For experienced engineers

You're good.
Let's get you great.

simstack is the flight simulator for engineers.

You SSH directly onto a server, spin up a production system then start working through training scenarios based on real-world experiences. Tackle them using your own tools, and learn from others' approaches.

🚀 Real-world, complex scenarios

đŸ‘©â€đŸ’» No video tutorials, no handholding

📈 Large-scale, real-world systems

Try it now

"This is DOOM for software engineers"

Stijn Christiaens
Collibra.com co-founderStijn Christiaens

Actually Full-Stack Training

simstack covers the full engineering spectrum. Deepen your existing specialty, or branch out across domains.

Frontend

Build fast, responsive UIs under realistic constraints. Implement dashboards for real-time data, handle offline modes, and optimize global content delivery.

Example scenarios
  • Building offline-ready SPAs
  • Multi-platform or kiosk UIs
  • A/B testing front-end experiences

Backend & DevOps

Master microservices, CI/CD, infra as code, and high-scale architectures—just like Google SRE or early Amazon.

Example scenarios
  • Splitting a monolith into resilient services
  • Implementing zero-downtime blue/green deploys
  • Observability setups: logs, metrics, and tracing

ML & Data

Go beyond toy examples—learn to run real AI/ML in production, build robust data pipelines, and handle compliance at scale.

Example scenarios
  • Building feature stores and ML pipelines
  • Streaming ingestion with queue-based architectures
  • Continuous model evaluation and fine-tuning

Security

Bolster your end-to-end security skill set. Identify and fix vulnerabilities in code, infrastructure, or configuration before they escalate.

Example scenarios
  • Rotating secrets and credentials at scale
  • Implementing zero-trust network principles
  • Real-time security incident response

And More


Because simstack is a living, evolving environment, you can dive into specialized areas like HPC, IoT, serverless, or advanced concurrency—whatever the real-world scenario demands. Our challenges are continuously updated to reflect modern production-scale problems.

Develop All-Around Engineering Mastery

What makes an amazing engineer?

The best engineers get things done, no matter the problem or the environment.

They have deep fundamentals, are happy anywhere in the stack, and manage complex systems with ease.

How do I become one?

The only way to become one is to practice.

But most of the time, you're stuck working on one tiny part of a bigger problem.

And in your training time, you're working on tutorials, toys, or prescriptive labs. That's enough to learn a specific tool or how to solve a specific problem — but not enough to gain real mastery.

How can simstack help?

simstack is a flight simulator for engineers. It immerses you in real-world production scenarios in real-world production systems, at scale.

You're free to solve these problems with any approach or toolset. We teach you to act like an expert.

After each challenge, you'll see how other industry pros solve the same scenario. Think of it as peering over the shoulder of top engineers at Google SRE, early Amazon, or elite Stripe teams— you'll pick up patterns and insights you can't get from standard courses.

The result? You evolve into an engineer who can spot problems before they happen and tackle them across any layer of the stack.

How It Works

1. Pick Your Focus

DevOps? Data? MLOps? Combine modules to tailor your path, or go for true full-stack coverage.

2. Build & Iterate

Tackle complex challenges in, get holistic feedback, and refine your skills with each iteration.

3. Get Hired

Share your challenge outcomes with hiring partners. Demonstrate your 10x mastery and jump into a high-impact role.

Ready to Get Great?

Jump into simstack's immersive world, solve production-scale problems, and see how the best engineers do it—so you can become one yourself.

Try it now