Jakarta Persistence Experts in Austria
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Meet FRATCH Experts in Austria, who have recently used Jakarta Persistence
John Ampia-Addison
Last position:
Software Developer and DevOps Engineer at Bundesrechenzentrum (BRZ)
Refactoring and improving core APIs; implementing client change requests. Setting up metrics, traces, and logs monitoring infrastructure to support operations. Designing GitOps deployment and infrastructure as code. Applications and Systems Configuration in ArgoCD and Openshift. Confluence documentation of design, approach, and solution. Tech Stack: Java 8 & 21, Spring framework, JSP, Javascript, Bash Scripts, SQL, Grafana Stack, Opentelemetry, Docker, DB2, Maven, Kubernetes Kompose.
Michail Matjuchin
Last position:
OpenShift Specialist, Developer at Insurance
Project goal: Introduce OpenShift as the run-time platform and migrate all applications to OpenShift.
My contribution: Make sure logging and monitoring for the applications were in place. Set up and put into operation the OpenShift components for logging and monitoring (Elasticsearch, Prometheus, and Grafana). Develop and implement the security concept for OpenShift. Work with developers to define and carry out the application changes needed for the OpenShift migration. Integrate monitoring into the applications.
Technical environment: Java, WebSphere Liberty, OpenShift components, Elasticsearch (ELK stack), Prometheus, Grafana.
Peter Stritzinger
Last position:
Lead Software Architect at Pritz IT GmbH
- Lead software architect in a greenfield MES project (Manufacturing Execution System / factory control system), responsible for architecture decisions, technology selection, and technical direction throughout the entire development lifecycle
- Designed and built the core framework from scratch, including several reusable Spring Boot starters (e.g., OPC-UA integration, messaging, security) that enable flexible composition of the individual system modules
- Introduced Keycloak as the central authentication and authorization system with SSO across all MES components
- Created and owns the full CI/CD pipeline covering Java, NPM and Docker – automating build, test, containerisation and deployment across all project components
- Set up the architecture documentation space in Confluence as the single source of truth for all architecture decisions, component designs, and integration patterns
- Defined and enforced naming conventions and coding standards to ensure consistency in the growing codebase
- Conducted regular code reviews for quality assurance, knowledge sharing, and adherence to architecture guidelines
- Created and maintained technology roadmaps to guide future development priorities and infrastructure investments
Üsame Turhan
Last position:
Java Backend Developer at Porsche Informatik
- Java EE 8 development
- Java 21 and Spring Boot 3 microservices development
- Release management
- Onboarding of new team members
- Owner of an team-internal "Best Code Engineering Award"
Joseph Wagner
Last position:
Freelancer Cloud / Solution Architect (AWS) at A1 Bank
- I am responsible for providing solution architecture and technical assistance for a migration initiative aimed at transitioning to a new core banking system.
- The project involves replacing in-house development with a commercially available off-the-shelf core banking system operated as SaaS on AWS.
- Duties encompass solution design, technical coordination, supporting development teams, and providing IT support and troubleshooting.
- Managing over 10 global vendors and partners is crucial to project success.
- Technologies: VMWare ESXi, AWS, EKS Kubernetes, Mastercard Payment Transaction Service, Avaloq, A1 Telekom Austria infrastructure, CheckPoint FW, F5, Site-to-Site VPNs, PingID, Futurae SDK, Airlock, UC4/Automic, Firebase, iOS/Android lifecycle management, AWS IAM, AWS AppStream, AWS S3, AWS Transfer Family, QlikView, OpenAPI.
Attila Danics
Last position:
Full-Stack Software Engineer at Research Data Evaluation
- Custom anonymized research data analyzer, providing insights and facilitating data-driven decision-making.
- Designed and developed back- and frontend.
- Delivered end-to-end solution.
- Accelerated research timeline by 2 months.
Javid Asgarov
Last position:
B2B Contract - Senior Fullstack developer (Java + Angular)
- Project: E-Platform with 100k users
- Skills: Java, Spring, Spring Boot
- TechStack: Angular 18, Java 17, Spring Boot, Oracle DB, Spring Data, JPA, Hibernate, Oracle, Postgres, SQL
Jaroslav Abraham
Last position:
Child care, personal development and learning
Aaron Heimel
Last position:
Career Break
- Big move, focus on DIY hobbies, small personal software projects.
Monji Midani
Last position:
Senior Software Developer at AMA Wien
IT concept
Implementation
Estimation
Design
Installation
Oracle APEX applications for farmers in Austria to register their products and get subsidies.
