Tomas Kircher
I’m a technical lead and backend/integration engineer with extensive experience designing, developing, and launching business-critical integrations across ERP systems, e-commerce platforms, payment providers, logistics…
About
I’m a technical lead and backend/integration engineer with extensive experience designing, developing, and launching business-critical integrations across ERP systems, e-commerce platforms, payment providers, logistics systems, and cloud services. I build reliable REST API ecosystems—often microservices-based—and I take ownership from architecture and implementation through deployment and production support.
I’m especially focused on payment flows, reconciliation, invoicing and accounting-aligned data integration, and high-volume automation. In recent work, I’ve also applied machine learning and LLM-based automation to support operations and improve classification workflows, while keeping services containerized and production-ready using AWS, Docker, and CI/CD best practices.
- 11 years' experience
- Joined September 2026
Industry experience
- Software & Internet
- Financial Services
- Retail
- Transportation & Logistics
Work experience· 9 roles
Designed and launched an integration service synchronizing invoice data from Fortnox to Google BigQuery for centralized storage, reporting, and large-scale financial analysis. Built with Python (Flask), REST APIs, Swagger documentation, and Celery for scheduled and asynchronous processing.
Designed, developed, and launched an internal support management system integrated with the Teamwork API. Automated ticket retrieval, classification, and processing; implemented ML-based categorization and integrated the ChatGPT API to automate support workflows and responses. Built with Python and Flask, and containerized with Docker for consistent deployments across development and production.
Led migration of a platform microservice architecture from Flask to FastAPI. Migrated REST endpoints, service interfaces, and shared components while preserving existing business-critical logistics workflows and Celery-based asynchronous processing. Standardized API architecture across services to improve maintainability, validation, and API documentation quality.
Education
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