development)
- Used imposm, osm2pgsql, pgsql2shp, GeoServer (WMS, WFS, WCS, etc.)
- Used various geo formats, e.g. OpenStreetMap (OSM)
- Technologies: PostgreSQL/PostGIS, imposm, osm2pgsql, pgsql2hp, ESRI Shapefiles, QGIS, Python 3.x, PyDev, Eclipse, Linux, AWS, OSM, XML, bash, pgsql, Docker
Lutz Haake
Oracle DBA | Technical Analyst | PL/SQL Developer
Last position:
Developer for Oracle Forms, PL/SQL, Java at AIG Europe S.A.
- Development and implementation of backend components with PL/SQL and Oracle Forms 12c. Adaptation and further development of the policy administration system. Technical consulting in UI design with a focus on integrating existing Oracle Forms and the requirements of the BIPRO framework.
- The project takes place in the technical environment of BIPRO, SQL databases and Oracle Forms applications. The assigned work includes backend development and technical further development in the above project with the following tasks:
- Development and implementation of backend components with PL/SQL and Oracle Forms 12c to technically map the business processes and ensure a stable and efficient system architecture
- Adaptation and further development of the policy administration system to ensure system functionality in line with the requirements of the new broker communication program
- Analysis of the existing system to identify and avoid errors and technical problems during implementation, in order to enable a smooth transition to the new system
- Carrying out patching and further development of existing Oracle and Oracle Forms applications to ensure compatibility and security of the systems in use
- Technical consulting in UI design with a focus on integrating existing Oracle Forms and the requirements of the BIPRO framework.
Label: PL/SQL, Java, Oracle RDBMS and Oracle Forms
Carsten Leschik
Business / Functional Analyst and Oracle Developer DWH
Last position:
Business / Functional Analyst and Oracle Developer DWH at Comdirect
- Requirements analysis
- Source data analysis
- Development of ETL pipelines
- Data modeling of the staging, core and mart layers
- Calculation of key performance indicators (KPIs) at the mart layer
- Methods used: Agile, Data Vault 2.0
- Technologies used: Oracle 19, ODI, PL/SQL, Kafka, Python, PowerDesigner, SAP-BO, Git, Jira, Confluence
Matthias Barfknecht
Database Developer / Database Architect
Last position:
Database Developer / Database Architect at Freelancer
- Advised and supported application developers on database topics
- Designed and developed interfaces
- Optimized database performance
- Automated rollout and release processes in the database environment
- Implemented security requirements
- Delivered metrics to management
- Developed new scripts to automate rollouts
- Adapted scripts for database deliveries
- Identified and resolved issues during Oracle 12 to 19 upgrades
- Adjusted database parameters, permissions and roles
- Conducted feasibility studies and migrations from AWS EC2 to AWS RDS
- Migrated database delivery versioning from SVN to Git/Artifactory using Ruby and Artifactory REST API
- Analyzed Statspack/AWR reports and optimized long-running SQL statements
- Configured SSL/TLS encryption for Oracle databases including proof of concept and rollout planning
- Configured Kerberos authentication for Oracle users with Active Directory and single sign-on
- Conducted database technology selection workshops for microservices (SQL, NoSQL, Amazon S3)
- Modeled and designed a PostgreSQL Docker instance with liquibase scripts for Git pipeline deployment
- Refactored mass data export interfaces and developed PL/SQL packages
- Developed PL/SQL packages for REST-service communication and SOAP data conversion
- Supported cloud migration of Oracle databases to AWS RDS with migration scripts
- Developed and refactored PL/SQL functions/packages for performance and business logic
- Planned and prepared new database schemas using execution plan analysis and AWR metrics
Discover over 15,000 top freelancers
Database Developers statistics
Typical experience
26 years
Average project duration
3 years
Certifications per freelancer
1
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Banking and Finance, Automotive
Most common languages
German, English, French
Bachelor's degree or higher
60%
Master's degree or higher
40%
Doctorate
20%
Salary / Daily Rate Distribution
The chart shows how the daily rates of freelancers in this role 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. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Average rates for Database Developers & Seniority distribution
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.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Frequently Asked Questions
Questions in mind? Get key insights about FRATCH
A Database Developer usually delivers schema changes, SQL scripts, stored procedures, views, and data migration logic. They may also tune slow queries, review indexes, and help with test data or rollback scripts. The exact scope depends on whether the project is a new build, a migration, or a repair of an existing system.
A database developer focuses on the data model and the SQL logic used by applications. A DBA is more concerned with administration, uptime, backups, access, and platform health. An SQL Developer is often used as a lighter title for similar work, but the scope can vary by company.
A freelance Database Developer makes sense when the need is tied to a project, a migration, or a short period of intensive optimization. It is also a good choice when your internal team lacks a specific database stack or needs extra hands without long hiring cycles. For clearly bounded work, freelance support is often the cleaner option.
Look for strong SQL, solid data modeling, and real experience with the database engine you use. The best database developers understand transactions, indexing, locking, permissions, and performance troubleshooting. Ask how they approach debugging, migration safety, and handover documentation.
That depends on your stack, but common choices include PostgreSQL, Microsoft SQL Server, Oracle Database, and MySQL. For a database engineer profile, you may also want exposure to SSIS, PL/SQL, T-SQL, monitoring tools, and ER modeling software. Pick someone who has worked in the same environment, not just with the same brand name.
Many Database Developers in Germany can work remotely for design, scripting, and tuning tasks. On-site sessions help when they need access to restricted systems, want to map a complex landscape, or must align closely with local stakeholders. A mixed setup is common for migrations and production support.
Ask for examples of past database designs, performance fixes, and migration plans. A strong SQL developer explains trade-offs clearly and can show how they protected data integrity and reduced risk. Good signs are clean documentation, realistic estimates, and a methodical way of testing changes.
Most German clients want clear documentation, disciplined change control, and direct communication. A Database Developer working there should be ready for structured reviews, mixed English and German teams, and careful attention to production standards. Remote work is often fine, but workshops and go-live phases may require closer collaboration.
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We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
