Aron Grünwald

I started an internal speech-to-text MVP and owned its processing architecture through production at Flexperto. I designed the path from WebRTC audio capture through Silero voice activity detection and RabbitMQ to batched faster-whisper transcription on NVIDIA H100 hardware.

I used short audio segments and batching to increase transcription throughput. I compared word error rate on a 50-minute recording and observed the same WER as the baseline. The production pipeline processed batches; live transcription was a separate demonstration.

I also worked with local models and vector retrieval for meeting transcripts. For the wider platform, I designed OpenAPI interfaces and used UML data flows to trace service-level failures, including a lost-wakeup in expert-call routing.

I shared responsibility for NaroIQ’s distributed market-data architecture and independently designed and implemented its Raft-based scheduler. It replaced cron-based processing and coordinated ingestion across equities, foreign exchange and corporate actions.

With the Head of Engineering, I designed RabbitMQ topic routing with domain-specific queues and worker pools. The scheduler grouped requests by exchange and provider. State coordination and retry paths supported recovery after interrupted processing.

I documented the event flows in UML, built AWS infrastructure with Terraform and configured Grafana dashboards for processing status and costs per instrument. That made stalled work and provider costs easier to investigate.

I own the architecture, implementation and operations of a commerce platform connecting Shopware 6, Microsoft Dynamics 365 Business Central and a custom PIM. I work directly with the owner and content teams to turn pricing, catalogue and shipping requirements into software.

I built OData adapters, local pricing models and incremental ERP synchronization. Local price data avoids a live ERP lookup for each price query. I send orders asynchronously with retries and persisted processing status, and implement freight rules for products with different units, dimensions and delivery options.

I built the FastAPI and React PIM for more than 15,000 products. Bulk editing, AI-assisted grouping and image workflows let the content team work across the catalogue. I also manage infrastructure, monitoring, releases and production incidents.