
Mainframe Experts in Frankfurt
for secure core systems, matched in minutes with AIHire experts who modernize COBOL applications, manage z/OS environments and connect IBM Z systems with cloud services. FRATCH matches you quickly and precisely with vetted, available freelancers for critical Mainframe work.
Meet FRATCH Experts in Frankfurt, who have recently used Mainframe
Christian H.
Last position:
NTT Data Center Replacement – €20m at ING
NTT Data Center Replacement – €20m
- Strategy & Requirements: Data Center migration and exit strategy for ING Germany, including definition of project scope, objectives, KPIs and comprehensive requirements across cybersecurity, physical security, regulatory and group-wide strategic standards.
- Regulatory & Risk Governance: Regulatory and supervisory requirements, risk assessments, ECB notification and audit-ready documentation, achieving formal sign-off with no material findings.
- Procurement & Vendor Selection: RFP and selection of Data Center providers, migration specialists and secure transportation partners in cooperation with Procurement and in line with ING Group requirements.
- Commercial & Contractual: Complex contract negotiations with selected providers, coordinating Legal, Procurement, Business, Security, Compliance (incl. DORA) and Senior Management across both organisations.
- Infrastructure & Data Center Delivery: Data Center fit-out and implementation of base technology, including internal networks, external connectivity, cabling and core services, aligned with required security standards.
- Migration & Transition: End-to-end planning and preparation of application and infrastructure migrations, including environment-specific runbooks and coordination with Release Management, followed by handover to the internal ING organisation for execution; migration execution achieved zero unplanned downtime and no customer impact.
- Financial & Program Control: €20m Program budget with governance of expenditure, forecasts, milestones, dependencies and critical paths, maintaining delivery within approved budget and timeline parameters.
Jörn B.
Last position:
Project Management and PMO at TANKKARTEN | PAYMENT
- Close collaboration with development teams to ensure alignment with project objectives
- Assessment of in-scope assets, creation of requirements, and support of the public tender process through the selection of a provider
- Creation and maintenance of UML sequence diagrams to document system interactions
- Extensive use of Agile/Scrum methodology and Spotify model
- Development and implementation of cutover and dress rehearsal plans together with the application managers
Günther E.
Last position:
Senior Consultant at ISMS Rollout – Information Security Certification (ISO 27001)
- Built and successfully certified the Information Security Management System (ISMS) according to ISO 27001 in seven country organizations (Ghana, India, Bangladesh, Uzbekistan, Serbia, Kosovo, Albania).
- Full implementation of the ISMS from kick-off phase to certification, including defining the governance structure and process landscape.
- Developed and delivered target-group-specific trainings, workshops, and coaching sessions for local responsible persons on the basics of information security and ISMS operations.
- Designed and continuously improved training concepts and content to increase understanding and acceptance.
- Identified and implemented improvements in processes and tools, including risk management for international projects.
- Optimized central ISMS core processes from the idea through pilot operation and fine-tuning to global rollout.
- Optimized knowledge management, as well as work aids and methods for the global ISMS team.
- Built and moderated cross-functional coordination with key interfaces to the ISMS.
- Microsoft Teams, Excel, SharePoint Lists, Power Apps.
Jan P.
Last position:
Operational Readiness / Migration Lead at Worldline
Migration of SEPA direct debits, credit transfers & card clearing to Worldline's internal platform as part of the outsourcing contract
Definition of the MIGR strategy
Mobilization of the community (300+ experts at client & Worldline)
Creation of the MIGR runbook (100+ workshops)
Close collaboration with upstream project streams: BUILD & TEST, as well as with the operating units
