You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Mr. SchaffmanMS

Mr. Schaffman

Professional Database Architect

€540/day
Berlin, DE
3-7 years

Average response time: 1 hour

About Mr.

Database Architect | PostgreSQL & Oracle | HA/DR | Linux & Windows
with a Master degree in Computer Engineering, and a Bachelor in Physics. I focused on building resilient, scalable, and enterprise-grade data platforms across Windows and Linux environments.

Core Expertise
  • HA/DR architecture and business continuity planning
  • PostgreSQL design, performance, and operations
  • Database migrations (SQL Server / Oracle → PostgreSQL)
  • Windows Failover Clustering & Linux administration
  • Replication, backup, and recovery strategies
  • Infrastructure validation and risk analysis
  • Network design & Active Directory integration
  • PowerShell and Bash automation

Architecture & Resilience
  • Designed Windows Failover Cluster solutions for continuous service availability
  • Defined RPO/RTO objectives and aligned technical solutions with business requirements
  • Engineered cluster networking (VIP, DNS integration)
  • Removed single points of failure across infrastructure layers

PostgreSQL Platforms
  • Delivered highly available PostgreSQL architectures for enterprise workloads
  • Implemented clustering, replication, and automated failover mechanisms
  • Built robust topologies to ensure stability under critical workloads
  • Produced production-readiness documentation and validation deliverables

Modernization & Migration
  • Led transformation of legacy database platforms to PostgreSQL
  • Performed compatibility analysis and schema conversion planning
  • Designed target HA architectures on Windows Server environments
  • Established rollback strategies to secure migration processes
  • Reduced licensing costs and supported platform standardization

Collaboration & Governance
  • Coordinated with infrastructure, network, security, and application teams
  • Contributed to cross-domain architecture alignment
  • Defined governance models supporting PostgreSQL adoption

Approach
  • I use data driven analysis and designs
  • French

    Native or bilingual

  • German

    Fluent

  • English

    Fluent

Can work on-site
Berlin (up to 50km)

Experience

  • Dassault Systèmes
    CAD Assistant Chatbot – Streamlining Access to CAD Documentation
    SOFTWARE PUBLISHING
    November 2024 - February 2025 (3 months)
    Berlin, Germany
    I developed an intelligent chatbot for a CAD software company to help users quickly access documentation and tutorials, reducing the learning curve and support requests. The chatbot interacts naturally with users, understands their queries, and provides contextual guidance within the software environment.

    Key Features:
    • Natural Language Processing (NLP): Users can ask questions in plain language, and the bot interprets and responds accurately.
    • Contextual Assistance: Links to tutorials, guides, and FAQs based on the user’s current workflow or task.
    • Integration: Embedded directly within the CAD platform or via web portal for seamless support.
    • Continuous Learning: Logs user interactions to improve responses and suggest additional resources over time.
    • Analytics: Tracks common queries and areas where users struggle, providing insights to improve software documentation.

    Technologies Used: Python, Node.js, NLP libraries (SpaCy, HuggingFace Transformers), React for frontend integration, REST APIs for documentation retrieval, optional Docker deployment.

    Outcome/Impact:
    • Reduced support requests and user frustration.
    • Accelerated onboarding for new users of the CAD software.
    • Enabled the company to maintain up-to-date, self-service documentation accessible at any time.
    NLP Langchain RAG
  • Psy solutions
    Fullstack Developer
    HEALTH AND WELLNESS
    July 2024 - Today (1 year and 11 months)
    Berlin, Germany
    Tepavi is an innovative platform based in Berlin that simplifies access to psychotherapeutic care in Germany.

    It provides private therapists with turnkey solutions to handle patients on third-party billing with minimal administrative effort, while helping patients access outpatient therapy quickly, even when conventional practices have waiting lists.

    As a fullstack developer at Tepavi, I was responsible for designing and maintaining technical solutions that automate complex administrative workflows for patient management. My key responsibilities included:
    • Web application development – Creating intuitive user interfaces for therapists and patients to manage cases, submit claims, and track progress.
    • Workflow automation – Implementing automated systems for processing care requests, reducing processing time and human errors.
    • Third-party integrations – Connecting with health insurance databases to verify patient eligibility and ensure accurate billing.
    • Performance optimization – Enhancing application scalability and security to handle large numbers of concurrent users efficiently.
    • Cross-functional collaboration – Working closely with management, therapists, and patients to gather feedback and continuously improve tools

    Technologies Used
    • Frontend: React, Nextjs, Tailwind CSS
    • Backend: Node.js, Python
    • Databases: MySQL, Postgre
    • Automation: n8n
    • DevOps: Docker, GitLab CI/CD

    Impact of My Work

    Through these developments, Tepavi is able to:
    • Reduce processing times for care requests from several weeks to just a few days.
    • Improve patient satisfaction by providing faster access to necessary therapy.
    • Ease administrative burden for therapists, allowing them to focus more on patient care.
    • Ensure regulatory compliance with insurance requirements, minimizing the risk of disputes.

    https://www.tepavi.de
    Python Next.js

Recommendations

Be the first to recommend Mr.

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Skill set

Categories