JVM Experts in Germany
in minutes from over 15,000 CVs with the power of AI.Hire experts who build and tune Java and Kotlin services, keep JVM apps stable under load, and solve performance, memory, and deployment issues. Fast, precise matching with vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used JVM
Priyanka Sarang
Last position:
Business Consultant (Software Engineering) at Boehringer Ingelheim
- Developed cloud-native enterprise applications on SAP Business Technology Platform using Node.js, SAP UI5, and RESTful APIs, delivering solutions across training management, procurement, employee information, and logistics domains
- Served as the primary developer for the maintenance, enhancement, and production support of three enterprise applications, delivering new features, resolving production issues, and coordinating releases with business stakeholders
- Experienced in leveraging AI-assisted development tools such as Microsoft Copilot to accelerate feature development, generate code, prototype solutions, and support application migration and modernization
- Designed backend services, domain models, and SAP Fiori/UI5 interfaces, implementing business workflows, role-based access control, validations, scheduling, reporting, and data import/export capabilities
- Designed and integrated enterprise services with SAP SuccessFactors, SailPoint, ERP systems, and external Learning Management APIs, including automated synchronization for 11,000+ user data
- Designed and implemented AMQP-based event-driven services processing up to 500 RFID parcel scan events per day for a logistics application
- Managed deployments and application operations using CI/CD pipelines, SAP Solution Manager, SAP BTP Cockpit, Kibana, and cloud monitoring tools, performing root-cause analysis and resolving production incidents
- Managed application dependencies by resolving npm package version conflicts and remediating critical and high-severity security vulnerabilities, ensuring production compliance and application stability
- Collaborated with architects, business users, SAP governance teams, and distributed Agile teams throughout technical design, code reviews, sprint planning, documentation, and software delivery
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
Muthukumar Kusalavan
Last position:
Senior Java Backend Developer at Upwork
- Developed Java 21 / Spring Boot 3.2 microservices with REST and GraphQL APIs for GDPR-compliant consent workflows using Hexagonal Architecture
- Enhanced Backend-for-Frontend (BFF) performance using AI-assisted tools for code refactoring and optimization
- Built event-driven workflows with Kafka, RabbitMQ, AWS SQS, and integrated Salesforce Marketing Cloud for real-time consent tracking
- Implemented OAuth2 and Keycloak security, automated CI/CD with Jenkins, GitHub Actions, and Gradle, and deployed containerized services on Docker and Kubernetes with AWS and Azure
- Executed unit, integration, and contract testing with JUnit 5, TestNG, Mockito, and TestContainers; monitored performance via Grafana, Kibana, and AWS CloudWatch
- Developed microservices for digital identity verification and e-signature management with Hexagonal Architecture
- Integrated Keycloak 24.x with OAuth2.1 and OpenID Connect for SSO and RBAC, ensuring EU eIDAS compliance
- Designed API-first microservices with OpenAPI 3.1, Swagger, and GraphQL for improved interoperability
- Automated CI/CD pipelines with Jenkins, GitHub Actions, and Gradle; deployed containerized services on AWS EKS and Azure; monitored with Grafana, Kibana, CloudWatch, and TestContainers
Mahabub Akram
Last position:
Team Lead – Engagement & Relevance at OLX eCommerce
- Lead a cross-functional squad of backend, frontend, and ML/data engineers, balancing hands-on contribution (architecture, coding, reviews) with team leadership (mentoring, backlog prioritization, roadmap alignment).
- Designed and delivered ML-powered search and discovery features, including Learning-to-Rank (LTR), query expansion, and vector search, improving result relevance and user engagement.
- Implemented personalization and recommendation pipelines, using behavioral data and segmentation to increase customer retention and lifetime value.
- Established data-driven practices, building A/B testing and experimentation workflows (Odyn, MLflow) to measure feature impact on CTR, NDCG, and conversion.
- Owned the squad’s architecture and delivery roadmap, modernizing services with cloud-native microservices and event-driven systems (AWS, Pulumi, Terraform) to improve scalability and reliability.
- Improved reliability and operational excellence, introducing observability (Prometheus, Grafana, NewRelic), incident management, and postmortems that reduced downtime for customer-facing services.
- Mentored and supported engineers, fostering technical growth, collaboration, and a customer-first mindset through regular feedback, coaching, and code reviews.
- Worked closely with product managers, researchers, and business stakeholders to translate customer insights into technical solutions that improved discovery, engagement, and retention.
