Unix Experts in Berlin
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Meet FRATCH Experts in Berlin, who have recently used Unix
Alexander Zhirov
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.
Hendrik Wagner
Last position:
Software Test and Maintenance Support at Anton Paar ProveTec GmbH
- Add/create test specifications
- Conduct regression tests
- Conduct release tests
- Analyze Jira tickets
- Identify software defects and fix them with C#
Lasya Marella
Last position:
Data Engineer at Carelon Global Solutions (Elevance Health)
- Designed and implemented scalable ETL/ELT pipelines using Python, SQL, dbt, AWS and Informatica to ingest data from sources such as APIs, relational databases, and flat files into Snowflake, reducing pipeline runtime by ~30%.
- Migrated high-volume datasets from on-premises Teradata to Snowflake using AWS services (S3, Glue, Step Functions, IAM), ensuring data consistency and integrity.
- Applied Kimball methodology to design star and snowflake schemas, improving query performance and reducing Snowflake compute costs.
- Implemented automated data quality checks using SQL-based dbt tests and the Great Expectations framework to detect anomalies and enforce data correctness before production loads.
- Orchestrated ETL workflows in Airflow using Python and managed code deployments via Git with CI/CD best practices to increase deployment reliability and maintain pipeline uptime.
- Built interactive Power BI dashboards and curated datasets to enable data-driven decision-making for stakeholders.
- Maintained technical documentation in Confluence for ETL workflows, and led knowledge-sharing sessions for new joiners.
Heiko Krain
Last position:
SAP development, Adobe form development at Arvato SE
- conversion of a function-group-based Adobe Interactive Forms framework to an object-oriented Adobe framework for documents in transport/logistics and dunning (FI)
- Adobe Lifecycle Designer 11.0.1 for SAP
- creating new and troubleshooting existing forms, function modules, programs, classes, and methods
- maintaining Smart Forms
- document printing, email sending, and file archiving
- message control for deliveries, orders, invoices, proforma invoices, and transports
- ticket system: Jira
- communication: Microsoft Teams
- migrating customers to a new SAP framework
- handling incident and change request tickets
- software: SAP ERP 6.0, SAP_ABA 7.5G, S4CORE 1.05
André Görst
Last position:
IT Consulting Project Management / Engineering Subproject Management at T-Systems (on assignment for government agencies)
- Projects for federal networks (NdB).
- CR management, EoL change requests, design and documentation according to ITSCM.
- Data center planning.
- Project management and engineering subproject management.
- Software development for virtual server environments according to BSI.
Beserithan Malabakan
Last position:
SD Development and CRM Interaction Center Development at Sanner GmbH
- Part-time 2-3 days/week
- Developments in the SD module and CRM Interaction Center
- Consulting, customizing in SD module
- Adapting Fiori applications in the SD module
- Approval workflow for credit memos: design, concept, implementation, customizing
- Credit memo request: object type BUS 2094
- If the credit memo request value is below a certain threshold -> automatic release and removal of billing block
- If the credit memo request value is above a certain threshold -> automatic determination of the responsible employee
- The employee receives a work item in their integrated inbox or in My Inbox (Fiori) -> the employee can reject, approve, or edit the credit memo request
- UML modeling in technical documentation
- Creating a Z-table for customer sample line items
- Merging COA1 (delivery) + COA2 (CAQ) forms and adding to the spool request as a single PDF
- Correcting workflow title according to NACE, fixing message "ZBMA title is displayed incorrectly in SBWP (Workplace)"
- Receiving PLM documents from an external PLM system, creating an RFC function module, storing PLM documents in the material master as GOS objects
- On releasing a production order, reading PLM documents from MM and saving them in a shared folder for the MES system
- Displaying the number of inspection methods in a popup when creating an order -> VA01/VA02
- Automatic stock reconciliation LVS IDOC INVCON
- Performing AQUA tests
- IDOC archiving for old IDOCs
- NL_PM_drawings and storing print output, informing MES via ZPPORDER IDOC, writing technical documents
- Using SD user exits, BADIs for various requirements
- Extending screens for customer requests via screen exits
- Creating message types for sales orders, purchase orders, and invoices
- Extending CRM Interaction Center Business Partner -> Overview -> Contract with customer-specific requirements
- New Fiori application departure control with data from Z-table and standard equipment tables, displaying a pie chart, calculating "vehicles in operation"
- Extending Interaction Center Business Partner -> Overview -> new tab on Overview Page with list tables for performance feedback, attachments from GOS objects
- Extending Interaction Center Business Partner -> Overview -> new tab on Overview Page with list tables for PM quality notifications, attachments from GOS objects
- Implementing BADIs in CRM
- File storage on SAP server/UNIX server
- Using BOL/GENIL architecture in CRM development
- Project language: German
Peter Kortmann
Last position:
Hardware and Software Developer / Project Manager at Anonymer Kunde
- Development of control units for the automotive industry incl. embedded software
- CAN bus, Vector Tools, CANoe
- Support of the development process according to ISO 26262
- Ensuring cyber security standards:
- Key exchange (PKI) between vehicle and control units
- Hardware Security Module (HSM)
- Communication with external service providers (international)
- Development (PCB) of measuring adapters, statistical analysis of sensors
- IoT and embedded software development, backend administration
Shreyashi Sengupta
Last position:
Warehouse Assistant at Adecco GmbH
- Sorting of customer orders
- Packaging and warehouse assistance
- Working late nights and weekends (130 hours/month)
Deependra Pokhrel
Last position:
Data Specialist at Cloud Factory
- As a Data Specialist, I leveraged analytical expertise to transform raw data into actionable insights, driving strategic decision-making and operational improvements. My role encompassed data interpretation, reporting automation, and cross-functional collaboration, utilizing advanced tools such as Microsoft Excel, Power BI, and Python for comprehensive data analysis.
