Open-Source Ecommerce · nashtech-garage

yas

YAS is an open-source e-commerce microservices reference implementation written in Java and Spring Boot, designed as a learning platform for building scalable, distributed systems. It demonstrates real-world patterns including service orchestration, API gateways, event streaming, and observability in a multi-service architecture.

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Source: GitHub — github.com/nashtech-garage/yas

GitHub stars

725

Forks

Java

Primary language

MIT

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	nashtech-garage/yas
Owner	nashtech-garage
Primary language	Java
License	MIT — OSI-approved
Stars	2k
Forks	725
Open issues	143
Latest release	yas-configuration-0.4.0 (2024-11-11)
Last updated	2026-06-12
Source	https://github.com/nashtech-garage/yas

What yas is

YAS comprises ~16+ Spring Boot microservices (product, cart, order, payment, inventory, search, etc.) orchestrated via Kafka, with Next.js frontends, Keycloak for identity, Elasticsearch for search, and observability via OpenTelemetry, Prometheus, Loki, and Grafana. Deployable locally via Docker Compose or to Kubernetes via provided manifests.

Quickstart

Get the yas source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/nashtech-garage/yas.git2cd yas3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

Educational reference for microservices patterns

Demonstrates service decomposition, inter-service communication (Kafka), API gateway design, and observability in a real e-commerce domain—useful for teams learning distributed system design.

Prototype or POC for e-commerce platforms

Provides a working skeleton with core e-commerce features (products, cart, orders, payments, inventory), authentication, and admin interfaces—can be extended as a starting point for custom shop projects.

DevOps and Kubernetes training

Includes production-grade Kubernetes manifests, Docker Compose configurations, GitHub Actions CI/CD pipelines, and observability stacks—valuable for demonstrating containerization and deployment strategies.

Implementation considerations

16 GB RAM minimum for full local Docker Compose setup; reduced-feature core-only option available. Plan resource allocation before onboarding teams.
Java 25 and Spring Boot 4.0 are bleeding-edge; verify organizational Java version support and library compatibility before adopting.
Kafka, Elasticsearch, Keycloak, PostgreSQL, and observability stack (Loki, Tempo, Prometheus, Grafana) require operational maturity; ensure DevOps team is equipped for multi-component troubleshooting.
143 open issues at snapshot; assess backlog for critical gaps or breaking changes before committing to a version.
Kubernetes deployment manifests provided; however, production ingress, resource limits, RBAC, and network policies require customization per environment.

When to avoid it — and what to weigh

Seeking a production-ready e-commerce platform — YAS is explicitly a pet/sample project. It lacks production hardening, payment PCI compliance assurance, security audit results, and SLA guarantees. Not suitable as-is for live customer-facing shops.
Needing extensive customization with vendor support — No commercial support, SLA, or security response team is documented. Community-driven; maintenance depends on contributor availability. Requires in-house expertise to debug and extend.
Building a simple, monolithic e-commerce site — The microservices overhead (16+ services, message brokers, orchestration) is overkill for low-complexity shops. Better suited for teams requiring horizontal scalability and independent service deployment.
Strict security/compliance requirements (PCI, HIPAA, SOC2) — No audit trail, formal security review, or compliance certifications documented. Payment handling is a stub/example. Unsuitable for regulated or high-sensitivity environments without substantial internal security work.

License & commercial use

MIT License. Permissive open-source license allowing commercial use, modification, and distribution, provided original copyright and license notice are retained. No restrictions on proprietary derivatives.

MIT is a permissive OSI-approved license that permits commercial use. However, YAS is labeled a 'pet project' and sample application. Derivatives are permitted under MIT, but users bear all risk for security, compliance, and support. No warranty or liability protection is provided. Suitable for internal R&D, prototypes, or as a code reference; not recommended as a shipping product without significant security and compliance review.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Adequate
License clarity	Clear
Deployment complexity	High
DEV.co fit	Good
Assessment confidence	High

Security considerations

YAS is a reference/educational project, not security-hardened. Considerations: Keycloak handles identity, but auth token scope and endpoint protection require review. No documented secrets management (keys, DB passwords appear in plaintext compose files in examples). No indication of input validation, rate limiting, or OWASP TOP 10 mitigations. Payment service is stubbed; real payment integration requires PCI DSS review. GitHub Actions CI includes gitleaks scanning (good), but no mention of SAST, dependency scanning, or container image scanning. For production use, conduct thorough security audit and implement additional controls.

Alternatives to consider

Medusa (Node.js/TypeScript e-commerce platform)

Modern open-source e-commerce with strong ecosystem, plugin architecture, and headless design. Better for rapid e-commerce development; less emphasis on microservices learning.

nopCommerce (C#/.NET e-commerce)

Production-ready e-commerce platform with extensive features, plugin ecosystem, and vendor support. Suitable for teams seeking an out-of-the-box solution rather than a learning reference.

AsyncAPI / Event-driven Architecture samples (language-agnostic)

If the goal is learning event-driven microservices patterns without e-commerce specificity, pure architecture examples may offer less domain-specific noise and faster iteration.

Software development agency

Build on yas with DEV.co software developers

YAS provides a complete, working example of service decomposition, event-driven communication, and cloud-native deployment. Ideal for engineering teams learning distributed systems design. Fork the repository, run Docker Compose locally, and extend services to match your platform needs.

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yas FAQ

Can I use YAS as a foundation for a commercial shop?

Technically yes (MIT license), but not recommended. YAS is a sample/pet project, not production-hardened. Payment handling, security, compliance (PCI, fraud), and operational readiness are not addressed. Use as a code reference and prototype; plan substantial security, testing, and compliance work before launch.

What's the learning curve to extend YAS?

Moderate to high. You need familiarity with Java/Spring Boot, microservices concepts (Kafka, service discovery), Docker, Kubernetes, and observability tools. New users should expect 2–4 weeks to understand the codebase and confidently modify services.

Is YAS suitable for small teams or solo developers?

No. The infrastructure footprint (16 services, Kafka, Elasticsearch, K8s, observability) requires DevOps and distributed systems expertise. Better for organizations training microservices teams or building reference implementations. Solo developers or small teams should consider simpler monolithic starters.

How do I deploy YAS to production?

Kubernetes manifests are provided in /k8s/deploy. You must customize ingress, resource limits, RBAC, secrets management, and observability for your cloud platform. No all-in-one production deployment script is provided. Requires experienced Kubernetes operators.

Custom software development services

Need help beyond evaluating yas? DEV.co is a software development agency offering software development services and web development for teams of every size. Our software developers and web developers build custom software, web applications, APIs, and open-source ecommerce integrations — and maintain them long-term.

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