Set up of the governance framework, capacity management & reporting
100% of SEPA DD, CT & CC transaction traffic migrated (7 months)
~80 migrations carried out with a success rate of 70% ("first-time right")
Set up technical & manual production monitoring
Established a "fast-track" incident management process in the MIGR & hypercare phases
Set up 20+ exception handling processes
Conducted trainings
Implemented SLAs & billing
Khalid S.
Last position:
IT Infrastructure Coordinator at SAFEE Technology
- GfK Data center IT Infrastructure project onsite coordinator (Equinix DC FR2/FR7) training FEs in Equinix DC Carla, FNT, Jira Confluence, ServiceNow (Change/Problem/Incident MGMT), DCIM, ITSM, ITIL
- Reporting significant incidents as the on-site technical coordinator and initial point of contact for vendor escort and smart hands
- Utilizing CMDB-GUI, NIQ-Browser, CMDB-Filtering-GUI, OSS-Radar, BigBrother, CheckMK, and TTWOS for 2nd and 3rd level troubleshooting support
- Maintaining MDF, IDF, computer rooms, and closets; coordinating with service desk, reception, and security for visitor access
- Managing asset lifecycle including operation, retirement, stocking, and destruction with proper SanDisk procedures
- Leading footprint data centre optimization and reduction in FR2/FR7; handling network, server, storage, desktop, hosting, IT security, video conferencing, and telephone operations
- Coordinating server relocations, fibre optics/copper cable preparations, CMDB updates, and stakeholder cooperation
- Implementing IT infrastructure design, maintenance, configuration, and construction following Dell/HP/Apple ESD safety precautions
- Single POC for change management network, Star Track, backup & storage, cloud, Linux, Windows, EUS teams & Software Centre installs
- Successfully completed DC Footprint Reduction Project 2021/2022 and GfK New Hardware DC Refresh Initiative
- Planning, configuring, and installing Dematic server rooms and switch configurations in Heusenstamm, Wurzburg, Kahl am Main, and Graz Austria
- Providing on-site media equipment setup for HP, hospitals, manufacturers, and laboratories
- Ensuring professional rack and cable management following best practices
- Maintaining up-to-date plant maps accessible to all teams showing technology space and spare locations
- Offering technical assistance for live events, town halls, forums, streaming, and hybrid events on and off campus
- Providing second level support for Poly video conferencing systems across multiple time zones
- Conducting frequent computer room walkthroughs, recording power, cooling, alarm, security threats, and mapping wireless environment and access points
Suneel D.
Last position:
SAP Consultant & Developer at KS KeySolutions GmbH
- ABAP developments for rku.it GmbH, Agena GmbH, Koenig & Bauer AG, Salzgitter AG, duagon AG
- Redesigned material configuration data mass maintenance Fiori app for Siemens AG Engineering to resolve system resource issues
- Conducted S4Hana ABAP code remediation, ATC checks, and implemented ABAP parallel processing for Voestalpine AG
Leonid R.
Last position:
IT Business Analyst / Requirements Engineer at S-Payment GmbH / Sparkasse (DSV-Gruppe)
- Business analysis of payments for the introduction of Wero EPI in Germany.
- Analysis and optimization of merchant processes in the context of acquiring and issuing.
- Analysis of interfaces for instant payments.
- Analysis of SCT-Inst processes, settlement mechanisms and reporting processes.
- Identification and clarification of gaps in merchant processes.
- Analysis and documentation of clearing and settlement processes.
- OSPlus process analysis and documentation.
- Coordination and alignment with scheme management as well as various payment service providers and financial institutions on merchant processes.
- Preparation and follow-up as well as active participation in EPI meetings on technical coordination and regulatory topics in payments, including content familiarization and prioritization.
- Preparation and documentation of project and steering committees in the EPI environment.
- Creation of status reports for the subproject.
- Maintenance and structuring of Confluence pages for project documentation.
