Explore practical insights, tutorials, and strategies on real-time stream processing, event-driven decisioning, and low-code data tools.https://nussknacker.io/https://nussknacker.io/blog/decision-models-nussknacker-jev/https://nussknacker.io/blog/decision-models-nussknacker-jev/Decision models like TypeSafe Jev and Cloudflare Clef return typed answers with probabilities. See how to add one to a Nussknacker scenario and what you gain.Thu, 08 Oct 2026 16:21:12 GMThttps://nussknacker.io/blog/what-is-new-in-nu-september-2026/https://nussknacker.io/blog/what-is-new-in-nu-september-2026/Nussknacker in September 2026: Change Data Capture for tables, nodes with named outputs, a WebSocket Server source and live data for Request-Response.Wed, 30 Sep 2026 13:57:17 GMThttps://nussknacker.io/blog/what-is-new-in-nu-august-2026/https://nussknacker.io/blog/what-is-new-in-nu-august-2026/Nussknacker in August 2026: deployment targets, the World Map component, improved enum support, improved Compare versions and more.Mon, 31 Aug 2026 11:32:21 GMThttps://nussknacker.io/blog/turn-your-flink-udfs-and-ptfs-into-low-code-components/https://nussknacker.io/blog/turn-your-flink-udfs-and-ptfs-into-low-code-components/Turn Apache Flink UDFs and PTFs into low-code components in Nussknacker — auto-discovered, typed, and usable without SQL.Wed, 24 Jun 2026 15:04:57 GMThttps://nussknacker.io/blog/real-time-kafka-ai-agents-mcp/https://nussknacker.io/blog/real-time-kafka-ai-agents-mcp/Serve real-time Kafka data to AI agents as an MCP tool: aggregate events in Flink, store the state, and expose it to agents — built visually in Nussknacker.Sun, 21 Jun 2026 20:14:13 GMThttps://nussknacker.io/blog/typed-structured-output-from-llms-in-nussknacker-no-more-parsing-json-by-hand/https://nussknacker.io/blog/typed-structured-output-from-llms-in-nussknacker-no-more-parsing-json-by-hand/Turn LLM output into typed fields in Nussknacker: define a JSON Schema once and get autocomplete, design-time validation, and null-safe parsing.Thu, 18 Jun 2026 15:18:51 GMThttps://nussknacker.io/blog/real-time-decision-logic-needs-its-spreadsheet-moment/https://nussknacker.io/blog/real-time-decision-logic-needs-its-spreadsheet-moment/Spreadsheets let business experts build their own models and see each change at once. Real-time decision logic still lacks that: why, and what it needs.Wed, 17 Jun 2026 12:01:39 GMThttps://nussknacker.io/blog/turn-rest-api-into-a-kafka-event-stream-no-code-required/https://nussknacker.io/blog/turn-rest-api-into-a-kafka-event-stream-no-code-required/Bridge any REST API to Apache Kafka without code. Visually turn the OpenSky flight tracking pull API into a live Kafka event stream with Nussknacker.Fri, 17 Apr 2026 14:00:47 GMThttps://nussknacker.io/blog/complex-event-processing-with-apache-flink-visual-cep-with-nussknacker/https://nussknacker.io/blog/complex-event-processing-with-apache-flink-visual-cep-with-nussknacker/Learn how to build visual Complex Event Processing scenarios with Apache Flink MATCH_RECOGNIZE and Nussknacker using real-time ADS-B flight data.Wed, 15 Apr 2026 14:19:23 GMThttps://nussknacker.io/blog/building-iceberg-lakehouse-with-aws-glue/https://nussknacker.io/blog/building-iceberg-lakehouse-with-aws-glue/Build a medallion lakehouse on S3 with Apache Iceberg and the AWS Glue catalog in Nussknacker Cloud, moving sales data from the Bronze to the Gold layer.Thu, 16 Oct 2025 15:50:04 GMThttps://nussknacker.io/blog/understanding-event-time-in-nussknacker/https://nussknacker.io/blog/understanding-event-time-in-nussknacker/Learn why Event time is crucial in stream processing and how Nussknacker leverages it for reliable stateful computations.Tue, 30 Sep 2025 16:44:49 GMThttps://nussknacker.io/blog/generation-augmented-retrieval-gar-for-product-recommendation/https://nussknacker.io/blog/generation-augmented-retrieval-gar-for-product-recommendation/The