Quarkus Experts in Hamburg
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Meet FRATCH Experts in Hamburg, who have recently used Quarkus
Niko Schmuck
Last position:
Developing Architect, Technical Lead "gridlytics" at HH Energienetze
- Building a data integration platform for high, medium, and low voltage assets for contextual analysis of time series with master data from the SCADA control system (IEC 60870 104), INIS, and SAP.
- Responsibility for the architecture and implementation of the solution, as well as sparring partner for the Product Owner.
- Use of Kotlin, Spring Boot, Maven, TimescaleDB, PostgreSQL, liquibase, Elements IoT, Docker, Kubernetes, Grafana, Python, jupyter, and various API gateways.
Daniel Sedlack
Last position:
Senior Software Engineer at energielenker solutions GmbH
- Designed and implemented a Python-based ETL pipeline with the Dagster framework to transform raw energy data from heterogeneous sources using InfluxDB and visualizations in Grafana
- Defined time-based and dependency-based jobs
- Deployed to managed Kubernetes clusters using Helm
- Integrated InfluxDB Cloud
- Prepared data for use in Grafana, including cleaning, normalization, and time-based resampling in Python
- Developed dashboards and visualizations in Grafana
- Developed unit tests with mocking using pytest
- Set up a CI/CD pipeline in GitLab
Technologies: Python, Dagster, InfluxDB, Grafana, pandas, pytest, REST, CI/CD, GitLab, Container, Kubernetes, Helm, Docker, Cloud
Rainer Diekmann
Last position:
Enterprise Architecture Management / Backend Software Developer at Polizei Hamburg
- Several projects in a police context
- Model and document police procedures/projects with Archimate (as-is/to-be) in the context of P20 (BKA)
- Create software architectures with microservices
- POC development with Springboot/Docker/Kubernetes
- Project size: 10 people
- Enterprise architecture management with Togaf and Archimate
- Backend software development Springboot
- DevOps with Kubernetes
- Implemented using: Java 17/21, Springboot 3, P20 architecture, Togaf, Archimate
Oliver Langer
Last position:
Developer, Architect at libri GmbH
- Role: Developer, Architect
- Technologies: java, typescript, golang, spring (boot, web, security, data), Angular, AWS (OpenSearch, Aurora, SNS/SQS, CloudWatch, EC2, IAM), Kubernetes, Terraform, Helm, OAuth, Keycloak, CI/CD, gradlew, Liquibase, Test Driven Development, shell scripting
Mark Plaatsman
Last position:
Full-Stack Software Developer, Product Data Import at Otto (GmbH & Co KG)
- Manage and operate the product data import services for the Otto merchant
- Enhance and maintain the backend systems
- Optimize and maintain AWS infrastructure
- Build a new product data import API
- Design and plan stories and features
- Conduct code reviews to ensure code quality and best practices
- Analyze and fix bugs
- Technologies: Java, Spring Boot, Kafka, AWS, Fargate, Terraform, MongoDB, Mongo Atlas, OpenAPI, GitHub, GitHub Actions, GitHub Copilot, Akhq, Debezium, JUnit, Test Containers, Hexagonal Architecture
Christian Hartmann
Last position:
Software Developer / Lead Developer at dpa (Deutsche Presse Agentur GmbH)
- Contributed to the development of the Rubix editorial system
- Implemented various microservices based on Java, AWS S3, AWS SQS, AWS SNS, and Spring Boot, deployed to AWS ECS and AWS Fargate
- Designed and developed AWS Lambdas using TypeScript
- Used PostgreSQL in an AWS RDS Aurora cluster and AWS DynamoDB
- Implemented continuous deployment with GitLab pipelines
- Built an Infrastructure as Code environment with AWS CDK
- Set up and maintained a monitoring platform using AWS CloudWatch
- Developed various frontend components with Vue.js
- Designed the microservice architecture applying Domain Driven Design and GraphQL interfaces
Johannes Erchen
Last position:
Libri GmbH
- Operation and further development of the inventory system for booksellers (Quimus). It is an in-house development by Libri that is sold to customers as Software as a Service. The software is developed in an agile way by two developer teams (about 5 developers each). The software consists of around 25 Java microservices that mainly communicate via messaging and share a common Angular frontend. The application runs on Kubernetes in AWS.
- Technologies used: Java 17 & 21, Spring Boot 2 & 3, Hibernate, MySQL, Spring Cloud AWS, Lombok, AWS SQS, AWS SNS, AWS RDS, AWS S3, DynamoDB, Kubernetes, Docker, OpenSearch, Hibernate Search, Liquibase, Gradle, Terraform, Helm, GitLab CI, Keycloak OAuth2, TypeScript, Angular
- My focus until December 2023: Connecting additional POS systems to the inventory system. Connecting the data warehouse for report display. Extending existing features (goods receipts, invoicing, item management, ...). Operations and DevOps tasks.
- Focus from January 2024: Extracting the product search from the inventory system into a global service to use in other applications. Integrating the product search into the booksellers' online shops (also run by Libri). Importing and providing digital items in the product search.
