HDLC Experts in Germany
for reliable data links, matched in minutes with vetted and available freelancersHire experts who design, configure and troubleshoot synchronous HDLC links, Cisco and router environments, and legacy WAN connections. Get precise AI matching with vetted, available freelancers who can work remotely or on site in Germany.
Meet FRATCH Experts in Germany, who have recently used HDLC
Silvia B.
Last position:
Business Consultant - Product Management Banking at Aareal Bank AG
- Focus on optimizing and further developing the internal customer EBICS application
- Functional and technical consulting for Aareal First Financial Solutions AG on EBICS standard products and applications in the areas of operations and further development, as well as project-related communication with external development partners and the product manufacturer to implement the corresponding technical optimizations
- As the functional coordinator, providing advice on content-related and regulatory requirements as well as technical prerequisites and requirements, and bringing these together at the functional level
- Consulting on the use of EBICS formats
- Reviewing the current EBICS standard for optimization and further development potential
- Analyzing the current state to identify development potential and deriving appropriate recommendations for action while considering regulatory requirements
- Conducting EBICS tests throughout the project
- Functional responsibility for requirements management and, in this context, recording and documenting requirements for such tests
- Designing a functional and sustainable test management system
- Conducting and evaluating tests
- Consulting on sustainable quality assurance and audits
- Project language: German and English
- Tools/Methods: MS Project, MS Office, MS Visio, TestRail, Confluence, Jira, Business Logics Bankkrecher, Business Logics Test Data Generator, Business Logics Banking Tool, Business Logics Test System, DBEAVER, Squirrel, Unix Virtual Machines, WinSCP, Kitty, Putty, various Aareal Bank products, Online Banking Portal, Aareal Sign, core banking system, SAP Blue Eagle, SAP RE-FX, Aareon Wodis Sigma, Haufe Real Estate Wowinex, GAP Group Immotion, UTS Karthago, SAP IS-U/Waste, SIV kVASy, various EBICS clients
Mustafa K.
Last position:
Senior Network Design and Engineer at Helaba
Designed and specified the technical network integration of a new business critical application system (MUREX) in the capital market area in a complex interface and outsourcing environment.
Created component specifications, catalog of measures and implementation plan.
Ensured proper integration of developed results in accordance with the bank’s framework: IT compliance, IT security, change and release management.
Selected and integrated a new service provider for the bank; moved critical bank applications to the provider.
Designed, implemented and supported the new Cisco network and Fortinet security setup at the service provider data center.
Acted as technical interface between bank, service providers and consulting partners.
Supported and further developed the network and security infrastructure (clients, servers, networks); performed error analysis and implemented solutions within agreed service levels.
Analyzed and diagnosed all security and network failures, glitches and malfunctions.
Initiated continuous enhancements to guarantee efficient resource utilization and acceptable response times to users.
Provided network support in financial service organization and operational change preparation on production banking network infrastructure for both large and small projects within strict change management discipline.
Designed, defined, tested, governed and improved engineering standards.
Performed role of network architect for medium-large projects involving team resources.
Paul P.
Last position:
Independent Consultant – Industry/ Embedded/ IoT at Self-employed
Consulting and support in the areas of sales/business/technology/development/marketing:
- Sales, Key Account Management
- Business Development, business/corporate development
- Partner management
- Program/project management
- Product management & marketing
- Technical marketing, content marketing
- New business, innovation and technologies
Until July 2021 active as advisor and consultant for Mixed Mode in the areas of Key Account Management, Project Management and Business Development.
From Q3/2021 successful delivery of various customer projects in the area of Business Development, corporate development, consulting, coaching, technical content management, sales and marketing:
- EMS service provider and PCB test house, inspection systems: revision of company portfolio and presentation. Integration of specialized distribution for optical inspection systems from Japan: content management, marketing, communication, web, sales automation, lead generation
- Full service marketing agency – technology marketing for industry: expansion of the existing B2B and B2C marketing portfolio with industrial and technology topics: content management, presentation and focus on "technical marketing", web, target market and customer analysis, lead automation, consulting
- Software product manufacturer & software development in the field of security for Embedded & IoT: company alignment and portfolio definition for an IoT and Embedded Security company with a SaaS solution for IoT device management: building a partner network to offer complete Embedded/IoT security solutions, technical content, company alignment and portfolio definition, strategy & planning, target market and customer analysis, product marketing/USPs for the security device management tool "IoT-Suite", standards and regulations for cyber resilience (e.g. CRA, NIS2, RED), web content, SEO, management of marketing and sales agencies, CRM, sales, presentations, trade fairs, congresses, building company webinars & events
- Software engineering service provider/system house for IoT, Embedded, web, mobile and desktop applications: business development, content creation, customer acquisition and sales
- Manufacturer of memory products with security features as an add-on: memory products in standard form factors (SD, CF, SSD...) are extended with security modules such as HSM, TPM or secure elements and thus offer users secure data storage, transfer and access. Also interesting as an upgrade or retrofit solution to meet the coming new regulations and requirements regarding cybersecurity such as CRA, RED and NIS2. Business & New Business Development for the area "Embedded IoT Solutions & Security", sales & marketing. Expansion of the pure semiconductor business to include security solutions and services. Interface between management, marketing, sales and product management. Building business partners, technology partners, system integrators and resellers from the Embedded, IoT, OT and IT environment. Creating reference designs/demos/lighthouse cases and proof of concepts for cross- and reference selling. Co-marketing with security partners. Technical content creation for web, sales and marketing, webinars, social media etc. Networking, participation in trade fairs, congresses and events. Lead generation, qualification, follow-up and conversion to customer. Product definition, USPs, features. Analysis of competitors, market positioning, target markets - strategy, concept and measures - go to market.
