JDBC Experts in Germany
matched in minutes from over 15,000 CVs with the power of AIHire experts who use JDBC to connect Java services to relational databases, tune SQL access, and fix driver or transaction issues. They support legacy application stacks, new backend services, and database-heavy integrations, with fast and precise matching to vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used JDBC
Hooman Behmanesh
Last position:
Fullstack Developer at Möbel Roller GmbH
- Further development of the existing e-commerce platform based on SAP Commerce (Hybris) to meet the growing demands of digital commerce.
- Ensuring the scalability and performance of the backend, so the platform remained stable and efficient even under heavy user load.
- Development and integration of new OCC REST APIs and services for modular extensions and flexible adjustments, to implement new features quickly.
- Optimization of data flows and interfaces, which significantly improved platform efficiency and system performance.
- Ensuring a maintainable and scalable code base by using Clean Code principles, proven design patterns, and a future-proof architecture.
- Reduction of errors through extensive testing with JUnit, Mockito, and load tests with Gatling, supported by the introduction of automated test processes.
- Improved system performance through targeted refactoring measures and efficient database queries, especially to handle peak loads.
- Use of modern cloud and monitoring tools such as Kubernetes, Google Cloud Platform (GCP), and Grafana to ensure a stable and monitored infrastructure.
- Clear improvement in efficiency, scalability, and reliability of the platform, which now meets the demands of a dynamic and growing e-commerce market.
Sabahattin Kunas
Last position:
Sole responsibility (concept, development, infrastructure, operations) at Own project busik.ch
- Ride-sharing and bus platform, live and working. Backend Spring Boot 4.1 on Java 21, PostgreSQL with Flyway, Testcontainers integration tests. Running in my own AWS account (ECS Fargate, ALB, ECR, IAM least privilege) with CI/CD via GitHub Actions and OIDC federation without static credentials. Development throughout AI-assisted with Claude Code, including my own skills and project-specific memory. Spring Boot · Java 21 · PostgreSQL · Flyway · Docker · AWS ECS/ALB/ECR · CI/CD · GitHub Actions · Claude Code
Kiriakos Krastillis
Last position:
Tech Lead / Architect : OTTO API Platform at OTTO
maturing their API Practices on both, a Business and Technology level. My role encompasses strategy, architecture, developer advocacy as well as hands on software engineering, enabling both technical teams and business leadership to adopt and act on API- centric principles effectively. Coincidentally, we also establish GitOps, DX and Platform Best practices with this project.
Highlights:
- Aligning executives with the initiative by clarifying strategy, replacing misconceptions and myths with facts, clarifying the value of existing assets and enabling informed decision-making
- Formulating a way forward for API Lifecycle Management at OTTO
- Driving platform progress and fostering developer engagement by hands-on engineering work towards strategic goals
API Lifecycle Management, Team Topologies, Organizational Evolution, Regulatory, Platform Advocate, Developer Platform, Communities of Practice, Terraform, Kotlin, Kafka, Kong, WSO2, Apigee, Gravitee, Backstage, AsyncAPI, OpenAPI, API Design, AWS, react, nodejs, typescript, redocly, reactive programming, CDC, golang, gingonic, GitOps, DX (developer experience), stakeholder management, roadmaps, workshops, discovery.
Thorsten Matzner
Last position:
Odoo Implementer at N.N.
As project manager for the Odoo implementation at a small company, I was responsible for designing, implementing, and training a fully integrated CRM and accounting system. Through structured requirements analysis, precise data migration, and targeted change management, I was able to complete the rollout in just eight weeks. The project led to a significant reduction in manual tasks, faster business processes, and increased real-time transparency.
Main Responsibilities
Requirements analysis and process mapping Configuration of Odoo modules: CRM, Sales, and Accounting Data migration (Excel/CSV → Odoo) and quality control Creation of workflows, automated email rules, and dashboards Conducting training sessions and providing support after go-live Project coordination (budget, schedule, stakeholder communication)
Key Achievements
Full implementation of the Odoo suite within the set timeframe (8 weeks) 30% reduction in accounting time and 25% acceleration of the lead-to-sale flow 100% customer satisfaction after go-live, based on survey results Successful migration of 100% of existing master data without data loss Establishment of a sustainable support infrastructure (3-month post go-live support)
Impact
Improved decision-making through real-time dashboards and automated reports Increased efficiency and cost savings (≈ €8,000/month) Scalability for future growth (additional modules can be integrated seamlessly) Strengthened sales and finance departments through seamless process integration
This summary highlights how I created concrete and measurable value for the company through structured project work, technical expertise, and targeted training.
