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Custom enterprise apps

Java & Spring

The workhorse of enterprise back ends: banks, insurers, telecoms and retailers run on it.

  • Language and application framework
  • Typical project: 4–9 months
  • Open source (OpenJDK; Spring by Broadcom)
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Overview

Java has run enterprise back ends for almost 30 years. Spring Boot is the standard framework for building services and APIs quickly, with security, data access and messaging built in.

The talent pool is huge and the ecosystem very mature. Many core systems in banking, insurance and telecoms are Java, so modernisation work (monolith to microservices, old Java to current versions) is common.

Names you'll meet

  • Java
  • Spring Boot
  • Apache Kafka
  • Kubernetes
  • Oracle Database

What's inside

  1. 1

    Spring Boot

    Services and APIs with sensible defaults.

  2. 2

    Spring Security

    Authentication and authorisation.

  3. 3

    Data & messaging

    Database access, Kafka and message queues.

  4. 4

    Build & runtime

    Maven or Gradle builds, running in containers.

Is it right for you?

Best for

  • Core systems with high volumes and long lifespans
  • Banks, insurers, telcos and large retailers
  • Teams that need a deep hiring pool

Think twice if…

  • The app is small and short-lived; lighter stacks are quicker
  • You plan a big-bang rewrite of an old monolith; stage it instead

Typical projects

  1. Microservices platform4–9 months
  2. Monolith modernisation, piece by piece5–14 months
  3. Java version upgrade4–16 weeks

Typical ranges, not quotes. Scope, data and team size move them most.

Roles you'll hire

  • Java / Spring developer
  • Solution architect
  • SRE / DevOps engineer
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Questions to ask a vendor

  1. 1How will you break up the monolith without a big-bang rewrite?
  2. 2Which Java long-term-support version will you target?
  3. 3How do you handle observability and performance testing?
  4. 4How do you design and version APIs?

Find Java & Spring partners

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