HSQLDB Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used HSQLDB
Tezcan Dilshener
Last position:
Solution Architect / Project Manager at German Football Association
- Overall responsibility for the project lifecycle from scope definition to completion
- Close collaboration with platform teams, IT leaders, and external service providers
- Application of SAFe principles and structured sprint work
- Creation of a migration roadmap with clear milestones
- Monitoring of the lifecycle: onboarding, repository migration, replication of permissions, and system tests
- Visualization of the architecture with PlantUML and Gliffy as well as documentation in Confluence
- Regular status reports and running knowledge transfer sessions
Frank Bergmann
Last position:
System Engineer at Frequentis Comsoft
- Migrate company software to RHEL10
- Development in Bash, Python, C, Ansible
Sven Hummel
Last position:
Process Architect (Symbio, Signavio) at IT service provider for an international premium automaker
- Analyzing, aligning and modeling business processes (BPMN 2.0) for the 'The New Retail' program in the areas of invoicing, tax, customs and accounting
- Tracking user stories and their impact on processes
- Point of contact for preparing the tool migration from Symbio to Signavio for the mentioned areas
- Power user after the introduction of Signavio, point of contact and coach for other process modelers
Manish Kumar Jaiswal
Last position:
Freelance Senior Solutions Architect at YoungIT
- Worked with a UK based organisation offering a range of free sexual health services such as STI testing, treatment and contraception across the UK
- Created a Liferay DXP based customer facing portal (version 7.4) over Liferay Experience Cloud
- Designed and developed Liferay modules
- Managed Liferay Experience Cloud and release management
- Coordinated with different teams and helped other team members on Liferay challenges
- Engaged in discussions with business and stakeholders on expectations
- Implemented architectural best practices
James Cullimore
Last position:
Freelance Android Developer at Normalis
- Working on Telecommunication Apps on Android under NDA for the Military
- Participation in the development of backend services (Spring, Java)
- Android Development, Kotlin, Compose, REST, JSON, State-Machines, Android Studio, IP Communication, Cybersecurity, Agile
Michael König
Last position:
Atruvia AG
- Further development of framework components and services in the Enterprise Banking Control Platform (EGP Framework), a set of cross-cutting libraries and services for all bounded context scopes of the platform.
- Migration from Java 17 to Java 21 and from Spring Boot 3.2 to 3.4 in about 80 library and service repositories (updating Maven POMs, Dockerfiles, Jenkins pipelines, source code migration, test updates).
- Writing unit and integration tests with JUnit and JGiven.
- Performing and analyzing performance measurements with Dynatrace.
- Enhancing multi-stage CI/CD pipelines (unit tests, security analyses, Docker builds, Harbor deployments, ...).
- Tech stack used: Java (90%), Python (10%), Spring Boot, JPA/Hibernate, JGiven, OpenAPI, Camunda 7, Podman, OpenShift/Kubernetes, Oracle DB, SonarQube, Dynatrace, Jenkins, Harbor, Bitbucket, Jira, Confluence.
Nikunjkumar Parmar
Last position:
Senior Java Backend Developer at Questax Professionals GmbH
- Provide the Price Listing Service Team Price for all cars and vans in different markets
- Adjust market-specific requirements like taxes, government subsidies, campaigns
- Import, synchronize and store new prices for all new and existing cars in Redis datastore
- Support our product and handle on-call duties
- Daily operations, developing new features, bug fixing
- Pair programming, code reviews, mob programming
- Develop POCs for new ideas
- Maintain and extend the backend
- DevOps tasks
- Perform Kubernetes updates
- Adjust and further develop Kubernetes resources
- Develop and customize Helm charts
- Adjust and update ArgoCD
- Maintain, adjust and further develop CI/CD pipelines
Vladimir Maznicenko
Last position:
Developer at Financial services provider
- Support and further development of a framework for developing applications in a banking association: DynS/OSPE
- Migration of the framework to Java 11 and Java 17
- Java8, Java11 and Java17, Spring, Spring-Batch, Spring WebServices, Spring-Security, Spring-Data, JPA, Hibernate, OpenSource libraries etc.
