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Björn Kremer

@bjoernkremer

Senior Software Engineer at DeepL SE who owned a cloud-native notification platform serving millions of users.

At DeepL SE, I owned the architecture and development of a cloud-native, event-driven notification platform serving millions of users. It used Kafka and Cassandra to support near real-time communication between Sales and Support teams and end users, with resilient deployment on Kubernetes.

I also designed and developed a payment backend for DeepL’s Android and iOS apps, and owned integrations and data synchronization with Salesforce, Zendesk, and Chargebee. Earlier, I developed smart metering software at BTC AG and worked on PatOrg at Brügmann Software GmbH; my focus is distributed backend systems and software architecture.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

DeepL SE

Oct 2021 - Oct 2026 (5 years)

Owned end-to-end architecture and development of a highly scalable, cloud-native, event-driven notification platform serving millions of users. Led design and development of a cloud-native payment backend and modernized a distributed usage metering and quota management platform.

C# .NET Kafka REST JSON RPC gRPC Protobuf Kubernetes Docker PostgreSQL Cassandra Clickhouse Databricks Grafana Prometheus ASP.NET Core Clean Architecture CI CD

Software Engineer

BTC AG

Mar 2020 - Oct 2021 (1 year 7 months)

Developed and enhanced a production Smart Metering backend for provisioning, managing, and collecting meter data from smart meters. Extended a big-data backend for meter data collection and developed event-driven communication mechanisms for data exchange between distributed components.

C# .NET SQL REST Windows Workflow Foundation MSMQ WCF

Master's Thesis

ROSEN Group

Sep 2019 - Mar 2020 (6 months)

Developed and analyzed software engineering solutions in an industrial environment. Developed a workflow-based software system to orchestrate internal IT systems.

C# .NET Windows Workflow Foundation