X.509 Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used X.509
André Beran
Last position:
External Attack Surface Assessment & Cybersecurity Readiness Checks at Graydaxe Cybersecurity GmbH
- Conducting cybersecurity readiness checks based on an in-house assessment methodology
- Analyzing the external attack surface using the Graydaxe EASM platform
- Assessing maturity levels and deriving prioritized recommendations for action
Stanislaus Stelle
Last position:
Security Consultant at Rohde & Schwarz AG at Star Labs GmbH
- Worked on FPGA enhanced network encryption device with secure boot, TPM2.0 and smart card integration for BSI approved usage with Post Quantum Cryptography
- Developed and audited Linux drivers
- Collaborated using GitLab, Gerrit, Confluence and Jira
- Technologies: C, C++, Secure Boot
David Skowronek
Last position:
In-house apps at German lab
Delivered high-impact features and bug fixes for existing mobile apps, enhancing user experience and improving overall performance
Spearheaded migration of multiple applications to their latest versions, ensuring seamless continuity and minimizing downtime
Contributed to implementation of CI/CD pipelines using GitLab, streamlining development processes and increasing efficiency
Designed and developed a brand-new in-house application, providing innovative solutions and supporting business growth
Rupesh Kumar Sendge
Last position:
IT Baseline Compliance Consultant at Consultant
- Baseline compliance verification against MAS audit findings
- Building technical architecture concept for 30 technologies to build hardening standard artifacts
- Identifying and building automation possibilities for given technologies based on CIS
- Building the standard baseline configuration based on internal security standard
- Responsible for building Cloud Native Application Protection Platform (CNAPP) architecture artifacts based on Azure cloud platform
- Responsible for RFQ and RFP for different CNAPP solutions (Qualys Total Cloud, CrowdStrike, Azure Security Center)
- Supporting compliance verification and validation via automated scripts for a sample population of IT devices and instances
- Responsible for complete vulnerability management lifecycle using Nexpose, remediation, reporting and integration of results with Splunk, HPSM and Tableau
- Audit support for MAS
Pierre Gronau
Last position:
Ansible Automation, Windows Third Level Support at DB InfraGO AG
- PRISMA project
- Ansible automation
- Windows third level support for Windows NT, Windows 2000, Windows 2013, Windows 2016, Windows 2019
Matthias Weigel
Last position:
Self-employed at maweos GmbH
Michael Kuschel
Last position:
DevOps, Linux Administrator, Infrastructure, Security at ERGO / ITErgo
- Installation, design, maintenance, and further development of the server farm, covering hardware and software.
- Migrating live systems while minimizing downtime.
- Handling tickets and changes in daily operations.
- Documenting changes and processes in Confluence.
- Test runs in the development environment.
- Configuration and administration of Linux systems.
- Configuration and administration of backup systems (Dell Networker, DataDomain).
- Administration of the Checkpoint firewall.
Nils Bokermann
Last position:
Senior Architect at Seghorn GmbH
- Independent builds of components through smart interface design
- Ensuring availability with a decoupled software architecture
- Java implementation
- Technical leadership of developers through code reviews
Yoav Netzer
Last position:
Freelance Software Architect at Freelance Consultant
- Various small consultations, e.g. concepts and arcitectures.
- Updating my Matlab, Linux, IPv6, Cyber-Security, C++ (up to 23) and Python skills.
Hanno Kolvenbach
Last position:
Vice President, Product Development at EdgeIQ, Inc
- Responsible for EdgeIQ Symphony, a low-code workflow orchestration platform for the Connected Product Economy
- Developed an IoT platform that can scale to millions of devices and billions of processed events
- Flexible platform design allows management of heterogeneous device fleets
- Integration with modern IoT technologies like MQTT, LWM2M, x509 certificate-based authentication, TPM2.0-hardware encryption
Jan Mönnich
Last position:
Interface project at HR Solutions GmbH for Rhineland-Palatinate / BAMF at HR Solutions GmbH
- Developed an adapter from the central foreigner register to an internal application
- REST, JSON, OpenAPI, Spring Boot, Vue, Java, Maven, XAusländer
- Jira/Confluence/GitHub, Scrum+Kanban
Rashid Ibragimov
Last position:
Java Developer at IT company
- Data transformations
- IT company with more than 100 employees
- Software production
- Data augmentation and normalization, image transformation, format conversion, merging data from multiple sources
- Toolset: Java, Helm, Kubernetes, Kafka, OpenCV, IntelliJ IDEA, Gradle, Git, Docker, Containers, Scrum
Michal Budzyn
Last position:
Senior Golang Engineer at STACKIT / Schwarz Gruppe
- Responsible for software engineering and DevOps in the Data & AI Platform - Intake and PubSub projects at STACKIT, the cloud provider of the Schwarz Group.
- Technologies: Golang, Kubernetes, Kubernetes operators, OpenAPI v3, REST API, Azure DevOps, CI/CD, k6, Kafka, Strimzi, Apache Iceberg, RBAC, IAM, Terraform, Helm, Infrastructure automation, Load balancing, Traefik, ArgoCD, kuttl, Kyverno chainsaw, Kustomize, Velero, Prometheus, Grafana, Checkly / Playwright (TypeScript), NATS/Jetstream, WebSockets, gRPC, SSE
Henning Petersen
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.
