Apache Solr Experts in Berlin
matched in minutes with vetted, available specialistsHire experts who design search platforms, tune relevance and scale distributed indexes with Apache Solr, Apache Lucene and SolrCloud. FRATCH matches you quickly and precisely with vetted, available freelancers for your project.
Meet FRATCH Experts in Berlin, who have recently used Apache Solr
Alexander Z.
Last position:
Senior Data Solutions Engineer at VMware Inc.
- Architected and deployed private cloud data platform on VMware vSphere, integrating Greenplum MPP, Apache Kafka, Kubernetes, and Apache Solr, and developed real-time ingestion pipelines with Kafka Connect and Schema Registry.
- Led Oracle Exadata to Greenplum migration, rearchitected data models, optimized storage, implemented RabbitMQ with Debezium for CDC, and deployed VectorDB for Generative AI.
- Designed and executed multi-cloud migration PoC across AWS, Azure, and GCP, defined KPIs for throughput, latency, and cost efficiency, executed bulk data transfers, validated analytics and streaming workloads, and delivered full-scale architecture recommendations.
- Assessed legacy on-premises infrastructure and designed modern cloud-native data platforms using Greenplum and containerized microservices, advising on scalability, disaster recovery, and high-availability.
Rüdiger S.
Last position:
Full-Stack Software Engineer / Consultant for Digitalization at ARTEVENT
Designed, built, and launched an internal event planning web application used by over 100 department leads for a large event, despite having no dedicated testing phase.
Ensured smooth, failure-free operation during first production use, leading to the tool being adopted for future events.
Automated catering calculations and related workflows, significantly reducing email communication and manual computation effort for meal planning.
Managed deployment and hosting on a Linux server using Coolify, including application setup and runtime operations.
Hired and guided a communication designer on UX while independently owning all technical decisions and implementation.
Nikunjkumar P.
Last position:
Senior Java Backend Developer at Questax Professionals GmbH
- Provide the Price Listing Service team with prices for all cars and vans in different markets
- Adapt market-specific requirements such as taxes, government subsidies, campaigns
- Import and synchronize new prices for all new and existing cars and store them in the Redis datastore
- Support our product and on-call duty
- Daily business, development of new features, bug fixing
- Pair programming, code review, mob programming
- Develop POCs for new ideas
- Maintain and extend the backend
- DevOps tasks
- Run Kubernetes updates
- Adjust and further develop Kubernetes resources
- Develop and adapt Helm charts
- Adapt and update ArgoCD
- Maintain, adapt, and improve CI/CD
Pawel G.
Last position:
Senior Consultant & Drupal 10 Architect at Stiftung Jüdisches Museum Berlin
- Planning and development of jmberlin.de, the digital platform of the Jewish Museum Berlin, a central place for history, education, and social dialogue
Salar M.
Last position:
Project management and tutor at LLMs Learning Journey
- Designed and managed an upskilling academy for Deutsche Telekom.
Henning P.
Last position:
Backend Systems Development at Deutsche Bank/DWS/Morgenfund
- Developed backend systems for the DWS Investment App, a white-label investment solution (robo-advisor), and an investment solution for institutional clients.
- Java 8-17, Kotlin, Spring Boot, Spring MVC, OpenAPI 3.0, JPA, JDBI, Oracle, Hazelcast, JXLS, Apache POI, Apache PDFBox, Apache Kafka & Avro, Active MQ, Elasticsearch, React Native, Spock Test, IntelliJ IDEA, Kubernetes, Helm, Microservices/Netflix-Stack, TeamCity, Splunk.
- Kanban team, continuous integration.
- Migrated existing applications from Deutsche Bank's private cloud environment to Azure as part of a carve-out.
Michael W.
Last position:
TUI AG / Robinson
- Development of an Internet Booking Engine IBE (Saber and Juniper) and other microservices
- Backend development with PHP and Symfony, endpoint and interface implementation
- Unit and integration testing
Discover over 15,000 top freelancers
Statistics of experts using Apache Solr
Aggregated from the professional profiles of matched freelancers.
Experience
25 years (Germany: 21 years)
Position duration
2.4 years (Germany: 1.9 years)
Positions per freelancer
16
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Media and Entertainment, Automotive
Certification focus areas
Information Technology, Product Development
Bachelor's degree or higher
100% (Germany: 94%)
Master's degree or higher
40% (Germany: 55%)
Doctorate
20% (Germany: 9%)
Certifications per freelancer
1 (Germany: 2)
Most common languages
German, English, Spanish
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 Berlin 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 Berlin using Apache Solr
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.