- XML, JAXB, JSON, REST and SOAP services, DB2, Oracle, WebSphere or Liberty AS, FreeMaker, Junit, mock libraries, JaCoCo, Maven, IntelliJ, Eclipse, GitHub, SVN, Jira
Elvir Büyükbayrak
Last position:
Software Architect and Software Developer at Noctica IT GmbH
- NocTime time tracking, workshop planner, meal delivery service app
- LLM-based chat bot to control the NocTime time tracking system via voice input
- New and further development of customer solutions based on the Noctica SAS app framework
- Technologies: Java 17, Spring Boot, JPA, Hibernate, JavaScript, TypeScript, Angular 20, Angular Material, React, C#, Docker, Bash, Git, GitLab, RedMine, SQL, DBeaver, MariaDB, PostgreSQL, Python, TensorFlow, Ollama, various LLMs
Anton Klonov
Last position:
Head of Technical Overall Integration NSC / Hadoop Cloud Development at IABG
Head of technical overall integration NSC (National Secure Cloud project with about 60 employees).
Technical integration of all subprojects into one product, definition of interfaces, basic components of a cloud including hardware, technical architecture of the IABG base.
Development of a Cloud Management Platform (CMP) that can create a private/mixed cloud of any complexity based on a textual description with one click or interactively.
CMP also includes the complete hardware management cycle.
As a foundation, it uses Kubernetes, OpenStack, and Hadoop.
The management layer includes Harbor, Gitea, Longhorn, Keycloak, Rancher and Jenkins, which are automatically configured.
The private cloud can run any customer workloads, including a full Hadoop stack with HDFS, Spark, MapReduce, Mesos, HBase and around 20 other ML/DL technologies.
Hadoop worker clusters can also be automatically installed on bare metal or commodity hardware without Kubernetes.
OpenStack with Nova, Neutron, Ironic, Swift, Cinder, Ceph.
Development of a Java application Rudi: SOAP, REST, containers, database.
Technologies: Kubernetes (K3s, RKE2, Minikube, Harbor, Gitea, Jenkins, Longhorn, Keycloak, Rancher), OpenStack (Nova, Neutron, Keystone, Swift, Ceph, Cinder, Sahara, Magnum, Kayobe, Kolla, Bigrost, Ironic), Hadoop (HDFS, Ambari, Solr, Livy, Ranger, YARN, Tez, HBase, Kafka, Hive, Zookeeper, MapReduce, Spark, Oozie, Flink), virtualization (Kubernetes (K3s), VMware, Oracle), scripting (Ansible, Puppet, Juju, Shell, Groovy, Gradle, Maven).
Jörg-Ulrich Hammerbacher
Last position:
Data flows for health insurance providers
- Further development and creation of data flows for health insurance providers
- Data management across various storage systems (DB2, MSSQL, PostgreSQL, S3, custom APIs, ...)
- Documentation and training
- Planning and deployment of NiFi 2.x (major upgrade)
- Integrating Grafana for visualization, monitoring, and alerting
- Extensive use of the NiFi API to continuously monitor the system and its components
Radoslav Yankov
Last position:
Senior Software Engineer at Radoslav Yankov – Software Engineering
Discover over 15,000 top freelancers
Statistics of experts using HSQLDB
Aggregated from the professional profiles of matched freelancers.
Experience
22 years
Position duration
1.5 years
Positions per freelancer
20
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Automotive, Banking and Finance
Certification focus areas
Information Technology, Product Development, Operations
Bachelor's degree or higher
88%
Master's degree or higher
75%
Doctorate
25%
Certifications per freelancer
3
Most common languages
German, English, Russian
Speak two or more languages
100%
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 HSQLDB
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
HSQLDB basics
HSQLDB, also known as HyperSQL or the HSQL Database Engine, is a lightweight relational database for Java systems. It is often used in-memory, as an embedded store, or as a small server for applications that need fast SQL access without heavy setup.