- Marketing agency group with sales and management consulting: consulting for companies on restructuring, market analysis and market entry, go-to-market concepts, customer acquisition and expansion, new customer generation, lead generation and management, concepts and execution of campaigns (web, mail, social media, phone outreach in person or with AI voice assistant, webinars...). Processing and managing customer product data for PIM product information and DAM data asset management systems. Focus on customers in the industrial and technology environment with products and services that need explanation.
Luca P.
Last position:
ERP Program Manager at Fiserv
The customer is undergoing a comprehensive transformation. All SAP ECC landscapes worldwide are being migrated to SAP S/4HANA, with the goal of introducing a standard template worldwide.
The program also includes the “RISE with SAP” migration and modernization program, which may involve migrating the landscapes of selected country installations to the SAP Private Cloud.
On the stakeholder side, the program reporting line extends to the company’s executive board and that of the implementation partner.
Fiserv Germany’s ERP landscape currently includes several non-standard SAP tools and applications that extend the functionality of the ECC environment and can often be integrated into downstream systems. As part of the transition to SAP S/4HANA, it is essential to assess the core functionality, integration points and future viability of these applications in order to determine their alignment with the target architecture.
The focus of the work is on providing expert advice and assessment to define the scope, strategy and roadmap for transitioning Fiserv Germany’s SAP ECC system to SAP S/4HANA.
The recommended best practices from SAP are followed and a structured approach is used to ensure a smooth transition with minimal disruption while maximizing business value.
This assessment forms the basis for a successful SAP S/4HANA transformation and ensures alignment with industry best practices, regulatory compliance and future scalability.
Migration Strategy Definition – assessment of available transition approaches based on business objectives, technical feasibility and SAP Best Practices.
Technical Readiness Assessment – conducting a system analysis to assess compatibility, custom code impact, data volume management, integration points and infrastructure readiness for SAP S/4HANA.
Business Process Impact Analysis – reviewing the latest business process documentation to define the scope and effort required to implement the necessary functions in SAP S/4HANA and to identify opportunities for process optimization.
Roadmap for Non-SAP Systems and Applications – assessment of third-party and legacy applications regarding their integration with SAP S/4HANA and recommendation of consolidation, migration or replacement strategies.
Deployment & Implementation Planning – defining a phased approach for implementation, including project schedules, risk mitigation strategies and key milestones aligned with business priorities.
This transformation takes place in phases: the Discovery phase leads to the Explore phase, which is followed by the Design phase and finally implementation.
Program management
Change management
Requirements management
Transition management
Stakeholder management
Risk management
Comprehensive coordination
Uwe S.
Last position:
Software Developer Embedded Systems at Self-employed
Ould Aly I.
Last position:
Functional Safety Assessor at VW
- Pre-assessments and review of functional safety status for ADAS ECUs and body controller components
- Conduct functional safety audits
- Review the functional safety status of the E3 1.2 in a pre-assessment
- Document interviews
- Document findings and generate internal reports
Methods:
- ISO26262
- Automotive SPICE Level 2, 3
- Agile methods, SAFe
Tools:
- DOORS
- Enterprise Architect
- JIRA & Confluence
- IQ-FMEA
- Isograph
Michael D.
Last position:
Consultant Software Architect at Railway Systems Company
- Model based UML software design for safety critical level SIL-4 interlocking rail traffic system, according to CENELEC 50128 and IEC 62279 standards.
- Skills: CENELEC 50128, IEC 62279, UML Rhapsody code generation, IBM Engineering Workflow Management (EWM), DNG RM requirements tool, Design Patterns, software functional safety, Risk Control Measures, SCRUM.
Discover over 15,000 top freelancers
Statistics of experts using HDLC
Aggregated from the professional profiles of matched freelancers.
Experience
37 years
Position duration
4.4 years
Positions per freelancer
19
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Manufacturing, Telecommunication
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
100%
Master's degree or higher
67%
Certifications per freelancer
4
Most common languages
German, English, French
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 Germany 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 Germany using HDLC
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.