LLM answers first and a vector store matches the answer to your catalogue. This inverts RAG, avoids prompt size limits and recommends only real products.Wed, 10 Sep 2025 10:07:04 GMThttps://nussknacker.io/blog/why-streaming-sql-is-not-the-right-tool-for-authoring-event-driven-stream-based-algorithms/https://nussknacker.io/blog/why-streaming-sql-is-not-the-right-tool-for-authoring-event-driven-stream-based-algorithms/Streaming SQL suits ETL and dashboards but breaks down on state, time, branching and external calls in event-driven apps. Flink SQL is the reference point.Thu, 17 Jul 2025 10:56:56 GMThttps://nussknacker.io/blog/integrate-azure-databricks-mlflow-for-machine-learning-model-management-and-inference/https://nussknacker.io/blog/integrate-azure-databricks-mlflow-for-machine-learning-model-management-and-inference/Connect Nussknacker Cloud to Azure Databricks managed MLflow. Registered models then appear as enricher components for inference in a fraud detection scenario.Fri, 25 Apr 2025 08:30:03 GMThttps://nussknacker.io/blog/how-to-train-and-register-ml-models-in-azure-databricks/https://nussknacker.io/blog/how-to-train-and-register-ml-models-in-azure-databricks/See how to train and register ML models in Azure Databricks and deploy them in Nussknacker Cloud for credit card fraud detection.Fri, 25 Apr 2025 08:21:47 GMThttps://nussknacker.io/blog/next-generation-real-time-rating-systems-in-memory-state-management/https://nussknacker.io/blog/next-generation-real-time-rating-systems-in-memory-state-management/Synchronous architectures struggle when rating must keep up with live usage. This post shows how stateful stream processing in Nussknacker handles it.Fri, 11 Apr 2025 16:12:48 GMThttps://nussknacker.io/blog/real-time-rating-system-a-one-manday-prototype/https://nussknacker.io/blog/real-time-rating-system-a-one-manday-prototype/I built a real-time rating prototype in Nussknacker in one day. Flink provided the session windows, the customer balance state and recovery from failure.Fri, 11 Apr 2025 16:10:43 GMThttps://nussknacker.io/blog/real-time-iot-data-processing-with-low-code/https://nussknacker.io/blog/real-time-iot-data-processing-with-low-code/Nussknacker Cloud has MQTT source and sink nodes. This guide creates an MQTT broker, configures the integration and runs a scenario on machine data.Fri, 04 Apr 2025 11:52:30 GMThttps://nussknacker.io/blog/real-time-transaction-fraud-detection/https://nussknacker.io/blog/real-time-transaction-fraud-detection/Transaction fraud has to be caught while the payment happens. This demo scenario in Nussknacker flags suspicious transactions and sends alerts to Kafka.Thu, 20 Mar 2025 10:37:40 GMThttps://nussknacker.io/blog/telecoms-credit-scoring-system-with-ml-inference/https://nussknacker.io/blog/telecoms-credit-scoring-system-with-ml-inference/Mobile carriers score credit risk for handset installments. Data scientists deploy MLflow models in Nussknacker, and business analysts change the credit rules.Tue, 21 Jan 2025 14:24:52 GMThttps://nussknacker.io/blog/streaming-sql-alternative/https://nussknacker.io/blog/streaming-sql-alternative/Streaming SQL makes you treat each event as a row in a table. This post takes a streaming SQL example from RisingWave and builds the same logic in Nussknacker.Tue, 14 Jan 2025 14:32:50 GMThttps://nussknacker.io/blog/real-time-ml-driven-recommendations-use-case/https://nussknacker.io/blog/real-time-ml-driven-recommendations-use-case/Snowplow tracks clicks in a Shopify store, Nussknacker scores them with an ML model in real time and sends the recommendations back to the shop.Thu, 19 Dec 2024 08:28:31 GMThttps://nussknacker.io/blog/nussknacker-iceberg-example/https://nussknacker.io/blog/nussknacker-iceberg-example/Use Nussknacker with Apache Iceberg via Flink catalogs for data ingestion, transformation, enrichment, and low-code