- Explored Generative AI/LLM use cases (GPT-4, LangChain, RAG), prototyping intelligent assistants and personalized discovery workflows that increased user satisfaction.
- Delivered tangible results: boosted engagement through personalization, contributed to revenue uplift, and reduced incidents by embedding resilience and observability.
Olaf Titel
Last position:
CTO, Partner, Agile Coach, Product Owner at fluidx digital GmbH
- Development and launch of a browser-based platform for camera streaming, augmented reality (AR), and visual computing
- Device-independent camera streaming for smartphones, tablets, desktop PCs, as well as VR and AR headsets
- Ensuring GDPR-compliant hosting in Open Telekom Cloud and other sovereign cloud providers
- Intuitive visual and collaborative features to boost efficiency and seamlessly integrate into existing enterprise software
Alexey Gravanov
Last position:
Cloud Architect & DevOps, Head of Architecture at ProSiebenSat.1 Digital GmbH / Seven.One Entertainment Group GmbH
- Co-authored enterprise cloud strategy including security and governance frameworks for 5 subsidiaries, and implemented part of the governance automation.
- Performed regular cloud cost optimization reviews across 10 teams resulting in ~20% cost reduction.
- Led the technology selection for the migration of in-house CIAM for 25M+ accounts to a SaaS solution, and worked with the product team through the migration.
- Supervised the technology selection and designed the architecture and delivery pipelines for the multi-tenant digital news and sports publishing platform, enabling ~250 editors within ~6 months of development start.
- Led the implementation of a multi-brand design system from idea and technical concept to implementation and rollout, enabling rapid UI prototyping for new products in a matter of hours.
- Managed a team of 4 architects and accelerated the professional growth of team members.
- Technologies: AWS cloud, Microservices, Docker, Python, Kafka, JavaScript, TypeScript, React.js, Node.js, GraphQL, REST, Gitlab CI, Visual Studio Code, git.
Nils Meyer
Last position:
Database Architecture for PostgreSQL at ComputaCenter / Deutsche
- Planning and documentation of database architecture and integration with other components provided by other teams and vendors
- Extensive documentation for the architecture, security, access control, encryption, roles and user management, backup and restore, disaster recovery and general operations
- Deployment of database clusters over 2 locations with 2 availability zones each
- Automation of deployment and operations including backup using Ansible
- Hardening of the database and operating system
- Migration of existing stand-alone database systems to cluster setup
- Technologies: PostgreSQL, Patroni, etcd, barman, RedHat Enterprise Linux 9 (RHEL), Ansible, Ansible Automation Platform, TLS, Hashicorp Vault, LUKS
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).
Andreas Kraus
Last position:
Senior Developer at ioki GmbH, a Deutsche Bahn AG company
- Fullstack development based on Next.js and TypeScript
- Development and optimization of geospatial database queries for PostgreSQL/PostGIS
- Visualization of geospatial data using Mapbox
- Design and execution of load tests and performance optimizations
- Code reviews and documentation tasks
- Technologies: JavaScript, TypeScript, Next.js, React, Zod, tRPC, Storybooks, PostgreSQL/PostGIS, MicroORM, Knex, Material UI, Mapbox, BullMQ, Jest, Playwright, Artillery.io, K6, Sentry, Figma, GitLab, Grafana, GTFS
Immanuel Bekaan
Last position:
Senior Full-Stack Developer at SCHUFA Holding AG
- Further development of features with React
- Integration of React applications with GraphQL
- Migration of AWS Lambdas based on Kotlin to TypeScript
- Advising the team on migration strategy for moving to serverless applications
- Preparing for the go-live of various projects (quality assurance, deployment, monitoring)
- Deployment of applications with AWS Amplify, AWS Lambda and GitHub Actions
- Technologies: AWS (Lambda, DynamoDB, CDK, Amplify, CloudWatch), React, Kotlin, TypeScript, Cypress, Selenium
- Methodology: Agile development with Scrum, Kanban
Norbert Harisch
Last position:
Self-employed
- Support in controlling
- Support in finance
- Support in marketing
- Online training
Discover over 15,000 top freelancers
Statistics of experts using JVM
Aggregated from the professional profiles of matched freelancers.
Experience
20 years
Position duration
2.1 years
Positions per freelancer
12
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Automotive
Certification focus areas
Information Technology, Business Intelligence, Logistics
Bachelor's degree or higher
100%
Master's degree or higher
75%
Doctorate
25%
Certifications per freelancer
2
Most common languages
English, German, Spanish
Speak two or more languages
91%
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 JVM
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 the JVM does
The JVM is the runtime that executes Java bytecode and supports languages like Kotlin, Scala, and Groovy. Companies use it for backend services, APIs, batch jobs, streaming systems, and internal tools that need portability and predictable behavior across environments.