Rüdiger Schulz
Last position:
Full-Stack Software Engineer / Consultant for Digitalization at ARTEVENT
Designed, built, and launched an internal event planning web application used by over 100 department leads for a large event, despite having no dedicated testing phase.
Ensured smooth, failure-free operation during first production use, leading to the tool being adopted for future events.
Automated catering calculations and related workflows, significantly reducing email communication and manual computation effort for meal planning.
Managed deployment and hosting on a Linux server using Coolify, including application setup and runtime operations.
Hired and guided a communication designer on UX while independently owning all technical decisions and implementation.
Tymofii Sukhachov
Last position:
Senior Backend Developer at Medavis
- Developed backend features for Modern RIS, a web-based Radiology Information System integrated with the existing Classic RIS via WebView.
- Worked on a modular Spring Boot backend covering clinical workflows such as appointments, examinations, patients, orders, reporting, billing, and inventory.
- Contributed to event-driven architecture using domain events to decouple workflows across backend modules.
- Implemented REST/OpenAPI endpoints, service-layer business logic, DTO mapping, validation, and integration points for the React frontend.
- Worked with PostgreSQL-backed domain models, Liquibase database changes, read/write model separation, and legacy RIS database structures.
- Integrated authentication and authorization flows using Keycloak and OAuth2.
- Added and maintained unit/integration tests using JUnit, Rest Assured, Testcontainers, and project-specific test utilities.
- Supported CI/CD and local development workflows using Maven, Docker Compose, Jenkins, and generated OpenAPI clients.
Tech stack: Java 21, Spring Boot 3.5, Maven, PostgreSQL, Liquibase, Keycloak, OAuth2, REST, OpenAPI/Springdoc, MapStruct, Lombok, Docker, Testcontainers, Jenkins.
Vladimir Filatov
Last position:
IT Consultant at ITZBund
- ITSM consulting, analysis and optimization of IT capacity with BMC TSCO / BMC Helix
- Drafting "Governance guidelines for operational capacity management"
Stephan Giuliari
Last position:
Senior Backend Software Developer at Mercedes-Benz Tech Innovations
- Further development and operation of a central backend service providing vehicle inventory for international Mercedes-Benz online stores
- Enhancement of a vehicle reservation service as part of the checkout process
- Design and implementation of a highly scalable end-to-end test architecture focused on maintainability, reusability, and a high number of automated test cases
- Development of a multi-layered test infrastructure with a clear separation of test logic and access layers
- Development of an initialization and caching architecture to significantly speed up local and CI/CD-based test runs
- Development of an AI-driven review architecture for automated evaluation and quality assurance of end-to-end tests
- Development of a dashboard to consolidate vehicle context across multiple backend systems, including AI-generated summaries and condensed case analyses
- Integration and further development of connections to various reservation systems via Apache Kafka and REST
- Design of new microservices and support in architectural decisions
- Risk analysis and planning of microservice migrations
- Technologies: Java, Spring, Spring Boot, Gradle, Maven, Apache Kafka, REST, OpenAPI, Swagger, GitHub, Confluence, CI/CD, Microservices, AI, LLMs
Rahul Joshi
Last position:
Hybris Consultant at Bosch Digital
- Implement Hybris Commerce projects for customer.
- Provide technical implementation of Developer and Integrator portal using Hybris solution.
- Integration with Billing and Payment systems.
- Technical ownership of the solution.
- Introduce best practices in Hybris solution and Java technologies.
- Provide release support on AWS environments.
- Technical focal point for sales and engineering teams.
- Supporting engineering team to scope the requirements and in architecting & designing the solutions.
- Proliferate best practices from one project to others, Knowledge management.
Olaf Taesch
Last position:
BI Architect in a Kanban Team at Gulp / Randstad for HHLA
- Creation of automated tests.
- Extension of the functionality of the enterprise BI data warehouse.