business logic.Fri, 27 Sep 2024 12:54:52 GMThttps://nussknacker.io/blog/ml-models-inference-in-fraud-detection/https://nussknacker.io/blog/ml-models-inference-in-fraud-detection/Train a fraud detection model, track it in MLflow, call it from a Nussknacker scenario, then improve the results with A/B tests and model ensembles.Fri, 06 Sep 2024 11:47:19 GMThttps://nussknacker.io/blog/next-best-action-recommendation-management-simplified/https://nussknacker.io/blog/next-best-action-recommendation-management-simplified/A Polish telecom runs next best action recommendations in Nussknacker's request-response mode. A Dunder Mifflin-style example shows how to read and edit them.Mon, 12 Aug 2024 14:28:18 GMThttps://nussknacker.io/blog/exactly-once-event-processing/https://nussknacker.io/blog/exactly-once-event-processing/Nussknacker delivers messages exactly once end to end through the Kafka sink, using Flink. Side effects such as enrichments may still repeat after a failure.Thu, 25 Jul 2024 10:59:20 GMThttps://nussknacker.io/blog/batch-processing-on-apache-flink/https://nussknacker.io/blog/batch-processing-on-apache-flink/Nussknacker is adding a batch mode on Apache Flink. This early preview ingests transactions, deploys with parameters and keeps business logic in one place.Wed, 19 Jun 2024 13:37:15 GMThttps://nussknacker.io/blog/data-processing-modes-streaming-batch-request-response/https://nussknacker.io/blog/data-processing-modes-streaming-batch-request-response/Understand the difference between streaming, batch, and request-response data processing — and when to use each mode in real-time systems.Fri, 14 Jun 2024 12:26:39 GMThttps://nussknacker.io/blog/1-15-release-highlights/https://nussknacker.io/blog/1-15-release-highlights/Nussknacker 1.15 adds a batch processing mode built on Flink's Table API and Catalogs, support for Flink 1.18, node search in the editor and a new theme.Tue, 11 Jun 2024 09:33:29 GMThttps://nussknacker.io/blog/upcoming-webinar-real-time-data-processing-for-the-people/https://nussknacker.io/blog/upcoming-webinar-real-time-data-processing-for-the-people/In this webinar recording, Zbigniew Małachowski lists the features real-time data tools need beyond drag and drop, for fraud detection, streaming ML or IoT.Thu, 23 May 2024 10:20:17 GMThttps://nussknacker.io/blog/how-to-use-nussknacker-together-with-kafka-schema-registry/https://nussknacker.io/blog/how-to-use-nussknacker-together-with-kafka-schema-registry/This IoT example reads Kafka topics with Avro schemas from Schema Registry, flags anomalies in Nussknacker and shows what happens when a schema evolves.Thu, 16 May 2024 10:29:16 GMThttps://nussknacker.io/blog/sms-artificially-inflated-traffic/https://nussknacker.io/blog/sms-artificially-inflated-traffic/Fraudsters register an MVNO and pump SMS traffic through other operators. A Nussknacker scenario flags senders of 10,000+ messages to a few numbers in 8 hours.Mon, 15 Apr 2024 14:19:08 GMThttps://nussknacker.io/blog/a-guide-to-openapi-components/https://nussknacker.io/blog/a-guide-to-openapi-components/Nussknacker reads OpenAPI definitions and turns REST services into enricher components for scenarios. This guide shows it on premises and in Nussknacker Cloud.Mon, 15 Apr 2024 10:38:50 GMThttps://nussknacker.io/blog/introduction-to-telecomunications-fraud-detection/https://nussknacker.io/blog/introduction-to-telecomunications-fraud-detection/Learn how real-time tools help detect telecom fraud, from spoofing to false capacity and how Nussknacker fits into modern fraud management.Thu, 28 Mar 2024 11:04:24 GMThttps://nussknacker.io/blog/introduction-to-integrating-google-firebase-with-kafka-connect-and-nussknacker/https://nussknacker.io/blog/introduction-to-integrating-google-firebase-with-kafka-connect-and-nussknacker/Discover how to connect Firebase with Kafka Connect and Nussknacker to enable