- Implemented Python scripts to validate and reconcile large datasets, reducing manual errors and improving data reliability.
- Utilized Python (Pandas, NumPy, Matplotlib/Seaborn) to automate data cleaning, analysis, and visualization, improving efficiency and accuracy in reporting.
- Developed interactive dashboards in Power BI to present key metrics, trends, and performance indicators, facilitating real-time decision-making.
- Designed and executed automated reports using Excel (Pivot Tables, Power Query, VBA) and Power BI, ensuring data accuracy and consistency across departments.
- Data Analysis: Excel (Advanced Pivot Tables, Power Query), Power BI (DAX, Data Modeling), Python (Pandas, NumPy, Visualization Libraries)
- Automation & Reporting: Power BI Dashboards, Excel Macros (VBA), Python Scripting.
Nikunjkumar Parmar
Last position:
Senior Java Backend Developer at Questax Professionals GmbH
- Provide the Price Listing Service Team Price for all cars and vans in different markets
- Adjust market-specific requirements like taxes, government subsidies, campaigns
- Import, synchronize and store new prices for all new and existing cars in Redis datastore
- Support our product and handle on-call duties
- Daily operations, developing new features, bug fixing
- Pair programming, code reviews, mob programming
- Develop POCs for new ideas
- Maintain and extend the backend
- DevOps tasks
- Perform Kubernetes updates
- Adjust and further develop Kubernetes resources
- Develop and customize Helm charts
- Adjust and update ArgoCD
- Maintain, adjust and further develop CI/CD pipelines
Thomas Merkel
Last position:
Lead Cloud Infrastructure Engineer at TrackCode GmbH
- Developing GitHub Actions/pipelines for automatic application deployment
- Supporting the provisioning of Helm charts for the CI/CD infrastructure
- Rebuilding and migrating a Kubernetes cluster using Rancher
- Creating IaC with Terraform for Kubernetes and additional services (monitoring, databases)
- Deploying a highly available Percona Galera cluster (MySQL)
- Implementing a centralized monitoring and logging infrastructure
Klaus Breyer
Last position:
Founder at unixtime.app
- Designed a tool for API developers to facilitate bulk timestamp conversion, born from IIoT microservice work with abundant Unix timestamps.
- Streamlined workflows by allowing copy-pasting of entire API requests to view and convert all timestamps in context.
- Enabled screenshot captures of conversions for sharing in collaborative spaces like Slack or JIRA.
- Evolved from a straightforward HTML file into a full-fledged Mac and Windows application.
- Open sourced the project to give back to the developer community.
Max Echt
Last position:
Tester, Test Manager at Techniker Krankenkasse (TK)
- Quality assurance of the "Telematics Infrastructure Messenger (TI-M)" application
- Introduction of test management for the TI-M product
- Reviewing test requirements (gematik specification)
- Creating test documentation
- Defining different test levels
- Designing test scenarios in coordination with subject matter experts
- Test data management
- Responsible for test case specification from user stories
- Responsible for performing manual tests on various platforms (iOS & Android)
- Conducting release and integration tests
- Bug analysis and documentation
- Retesting bugs
- Skills: test management documentation, requirements analysis, frontend testing, mobile testing, Jira (TestFLO), Confluence, agile processes, Telematics Infrastructure Messenger, accessibility
Mostafa Solaiman
Last position:
Embedded Firmware Engineer at Esko-Graphics Imaging GmbH
- FPGA code conversion from AHDL to Verilog and SystemVerilog (Altera Cyclone)
- IDE: Intel Quartus Prime (Altera)
- Code simulation: QuestaSim
- Timing analysis
Jürgen Bargmann
Last position:
Database Administrator and Performance Tuning Specialist at ALD Automotive Leasing Deutschland
- Database administration and performance tuning for Oracle databases on AIX 7.1, 7.2 with Oracle 12c and 19c
- Troubleshooting and resolution on RHEL 7
- Automation of operations with UNIX/Linux shell scripts, Perl programs, and PL/SQL
- Planning, preparation, execution, and customer-specific review of changes and upgrades for the LEASMAN and DOXIS applications
- Incident handling including communication with outsourcing service providers and business units
- Data exchange with Data Pump
- Visualization of database content and monitoring results
- Configuration of databases for Debezium and monitoring Debezium activities
- Preparation of Oracle databases for migration to cloud environments
- Implementation and monitoring of NIST requirements in databases
- Automation of release upgrades for the LEASMAN application
- Creation of operations manuals and instructions
- Generation of reports for GDPR information requests
Discover over 15,000 top freelancers
Statistics of experts using Unix
Aggregated from the professional profiles of matched freelancers.
