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.

Support Management System (Machine Learning)

January 1, 2024 - January 1, 2025

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.

Backend/Integration Engineer (Platform Migration)

January 1, 2023 - Present

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.

Transport Management Microservice Technical Lead

January 1, 2023 - January 1, 2025

Served as technical lead for a microservice-based transport management system automating order transfers from e-commerce platforms to shipping carriers. Led architecture and integrations with carrier APIs (e.g., DHL and Schenker), including shipment booking, label generation, and pickup scheduling. Implemented backend in Python using Flask and Celery for async processing, orchestrated services with Docker Compose, and ensured reliable operations under high transaction volumes.

Payment & Settlement Reconciliation Integration Engineer

January 1, 2019 - January 1, 2025

Designed and developed an integration service that retrieves transaction and settlement data from payment service providers via API and matches transactions to corresponding invoices in ERP systems. Integrated providers including Klarna and ERP platforms such as Fortnox and Visma, automating reconciliation between PSP payouts, e-commerce orders, and accounting records. Implemented in Python using Flask and Celery with microservices and Docker Compose for reliable high-volume processing.

Product & Inventory Synchronization Engineer

January 1, 2019 - January 1, 2025

Designed and developed an integration engine to synchronize product data, pricing, and inventory levels between e-commerce platforms and external business systems. Built a Python and Flask microservice architecture with Docker Compose and Celery to process large volumes reliably. Continued maintaining and extending the platform as business and integration requirements evolved.

WooCommerce Plugin Developer (Fortnox Integration)

January 1, 2016 - January 1, 2024

Developed and continuously enhanced a WooCommerce plugin integrating e-commerce with Fortnox via its REST API. Automated synchronization of orders, products, and customer data, and maintained compatibility with evolving versions of WooCommerce and Fortnox. Built in PHP to support automation of accounting and administrative workflows for e-commerce merchants.

Software Engineer (Monolith to Microservices Migration)

January 1, 2015 - January 1, 2016

Led gradual migration of a monolithic application to a microservices-based architecture using Python, Flask, and Docker. Designed HTTP-based inter-service communication and introduced containerization to improve deployment, service isolation, scalability, maintainability, and system performance.

Technical Lead | Back-end & Integration Engineer

January 1, 2015 - Present

Led and developed multiple production integration services connecting e-commerce, ERP, payments, and logistics providers. Built and operated microservice architectures using Python (Flask/FastAPI), asynchronous workers, and containerized deployments. Designed REST API standards, implemented OAuth-based security for integrations, and ensured reliable processing under high transaction volumes. Strengthened financial data alignment through transaction and settlement reconciliation workflows between payment providers and ERP accounting records, and improved automation across operational processes.