Freelancer profile translated to English.
Back to original languageAbout Andreas
Since 2021, I have been offering innovative, tailor-made software solutions as an independent backend developer. My focus is on serverless / container-based architectures and modern databases, particularly using Node.js and Nest.js. I integrate AWS cloud services for scalable and secure applications optimized for user experience and performance. Agile methods and continuous integration accompany my development process to deliver high-quality software.
German
Native or bilingual
Remote only
Primarily works remotely
Experience
- Auf AnfrageBackend DevelopmentLOGISTICS AND SUPPLY CHAINJuly 2022 - March 2023 (9 months)Hamburg, Germany
- Improving MongoDB aggregations to achieve faster database access
- Participation in various microservices for communication and integration of IoT devices
- Implementation of communication via NATS for real-time data transfer between microservices
- Implementation of REST routes for creating, editing, and querying data for the myLeo app
- Implementation of Auth Guards for the security and authentication of REST routes
- Validation of incoming events / POST requests using validation pipelines and class-transformer
- Implementation of a state machine for controlling the logic and state of various processes
- Creation of unit tests and E2E tests with Supertest / Jest to ensure code quality and functionality
- Use of MS Teams, Miro, Jira, Docker, and other tools for team collaboration and project organization
- Processing and sending events for various notifications upon user interactions or IoT actions
- (Nats, BullMQ)
- Use of AWS Services (S3 Bucket) for storing files and generating temporary valid links to files
- Creation of documentation for the API and software architecture
- Implementation of a concept for digital signature of PDFs via terminal / tablet
- AparkadoBackend Development / ArchitectureLOGISTICS AND SUPPLY CHAINJune 2022 - February 2023 (9 months)Köln, Germany
- Responsibility for the integration of REST API routes for communication between frontend and backend
- with attention to high security (Guards), verification of all POST routes, performance, and scalability
- Planning and architecture of new features and development of efficient database schemas
- Implementation of all new feature requirements in the backend, such as user authentication with AUTH0,
database queries and aggregations with MongoDB for evaluating statistics, caching to reduce access times andserver costs- Ensuring code quality and functionality through unit/E2E tests and documentation
- Integration of a payment provider (Stripe) to realize a payment in the app
- Integration of other 3rd party APIs according to their authentication requirements and documentation
- Pair programming / code reviews
- Andreas Wolf SoftwareentwicklungFreelance Software DeveloperSOFTWARE PUBLISHINGMay 2022 - Today (4 years and 1 month)Marktrodach, GermanyCurrently self-employed as a freelance software developer. More detailed CV available upon request!
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Education
- Bachelor of ScienceHof University of Applied Sciences2018Bachelor of Science - BS, Mobile Computing
- University of Applied Sciences Entrance QualificationAdalbert-Raps-Schule Kulmbach2009Fachhochschulreife