Backend
Python services, REST APIs, serverless applications, and event-driven workflows.
Yonatan Pepper
Backend/cloud developer working with Python, AWS Lambda, Kafka/MSK, SQS, Terraform, and CI/CD for live services.
Profile
Backend and cloud development with ownership across code, infrastructure, and operations.
Yonatan is a backend and cloud software developer based in Dresden, Germany. His recent work focuses on AWS-based event-driven systems, Python Lambda services, Terraform infrastructure, CI/CD, automated testing, and production monitoring.
He has owned selected backend and cloud features from infrastructure design through implementation, release checks, and operational monitoring, including notification workflows serving up to 40 million monthly active users.
Tech Stack
Core technologies used in production.
AWS Cloud
Lambda, MSK/Kafka, SQS/DLQ, S3, API Gateway, EventBridge, CloudWatch, Secrets Manager.
Delivery
Terraform, Docker, GitHub Actions, CI/CD pipelines, SonarQube, and Linux environments.
Quality
Unit tests, integration tests, static analysis, and release checks tied to CI workflows.
Automation
Selenium, SAP GUI Scripting, RPA workflows, OCR tooling, and recurring operational automation.
AI-assisted Workflows
AI-assisted development workflows used with task decomposition, tests, and review safeguards.
Selected Technical Work
Concrete work across backend services, infrastructure, and automation.
Serverless Notification Pipeline
Led implementation of selected backend and cloud features for an AWS-based notification pipeline in an international multi-service system.
- Supported notification workflows for up to 40 million monthly active users.
- Implemented Terraform-managed Lambda, MSK/Kafka, SQS/DLQ, S3, and CloudWatch resources.
- Built Python Lambda services for event processing, integration, and failure handling.
- Improved release reliability with automated tests, SonarQube checks, and CI/CD workflows.
Automation and RPA Workflows
Built Python automation for customer environments, browser-based processes, enterprise application tasks, and recurring operational work.
SeleniumSAP GUIPython
OCR Document Processing
Designed OCR workflows with Tesseract, OpenCV, and Azure AI Document Intelligence to extract structured data from documents and support downstream automation.
TesseractOpenCVAzure AI
Ambient Assisted Living Research
Developed asynchronous openHAB integrations for multiple sensor systems as part of Diplom thesis research in Ambient Assisted Living, including night-light and fall-detection scenarios.
openHABAsync systemsSensors
Experience Timeline
Roles focused on backend implementation, infrastructure, automation, and delivery quality.
May 2024 - Present
CGI Deutschland
Senior Cloud Software Developer
Owns selected backend and cloud features across AWS infrastructure, Python Lambda services, operational monitoring, and release reliability.
Lead Developer, May 2024 - Aug 2025; Senior Developer, Aug 2025 - Present
Oct 2021 - May 2024
Deutsche Telekom MMS GmbH
Junior Software Engineer
Built Python automation and RPA solutions for browser and enterprise workflows, developed OCR document processing, and contributed to fiber rollout tooling with desktop and GIS components.
Oct 2019 - May 2024
University of Applied Sciences Dresden
Diplom degree, comparable to M.Sc.-level studies
Thesis research in Ambient Assisted Living with asynchronous integrations for multiple sensor-driven smart home systems.
Certifications & Skills
Validated foundations for cloud, backend, and architecture work.
PCEP - Certified Entry-Level Python Programmer
Python Institute certification covering Python fundamentals, syntax, data types, control flow, functions, modules, and basic programming practices.
iSAQB Certified Professional for Software ArchitectureSoftware architecture certification covering architecture design, documentation, quality attributes, and technical communication.
Flowable Foundation CertificationCertification for Flowable concepts, process automation, workflow modeling, and BPMN-oriented application development.
Contact
Contact
Dresden, Germany / available for backend, cloud, automation, and infrastructure engineering conversations.