Jakarta Persistence (JPA) Experts in Vienna
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Meet FRATCH Experts in Vienna, who have recently used Jakarta Persistence (JPA)
John A.
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 M.
Last position:
OpenShift / Kubernetes Consultant at cloudWerkstatt
Implementation and operation of OpenShift / Kubernetes solutions for customers, focusing on aspects such as storage, virtualization, security, logging, monitoring, and high availability. Support with application containerization and modernization.
Javid A.
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
Joseph W.
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 D.
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.
Aaron H.
Last position:
Career Break
- Big move, focus on DIY hobbies, small personal software projects.
Monji M.
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
Üsame T.
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"
Discover over 15,000 top freelancers
Statistics of experts using Jakarta Persistence (JPA)
Aggregated from the professional profiles of matched freelancers.
Experience
21 years
Position duration
2.8 years
Positions per freelancer
9
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Insurance, Transportation
Certification focus areas
Information Technology, Business Intelligence, Product Development
Bachelor's degree or higher
71%
Master's degree or higher
57%
Certifications per freelancer
5
Most common languages
German, English, French
Speak two or more languages
100%
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Vienna are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Vienna using Jakarta Persistence (JPA)
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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Jakarta Persistence (JPA) experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (100%)
- Insurance (75%)
- Transportation (63%)
- Government and Administration (63%)
- Telecommunication (50%)
- Automotive (25%)
- Healthcare (25%)
- Professional Services (25%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What JPA is
Jakarta Persistence (JPA) is the standard Java specification for mapping application objects to relational database tables. It defines entity management, relationships, transactions and query APIs, while implementations such as Hibernate provide the runtime behavior. JPA was formerly known as Java Persistence API and is now part of the Jakarta EE ecosystem.
What it builds
JPA supports the data layer of business applications that need consistent access to relational databases. It is common in enterprise systems, financial services, logistics, healthcare software and public-sector applications where domain models, transactions and long-term maintainability matter.
- Model entities and relationships
- Persist and retrieve transactional data
- Implement JPQL and Criteria queries
- Connect Spring Boot services to databases
Ecosystem and tooling
Strong JPA specialists work across Hibernate, EclipseLink and Jakarta EE, and understand how JPA fits with Spring Data JPA, Spring Boot and application servers. They use PostgreSQL, MySQL, Oracle Database or Microsoft SQL Server, alongside Maven or Gradle, Flyway or Liquibase, and database migration workflows. SQL knowledge remains essential because JPA does not remove the need to understand the database.
When companies need help
Freelance expertise is useful when a persistence layer is slow, difficult to change or becoming unreliable under real transaction loads. Companies in Vienna often bring in specialists for modernization, service extraction, production troubleshooting or integration work across distributed business systems.
- Replace legacy persistence code
- Resolve N+1 queries and fetch-plan issues
- Refine transactions and locking
- Review schema and entity design
What strong professionals deliver
Effective JPA professionals begin with the domain model and database design, then make mapping decisions that support both. They distinguish lazy and eager loading, understand cascading and orphan removal, and choose inheritance strategies deliberately. They also inspect generated SQL, execution plans, connection pools and transaction boundaries instead of relying on abstractions alone.
Choosing the right specialist
Look for evidence of production work with the relevant JPA implementation, database and application framework. A strong specialist can explain trade-offs between JPQL, native SQL and repository abstractions, test persistence behavior with realistic data, and document migration risks. For remote collaboration or on-site work in Vienna, clear communication with application, database and delivery teams is just as important as technical depth.
Frequently asked questions
Curious about Jakarta Persistence (JPA)? Here are the answers that come up again and again.
Jakarta Persistence (JPA) is used to map Java objects to relational database records and manage their lifecycle. It supports entity relationships, transactions, JPQL queries and persistence contexts in enterprise applications. Hibernate and EclipseLink are common implementations.
Jakarta Persistence (JPA) provides object-relational mapping and handles much of the repetitive persistence code. JDBC offers lower-level control, while jOOQ gives teams a strongly typed SQL-oriented approach. The right choice depends on query complexity, domain modeling needs and the amount of database-specific behavior required.
Jakarta Persistence (JPA) work benefits from strong SQL, relational database design and transaction management skills. Relevant adjacent knowledge includes Hibernate, Spring Data JPA, Spring Boot, database migrations, testing and performance analysis. Familiarity with REST services and distributed systems is also valuable in larger applications.
The required depth depends on the assignment. A contained entity mapping task may need focused Jakarta Persistence (JPA) knowledge, while production performance work requires experience with generated SQL, locking, connection pools, migrations and failure handling. Ask for examples involving a similar database and application context.
Jakarta Persistence (JPA) projects are often suitable for remote collaboration because mappings, queries and tests can be reviewed through shared repositories and development environments. On-site work in Vienna can help when specialists must coordinate closely with local product, database or compliance teams. Agree on documentation, working hours and communication language early.
Ask how the specialist investigates slow queries, manages transaction boundaries and prevents excessive loading. A capable Jakarta Persistence (JPA) professional should discuss entity design, SQL inspection, test data and database execution plans rather than describing mapping annotations alone.
Jakarta Persistence (JPA) may be a poor fit when an application is dominated by highly specialized SQL, heavy reporting queries or database-specific features. In those cases, JDBC, jOOQ or carefully designed native queries may provide clearer control. A mixed approach is also possible when standard entity operations coexist with specialized read models.
Freelancers can demonstrate quality by showing how they model relationships, test transaction behavior and measure generated SQL. Strong Jakarta Persistence (JPA) professionals explain trade-offs around fetching, cascading, inheritance and bulk operations, and they leave clear migration and maintenance guidance for the team.
The average hourly rate of freelancers in Vienna, Austria who have used Jakarta Persistence (JPA) in their recent projects is 91 €, which corresponds to a daily rate of about 730 € based on an 8-hour working day.
Of the freelancers in Vienna, Austria who have used Jakarta Persistence (JPA) in their recent projects, 71% hold at least a Bachelor's degree and 57% hold at least a Master's degree.
On average, freelancers in Vienna, Austria who have used Jakarta Persistence (JPA) in their recent projects have 21 years of professional experience, with a single engagement typically lasting around 2.8 years.
The most common languages among freelancers in Vienna, Austria who have used Jakarta Persistence (JPA) in their recent projects are German (100%), English (100%), and French (25%).
The most common industries among freelancers in Vienna, Austria who have used Jakarta Persistence (JPA) in their recent projects are Information Technology (100%), Insurance (75%), and Transportation (63%).
The most common business areas among freelancers in Vienna, Austria who have used Jakarta Persistence (JPA) in their recent projects are Information Technology (100%), Product Development (100%), and Operations (50%).
Main locations of FRATCH Experts, who have recently used Jakarta Persistence (JPA)
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.
Countries:
Vienna 
Graz Request a free demo
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