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Achievement: Pair ExtraordinaireAchievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLOAchievement: Arctic Code Vault Contributor

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mannkostir/README.md

Artem Gabatov - Backend Engineer

Node.js / NestJS, TypeScript. I build event-driven systems: microservices on Kafka, streaming pipelines and domain models that hold their invariants under DDD.

I turn the patterns I keep needing in production into small, tested, documented libraries:

Library What it does
nestjs-kafka Decorator-driven Kafka consumers and producer for NestJS on librdkafka: dead-letter and retry topics, Avro via Schema Registry, topic namespacing npm
typeorm-unit-of-work Unit of Work for TypeORM: ambient transactions, aggregate domain events before and after commit, transactional outbox npm
flink-projections Stateful Flink operators that project entity change streams into search documents, with explicit deletes and savepoint-safe state Maven Central
nest-result Typed errors for NestJS: the compiler proves every error is mapped to an HTTP response npm
domain-integrity Static analysis that fails CI when an aggregate's lifecycle drifts from its declared intent npm

Stack: TypeScript · Node.js · NestJS · PostgreSQL · Kafka · Flink · Elasticsearch / OpenSearch · Redis · Kubernetes · Java

📫 Telegram @agabatov · mannkostir@gmail.com

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  1. nestjs-kafka nestjs-kafka Public

    Decorator-driven Kafka consumers and producer for NestJS on librdkafka, with a consumer group per handler, fail, ignore and dead-letter error policies, topic namespacing, and Avro via Schema Registry.

    TypeScript

  2. domain-integrity domain-integrity Public

    Checks that a TypeScript domain's aggregate lifecycles match their declared intent.

    TypeScript

  3. typeorm-unit-of-work typeorm-unit-of-work Public

    Unit of Work for TypeORM: ambient transactions and aggregate domain events published before and after commit

    TypeScript

  4. nest-result nest-result Public

    Compiler-checked, exhaustive mapping of neverthrow Results to HTTP responses for NestJS, plus transactions that roll back on Err.

    TypeScript

  5. flink-projections flink-projections Public

    Stateful Flink operators that project entity change streams into documents, with explicit deletes, stable uids and state names for savepoints, per-stream state TTL, and Kafka and Elasticsearch adap…

    Java