Where it fits
- Local development and automated tests
- Embedded data storage inside Java apps
- Temporary data stores for tools and services
- Small server setups for internal systems
It is a practical choice when teams need standard SQL, JDBC access, and simple deployment. In Germany, it often appears in enterprise Java projects, internal business tools, and test environments where quick setup matters.
Ecosystem skills
Strong professionals working with HSQLDB usually know JDBC, SQL, Java build tools, and schema migration workflows. They also understand how HyperSQL behaves in memory, on disk, and in server mode, and how to tune it for predictable startup and clean test isolation.
When to bring help
Bring in freelance expertise when a project uses HSQLDB in a legacy Java stack, when tests become fragile, or when schema changes need careful handling. Companies also look for help when moving from HSQLDB to another database, or when they need to keep old HyperSQL-based services stable while modernizing other parts.
What good specialists do
Good experts read existing SQL quickly, spot compatibility issues, and keep data access code simple. They write clean migration steps, fix connection and transaction problems, and make sure HSQLDB behaves the same in local, CI, and staging environments.
Alternative names
Searchers often use HSQLDB and HyperSQL as the same term, and some still refer to the older HSQL Database Engine name. A strong specialist knows these naming variants and can work across codebases that use any of them.
Frequently asked questions
What clients ask us most about HSQLDB — answered in short.
HSQLDB is used for embedded storage, local development, automated tests, and small SQL-backed services. It is a good fit when a Java application needs a relational database without the weight of a larger server setup. Many teams also use it for temporary data handling in tools and internal systems.
HSQLDB is usually chosen in Java-centric environments where JDBC and SQL compatibility matter. Compared with H2, it has a different feature set and migration behavior, so the best choice depends on the application and test setup. Compared with SQLite, it is more aligned with Java deployment patterns and server-style usage.
Yes, HyperSQL is the common name for HSQLDB, and many people use both names for the same database. You may also see the older HSQL Database Engine name in older projects or documentation. A freelancer who knows the naming history can move through legacy code faster.
A strong HSQLDB specialist should know SQL, JDBC, Java application structure, and schema changes. It also helps to understand testing patterns, transaction handling, and how embedded databases behave during startup and teardown. If the project is older, familiarity with legacy Java code is valuable too.
Most HSQLDB work depends on the surrounding Java application, not the database alone. A freelancer should see the schema, the data access layer, and any test or migration scripts before making changes. For older systems, access to past behavior and known issues is often just as important.
Yes, HSQLDB work is often well suited to remote collaboration because the main tasks are code, schema, and test related. For teams in Germany, remote work is common when requirements are clear and access to the Java repository is in place. On-site sessions can still help when a legacy system needs quick diagnosis.
Look for someone who can explain trade-offs clearly and adapt the database setup to the application, not the other way around. A strong HSQLDB expert writes clean SQL, avoids brittle test design, and handles embedded and server mode carefully. Good signs are practical fixes, clear migration steps, and stable results across environments.
Choose HSQLDB when the project needs a small relational database for development, tests, or a lightweight embedded use case. It is not the best answer for every production workload, especially when advanced scaling or operational tooling is required. A freelance specialist can help decide whether HSQLDB is the right fit or only a temporary layer.
The average hourly rate of freelancers in Germany who have used HSQLDB in their recent projects is 107 €, which corresponds to a daily rate of about 859 € based on an 8-hour working day.
Of the freelancers in Germany who have used HSQLDB in their recent projects, 88% hold at least a Bachelor's degree, 75% hold at least a Master's degree, and 25% hold a doctorate.
On average, freelancers in Germany who have used HSQLDB in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 1.5 years.
The most common languages among freelancers in Germany who have used HSQLDB in their recent projects are German (100%), English (92%), and Russian (17%).
The most common industries among freelancers in Germany who have used HSQLDB in their recent projects are Information Technology (100%), Automotive (67%), and Banking and Finance (67%).
The most common business areas among freelancers in Germany who have used HSQLDB in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (67%).
Main locations of FRATCH Experts, who have recently used HSQLDB
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 Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