Implement new applications or adapt existing applications according to customer requirements (CR)
Fix bugs
Update data in the database
Install applications
Technologies/methods used: Oracle DB, PL/SQL, DM, Oracle Apex, JavaScript, CSS, OpenLayers, GIT
Florian Jurkic
Last position:
Senior Android Consultant at Bragi GmbH
- Working within a cross-functional team developing upgrades for in-app features
- Android app development since 2016
- App: Skull IQ & many more
Discover over 15,000 top freelancers
Statistics of experts using Jakarta Persistence
Aggregated from the professional profiles of matched freelancers.
Experience
22 years
Position duration
2.9 years
Positions per freelancer
8
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Insurance, Transportation
Certification focus areas
Information Technology, Project Management, Business Intelligence
Bachelor's degree or higher
70%
Master's degree or higher
40%
Certifications per freelancer
3
Most common languages
German, English, French
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 Austria 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 Austria using Jakarta Persistence
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
What it covers
Jakarta Persistence, also known as JPA, is the standard API for object-relational mapping in Java and Jakarta EE systems. It helps specialists map entities to tables, manage relationships, and keep database access consistent across services, modules, and business applications.
Typical work
- Entity and relationship mapping
- JPQL and Criteria API queries
- Transactions and persistence context handling
- Repository integration in Spring Boot
- Migration from older Java EE or Hibernate-based setups
Tooling and stack
Strong professionals usually work with Hibernate, EclipseLink, and the Jakarta EE stack around them. They also understand schema design, SQL, database indexes, lazy loading, caching, and how to keep the persistence layer readable under change.
When to bring in help
Companies look for freelance specialists when a data model has become fragile, queries are slow, or a migration needs careful mapping updates. In Austria, this often comes up in enterprise software, finance, logistics, and public-sector systems that need stable Java data access and clear handover.
What good experts do
Good JPA experts do more than write annotations. They spot N+1 query problems, choose the right fetch strategy, protect transaction boundaries, and align code with database constraints so teams get predictable behavior in production.
What to expect
- Clean entity design and inheritance strategy choices
- Reliable repository and transaction patterns
- Performance fixes for complex object graphs
- Support for legacy Java persistence code
- Documentation that helps internal teams continue the work
Frequently asked questions
Everything clients usually want to know about Jakarta Persistence, in one place.
Jakarta Persistence is used to map Java objects to relational databases. It defines how entities, relationships, queries, and transactions work in a Jakarta EE or Spring-based application. Teams use it when they want a structured persistence layer instead of hand-written database access everywhere.
JPA is a specification, not a single product. Hibernate is the most common implementation, and EclipseLink is another major one. If a project says it needs JPA, the work often involves one of those implementations plus the standard API and query model.
A company usually brings in JPA expertise when entity mappings have become hard to maintain, queries are slow, or a migration is risky. It also helps when a team needs better transaction handling, cleaner repository code, or support for a legacy Java EE system.
A strong Jakarta Persistence specialist should also know SQL, schema design, transaction management, and one of the common Java stacks such as Spring Boot or Jakarta EE. Knowledge of Hibernate internals, database indexing, and testing with real persistence behavior is a big plus.
Most JPA work needs access to the entity model, the database schema, and a few critical use cases. Without that context, it is hard to judge fetch strategies, cascading, or whether a query change could affect data consistency. Good specialists ask for that early.
Most Jakarta Persistence work can be done remotely because the main tasks are in code, queries, and design reviews. On-site time can help at the start if the team needs workshop sessions for domain modeling or if there is a sensitive migration in Austria. After that, remote collaboration is usually enough.
Look for clear entity models, careful use of relationships, and a practical approach to query design. A good JPA professional can explain why a fetch type, cascade setting, or transaction boundary was chosen, and they can spot performance issues before they reach production.
The most common issues are overly complex mappings, hidden lazy loading problems, and queries that do too much work. With Jakarta Persistence, quality depends on balancing object design with database reality. Strong specialists keep that balance visible in the code and in the team’s conventions.
The average hourly rate of freelancers in Austria who have used Jakarta Persistence (JPA) in their recent projects is 91 €, which corresponds to a daily rate of about 726 € based on an 8-hour working day.
Of the freelancers in Austria who have used Jakarta Persistence (JPA) in their recent projects, 70% hold at least a Bachelor's degree and 40% hold at least a Master's degree.
On average, freelancers in Austria who have used Jakarta Persistence (JPA) in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 2.9 years.
The most common languages among freelancers in Austria who have used Jakarta Persistence (JPA) in their recent projects are German (100%), English (100%), and French (18%).
The most common industries among freelancers in Austria who have used Jakarta Persistence (JPA) in their recent projects are Information Technology (100%), Insurance (73%), and Transportation (45%).
The most common business areas among freelancers in Austria who have used Jakarta Persistence (JPA) in their recent projects are Information Technology (100%), Product Development (100%), and Operations (45%).
Main locations of FRATCH Experts, who have recently used Jakarta Persistence
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.
Vienna Graz 
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Philipp Thomaschewski
FRATCH CEO