HDLC 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%)
- Manufacturing (71%)
- Telecommunication (71%)
- Aerospace and Defense (43%)
- Automotive (43%)
- Energy (43%)
- Banking and Finance (43%)
- Advertising (29%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Protocol fundamentals
HDLC, or High-Level Data Link Control, is an ISO-standard, bit-oriented data-link protocol for reliable communication between network nodes. It provides framing, flow control, error detection and link management over synchronous serial connections. Its frame structure includes flags, addresses, control information, payload data and a frame check sequence.
Where HDLC runs
HDLC is used on point-to-point serial links, leased lines, industrial communication systems and network connections where predictable framing matters. Variants such as Cisco HDLC appear in router-to-router links, while related procedures such as LAPB support packet-switched environments. In Germany, specialists may encounter it in established enterprise, carrier and industrial networks.
- Connect synchronous serial interfaces
- Maintain router-to-router WAN links
- Support legacy network equipment
- Diagnose framing and encapsulation faults
Ecosystem and tooling
HDLC work often sits alongside Cisco IOS, Juniper Junos, serial interface modules, CSU/DSU equipment and network monitoring tools. Strong specialists understand clocking, DCE and DTE roles, encapsulation settings, CRC errors, keepalives and interface states. They also work with PPP, Frame Relay and Ethernet when a link must be migrated or integrated.
When companies need specialists
Freelance expertise is useful when a serial link is unstable, a network device must be replaced, or an old WAN connection has to remain available during a transition. Professionals can audit configurations, map dependencies, test failover and document the final design. They can also separate protocol faults from cabling, clocking or carrier issues.
- Investigate intermittent line failures
- Replace or reconfigure serial routers
- Plan HDLC-to-PPP migrations
- Validate link performance and resilience
What strong professionals deliver
A capable HDLC specialist starts with interface roles, encapsulation compatibility and physical-layer evidence instead of changing settings at random. They use packet captures, interface counters, logs and controlled tests to isolate faults. Their deliverables usually include a verified configuration, a test record, rollback steps and clear operational documentation.
Choosing the right fit
Look for practical experience with the exact router vendors, serial hardware and carrier services in scope. Ask how the professional would investigate CRC errors, mismatched encapsulation or a link that reports up but passes no traffic. Remote work is often suitable for configuration and analysis, while on-site access may be needed for cabling and legacy equipment; German and English collaboration can both be relevant in local network teams.
Frequently asked questions
Questions about HDLC? Start with the answers below.
HDLC is used to frame and control data on synchronous serial links. Companies typically apply it to point-to-point WAN connections, router links, leased lines and some industrial communication systems where reliable link control is required.
HDLC provides straightforward framing and error detection, making it suitable for compatible point-to-point equipment. PPP offers broader interoperability and features such as authentication, multilink support and network-layer negotiation, so it is often preferred when different vendors or flexible configuration are involved.
A strong HDLC professional should also understand IP routing, subnetting, serial cabling, clocking, DCE and DTE roles, and WAN troubleshooting. Experience with Cisco IOS or Junos, PPP, Frame Relay and monitoring tools is useful when links connect older and newer equipment.
The right level of experience depends on the task. A simple configuration review may need focused protocol knowledge, while a production migration or recurring fault investigation calls for a professional who has handled serial hardware, carrier dependencies and rollback planning.
HDLC configuration reviews, log analysis and many troubleshooting steps can be completed remotely with secure access and reliable documentation. On-site work may still be necessary when the issue involves serial cabling, CSU/DSU equipment, physical ports or restricted legacy systems in a German facility.
An HDLC migration commonly involves checking vendor compatibility, documenting the current serial topology, selecting a replacement encapsulation such as PPP, and testing both ends of the link. A careful professional also prepares a rollback plan and verifies routing, monitoring and failover after the change.
Quality HDLC work is traceable and testable. The professional should explain the fault hypothesis, show evidence from counters and logs, document interface roles and settings, and provide repeatable validation steps rather than relying on an unexplained configuration change.
HDLC remains relevant wherever established serial infrastructure must stay reliable or be replaced safely. Freelance specialists are often brought in for legacy WAN support, interoperability checks, controlled migrations and documentation, even when the long-term design will use PPP, Ethernet or another modern transport.
The average hourly rate of freelancers in Germany who have used HDLC in their recent projects is 111 €, which corresponds to a daily rate of about 892 € based on an 8-hour working day.
Of the freelancers in Germany who have used HDLC in their recent projects, 100% hold at least a Bachelor's degree and 67% hold at least a Master's degree.
On average, freelancers in Germany who have used HDLC in their recent projects have 37 years of professional experience, with a single engagement typically lasting around 4.4 years.
The most common languages among freelancers in Germany who have used HDLC in their recent projects are German (100%), English (86%), and French (57%).
The most common industries among freelancers in Germany who have used HDLC in their recent projects are Information Technology (100%), Manufacturing (71%), and Telecommunication (71%).
The most common business areas among freelancers in Germany who have used HDLC in their recent projects are Information Technology (100%), Product Development (86%), and Project Management (86%).
Main locations of FRATCH Experts, who have recently used HDLC
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
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