real-time analytics, event-driven workflows and data processingMon, 16 Oct 2023 11:21:55 GMThttps://nussknacker.io/blog/how-to-build-a-bridge-between-it-and-the-business-teams/https://nussknacker.io/blog/how-to-build-a-bridge-between-it-and-the-business-teams/Fast-changing data sources, formats, schemas and processing models keep business teams waiting on IT. This post describes a bridge application between the two.Thu, 28 Sep 2023 12:10:51 GMThttps://nussknacker.io/blog/ms-azure-active-directory-integration/https://nussknacker.io/blog/ms-azure-active-directory-integration/Set up single sign-on to Nussknacker with Azure Active Directory, now Microsoft Entra ID: app registration, a secret, API permissions, roles and OIDC settings.Wed, 16 Aug 2023 13:03:52 GMThttps://nussknacker.io/blog/nu-chapter-for-touk/https://nussknacker.io/blog/nu-chapter-for-touk/Respect for the inimitable software engineers of TouK who have joined Snowflake, or who will continue working with us on Nussknacker.Mon, 08 May 2023 13:13:34 GMThttps://nussknacker.io/blog/combine-streaming-and-historical-data-for-real-time-decisioning/https://nussknacker.io/blog/combine-streaming-and-historical-data-for-real-time-decisioning/React to customer behaviour in Confluent Cloud using customer profiles from Snowflake. Nussknacker lets non-developers combine both in one scenario.Mon, 08 May 2023 08:58:10 GMThttps://nussknacker.io/blog/what-is-wrong-with-low-code-tools-in-streaming/https://nussknacker.io/blog/what-is-wrong-with-low-code-tools-in-streaming/Real-time actions-on-data apps such as ML on streams are rarely simple enough for drag and drop. This post names the features low-code streaming tools miss.Tue, 21 Mar 2023 15:49:59 GMThttps://nussknacker.io/blog/translating-business-case-into-streaming-concepts/https://nussknacker.io/blog/translating-business-case-into-streaming-concepts/Streaming data is not enough in most business cases. You need to enrich the events with additional information to perform meaningful business actions.Thu, 02 Mar 2023 07:52:32 GMThttps://nussknacker.io/blog/take-nussknacker-to-the-next-level-with-configuration-only/https://nussknacker.io/blog/take-nussknacker-to-the-next-level-with-configuration-only/Nussknacker can be adapted to your domain without code. This post shows environment labels, comment validation, component settings and OpenAPI filters.Tue, 14 Feb 2023 08:32:39 GMThttps://nussknacker.io/blog/how-to-handle-quickly-evolving-elasticsearch-documents-in-nussknacker/https://nussknacker.io/blog/how-to-handle-quickly-evolving-elasticsearch-documents-in-nussknacker/Learn how Nussknacker handles evolving Elasticsearch schemas and enables writing rules on flexible, dynamic data structures.Tue, 07 Feb 2023 12:26:27 GMThttps://nussknacker.io/blog/speed-up-your-openbanking-decision-scenarios-with-nussknacker/https://nussknacker.io/blog/speed-up-your-openbanking-decision-scenarios-with-nussknacker/Check how Nussknacker uses open banking standards to help domain experts turn data into fast, actionable decisions with low-code tools.Mon, 30 Jan 2023 07:18:30 GMThttps://nussknacker.io/blog/stream-designer-and-nussknacker-designer-comparison/https://nussknacker.io/blog/stream-designer-and-nussknacker-designer-comparison/We compare Confluent Stream Designer with Nussknacker Designer on target users, deployment, connectors, data enrichment, testability and observability.Mon, 23 Jan 2023 10:29:01 GMThttps://nussknacker.io/blog/real-time-sentiment-analysis-using-nussknacker-kafka-and-spel/https://nussknacker.io/blog/real-time-sentiment-analysis-using-nussknacker-kafka-and-spel/Explore how to use Nussknacker, Kafka, and SpEL to build real-time sentiment analysis with schema-based topics and dynamic decision logic.Wed, 30 Nov 2022 09:33:54 GMThttps://nussknacker.io/blog/low-code-for-business-rules-are-we-there-yet/https://nussknacker.io/blog/low-code-for-business-rules-are-we-there-yet/Low-code