Freelancer profile translated to English.
Back to original languageAbout Sascha
I am a software developer with over 15 years of full-stack experience and co-founder of slon.gmbh.
My focus is on both the implementation of Proofs of Concept and the development of productive, maintainable MVPs. I rely on Agent-Driven Development as an engineering practice, modular backend architecture, and consistent DevOps automation.
How can I support you?
- Implementation of cloud infrastructures on platforms such as AWS and Google Cloud Platform
- Automation of processes to ensure the rapid integration and deployment of your core product
- Implementation of unit, integration, and end-to-end tests, as well as setting up CI/CD pipelines
- Requirements analysis and project management for optimal implementation of your projects
- Frontend and backend development using my preferred technology stack
Technology Stack
Programming Languages / Scripting Languages / Markup Languages
JavaScript / TypeScript, Java, Python, HTML, CSS / SCSS, Bash
Frontend Development
Angular, Remix, Sencha Ext JS, Tailwind CSS
Backend Development
Node.js, Express.js, Prisma, TypeORM
Databases
MySQL, MariaDB, PostgreSQL, Firestore (NoSQL)
Cloud Services and Infrastructure
AWS (EC2, RDS, S3, CloudWatch), Firebase, NGINX, Apache HTTP Server
Testing and Automation
Testing Tools: Cypress, Playwright, Jest, Vitest
Automation Tools: GitHub Actions, Jenkins
German
Native or bilingual
English
Conversational
Can work on-site
Berlin (up to 50km)
Experience
- Horsplanet AG
On Malt
DevOps EngineerSOCIAL NETWORKSAugust 2025 - August 2025 (1 month)Berlin, Germany- Troubleshooting and further development of a Python-based application for reliable data synchronization between marketplace and CRM systems
- Optimization and updating of hosting and deployment processes
- Setup and execution of tests for quality assurance
- Documentation of changes made
- acatech (Deutsche Akademie der Technikwissenschaften e.V.)DevOps EngineerJuly 2025 - Today (11 months)Berlin, GermanyProject: MISSION AI Quality Standard Audit PortalDevelopment of a web application for the voluntary AI quality standard of MISSION AI.The solution is aimed at providers of AI systems as well as auditors and digitizes the entire certification process to ensure smooth, secure, and scalable application of the standard.My ResponsibilitiesConcept and operation of an AWS cloud infrastructure with Terraform as Infrastructure-as-Code. Management of EC2, RDS, S3, and IAM through modular Terraform configurations with workspace-based environment separation. Setup of a central logging and monitoring stack with Loki, Promtail, Prometheus, and Grafana for real-time observability and alerting.
- Concept and setup of a multi-environment infrastructure (Dev, Testing, Prod) on AWS with Terraform as Infrastructure-as-Code.
- Management of AWS resources (EC2, RDS PostgreSQL, S3, IAM, Security Groups) via modular Terraform configurations with consistent tagging strategy.
- Implementation of workspace-based environment separation for isolated and reproducible deployments per environment.
- Setup of PostgreSQL RDS with backup concepts and automated SSL/TLS certificate management.
- Setup of a central observability stack with Loki, Promtail, and Grafana for log aggregation and Prometheus for metrics monitoring.
- Containerization of the application with Docker
- Implementation of automated CI/CD pipelines with GitHub Actions, including smoke and regression tests for quality assurance.
- Support and technical consulting during development, go-live, and post-launch.
Technology Stack- Cloud & Infrastructure: AWS (EC2, RDS, S3, SES), Terraform, Docker, NGINX, SSL/TLS
- Database: PostgreSQL
- CI/CD & Testing: GitHub Actions, Automated Builds. Smoke/Regression Tests
- Monitoring: Prometheus, Grafana, Log Aggregation, Alerting
- Gut Kerkow Fleischmanufaktur GmbHOnline Shop for gut-kerkow.deAGRICULTURESeptember 2023 - Today (2 years and 9 months)Angermünde, GermanyThe project's goal was to develop an online shop for selling groceries with a focus on fresh meat.My tasks:
- Process Management: Analysis of requirements and creation of a detailed project plan. Training the client's team for the use of GitHub Projects
- Implementation of a custom Shopify app to meet specific customer requirements
- Setup and maintenance of the server infrastructure based on AWS
- Setup of an automated deployment process with GitHub Actions
- Implementation of end-to-end tests to ensure software quality
Reviews
Benjamin
Horsplanet AG
Reviewed on 9/15/2025
Sascha helped us greatly with spontaneous, crucial updates to the dependencies of our modal app. Communication was always clear, fast, and pleasant, and his technical expertise was impressive. We at HorseDeal appreciate his reliable work ethic and look forward to a long-term collaboration.
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Education
- Business Mathematics DiplomaTechnische Universität Berlin2013