.NET Mastery Program - Enrollment Now Open

Trusted by 2,000+ .NET & Cloud Developers

Engineer .NET Systems Like the Architects Who Ship Them

F2BStack — practical .NET, cloud, and AI engineering, taught by a working architect.

No filler, no toy examples. Every course, session, and tutorial is built from production incidents and real migrations, so you learn what actually holds up at scale.

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4.9★Topmate rating

10,000+Engineers helped

Top 0.1%Ranked mentor

Rohan KumawatSenior Software Engineer · .NET Mentor

Shipping-focused tutorialsBattle-tested steps for APIs, AI copilots, and data pipelines.
Research-backed insightsWe connect product strategy with code so your roadmap stays aligned.
Community office hoursWeekly live reviews covering your blockers, PRs, and observability gaps.

Choose Your Path

Three ways to work with me, depending on how you like to learn.

Self-Paced

Bootcamp Course

Complete ASP.NET Core, SQL, Docker & AI — real projects, lifetime access.

View Course →1:1 Coaching

Mentorship Sessions

Career advice, interview prep, resume reviews, and architecture guidance — one focused call at a time.

Book a Session →Complete Program

Career Packages

Multi-session mentorship bundles for a full, guided transformation — from 30-hour coaching to architecture tracks.

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Guiding .NET Developers Through Modern Architecture

I'm passionate about helping .NET developers master modern architecture patterns and cloud-native development. Through comprehensive video tutorials, in-depth technical articles, and community engagement on YouTube and LinkedIn, I share battle-tested practices for building scalable, maintainable applications.

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Built for Builders Who Ship

F2BStack started as a set of internal runbooks. It has grown into a publication for engineers, tech leads, and indie builders who want to combine clean architecture with pragmatic delivery. We translate emerging announcements from Microsoft, AWS, and the open-source ecosystem into actionable steps that can be applied the same week.

Whether you manage legacy MVC apps, greenfield microservices, or real-time analytics workloads, you will find guidance that prioritizes traceability, cost awareness, and developer happiness.

What you'll gain

End-to-end checklists covering design, code, observability, and operations.
Architecture diagrams and IaC snippets you can adapt in minutes.
Playbooks for introducing AI safely into existing .NET estates.
Opinionated templates for PR hygiene, API versioning, and incident response.

Why Teams Trust F2BStack

2K+

Monthly readers following our modernization journeys.

Hands-on labs spanning APIs, infra-as-code, and AI copilots.

Industry playbooks for finance, retail, health, media, and SaaS.

Average time saved per sprint by using our ready-to-run assets.

.NET Problems We Solve Every Week

Legacy to Cloud

Lift-and-Evolve Playbooks

Practical guides for migrating Web Forms, WCF, and on-prem SQL workloads into Azure Container Apps or AWS ECS without breaking compliance.

Modernization scorecards to rank technical debt
Side-by-side code comparisons for EF6 → EF Core
Automation scripts for blue/green deployments

Cost & Reliability

FinOps for APIs

Benchmarks and calculators that show how caching, queuing, and autoscaling settings in .NET 8/10 reduce cloud spend while improving SLAs.

Ready-to-use Azure Monitor workbooks
Chaos experiments to validate retry policies
Checklists for right-sizing containers & SQL tiers

AI + .NET

Responsible Copilot Recipes

Reference implementations that blend Semantic Kernel, Azure OpenAI, and ASP.NET minimal APIs with governance, telemetry, and prompt safety tests.

Evaluation harness with unit + synthetic datasets
Playbooks for grounding models with Azure AI Search
Data retention guidance for regulated industries

Curated Learning Paths

Cloud Native

API Reliability Track

Six-part series covering DDD-aligned endpoints, background message pumps, chaos testing, and dashboards that alert on SLIs your exec team actually cares about.

Terraform & Bicep deployment bundles
Grafana + Azure Monitor dashboards
Incident drills with runbooks

Data & AI

Intelligent Apps Blueprint

Blend OpenAI, Azure AI Search, and ML.NET with guardrails, prompt testing, and vector DB hygiene so your copilots stay secure and explainable.

Prompt evaluation harness templates
Semantic caching strategies
Responsible AI scorecard checklist

Platform

Developer Experience Accelerator

Stand up golden paths for repos, monorepo automation, container builds, and progressive delivery so every merge is observable, signed, and auditable.

Re-usable GitHub Actions pipelines
Supply chain scanning integrations
Launch checklist with comms templates

In-Depth Technical Guides

.NET Core

Production-Ready .NET Core

Architect resilient web APIs with dependency injection, background services, health checks, and deployment tips tailored for enterprise workloads.

Microservices

.NET Microservices Blueprint

Break down monoliths into independently deployable services using Dapr, MassTransit, API gateways, and distributed tracing.

AI + .NET

AI with .NET & Azure OpenAI

Build intelligent apps using ML.NET, Semantic Kernel, vector search, and Azure OpenAI integrations for copilots and automation.

.NET 10

What's New in .NET 10

Unpack AOT boosts, minimal API filters, native container images, and SDK improvements that streamline cloud-native development.

SQL Server

SQL Server Performance Lab

Deep dive into columnstore indexes, temporal tables, Query Store, Extended Events, and automation for mission-critical databases.

APIs

REST & GraphQL Done Right

Design RESTful endpoints, federation-ready GraphQL schemas, API versioning, throttling, and zero-trust security patterns.

Azure

Azure for .NET Engineers

Leverage App Service, Container Apps, API Management, and Azure SQL to run .NET workloads with observability and cost controls.

AWS

AWS Cloud for .NET Teams

Run .NET services on ECS, Lambda, and Elastic Beanstalk, integrate with RDS SQL Server, and automate deployments with CDK.

Docker

Dockerizing .NET Solutions

Create multi-stage Dockerfiles, optimize image sizes, use Docker Compose for local microservices, and prepare for Kubernetes.

Field-Tested Resources & Toolkits

Audit-Ready Templates

Security review questionnaires, DPIA drafts, and vendor assessment summaries adapted for .NET SaaS teams selling into regulated regions.

Incident Postmortems

Blameless retro templates plus sample KQL/Grafana queries that show how we traced deadlocks, GC pressure, and cost spikes in production.

Product Briefs

Executive-friendly summaries explaining why specific .NET design decisions improve adoption, security posture, or customer retention.