Common delivery work
- Build and maintain Java and Kotlin services
- Debug memory leaks, slow startup, and GC pressure
- Package and run services in Docker or Kubernetes
- Review bytecode, dependencies, and runtime compatibility
- Stabilize legacy systems during upgrades
Ecosystem and tools
Strong JVM specialists work across Spring Boot, Micronaut, Quarkus, Gradle, Maven, JUnit, and profiling tools. They understand garbage collection, threading, class loading, and observability so they can connect code changes to real runtime behavior.
When companies bring help
Teams usually ask for freelance JVM expertise when a release is blocked by production issues, a service is too slow, or an upgrade needs careful planning. In Germany, this often comes up in enterprise software, finance, logistics, manufacturing, and other systems where Java remains central.
What strong specialists do
A good JVM professional reads stack traces quickly, traces bottlenecks to the right layer, and keeps changes safe in production. They write clear tests, handle dependency conflicts, and explain trade-offs between throughput, latency, and memory use without hand-waving.
What to look for
- Experience with your main framework and build tool
- Practical profiling and debugging habits
- Clear work on performance, reliability, and upgrades
- Comfort with code review and production support
- Ability to work remote or with local teams when needed
Frequently asked questions
Everything clients usually want to know about JVM, in one place.
JVM work is at the core of many backend systems, batch processes, message consumers, and data-heavy services. It runs Java bytecode and also supports Kotlin, Scala, and other languages that target the same runtime. Companies choose it when they want stable services, a mature ecosystem, and broad library support.
The first thing to know is that JVM is a runtime, not a framework, so it often sits underneath Java or Kotlin services rather than replacing them. Compared with Node.js, it is usually chosen for stricter type systems, stronger enterprise tooling, and mature concurrency support. Compared with .NET, the decision often comes down to existing stack, library fit, and team experience.
A strong JVM specialist often works with Java, Kotlin, Scala, Groovy, Spring Boot, Gradle, Maven, JUnit, and observability tools. For many projects, Docker and Kubernetes also matter because the runtime must behave well in containers. Understanding garbage collection and threading is just as important as writing code.
You usually need JVM expertise when a service is slow, memory use is unclear, deployment behavior changed after an upgrade, or a legacy codebase is risky to touch. It also helps when you are moving from one language level or framework version to another and need the change to stay safe. The more production traffic you have, the more valuable deep runtime knowledge becomes.
Yes, JVM work is very remote-friendly because most tasks can be handled through source control, issue tracking, logs, and profiling data. For teams in Germany, on-site work can help with discovery, sensitive systems, or workshops, but it is rarely required for the full engagement. Clear communication in English is often enough, while German can help in larger enterprises.
Look for evidence that a JVM freelancer can explain production issues in plain language and connect symptoms to causes. Good signs include solid test coverage, careful dependency management, experience with profiling, and a history of fixing hard runtime problems rather than only writing features. Ask how they handle memory leaks, thread contention, and compatibility breaks.
A strong JVM professional usually knows SQL, REST APIs, CI/CD, containers, cloud basics, and monitoring. If the role touches older systems, experience with application servers, message brokers, and migration work matters too. These skills help the specialist work across the full service lifecycle, not just the code.
Yes, JVM hiring often includes Kotlin because many modern services run on the same runtime. Java still dominates large enterprise systems, but Kotlin is common in newer services and in teams that want concise code with full JVM compatibility. A good specialist should be comfortable moving between both when the project needs it.
The average hourly rate of freelancers in Germany who have used JVM in their recent projects is 91 €, which corresponds to a daily rate of about 729 € based on an 8-hour working day.
Of the freelancers in Germany who have used JVM in their recent projects, 100% 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 JVM in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 2.1 years.
The most common languages among freelancers in Germany who have used JVM in their recent projects are English (100%), German (91%), and Spanish (18%).
The most common industries among freelancers in Germany who have used JVM in their recent projects are Information Technology (91%), Banking and Finance (82%), and Automotive (55%).
The most common business areas among freelancers in Germany who have used JVM in their recent projects are Information Technology (100%), Product Development (82%), and Quality Assurance (64%).
Main locations of FRATCH Experts, who have recently used JVM
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
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
