Apache Solr Expert in Berlin
for search experiences, matched in minutes with vetted and available freelancersHire experts who design search platforms with Apache Solr, Apache Lucene, and SolrCloud, from relevance tuning to production operations. 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
- Developed an Internet Booking Engine (IBE) (Saber and Juniper) and other microservices
- Backend development with PHP and Symfony, endpoint and interface implementation
- Unit and integration tests
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
2.2 years (Germany: 1.9 years)
Positions per freelancer
16 (Germany: 15)
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 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Berlin 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 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 19 Sep 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 Foundations
Apache Solr is an open-source search and analytics server built on Apache Lucene. It indexes structured and unstructured content, exposes search through HTTP APIs, and supports full-text queries, faceting, filtering, highlighting, suggestions, and geospatial search. Companies use it to power product discovery, document search, site search, and content portals.
Search Applications
Solr fits systems that need fast retrieval across large, changing collections and precise control over relevance. It can support customer-facing search, internal knowledge discovery, catalog navigation, media libraries, and location-aware results.
- Product and catalog search
- Enterprise document and knowledge search
- Faceted navigation and filtering
- Autocomplete, spell correction, and synonyms
- Geospatial and content discovery features
Ecosystem and Tooling
Strong Solr specialists work with Apache Lucene concepts such as analyzers, tokenization, stemming, fields, scoring, and query parsers. They also understand SolrCloud, ZooKeeper, schema design, SolrJ, the Solr Admin UI, HTTP APIs, and integrations with data pipelines, relational databases, message brokers, and observability tools. Docker and Kubernetes are common in managed or self-hosted deployments.
Project Delivery
Companies bring in freelance Solr expertise when search quality is inconsistent, indexing jobs fall behind, or an existing installation needs a safer operating model. A specialist can define the schema, design indexing and update flows, migrate from another search system, tune queries, configure replicas and shards, and document the service for internal teams. In Berlin, remote collaboration often works well, while workshops or operational handovers may benefit from on-site availability and clear German or English communication.
Reliable Operations
Production search needs more than working queries. Professionals should plan collection design, update frequency, replication, backups, failover, security, capacity, and controlled deployments. They use query analysis, logs, metrics, and representative datasets to find slow requests and relevance problems without relying on guesswork.
Choosing Specialists
Look for evidence of search systems similar to yours and ask how the specialist measured relevance, handled schema changes, and tested failure scenarios. A strong professional can explain trade-offs between Solr and alternatives such as Elasticsearch or OpenSearch, connect search decisions to user behavior, and leave behind maintainable configuration and clear runbooks.
- Practical Lucene and relevance knowledge
- Experience with distributed SolrCloud operation
- Clear testing and migration plans
- Secure, documented production practices
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 over structured or unstructured content. Common applications include product catalogs, enterprise documents, websites, media collections, faceted navigation, autocomplete, and geospatial search.
Apache Solr and Elasticsearch or OpenSearch all use Apache Lucene and support distributed search, analytics, and JSON or HTTP-based access. The best choice depends on query needs, schema and configuration preferences, operational tooling, existing integrations, and the team’s experience rather than on a universal performance claim.
A strong Solr specialist usually understands Apache Lucene, information retrieval, schema design, analyzers, query parsing, and relevance testing. Experience with Java, SolrJ, REST APIs, databases, data pipelines, Docker, Kubernetes, and observability is also valuable.
The right level of Apache Solr experience depends on the scope and risk of the work. A focused schema or query task may need targeted expertise, while a migration, SolrCloud rollout, or production reliability project calls for a professional who has handled distributed systems and failure scenarios.
Apache Solr work is often well suited to remote collaboration because configuration, code, logs, and search tests can be reviewed online. Berlin teams should agree on communication language, working hours, access controls, and whether discovery workshops or operational handovers require on-site sessions.
Companies often hire an Apache Solr freelancer when search relevance is poor, indexing is unreliable, response times are difficult to explain, or an installation needs migration and operational improvements. External expertise can also help before a major launch when internal teams need an independent design or readiness review.
Ask how the Solr professional defines relevance, creates representative test queries, measures changes, and investigates slow requests. Good work includes clear schema and query decisions, repeatable tests, secure configuration, monitoring, rollback plans, and documentation that another team can operate.
A typical Apache Solr engagement may deliver collections and schema configuration, indexing pipelines, query integration, relevance rules, synonyms, operational runbooks, and monitoring guidance. For a migration or cluster project, it may also include data validation, rollout steps, failure testing, and knowledge transfer.
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 2.2 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.
Hamburg 
Munich Request a free demo
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