Frank Wolf
Last position:
Fullstack Software Developer at Goodright GmbH
- Built backend APIs using Quarkus, Kotlin, MongoDB, Docker Compose and NGINX
- Developed frontend with React, TypeScript and Ant Design
Mirco Marahrens
Last position:
Senior Software Engineer at Vattenfall
- Lead of the platform engineering team for the development of a platform for energy trading, focusing on high availability, low latency, and scalability of libraries and services
- Supporting quants and market access solutions for energy trading, including market access integration and deployment of algorithmic trading strategies
Discover over 15,000 top freelancers
Statistics of experts using Quarkus
Aggregated from the professional profiles of matched freelancers.
Experience
22 years (Germany: 19 years)
Position duration
1.9 years (Germany: 1.8 years)
Positions per freelancer
21 (Germany: 14)
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Retail, Banking and Finance
Certification focus areas
Information Technology, Product Development, Business Intelligence
Bachelor's degree or higher
75% (Germany: 94%)
Master's degree or higher
50% (Germany: 52%)
Certifications per freelancer
1 (Germany: 4)
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 Hamburg 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 Hamburg using Quarkus
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
Fast Java cloud apps
Quarkus is a Java framework for cloud-native services, APIs, and event-driven systems. It is built for fast startup, low memory use, and clean deployment in containers and Kubernetes. Teams use it for new backend services, platform refactors, and lightweight integration layers.
What experts deliver
- REST endpoints and reactive services
- Native image builds with GraalVM
- Container and Kubernetes setups
- Testing, observability, and release support
- Migration from Spring Boot or older Java stacks
Ecosystem and tooling
Strong Quarkus work goes beyond the framework itself. Specialists use Maven or Gradle, JUnit, RESTEasy, Hibernate ORM, Panache, Kafka, and security extensions for OIDC or JWT. They also know how to tune build times, runtime settings, and dev mode for productive delivery.
When companies bring help
Companies usually call in freelance Quarkus experts when a service must start quickly, use less memory, or fit a container platform cleanly. In Hamburg, this often comes up in logistics, commerce, media, and enterprise IT teams that need stable Java services without long hiring cycles. Remote work is common, but on-site sessions help with architecture reviews and handover.
What strong specialists do
Good Quarkus professionals make practical choices. They keep code simple, separate business logic from framework code, and design services that are easy to test and operate. They also understand when to use classic JVM mode and when native compilation makes sense.
Signs you need Quarkus
If your current Java stack feels heavy, slow to start, or hard to package for cloud runtime, Quarkus may be the right fit. It also helps when your team needs a modern backend that works well with Kafka, OpenAPI, and Kubernetes. For Hamburg projects, clear English is often enough for daily work, with German helpful in stakeholder meetings.
Frequently asked questions
Not sure where to start with Quarkus? These answers cover the essentials.
Quarkus is used to build cloud-native Java services, REST APIs, integration layers, and event-driven backends. It is a strong fit when startup time, memory use, and container readiness matter. Many teams also use it for microservices that need clean operations in Kubernetes.
Quarkus is often chosen for lean runtime behavior and fast startup, especially in containerized environments. Spring Boot is still common for broad ecosystem familiarity, so the choice depends on your existing stack and delivery goals. A strong specialist can explain the trade-offs without pushing one framework by habit.
A good Quarkus specialist should know Java well and be comfortable with REST, security, testing, and build tools like Maven or Gradle. Experience with Kafka, Hibernate ORM, OpenAPI, and Kubernetes is often useful. For native builds, knowledge of GraalVM matters a lot.
Not always, but the task matters. A focused Quarkus fix, such as an endpoint or a configuration change, can be handled by a specialist with solid framework knowledge. Bigger work, like a migration or native image tuning, needs broader experience across runtime, packaging, and operations.
Yes, remote work is common for Quarkus projects in Hamburg and beyond. It works well for implementation, testing, and documentation when the setup is clear. On-site time can still help during kickoff, architecture workshops, or handover with local teams.
Ask which Quarkus extensions they have used, how they handle tests, and whether they have shipped containerized services before. If native images matter, ask about GraalVM and runtime troubleshooting. You want concrete project examples, not general Java talk.
Look for clear code, good tests, and simple architecture. A strong Quarkus professional can explain why a service runs well in JVM mode or native mode, and how it will be operated after release. Good signs are practical decisions, clean handover, and careful attention to security and observability.
Yes, Quarkus works well when an enterprise team wants modern Java with lighter runtime behavior. It fits APIs, internal services, and integration work where container delivery is part of the plan. It is especially useful when the existing Java landscape needs a more cloud-ready path.
The average hourly rate of freelancers in Hamburg, Germany who have used Quarkus in their recent projects is 97 €, which corresponds to a daily rate of about 777 € based on an 8-hour working day.
Of the freelancers in Hamburg, Germany who have used Quarkus in their recent projects, 75% hold at least a Bachelor's degree and 50% hold at least a Master's degree.
On average, freelancers in Hamburg, Germany who have used Quarkus in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Hamburg, Germany who have used Quarkus in their recent projects are German (100%), English (100%), and French (11%).
The most common industries among freelancers in Hamburg, Germany who have used Quarkus in their recent projects are Information Technology (100%), Retail (78%), and Banking and Finance (67%).
The most common business areas among freelancers in Hamburg, Germany who have used Quarkus in their recent projects are Information Technology (100%), Product Development (100%), and Business Intelligence (89%).
Main locations of FRATCH Experts, who have recently used Quarkus
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.
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Philipp Thomaschewski
FRATCH CEO
