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The Ultimate Developer Prerequisites Checklist for Any New Project, New Role, or New Domain

 

✅ MASTER PREREQUISITES FOR ANY SOFTWARE DEVELOPER BEFORE LEARNING A NEW DOMAIN

(The Ultimate Developer Checklist – Must Read Before Starting Any Project or Domain)

⭐ INTRODUCTION

When a developer enters a new domain (banking, payments, SaaS, ERP, ecommerce) or a new project/company, 90% of their success depends on understanding the right prerequisites.

This guide gives the exact checklist top developers follow to gain mastery fast and become the “go-to” person in any team.

🚀 1. TECHNICAL PREREQUISITES

Before learning any domain, a developer must be clear in these areas:

1.1 Core Programming (Java Example)

Must be comfortable with:

  • OOP

  • Collections

  • Streams

  • Exceptions

  • Multithreading basics

  • Design patterns

  • API development (REST)

1.2 Backend Framework Mastery

Ex: Spring Boot
You must know:

  • Controllers

  • Services

  • Repositories

  • AOP

  • JWT/security

  • Schedulers

  • Configurations (YAML/properties)

1.3 Databases

You must understand:

  • SQL queries

  • Joins

  • Indexing

  • Transactions (ACID)

  • Aggregate functions

  • Query optimization basics

For NoSQL:

  • Key-value & document concepts

  • TTL, partitioning, replication

1.4 Messaging & Asynchronous Systems

Common in all domains:

  • Kafka

  • RabbitMQ/ActiveMQ

  • Topic vs queue

  • Offsets

  • Consumer groups

1.5 Git & CI/CD

Basic knowledge:

  • Branching

  • Merge

  • PR standards

  • CI pipeline

  • Deployment pipeline

1.6 Logging & Monitoring

Must know:

  • Log patterns

  • Correlation IDs

  • Splunk/Kibana/Grafana basics

  • Debugging logs effectively

1.7 Cloud Basics

Even minimal:

  • AWS/GCP/Azure basics

  • VPC

  • Load balancer

  • S3

  • RDS

  • IAM

  • ECS/EKS

You don’t need expert level — just conceptual clarity.

⚙️ 2. SYSTEM THINKING PREREQUISITES

Before learning any domain, sharpen these:

2.1 Understanding End-to-End Flow

You should be able to read a flow like:

Client → API Gateway → Service → DB → Kafka → External System

2.2 Trace a Request

You must know how to trace:

  • The incoming HTTP request

  • The business logic

  • DB queries

  • Kafka calls

  • External API calls

  • Error logging

This skill separates juniors from seniors.

2.3 Modular Thinking

You should be able to break systems into modules:

  • Auth

  • Billing

  • Notification

  • Reporting

  • User management

Every domain follows these patterns.

🧠 3. DOMAIN LEARNING PREREQUISITES

Before touching any domain (banking, ERP, payments, PG, e-commerce), understand these principles.

3.1 Business First, Code Second

You should know:

  • What problem the system solves

  • Who uses it

  • What value it provides

Without this, you can never own the domain.

3.2 Understand Terminology

Every domain has its own terms.

Example:
Banking: MT940, RTGS, Nostro.
E-commerce: SKU, Cart, Fulfillment.
SaaS: Tenant, Admin, Billing Cycle.

You must be good at learning new vocabulary.

3.3 Understand Data Flow

Every domain has:

  • Input data

  • Processing logic

  • Output data

Your job is to understand how data flows between systems.

3.4 Understand Integrations

Every domain integrates with:

  • External APIs

  • Payment systems

  • SMS/Email

  • Notification engines

  • Reporting tools

Understanding integration patterns is key.

3.5 Understand Compliance & Rules

Every domain has strict rules:

  • Banking → KYC, AML

  • Healthcare → HIPAA

  • SaaS → Data privacy, audit logs

  • E-commerce → Tax, refund policies

You must know compliance boundaries.

👥 4. TEAM / PROCESS PREREQUISITES

4.1 Agile Fundamentals

You should know:

  • Stories

  • Sprints

  • Grooming

  • Retro

  • Velocity

  • Estimation with story points

4.2 Communication Templates

Be strong in:

  • Daily updates

  • KT questions

  • Asking precise queries

  • Sharing analysis documents

  • RCA reports

4.3 Documentation Skills

You must write:

  • Flow diagrams

  • Sequence diagrams

  • Problem statements

  • Solution proposals

  • API contracts

Good docs = instant respect.

🔥 5. MINDSET PREREQUISITES

The most important part.

5.1 Curiosity Mindset

Ask:

  • "Why does this process exist?"

  • "Why is this system designed like this?"

  • "Why does this error come?"

5.2 Ownership Mindset

Act like the system is yours:

  • Be proactive

  • Suggest improvements

  • Catch flaws before others

5.3 Slow First, Fast Later

Don’t rush. First understand deeply → then code lightning fast.

5.4 Be Resourceful

Before asking:

  • Check logs

  • Search code

  • Test in local

  • Check DB

  • See configs

  • Try different inputs

📌 6. DELIVERABLES PREREQUISITES

For every new domain/project, be ready to produce:

  1. Architecture diagram

  2. Request trace

  3. Module map

  4. DB table map

  5. Risk list

  6. First 3 tasks plan

These make you look senior instantly.

🏁 CONCLUSION

If a developer follows this prerequisite checklist, mastering any domain becomes 10 times easier.

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