Samuel Šteiner - Backend, Platform, AI & DevSecOps

Samuel Šteiner

Available for new projects

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Years of experience

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Showcase Project

E-commerce Platform

Monorepo with two apps - e-commerce store with Elasticsearch search and a local AI assistant.

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Services

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Whether it's a startup MVP, a full-scale platform, or a complex backend - I'm here to ship it right.

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Selected Projects

PersonalLevelUp StoreProduction-grade e-commerce monorepo - Symfony backend, Elasticsearch search, Stripe payments, RabbitMQ async processing, GitOps on Kubernetes, full CI/CD + supply chain security pipeline, and a companion AI assistant app. Hexagonal Architecture, DDD, CQRS, PHPStan level 10.

PHPSymfonyTypeScriptPostgreSQLElasticsearchRedisRabbitMQMercureKubernetesHelmArgoCDTerraformAnsibleTraefikJenkinsVaultStripeSentry

Project detail Live site GitHub

PersonalLevelUp Store AI AssistantAI assistant app from the LevelUp Store monorepo - answers product questions using a RAG pipeline (ChromaDB + Ollama), streams responses token-by-token via Redis pub/sub + SSE, and processes requests through a dedicated RabbitMQ queue so the store stays unaffected under AI load.

PythonFastAPIOllamaChromaDBRedisRabbitMQReactTypeScriptTailwind CSSPostgreSQLDockerKubernetesHelmArgoCDSentry

Project detail GitHub

Company ProjectDIGI GOFull-stack rewrite of a sport TV subscription platform from legacy Nette to Laravel + Vue.js - dual payment gateway integration (TatraPay, GlobalPayments), subscription package ordering, and user profile management.

PHPLaravelVue.jsTailwind CSSMariaDBDockerTatraPayGlobalPayments

Project detail Live site

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