Experience
21 years (Germany: 26 years)
Position duration
2 years (Germany: 3.2 years)
Positions per freelancer
18
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Professional Services, Automotive
Certification focus areas
Information Technology, Business Intelligence, Product Development
Bachelor's degree or higher
83% (Germany: 82%)
Master's degree or higher
52% (Germany: 49%)
Doctorate
13% (Germany: 11%)
Certifications per freelancer
1 (Germany: 3)
Most common languages
English, German, French
Speak two or more languages
100% (Germany: 98%)
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 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 Unix
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
Unix in practice
Unix is a family of operating systems built for stable multi-user work, strong process control, and clear command-line operations. Companies use Unix for servers, internal tools, network services, and legacy systems that still need careful operation. It often sits behind critical workloads that value predictability over noise.
Where it fits
- Server administration and day-to-day operations
- Shell scripting and job automation
- User, group, and permission management
- Network service setup and troubleshooting
- System hardening and patch handling
In Berlin, Unix still matters in enterprise IT, media, telecom, research, and mixed infrastructure teams that run older but reliable platforms alongside newer systems.
Tools around it
Strong specialists work comfortably with the shell, awk, sed, cron, init systems, package tools, logs, and remote access workflows. They also understand related systems such as AIX, HP-UX, Solaris, and BSD, plus POSIX rules that keep scripts and services portable across Unix-like environments.
When to bring in help
Bring in freelance expertise when a Unix host needs urgent troubleshooting, cleaner automation, a migration plan, or documentation that survives handovers. It also helps when an internal team knows the business systems but lacks time for deeper command-line work, permissions reviews, or service recovery.
What strong specialists do
Strong professionals read the system first, then change it carefully. They trace process issues, inspect logs, keep scripts idempotent, and avoid breaking older services that depend on exact behavior.
They also write clear notes, separate temporary fixes from durable ones, and leave behind commands and checks your team can reuse.
Hiring signals
- Old scripts fail after small changes
- Services restart slowly or unpredictably
- Access rules are unclear or inconsistent
- Remote support is needed across teams
- Migration work must protect legacy Unix behavior
For Berlin-based teams, that mix often means balancing on-site coordination with remote delivery, especially when system access is strict or documentation is thin.
Frequently asked questions
The facts hiring teams ask for most often when it comes to Unix.
Unix is used for servers, service hosts, automation, and long-lived business systems that need predictable behavior. It is also common in environments that rely on shell scripts, remote administration, and strict permission control.
Unix and Linux often solve similar problems, but Unix usually refers to the original family and vendor systems such as AIX, HP-UX, and Solaris. BSD is Unix-like and shares many concepts, so a specialist should understand shell tools, process handling, and POSIX behavior across all three.
A strong Unix specialist usually knows shell scripting, networking basics, log analysis, service management, and permissions. Depending on the stack, knowledge of AIX, Solaris, HP-UX, or BSD can matter as well.
A small access or scripting task may need only focused support, while migrations, hardening, or recovery work need deeper operational experience. Unix work becomes harder when the system is old, lightly documented, or tied to business-critical services.
Yes, most Unix tasks can be handled remotely if the specialist has secure access, clear change windows, and good logging. For Berlin teams, on-site time is mainly useful for sensitive handovers, hardware-related checks, or work that needs close coordination with internal operations.
A strong Unix freelancer changes as little as possible while still solving the issue. They document the exact commands used, explain risks clearly, and leave systems easier to operate after the task is done.
No, Unix is strongly associated with older systems, but its ideas still shape modern operations work. Many teams still depend on Unix servers, Unix-like behavior, and scripts that must remain portable over time.
Ask which Unix variants they have worked on, how they handle backup and rollback, and how they document changes. Also ask how they diagnose permission, service, and network issues so you can judge whether their method fits your environment.
The average hourly rate of freelancers in Berlin, Germany who have used Unix in their recent projects is 90 €, which corresponds to a daily rate of about 722 € based on an 8-hour working day.
Of the freelancers in Berlin, Germany who have used Unix in their recent projects, 83% hold at least a Bachelor's degree, 52% hold at least a Master's degree, and 13% hold a doctorate.
On average, freelancers in Berlin, Germany who have used Unix in their recent projects have 21 years of professional experience, with a single engagement typically lasting around 2 years.
The most common languages among freelancers in Berlin, Germany who have used Unix in their recent projects are English (100%), German (96%), and French (27%).
The most common industries among freelancers in Berlin, Germany who have used Unix in their recent projects are Information Technology (96%), Professional Services (46%), and Automotive (42%).
The most common business areas among freelancers in Berlin, Germany who have used Unix in their recent projects are Information Technology (96%), Product Development (81%), and Business Intelligence (62%).
Main locations of FRATCH Experts, who have recently used Unix
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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