07.08.2026 aktualisiert

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Python Developer | Azure | AWS | GenAI

Berlin, Deutschland
Weltweit
Master's Degree in Computer Science
Berlin, Deutschland
Weltweit
Master's Degree in Computer Science

Profilanlagen

drienkop_cv_de.pdf

Skills

LinuxDjangoPythonRabbitMQSonarqubeFlaskAWS LambdaCeleryCheckmarxTerraform
Freelance Python developer with a decade of experience working with clients ranging from startups to global corporations, including Rabobank, KPN, Deutsche Telekom, and AT&T. Also trusted by innovative smaller clients such as ManyPets and Verint.

Versatile and adaptable, with a proven track record in industries like telecommunications, networking, security, insurance, and banking.

  1. Cloud & DevOps Azure Cloud, Azure DevOps, AWS (Lambda, EventBridge, SQS, CDK), Jenkins, GitHub Actions, Docker, Kubernetes, Terraform
  2. Languages & Core Tools Python, JavaScript, C, Assembly, Bash
  3. Data & Storage Azure SQL, MongoDB, MariaDB, Redis
  4. Frameworks & Libraries Flask, FastAPI, Django, SQLAlchemy, SQLModel, rabbitmq, Pydantic, pandas, celery, pytest, uv/poetry, ruff, mypy, pre-commit, tox, memray
  5. Miscellaneous TDD, OpenAPI, Grafana, Elasticsearch, SonarQube, Checkmarx, trivy

Sprachen

DeutschGrundkenntnisseEnglischverhandlungssicherNiederländischGrundkenntnisseSlowakischMuttersprache

Projekthistorie

Senior Python Developer (Contract)

Rabobank

Banken und Finanzdienstleistungen

>10.000 Mitarbeiter

  • Led Basel IV (CRR3) implementation, increasing bank’s core capital ratio from 16.9% to 19.9%, unlocking billions in lending capacity and significantly enhancing financial stability
  • Planned and prioritized work (Scrum) in collaboration with Product Owner
  • Implemented multi-tenant database design using dynamic ORM models
  • Optimized memory usage to meet limits, enhancing stability and reducing overhead
  • Introduced feature flags for seamless release management
  • Introduced contract based testing
  • Led Security Design, Threat Modelling and Vulnerability Management to meet DORA, SOx, and
  • ISO 27001 compliancy
  • Tech: Python, Azure Cloud, Azure DevOps, Docker, Kubernetes, Celery, SQLAlchemy, pandas,
  • Docker, Pydantic, Redis, SonarQube, Checkmarx, NexusIQ, trivy

Backend Developer (Contract)

ManyPets

Versicherungen

50-250 Mitarbeiter

  • Developed microservices for transactional email and user management, serving 700k customers
  • Scaled the existing startup codebase into an enterprise-level solution
  • Introduced a new queue based architecture for ingesting and validating Segment events
  • Set up automated linting, static type checking and unit testing
  • Tech: Python, TypeScript, Flask, Django, AWS: Lambda, EventBridge, SQS, CDK, MongoDB,
  • Grafana, OpenAPI, GitHub Actions, TDD

Python Developer (Contract)

KPN

Telekommunikation

>10.000 Mitarbeiter

  • Developed a Flask application used to set up new mobile network base stations
  • Tech: Python, Flask, SQLAlchemy, MariaDB, JavaScrip

Python Developer

Verint

Internet und Informationstechnologie

10-50 Mitarbeiter

  • Android vulnerability research and exploit development
  • Developed a tool for hybrid encryption of Python bytecode with YubiKey
  • Developed a Flask application for web scraping and analyzing firmwares
  • Migrated a Python-based product supporting 2G to 3G in a matter of days
  • Reverse shell TCP optimization
  • Tech: Python, C, ARM Assembly, AWS, MongoDB, Flask, Celery, Jenkins, Docker

Python Developer

Deutsche Telekom

Telekommunikation

>10.000 Mitarbeiter

  • Designed and developed a test automation library in Python still in active use
  • Automated over 50% of the existing mobile network test suite
  • Tech: Python, Unix, Elasticsearch, Flask, Jenkins, Spirent, Appium

Mobile Network Specialist

AT&T

Telekommunikation

>10.000 Mitarbeiter

  • Automated software upgrades for mobile network devices, impacting millions of US customers
  • Tech: Python, Unix, bash

Portfolio


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