What is TechInPractice?
A free, community-driven educational platform where senior software engineers share decades of real-world domain knowledge — so developers, architects, and students can understand not just how to write code, but what that code is actually doing inside real companies.
The Problem Nobody Talks About
Every year, thousands of developers enter the industry knowing React, Java, Python, SQL — and struggle for months because they have no idea what a policy lifecycle is, how claims adjudication works, why a bank reconciliation fails, or what happens when an EMR record is updated.
This knowledge does not appear in any computer science curriculum. It is not in any YouTube course. It lives only in the heads of experienced professionals — and it takes years to accumulate through osmosis on the job.
TechInPractice is the shortcut. We extract that knowledge from senior practitioners with 15–25 years of experience and make it available to everyone, for free, in a structured and searchable format.
You can write a microservice — but do you understand why insurance policies have endorsements?
You can design a database — but do you know why banking systems have shadow ledgers?
You can build an API — but do you know what happens in a healthcare pre-authorization flow?
You can optimize a query — but do you understand supply chain ETA recalculation logic?
What TechInPractice Is
Domain Knowledge First
Every topic starts with the business — what problem does this system solve, who uses it, and why does it exist. Technical implementation comes after business understanding.
Real Production Systems
All content is based on systems that run in actual companies. Not toy examples. Not simplified demos. Real architectures, real data flows, real failure modes.
Senior Developer Perspectives
Content is shaped by engineers with 15–25 years of experience across multiple industries. Their battle-tested insights and hard-won lessons are what you will find here — not textbook theory.
Living Knowledge Base
Industries evolve. Systems change. New patterns emerge. Our community continuously updates and adds content so what you learn reflects the current state of the industry.
Structured Learning Paths
Each domain follows a consistent 9-module structure: System Overview → Business Flow → Architecture → APIs → Database Design → Production Issues → Debugging → KT Notes → Interview Prep.
Community-Driven
Practitioners from across industries share their experiences, correct outdated information, and add new domains. Knowledge improves continuously through collective contribution.
Who This Is For
TechInPractice is useful for anyone who builds, designs, or works with software systems professionally — at any stage of their career.
Students & Fresh Graduates
College teaches you algorithms and syntax. Companies need you to understand their business. TechInPractice fills exactly that gap — so you walk into your first job ready to contribute from day one, not after 6 months of confusion.
- ✓Understand how real corporate systems work
- ✓Learn domain terminology used in interviews
- ✓Get KT (knowledge transfer) before you even join
Software Developers
Writing code is only 20% of the job. The other 80% is understanding what to build, why it exists, how it connects to other systems, and what breaks in production. TechInPractice gives you the other 80%.
- ✓Deep-dive into systems you work on daily
- ✓Understand end-to-end business flows
- ✓Learn production debugging patterns from real incidents
Solution Architects
Great architecture requires deep domain understanding. You cannot design a resilient claims processing system if you do not know how claims adjudication works. TechInPractice is your cross-domain knowledge base.
- ✓Cross-industry architecture patterns
- ✓Understand data models driven by business rules
- ✓Learn how legacy and modern systems coexist
Domain Switchers
Moving from e-commerce to insurance? From banking to healthcare? Every industry has years of domain-specific knowledge baked into its systems. TechInPractice accelerates your ramp-up from months to days.
- ✓Structured domain onboarding guides
- ✓Terminology glossaries per industry
- ✓Understand why things are built the way they are
Interview Candidates
Top companies do not just ask LeetCode problems. They ask: "Have you worked in insurance? What is a policy lifecycle?" TechInPractice prepares you for the domain knowledge questions that actually filter candidates.
- ✓Domain-specific interview question banks
- ✓System design from a business perspective
- ✓Real scenario walkthroughs used in senior interviews
Business Analysts & PMs
Understanding how systems are technically implemented makes you a better BA or PM. TechInPractice bridges the gap between business requirements and engineering reality.
- ✓Understand technical constraints from a business lens
- ✓Learn how your requirements translate to system design
- ✓Speak the language of both business and engineering
11 Industries · 50+ Domains · Growing Every Month
We cover the industries where the majority of enterprise software is built. Content is added continuously as community contributors share their expertise.
Financial Services
Insurance · Banking · Payments · Trading · FinTech
E-commerce & Retail
Shopping Platforms · Inventory · Order Management · Supply Chain
Healthcare & MedTech
EMR/EHR · Hospital Management · Pharmacy · Telemedicine
Logistics & Supply Chain
Fleet Management · Warehouse · Last-Mile Delivery
Telecom & Media
Billing Systems · Network Management · Streaming Platforms
Government & Public Sector
Tax Systems · Citizen Services · Digital Identity
EdTech & Learning
LMS · Assessment · Certification Systems
Real Estate & PropTech
Property Management · Mortgage · Title Systems
Travel & Hospitality
Booking Engines · PMS · Loyalty Programs
Manufacturing & IoT
MES · ERP · Predictive Maintenance
Energy & Utilities
Smart Grid · Metering · Asset Management
How the Learning Structure Works
Choose an Industry
Start with an industry that interests you or is relevant to your current job — Financial Services, Healthcare, E-commerce, and more.
Select a Domain
Within each industry, choose a domain — for example, Insurance within Financial Services, or E-prescriptions within Healthcare.
Pick a Sub-Domain
Narrow down further — within Insurance, choose Health Insurance, Life Insurance, Auto, or Property.
Explore the Systems
See all the production systems in that sub-domain — Claims Management, Policy Administration, Provider Network, Billing, and more.
Learn in 9 Structured Modules
Each system teaches: System Overview → Business Flow → Architecture Diagram → APIs & Data → Database Design → Production Issues → Debugging Scenarios → KT Notes → Interview Questions.
A Community That Learns & Shares Together
TechInPractice is not a static knowledge base. It is a living community where practitioners at all levels — from fresh graduates to principal engineers — share their experiences, correct outdated patterns, and add new domain content.
Industries change. Regulations evolve. New systems emerge. Our community ensures the knowledge you learn today reflects what is actually happening in production right now — not what was true five years ago.
11
Industries Covered
50+
Domains & Sub-Domains
9
Modules per System
100%
Free Forever
Educational Disclaimer
TechInPractice is a purely educational platform. All content — including system descriptions, architecture diagrams, business flows, database designs, API structures, and code examples — is created for learning purposes only.
Content represents generalised patterns observed across the industry and does not represent the specific implementation of any single company, client, or proprietary system. No confidential, proprietary, or trade-secret information belonging to any organisation is intentionally shared.
Knowledge shared by community contributors reflects their personal professional experience and general industry knowledge. Contributors are responsible for ensuring they do not disclose information that is confidential to their employers.
This platform is open to anyone who wants to learn — students, developers, architects, analysts, product managers, and anyone curious about how real-world software systems work. No registration is required. All content is free.
The platform does not offer certifications, guarantees of employment, or endorsement of any specific technology, vendor, or organisation.
Ready to Start Learning?
No sign-up. No paywall. Just the domain knowledge that makes you a better engineer.