- Design and development in SQL and PL/SQL.
- Data modeling as well as performance measurement and tuning.
- Creation of and contribution to user stories and concepts.
- Technical environment: Windows, Linux.
- Database: Oracle 19c incl. DWH, CDB, PDB.
- Tools: Confluence, CVS, Eclipse, Git, GitLab, Jira, N4, PL/SQL, SQL Developer, utPLSQL.
Ola Van Dunen
Last position:
IT Lecturer
- IT training in theory and practice for IT specialists in application development and system integration
Stephan Heilmann
Last position:
Development, Tester at Telecommunications
Set up an operational contract information system. This is mainly used as an order management system - for migrating existing contracts as well as for creating and providing new contract bundles.
Sales agents can use it to order new services, modify existing ones and migrate service types, as well as provide price information to the customer.
This supports the marketing of new services as well as the replacement of old services for existing customers.
In addition, existing data is imported, processed (ETL) and provided via services for further use in the portal front end.
Analysis of the business and technical use cases (workflows, involved processes/systems, communication paths, security requirements)
Further development / creation of the front-end components (React/JavaScript)
Design and implementation of the business logic
Creation of the functional and technical component documentation
Test execution / test automation (Cypress, test coverage)
Team size: 8 people
Technologies: React, JavaScript, Rest (JSon), Yaml, Markdown, MariaDB (SQL), Docker, Swagger, Cypress
Tools: Webstorm, ReactDeveloperTools, VisualStudioCode, Word, DBeaver, Git/GitLab
Work management: GitLab
Platform: Linux
Build management: GitLab
Rainer Langbehn
Last position:
Senior IT Consultant, Senior Software Architect, Senior Software Developer, Senior DevOps Engineer at Techniker Krankenkasse
Automation of the database major / minor releases for the TKeasy project
Concept for database major / minor release automation
As-is analysis
Evaluation of Redgate Flyway functionality
Concept creation
Products: Redgate Flyway, GitHub, Quest, Erwin Data Modeller, Oracle, Atlassian Jira, Atlassian Confluence
Skills: Docker, Continuous Delivery, Continuous Integration, Redgate Flyway, Major Releases, Minor Releases
Oliver Ohly
Last position:
Embedded Software Architect at Automotive supplier
Stellar SR6 G7 line, 32-bit Arm® Cortex®-R52+ MCU.
- MISRA-C, C99, Greenhills ARM compiler
- Dassault AUTOSAR Builder
- EB Tresos
- Sparx Enterprise Architect 16.1
- VS Code
- Python xml, lxml, NumPy and Pandas
ISO 26262, ISO 21434, hypervisor, key management, HSM. Tooling & automation. LieberLieber LemonTree + Sparx EA. Jira, Confluence, SharePoint. Git/Github. DevOps through Jenkins & Conan.
Waldemar Biller
Last position:
Software-Architekt Produktdaten-Management Tool at Ferchau Contract GmbH
- Definition of the software architecture
- Design and development of modules
- Supporting internal employees in the learning and onboarding process
- Tools: SAP CAP / CDS, Java 21, SAP Hana, SAP Business Technology Platform (BTP)
Discover over 15,000 top freelancers
Statistics of experts using JDBC
Aggregated from the professional profiles of matched freelancers.
Experience
24 years
Position duration
1.9 years
Positions per freelancer
17
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Retail
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
89%
Master's degree or higher
54%
Doctorate
5%
Certifications per freelancer
2
Most common languages
English, German, French
Speak two or more languages
98%
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 Germany 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 Germany using JDBC
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
JDBC at a glance
JDBC, short for Java Database Connectivity, is the standard Java API for talking to relational databases. It is used to run SQL, read result sets, manage transactions, and keep Java applications connected to data stores such as PostgreSQL, MySQL, Oracle Database, and SQL Server.
What specialists deliver
- Data access layers for services, APIs, and internal tools
- Clean handling of connections, pooling, and prepared statements
- Transaction control, batching, and error handling
- Driver setup for app servers, microservices, and batch jobs
- Troubleshooting slow queries and inconsistent data access
Where it shows up
JDBC appears in enterprise systems, finance, logistics, insurance, retail, and public sector software. It is common in Spring-based backends, older Java EE systems, and integration jobs that still rely on direct SQL access.
