DMARC Experts in Germany

agentic-engineer.online is my publicly testable live demo and at the same time the platform where I show my work. Originally created as a recruitment trial task, I have since continued to run it as my own demo, learning, and product project — on a Hetzner VPS behind a Cloudflare tunnel, through a multi-stage AI-orchestrated deploy pipeline with snapshot rollback. If a deploy step breaks, the system falls back to the last clean snapshot, the script is adjusted, the test repeated — empirical, test-driven, without hand tuning.

• Technically behind it: Python and FastAPI, an OpenRouter model cascade, SQLite persistence, and Cloudflare edge tuning.
• I am the developer and the strictest customer of my own AI work in one person — what started as a prototype has become a tool I use every day and against which I test my own products.

• Self-employed since 2008 in planning, developing, and supporting custom software, web, and system solutions for clients as well as my own projects.

• Complete technical implementation of projects — from requirements analysis and architecture to programming, release, maintenance, and further development.

• Development of database-driven web applications, customer portals, admin interfaces, ordering processes, user and permission management, and custom backend functions.

• Design and development of REST APIs, webhooks, microservices, and interfaces to reliably connect different applications and external services.

• Implementation of numerous smaller services and automations for data processing, monitoring, notifications, recurring tasks, and technical business processes.

• Development of Telegram bots with the Telegram Bot API, including automated notifications, user interactions, status queries, and control of technical workflows.

• Programming native Android applications in Java as well as developing my own games and interactive applications with Unity.

• Development, extension, and modernization of existing PHP, Java, JavaScript, and MySQL applications, including error analysis, performance optimization, and adaptation of grown codebases.

• Setup and support of Linux-based server environments with Apache and Nginx, as well as management of databases, domains, DNS, SSL certificates, email services, access rights, and backups.

• Development of browser-based automations with Selenium for data collection, checking, and processing of recurring workflows, reducing manual steps and making processes more reliable.

• Independent implementation of complete platforms and web projects, including devpraxis.de, hq-smm.com, and socialboost24.com.

• Many years of technical project support with responsibility for troubleshooting, maintenance, further development, documentation, and stable operation of production systems.

• Quick onboarding into existing applications and unfamiliar codebases to analyze technical problems in a structured way and implement practical, long-term maintainable solutions.

• Direct coordination with clients, clear explanation of technical topics, and independent implementation of agreed requirements.

• By combining software development, automation, and system administration, many tasks can be handled completely from a single source, which reduces coordination effort, technical dependencies, and processing time.

• End-to-end implementations of Marketing Cloud Next (Growth/Advanced), from discovery workshop to go-live — Data 360 (Data Cloud) setup, data streams and mapping, identity resolution rules (match & reconciliation), consent management, Sales Cloud integration.
• Campaign orchestration across the MCN flow types — segment-, event-(forms & engagement), schedule- and record-triggered flows (Salesforce & Data Cloud) plus API-based on-demand sends; segmentation and activation with Data Graphs, Calculated Insights, and Einstein personalization.
• Multilingual email template systems with dynamic, personalized content; deliverability (SPF/DKIM/DMARC) and GDPR-compliant double opt-in journeys.
• Operational support for Marketing Cloud Next orgs in ongoing consulting projects — campaign operations, data quality, performance analysis, and release readiness: campaigns deliver on schedule, credit costs stay predictable.
• At the same time, Account Engagement (Pardot) client projects — audits, implementations, lead scoring & grading; AE-MCN migration assessments; Agentforce grounding and guardrails.

Restructuring email authentication across the entire domain inventory of an international industrial company with 1,000 to 5,000 users: around 45 domains in more than 20 countries.

• Inventory of all domains and classification as sending, non-sending, or unclear; target design for each domain group
• DMARC reporting (rua) as the data basis before any policy tightening, with aggregate reports analyzed over several weeks
• SPF lookup budget (limit of 10 lookups) counted rather than estimated; several assumptions from previous findings were thus disproved
• Analysis of the multi-stage mail flow across on-premises Exchange, Microsoft 365, and security gateways, and its impact on DKIM alignment and SPF
• Assessment of external findings based on evidence: confirmed, false positive, or context-dependent, with justified disagreement presented to the assessor
• Change proposals with before/after state, risk, and rollback; implementation is handled by the customer
• Tenant-to-tenant migration analysis for a group company: read-only audit, technical assessment, management summary, migration paths
• Analysis of a service shared mailbox according to CISO and data protection requirements: anonymized in the transformation layer, without personal data analysis

Technologies: Exchange Online, Exchange Hybrid, Entra ID, Microsoft Graph, PowerShell, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, Power BI