Java development in Kolkata

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Java development

The default choice where a system has to run reliably for a decade and be maintained by whoever inherits it.

Enterprise backend

Chosen per project

Maintainable handover

Java is chosen for longevity. Strong typing catches errors at compile time, the tooling for large codebases is mature, and long-term support releases mean a system can stay on a supported runtime for years without disruptive migration.

Spring Boot has removed most of the configuration burden that gave enterprise Java its reputation, leaving the qualities that made it a sensible choice in the first place.

What we build with Java

Core business systems expected to run for many years

Financial and transactional systems where correctness dominates

Integration layers between several enterprise systems

Organisations with an existing Java estate and skills

Where it fits — and where it does not

Good fit when

Long service life and predictable support requirements

Strong typing and compile-time safety are valued

Heavy concurrent processing and transactional workloads

A team already fluent in the JVM ecosystem

Consider something else when

Small projects, where the ceremony outweighs the benefit

Rapid prototyping where iteration speed matters most

Very constrained hosting budgets — the JVM wants memory

Spring Boot service

A layered Java backend

The conventional layering, and the reason it survives: each layer can be tested and replaced without disturbing the ones around it.

REST controllers

HTTP concerns and request mapping only.

Service layer

Business logic and transaction boundaries.

Domain model

Entities and rules that outlive the framework.

Repositories

Data access, isolated behind interfaces.

Datasource

Connection pooling and migration management.

Observability

Metrics, health checks and structured logs.

How we work with Java

Spring Boot

Convention-driven configuration, so the codebase is about the domain rather than the framework.

Layered design

Controllers, services and repositories kept distinct, with the domain model at the centre.

Transactions

Boundaries defined explicitly, which is what keeps financial data consistent under concurrency.

Build and release

Maven or Gradle with reproducible builds and containerised deployment.

Our typical Java setup

Typical Java stack choices and what we use for each
ConcernWhat we use
RuntimeA current long-term support JDK release
FrameworkSpring Boot with Spring Data and Spring Security
DatabasePostgreSQL or an existing enterprise database
MigrationsFlyway or Liquibase, versioned alongside the code
TestingJUnit with Testcontainers for realistic integration tests
BuildMaven or Gradle, producing container images

Frequently asked questions

For long-lived business and financial systems, yes. Modern Java with Spring Boot is concise, and the long-term support model is a genuine advantage when a system has to stay in service for many years.

They are closely matched. The decision usually comes down to your existing infrastructure and skills — .NET if the organisation is Microsoft-centred, Java if it is not, or if the deployment target is Linux-first.

Yes, including older applications on legacy frameworks. We audit first and propose a route to a supported runtime rather than assuming a rewrite.

Services built with Java

Tell us what you are trying to build

Describe the problem in plain language and we will tell you what it would take to solve it — the approach, the moving parts and the sensible order to build them in. No obligation either way.

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