Freelancer profile translated to English.

Description

I am a Senior Full-Stack AI & Data Engineer with a passion for scalable, data-driven solutions. With years of experience in machine learning, cloud architectures, and full-stack development, I help companies develop intelligent systems and automated workflows – from data processing and AI models to software integration. As a multi-certified developer, I have worked as an IT consultant with companies such as Allianz, Commerzbank, the German Football League, and HSBC. My focus is on data pipelines, AI and Generative AI models, API development, and cloud architectures – from data processing with Python & SQL to backend development with FastAPI & Node.js to scalable deployments in AWS & Kubernetes. What particularly distinguishes me? I take responsibility for the entire project – not just individual components. My clients value my end-to-end mindset, my ability to solve complex problems, and my pragmatic approach to software development.

Languages

German
Native or bilingual
English
Fluent
Polish
Fluent

Workplace preferences

Remote only

Primarily works remotely

Public Cloud Group GmbH
Senior Machine Learning Engineer
March 2024 - March 2025 (1 year and 1 month)
Berlin, Germany
Led the development of a RAG knowledge platform using AWS CDK, Lambda, Cognito, API Gateway, S3, and Bedrock, optimizing OpenSearch with LLM-based semantic splitting, resulting in significant time savings for marketing and medical professionals.

Built a Python package for extracting predefined keywords from candidate resumes, utilizing Bedrock, Jinja, and YAML, enhancing candidate selection efficiency and quality.

Directed a PoC email classification platform using Amazon Comprehend, fine-tuning a custom classification model to achieve 92% accuracy, and implemented automated endpoint management for cost savings.
AllCloud
Data & Software Engineer - AI & Data Analytics
July 2022 - November 2023 (1 year and 5 months)
Berlin, Germany
Led a team in developing a data platform utilizing AWS services (API Gateway, S3, Redshift, Kinesis, Glue, SQS, SNS) and Apache Airflow. Ensured seamless orchestration via AWS StepFunctions and AWS CDK, while integrating continuous integration and deployment (CI/CD) principles with GitLab.

Developed an asynchronous processing system for real-time language translation,leveraging AWS Transcribe, Translate, and Polly to manage continuous audio streams.

Co-created an AI-translation platform, leveraging AWS services and SageMaker Augmented AI, to create an AI-empowered translation solution. The solution automated translations,reducing manual effort and costs, while maintaining quality through human review of translations.
DELOITTE
Consultant | Machine Learning Engineer - AI & Data Analytics
May 2021 - June 2022 (1 year and 1 month)
Berlin, Germany
Developed and automated a SageMaker-based recommender model pipeline, leveraging CDK, Step Functions, S3, and ECR. Enabled model retraining and deployment on new data, with Lambda for performance checks and automated endpoint updates for real-time application recommendations.

Executed a ransomware identification POC using software log data. Managed data preparation, feature engineering, and EDA for time-series datasets. Developed and refined LR and XGBoost models. Enhanced XGBoost accuracy to 90%, F1-Score to 0.87 and ROC- AUC to 0.93. Implemented cross-validation and hyperparameter tuning to mitigate overfitting.