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kennyhazzar

kennyhazzar

Backend / Fullstack Engineer designing maintainable services, APIs and product workflows. I work with TypeScript, Node.js, NestJS, PostgreSQL, Redis and React/Next.js, with a focus on architecture, queues, real-time systems and products that survive beyond the MVP.

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Stack

Language
TypeScriptJavaScriptNode.jsGo
Framework
NestJSFastifyNext.jsMantineMUITelegrafTelegram Web App
Libraries
ReactRedux ToolkitApollo Client
Data
PostgreSQLMySQLMongoDBMicrosoft SQL ServerRedis
Storage
S3MinIO
Infra
DockerDocker ComposeGitLab CI/CDBullMQ
Protocols
WebSocketGraphQLREST API
Architecture
CQRSClean ArchitectureDDD
Auth
CASLJWT
Testing
Jest
Tooling
Swagger / OpenAPITypeORMDrizzle ORMPinoPuppeteerHandlebars

Cases

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Nest REST Backend Template: the backend foundation I use to start new projects

A production-oriented NestJS backend template: Fastify, Drizzle ORM, PostgreSQL, CQRS, RBAC/CASL, gRPC auth service, JWT/cookies, S3 file storage, BullMQ, i18n, captcha, healthchecks, Docker and observability.

NestJSFastifyTypeScriptNode.jsPostgreSQLRedisDocker ComposeS3MinIOBullMQREST APISwagger / OpenAPIDrizzle ORMCQRSClean ArchitectureDDDCASLJWT
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Project Builder Platform: engineering projects, auctions and document workflows
Project Builder Platform: engineering projects, auctions and document workflows

A platform for engineering project management: Clean Architecture, CQRS, GraphQL API, role-based workflows, multi-round auctions, real-time chats, notifications, file storage and document signing chains.

Node.jsNestJSTypeScriptFastifyApollo ClientRedisDockerDocker ComposeGitLab CI/CDS3MinIOBullMQWebSocketGraphQLDDDCASLJWTHandlebarsDrizzle ORMCQRSClean ArchitectureReactNext.jsPostgreSQL
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Portfolio Platform: personal website, blog and admin panel
Portfolio Platform: personal website, blog and admin panel

A personal website that grew into a small CMS: Next.js frontend, NestJS backend, auth service, admin panel, Markdown content, files, comments, navigation, technologies and Docker infrastructure.

TypeScriptNestJSFastifyNext.jsReactRedisDockerDrizzle ORMCQRSJWT
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Latest posts

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Jul 28, 2026
How I use DDD and CQRS in backend projects
DDD and CQRS are useful not as folder structures, but as a way to keep business logic visible through commands, rules, states and events.
Jul 28, 2026
Node.js Event Loop: how I think about it in practice
The event loop matters not only for interviews, but for understanding latency, blocking code, queues, timers, Promise microtasks and backend behavior under load.
Jul 28, 2026
Event loop lag in Node.js: why an API is slow even when the database is fine
Event loop lag helps explain latency that is not caused by a slow database: CPU-bound code, heavy serialization, sync APIs and long microtask chains.

About

Software Engineer Designing maintainable backend systems with a focus on architecture, scalability and long-term reliability. Telegram • LinkedIn • GitHub • Habr Career • Steam Overview Backend engineer focused on…

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Contacts

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