tools now cover analytics, web apps and data pipelines. Defining business rules is still hard for domain experts, and this post looks at why.Mon, 28 Nov 2022 09:39:03 GMThttps://nussknacker.io/blog/building-a-credit-rating-verification-service-with-nusskancker/https://nussknacker.io/blog/building-a-credit-rating-verification-service-with-nusskancker/Discover how visual low-code tools like Nussknacker make complex credit rating algorithms easier to build, understand, and maintain.Thu, 17 Nov 2022 09:12:05 GMThttps://nussknacker.io/blog/is-sql-enough-to-democratise-stream-processing/https://nussknacker.io/blog/is-sql-enough-to-democratise-stream-processing/Running streaming SQL isn't enough for real-time apps. Learn why tools like Nussknacker are key beyond simple ETL in stream processing.Thu, 20 Oct 2022 13:18:50 GMThttps://nussknacker.io/blog/nussknacker-1-5/https://nussknacker.io/blog/nussknacker-1-5/Nussknacker 1.5 brings single Kafka source and sink components for Avro and JSON Schema topics, improved Filter and Choice nodes and a full outer join.Tue, 16 Aug 2022 10:54:01 GMThttps://nussknacker.io/blog/ml-models-inference-non-trivial-processing-algorithms-built-and-deployed-in-an-easy-way/https://nussknacker.io/blog/ml-models-inference-non-trivial-processing-algorithms-built-and-deployed-in-an-easy-way/See how Nussknacker lets you deploy ML models and build advanced decision logic with transformations, enrichments, and real-time data flows.Fri, 24 Jun 2022 09:43:15 GMThttps://nussknacker.io/blog/stretching-old-solutions-to-fit-new-problems-doesnt-work-a-genealogy-of-nussknacker/https://nussknacker.io/blog/stretching-old-solutions-to-fit-new-problems-doesnt-work-a-genealogy-of-nussknacker/Stream processing grew from Hadoop batch jobs through Kafka and Flink, yet it still left business teams behind. This is the story of why we built Nussknacker.Wed, 01 Jun 2022 08:49:00 GMThttps://nussknacker.io/blog/nu-has-many-flavours-which-one-is-for-you/https://nussknacker.io/blog/nu-has-many-flavours-which-one-is-for-you/One Nussknacker Designer can deploy scenarios to different engines: Flink for stateful streaming, or Streaming-Lite when a use case does not need Flink.Fri, 22 Apr 2022 09:08:23 GMThttps://nussknacker.io/blog/running-low-code-scenarios-with-graalvm-native-image/https://nussknacker.io/blog/running-low-code-scenarios-with-graalvm-native-image/We compiled Nussknacker scenarios to a GraalVM native image. The container shrank to 111 MB and used under 10 MB of memory, against 433 MiB on an untuned JVM.Mon, 14 Mar 2022 10:14:35 GMThttps://nussknacker.io/blog/nussknacker-compared-with-similar-open-source-tools/https://nussknacker.io/blog/nussknacker-compared-with-similar-open-source-tools/We compare Nussknacker with NiFi, Node-RED, BPMN engines and Drools by logic style, business versus integration logic, scalability and fit for the domain.Tue, 08 Feb 2022 10:44:26 GMThttps://nussknacker.io/blog/apache-ignite-in-nussknacker-environment-lessons-learned/https://nussknacker.io/blog/apache-ignite-in-nussknacker-environment-lessons-learned/See how Apache Ignite with Nussknacker enables fast, distributed caching and data enrichment for real-time streaming use cases.Tue, 18 Jan 2022 10:13:25 GMThttps://nussknacker.io/blog/event-streams-always-need-flink-or-not-really/https://nussknacker.io/blog/event-streams-always-need-flink-or-not-really/Flink is powerful but complex. Discover how Nussknacker delivers stream processing value without the operational burden of heavy engines like Flink.Tue, 21 Dec 2021 14:04:24 GMThttps://nussknacker.io/blog/nussknacker-1-1/https://nussknacker.io/blog/nussknacker-1-1/Released in December 2021, Nussknacker 1.1 brings support for Flink 1.14, an integration with Apache Ignite and simpler configuration.Fri, 10 Dec 2021 14:26:52 GMT