Apache Solr 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%)
- Media and Entertainment (86%)
- Automotive (57%)
- Retail (57%)
- Telecommunication (57%)
- Education (43%)
- Insurance (43%)
- Professional Services (43%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Search and discovery
Apache Solr is an open-source search server built on Apache Lucene. It turns structured and unstructured data into searchable indexes and supports full-text search, faceting, filtering, highlighting, suggestions and relevance ranking. Companies use it to make large catalogues, knowledge bases and content collections easier to explore.
Core capabilities
Solr handles demanding search workloads through configurable schemas, analyzers, tokenizers and query parsers. Specialists work with field types, boosts, synonyms, stemming and language-specific analysis to improve recall and precision. They also shape APIs and result formats so search works consistently across web, mobile and internal applications.
Ecosystem and tooling
The wider Apache Solr ecosystem includes Apache Lucene, SolrCloud, ZooKeeper, SolrJ and request handlers for common search patterns. Experts may connect Solr to relational databases, data pipelines, message queues and content management systems. They also use monitoring, backup and deployment tooling to keep indexes healthy in containerized or cloud environments.
Typical project work
- Model schemas for product, document and media search
- Migrate collections from legacy search systems or hosted services
- Configure SolrCloud collections, shards, replicas and leaders
- Tune queries, indexing pipelines, caching and relevance rules
- Build autocomplete, faceted navigation and multilingual search
When to bring in expertise
Companies often need freelance Solr expertise when search results are slow, inconsistent or difficult to explain. A specialist can assess the index design, query patterns, data flow and operational setup before proposing focused changes. Berlin teams may work with experts on-site for discovery sessions or remotely for implementation, testing and handover.
What strong specialists deliver
Strong Apache Solr professionals understand both information retrieval and production operations. They can translate user intent into measurable relevance goals, explain trade-offs clearly and test changes against representative data. Look for experience with Lucene internals, distributed recovery, observability, security, data quality and integration boundaries—not just basic query configuration.
Frequently asked questions
Key details about Apache Solr, drawn from the questions we get asked most.
Apache Solr is used to build fast search and discovery features for product catalogues, websites, document repositories, media libraries and internal knowledge systems. It supports full-text search, filters, facets, suggestions, highlighting and configurable relevance ranking.
Apache Solr and Elasticsearch both use Apache Lucene and support distributed search, but they differ in APIs, administration models and ecosystem conventions. The right choice depends on query requirements, existing infrastructure, operational preferences and the team’s familiarity with each system.
A strong Apache Solr specialist usually understands Apache Lucene, data modeling, indexing pipelines and relevance evaluation. Useful adjacent skills include Java, SolrJ, REST APIs, SQL, messaging systems, Docker, Kubernetes, cloud operations and observability.
A small search feature may need focused configuration and integration knowledge, while a distributed or multilingual platform calls for deeper production experience. For complex Apache Solr work, look for someone who has handled schema evolution, relevance tuning, migrations, failure recovery and performance diagnosis.
Apache Solr projects are well suited to remote collaboration because configuration, queries, tests and infrastructure changes can be reviewed asynchronously. For Berlin-based teams, on-site workshops can help with search requirements and stakeholder alignment, while implementation and support can remain remote.
Ask for concrete examples of search systems they designed, including the data model, relevance approach and operational constraints. A capable Solr professional can explain trade-offs, show how they test ranking changes and describe how they monitor indexing and query behavior.
SolrCloud is appropriate when search data and traffic require distributed storage, replication or controlled scaling across nodes. It adds operational complexity, so a specialist should first confirm that the availability and capacity needs justify shard management, recovery procedures and cluster monitoring.
An Apache Solr expert starts by examining queries, fields, analyzers, synonyms, boosts and representative user searches. They then measure relevance changes, address data quality issues and tune caching or indexing only after confirming that the ranking logic matches the intended search experience.
The average hourly rate of freelancers in Berlin, Germany who have used Apache Solr 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 Berlin, Germany who have used Apache Solr in their recent projects, 100% hold at least a Bachelor's degree, 40% hold at least a Master's degree, and 20% hold a doctorate.
On average, freelancers in Berlin, Germany who have used Apache Solr in their recent projects have 25 years of professional experience, with a single engagement typically lasting around 2.4 years.
The most common languages among freelancers in Berlin, Germany who have used Apache Solr in their recent projects are German (100%), English (100%), and Spanish (14%).
The most common industries among freelancers in Berlin, Germany who have used Apache Solr in their recent projects are Information Technology (100%), Media and Entertainment (86%), and Automotive (57%).
The most common business areas among freelancers in Berlin, Germany who have used Apache Solr in their recent projects are Information Technology (100%), Product Development (100%), and Business Intelligence (43%).
Main locations of FRATCH Experts, who have recently used Apache Solr
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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