For companies in Germany, it often matters that the specialist can work with local teams, review existing code quickly, and communicate clearly with backend and database stakeholders.
Skills around the API
Strong JDBC professionals know more than the API itself. They understand SQL, schema design, connection pooling, transaction boundaries, isolation levels, and how different drivers behave across databases.
They also work well with related tools and patterns:
- Spring JDBC and plain JDBC
- HikariCP or other pool setups
- Stored procedures and parameter binding
- Logging, profiling, and query analysis
When to bring in help
Companies usually bring in freelance JDBC experts when an application is slow, brittle, or hard to maintain. The need is common during migrations, database changes, performance work, or when old data access code must be stabilized without a full rewrite.
A good specialist can trace issues from Java code to SQL and back, then leave the code easier to support.
What strong professionals do well
- Write readable, safe data access code
- Avoid connection leaks and risky string-built SQL
- Keep transactions narrow and predictable
- Adapt code to the database in use, not just the Java layer
- Explain trade-offs clearly to other specialists
The best JDBC experts are practical. They know when direct JDBC is the right choice and when a higher-level abstraction fits better.
Frequently asked questions
Key details about JDBC, drawn from the questions we get asked most.
JDBC is the standard way Java code talks to relational databases. Teams use it to run SQL, read rows, write data, handle transactions, and work with drivers for systems like PostgreSQL, MySQL, Oracle Database, or SQL Server. It is a core choice for backend services, batch jobs, and older Java applications that still need direct database access.
JDBC is lower level and gives direct control over SQL, result mapping, and transaction handling. JPA and Hibernate sit higher up and reduce boilerplate, but they can hide important database behavior. Many projects use JDBC when they need predictable SQL, tight performance tuning, or fine control over legacy code.
A company should bring in JDBC expertise when data access code is slow, fragile, or tied to an older Java stack. It also helps during database migrations, driver changes, production incident work, or when a team needs help making SQL code safer and easier to maintain. The best time is before a small data issue turns into a system problem.
A strong JDBC expert usually also knows SQL, transaction handling, schema design, and connection pooling. Familiarity with Spring JDBC, stored procedures, query profiling, and the target database matters too. The best freelancers can move between the Java layer and the database layer without losing context.
Not every JDBC task needs a very senior profile, but complex database work usually benefits from one. Simple CRUD code can be handled by a solid generalist, while performance issues, transaction bugs, and legacy refactoring need deeper experience. The harder the production impact, the more important proven delivery becomes.
Yes, most JDBC work can be done remotely because the main tasks are code review, debugging, SQL analysis, and collaboration with backend specialists. For German teams, it helps if the freelancer can work comfortably in English and, when needed, align with local stakeholders on technical details. On-site sessions are useful for critical workshops or incident recovery.
Look for clear examples of safe SQL, proper transaction handling, and clean use of prepared statements in JDBC code. Good specialists explain why they chose a certain pattern, not just how they wrote it. They should also talk confidently about driver behavior, connection pooling, and diagnosing database bottlenecks.
Yes, Java Database Connectivity is still highly relevant wherever Java applications need direct, reliable database access. It is common in modern services as well as long-lived systems that cannot justify a full abstraction layer. Many teams keep it because it is simple, explicit, and easy to reason about when used well.
The average hourly rate of freelancers in Germany who have used JDBC in their recent projects is 95 €, which corresponds to a daily rate of about 764 € based on an 8-hour working day.
Of the freelancers in Germany who have used JDBC in their recent projects, 89% hold at least a Bachelor's degree, 54% hold at least a Master's degree, and 5% hold a doctorate.
On average, freelancers in Germany who have used JDBC in their recent projects have 24 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Germany who have used JDBC in their recent projects are English (99%), German (96%), and French (13%).
The most common industries among freelancers in Germany who have used JDBC in their recent projects are Information Technology (96%), Banking and Finance (60%), and Retail (43%).
The most common business areas among freelancers in Germany who have used JDBC in their recent projects are Information Technology (100%), Product Development (93%), and Quality Assurance (67%).
Main locations of FRATCH Experts, who have recently used JDBC
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 
Cologne 
Frankfurt Request a free demo
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Philipp Thomaschewski
FRATCH CEO