Dirk Pelzer
Last position:
IT systems and security engineer at Self-employed consulting engineer
Discover over 15,000 top freelancers
Statistics of experts using X.509
Aggregated from the professional profiles of matched freelancers.
Experience
26 years
Position duration
2.7 years
Positions per freelancer
21
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Telecommunication
Certification focus areas
Information Technology, Product Development, Logistics
Bachelor's degree or higher
100%
Master's degree or higher
73%
Doctorate
18%
Certifications per freelancer
4
Most common languages
German, English, Russian
Speak two or more languages
100%
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 Germany 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 Germany using X.509
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
What X.509 covers
X.509 is the standard behind digital certificates used to prove identity and build trust across secure systems. It appears in TLS, mutual TLS, client authentication, code signing, device identity, and document signing. Teams often search for X.509 certificates, PKI, or certificate management when they need this work done.
Where it is used
- HTTPS and API security
- Internal service-to-service trust
- VPN, SSO, and access control
- Signing software, firmware, or documents
- Device and IoT identity
Strong specialists know how certificates fit into real infrastructure, not just theory. They handle issuance, validation, renewal, revocation, and chain building across servers, gateways, and apps.
Skills that matter
Good professionals understand public key infrastructure, certificate authorities, key pairs, SANs, extensions, and trust stores. They also know how to work with OpenSSL, Java keystores, cloud certificate services, and load balancers. In Germany, they often support mixed environments where legacy systems and modern TLS policies have to work together.
Common project signs
Companies usually bring in freelance expertise when certificates expire too often, chains fail, or a rollout needs cleaner trust design. It also helps when moving from self-signed certificates to managed PKI, or when audits require clearer certificate handling. A strong specialist writes down the process so operations teams can keep it stable.
What strong experts deliver
The best experts check the full trust path, confirm algorithms and key sizes, and remove weak or outdated settings. They can design certificate rotation, troubleshoot handshake errors, and align applications with security policy. They also know how to balance compatibility, automation, and operational simplicity.
Working model
X.509 work can be remote or on-site depending on the systems involved. Remote collaboration fits certificate policy, automation, and app integration well, while on-site time can help with sensitive environments or production changes. For teams in Germany, clear documentation and concise communication in English are often enough for day-to-day delivery.
Frequently asked questions
Not sure where to start with X.509? These answers cover the essentials.
X.509 is used to prove identity with digital certificates. Companies rely on it for HTTPS, mutual TLS, VPN access, code signing, document signing, and device authentication. It is the trust layer that lets systems verify who they are talking to.
X.509 is the certificate standard, while PKI is the wider system around issuing, managing, and trusting those certificates. When people say X.509 certificates, they usually mean the certificate format defined by the standard. In practice, the work often touches CA policy, revocation, and trust stores too.
Bring in a X.509 specialist when certificate renewals are risky, TLS handshakes fail, or you need a cleaner trust design. It also helps during platform migrations, cloud moves, and security reviews. A freelance expert is useful when your team needs focused help without adding a permanent role.
A strong X.509 expert should know TLS, OpenSSL, PKI, certificate authorities, and key management. They often work with Java keystores, NGINX, Apache, load balancers, and cloud certificate services. For infrastructure-heavy work, automation and scripting are also important.
A small certificate fix may need only targeted X.509 expertise, but larger trust or PKI changes need someone who has handled production systems before. The risk rises when many services, devices, or teams share the same certificate chain. For those projects, depth matters more than broad general knowledge.
Good X.509 work is clear, documented, and easy to operate later. Look for correct chain validation, sane key and algorithm choices, clean renewal steps, and a plan for revocation and rotation. Strong experts also explain trade-offs in plain language and leave fewer hidden assumptions.
Yes, most X.509 work can be done remotely because it centers on configuration, review, and troubleshooting. On-site time is mainly useful when access is restricted, production changes are sensitive, or hardware-backed trust is involved. For teams in Germany, remote work usually pairs well with clear written handover.
X.509 certificates are built for certificate-based trust and fit naturally into TLS, enterprise PKI, and signed artifacts. SSH keys are usually used for server login and Git access, not for the same certificate hierarchy. The right choice depends on whether you need managed identity at scale or simpler direct key trust.
The average hourly rate of freelancers in Germany who have used X.509 in their recent projects is 113 €, which corresponds to a daily rate of about 902 € based on an 8-hour working day.
Of the freelancers in Germany who have used X.509 in their recent projects, 100% hold at least a Bachelor's degree, 73% hold at least a Master's degree, and 18% hold a doctorate.
On average, freelancers in Germany who have used X.509 in their recent projects have 26 years of professional experience, with a single engagement typically lasting around 2.7 years.
The most common languages among freelancers in Germany who have used X.509 in their recent projects are German (100%), English (100%), and Russian (13%).
The most common industries among freelancers in Germany who have used X.509 in their recent projects are Information Technology (93%), Banking and Finance (67%), and Telecommunication (60%).
The most common business areas among freelancers in Germany who have used X.509 in their recent projects are Information Technology (100%), Product Development (73%), and Project Management (60%).
Main locations of FRATCH Experts, who have recently used X.509
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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Philipp Thomaschewski
FRATCH CEO