- Coordination and alignment with the issuing teams on individual customer processes as well as aligning with bank processes and acquirer processes in the Wero environment.
- Communication with payment service providers regarding merchant and bank processes in the Wero environment.
- Organizational support for project management in special tasks in the EPI and Wero environment.
- Digital filing and documentation in Confluence and Microsoft Teams.
- Planning, implementation and tracking of work packages and steps.
- Quality assurance and project control.
- Consulting on IT strategy, IT architecture and interface management in the EPI and Wero environment.
- Technical environment: Jira, Confluence, XML, JSON, MS Office (Word, Excel, Teams, PowerPoint), SharePoint, Draw.io, Innovator, 3rd-level support, ITIL, creation and updating of software documentation, interface management, OSPlus, Scrum, KYC, payment, European Payments Initiative (EPI), Wero, Microsoft Loop, Instant Payments, SCT-Inst.
Rouven-Benjamin T.
Last position:
Operations Leader at VKB
- Operational management as well as functional and disciplinary leadership of around 34 employees (internal/external, national/international) with a budget responsibility of €2.5M
- Project management for the digital transmission of health insurance contributions
- Management of digitization projects (mainframe, CRM, databases, sales systems) with end-to-end responsibility
- Ensuring operational compliance, especially data protection and regulatory requirements
- Coordination of central interfaces between IT, procurement, finance, authorities, and customers
- Setting up and optimizing efficient organizational and governance structures
- Leading an agile team across nine operational areas
Andreas S.
Last position:
Project Management, Development and Test- (Defect-) Management at safarica.com
- Creation and implementation of a multilingual, relational MariaDB database to reflect the requirements of a booking system designed for safaris in Africa
- Testing the front- and backend functionality, registration of clients and suppliers, the editorial system and the payment workflow
- Defect management and documentation via BugHerd
- Implementation of an automatic internal deployment of deliveries provided by an external company via bash scripts
- Coordination of external companies in the function of a project manager (Stakeholder Management)
Markus G.
Last position:
Master Candidate at Universidad de Málaga
- Final preparation for the defense to graduate with a Master's in Computer Science for the PhD
Panagiotis T.
Last position:
IT Manager at XCMG – XFL
- Gather basic requirements
- Plan the project
- Create RfP and tender
- Interview five vendors
- Review proposals and contracts
- Create a vendor shortlist based on hard facts (criteria catalog, price, licenses) and soft facts (quality of documents, software user experience, reputation and references)
- Support the initiation and RfP & vendor selection phases
- Plan the implementation & go-live and hypercare phases for 2025
Stefan F.
Last position:
Project Management – Telecommunications at 1&1 Versatel
- Set of concurrent projects (BSS/OSS related)
Torsten B.
Last position:
Program Manager Refactoring at Astadia (an Amdocs company)
- Lead all program and project management activities for assigned customers around Mainframe modernization offerings
- Project management of Astadia services for Mainframe to Cloud project with German Railway (DB Cargo) and for legal services in Italy
- Project manage execution of proof of concepts and assessments in Legal, Banking, Telecommunications and Automotive for customers globally
- Represent Astadia in delivery, planning, and review contexts
- Guide self-organizing agile development teams to improve structure and dependency management
- Evaluate risks and impediments to success and assist with roadmap and increment planning
- Establish and supervise metrics for key program work and present to leadership, portfolio management and partners
- Tools: Teams, M365, Office365, MS Office, MS Project, Jira, SharePoint, Confluence, Azure DevOps
Discover over 15,000 top freelancers
Statistics of experts using Mainframe
Aggregated from the professional profiles of matched freelancers.
Experience
23 years (Germany: 30 years)

Position duration
1.8 years (Germany: 2.3 years)

Positions per freelancer
14 (Germany: 18)

Top business areas
Information Technology, Project Management, Operations

Top industries
Banking and Finance, Information Technology, Professional Services

Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
73%
Master's degree or higher
27% (Germany: 48%)
Doctorate
9% (Germany: 12%)

Certifications per freelancer
2 (Germany: 3)

Most common languages
German, English, Spanish

Speak two or more languages
100% (Germany: 96%)
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 Frankfurt 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 Frankfurt using Mainframe
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.
Mainframe experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Banking and Finance (85%)
- Information Technology (85%)
- Professional Services (54%)
- Manufacturing (46%)
- Automotive (38%)
- Energy (31%)
- Insurance (31%)
- Government and Administration (31%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Core systems
Mainframe technology supports high-volume, dependable processing for banking, insurance, transport, public administration and large enterprises. IBM Z systems commonly run z/OS and handle transaction processing, batch workloads, identity data and records that must remain available and consistent.
Languages and runtime
COBOL remains central to many Mainframe applications, alongside PL/I, Assembler, JCL, SQL and REXX. Strong specialists understand CICS transaction processing, IMS databases, DB2 for z/OS, VSAM files and the operational controls that connect application code with the wider system.
Delivery work
Mainframe specialists contribute across legacy estates, modernization programs and daily production operations. Typical deliverables include:
- COBOL application changes and batch job design
- JCL, CICS, DB2 and data migration work
- z/OS integration with APIs, Java and cloud services
- Release automation, monitoring and production support
Modernization decisions
Companies bring in freelance expertise when internal knowledge is limited, a critical platform needs a safe change, or a modernization roadmap must be tested against operational reality. Specialists can assess dependencies, document undocumented flows and separate valuable business logic from outdated interfaces without disrupting core processing.
Frankfurt collaboration
In Frankfurt, Mainframe expertise is relevant to financial services, insurance, logistics and public-sector environments that depend on resilient transaction systems. Projects may require on-site workshops for access, audits or knowledge transfer, while analysis, coding and documentation can often be handled remotely with secure procedures and clear handovers.
Strong specialists
Reliable professionals combine deep platform knowledge with disciplined change control. They can trace a transaction from business requirement through COBOL, JCL, CICS and DB2, explain risk in plain language and test both normal and failure paths. Look for evidence of production responsibility, careful documentation, security awareness and practical experience connecting IBM Z with modern delivery teams.
Frequently asked questions
Key details about Mainframe, drawn from the questions we get asked most.
Mainframe technology is used for high-volume, reliable processing of transactions and records. Banks, insurers, retailers, transport operators and public institutions use it for account processing, billing, reservations, claims and other workloads where consistency and availability are essential.
Mainframe systems and cloud platforms serve different strengths. Mainframes excel at dependable centralized transaction processing and mature data controls, while cloud environments offer flexible infrastructure and rapid service deployment; many companies combine both through APIs, event flows and managed integration.
A strong Mainframe specialist may work with COBOL, JCL, z/OS, CICS, DB2, IMS, VSAM and REXX. Useful adjacent skills include API integration, Java, DevOps automation, security, data migration, testing and clear documentation of complex dependencies.
The right level depends on the risk and scope of the work. A contained batch change may need focused COBOL and JCL expertise, while a production migration or modernization program calls for someone who can assess architecture, dependencies, testing and operational impact across the estate.
Mainframe work can often be performed remotely when secure access, environments and communication routines are in place. Frankfurt-based projects may still benefit from on-site sessions for regulated access, stakeholder workshops, production handover or knowledge transfer, with language expectations agreed at the start.
Ask for examples of comparable production systems, the exact technologies used and the specialist’s role in releases or incidents. Confirm that they can explain business impact, document changes, work within access controls and collaborate with teams responsible for connected applications.
IBM Z is the current IBM system family, while z/OS is its principal enterprise operating system. Mainframe is the broader term for the platform and its operating environments; older references such as System z may appear in documentation, contracts or professional histories.
A capable Mainframe freelancer can describe how they isolate dependencies, test batch and online paths, manage JCL and validate DB2 or CICS changes. They should also show disciplined release practice, incident awareness and the ability to preserve business behavior during modernization.
The average hourly rate of freelancers in Frankfurt, Germany who have used Mainframe in their recent projects is 113 €, which corresponds to a daily rate of about 906 € based on an 8-hour working day.
Of the freelancers in Frankfurt, Germany who have used Mainframe in their recent projects, 73% hold at least a Bachelor's degree, 27% hold at least a Master's degree, and 9% hold a doctorate.
On average, freelancers in Frankfurt, Germany who have used Mainframe in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 1.8 years.
The most common languages among freelancers in Frankfurt, Germany who have used Mainframe in their recent projects are German (100%), English (100%), and Spanish (23%).
The most common industries among freelancers in Frankfurt, Germany who have used Mainframe in their recent projects are Banking and Finance (85%), Information Technology (85%), and Professional Services (54%).
The most common business areas among freelancers in Frankfurt, Germany who have used Mainframe in their recent projects are Information Technology (100%), Project Management (100%), and Operations (92%).
Main locations of FRATCH Experts, who have recently used Mainframe
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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