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Large Java systems carry years of decisions, and new features wait while the team works out what is safe to change.

Hire Java Developers

Hire Java Developers for Enterprise Systems, Microservices & Payment Platforms

Java engineers who have worked on long-lived Spring codebases, can trace a request across services, and plan JDK upgrades with care.

  • Spring Boot, Hibernate and current JDK releases
  • Experience with Kafka, relational databases and the JVM
  • Follows your branching, review and release rules
  • You interview before any contract is signed
  • DaysTo a shortlist
  • MonthlyContract terms
  • YoursCode and IP

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Teams That Build With SyntecHire

References available on request.

What You Can Build With Java

Enterprise Back Ends

Order, billing and account systems with transactions, audit trails and role-based access.

Tech Stack

  • Java
  • Spring Boot
  • Hibernate
  • PostgreSQL

Outcome

Core records stay consistent even when several systems write to them.

Java is developed in the open through the OpenJDK project, where new features are proposed and tracked as JDK Enhancement Proposals.
OpenJDK project documentation

Technical Expertise Our Java Developers Bring

Collections, concurrency, memory and how the garbage collector behaves under load.

  • Java 21
  • Concurrency
  • JVM Tuning

Dependency injection, configuration, security and data access used the way the framework intends.

  • Spring Boot
  • Spring Security
  • Spring Data

Entity mapping, query tuning and migrations, with plain SQL where the ORM gets in the way.

  • Hibernate
  • JPA
  • Flyway

Producers and consumers designed for ordering, retries and messages that arrive twice.

  • Kafka
  • RabbitMQ
  • JMS

Contracts written down first, versioned carefully and checked against the implementation.

  • REST
  • gRPC
  • OpenAPI

Unit tests for logic and integration tests that run against real databases and brokers in containers.

  • JUnit 5
  • Mockito
  • Testcontainers

Repeatable builds, dependency management and pipelines that fail early.

  • Maven
  • Gradle
  • Jenkins

Metrics, traces and structured logs that show where time is spent in a request.

  • Micrometer
  • OpenTelemetry
  • Grafana

How Java Has Evolved

  1. 1996

    JDK 1.0First release

    Sun Microsystems released the first public Java Development Kit.

  2. 2004

    J2SE 5.0Generics

    Generics, annotations, enums and the enhanced for loop.

  3. 2014

    Java 8Lambdas

    Lambda expressions, the Streams API and a new date and time API.

  4. 2021

    Java 17LTS

    Long-term support release that finalised sealed classes.

  5. 2023

    Java 21Virtual threads

    Long-term support release with virtual threads and pattern matching for switch.

  6. 2025

    Java 25LTS

    Long-term support release that finalised scoped values.

When Java Is The Right Choice

Choose Java when

  • The system will live for many yearsJava places a high value on backward compatibility, so old code keeps running on new releases.
  • Transactions and consistency matterThe ecosystem around databases, messaging and transactions is mature.
  • Many teams share one platformStatic typing and settled conventions keep a large codebase navigable.
  • You already run on the JVMNew services fit your existing monitoring, libraries and skills.

Consider something else when

  • You need a quick prototypeJava asks for more setup. Python or Node.js reach a demo sooner.
  • Memory is tight or start-up must be instantA standard JVM takes time and memory to warm up. Go or Rust may suit small functions better.
  • The job is a short scriptA scripting language is simpler for glue code and one-off tasks.
  • Your team works mainly in TypeScriptStaying in one language across the stack may be easier to staff.

Why CTOs Choose Us

Screening uses an existing Java project, because reading code is most of the work on a mature system.

You interview the developer and review their code before any contract.

The developer follows your branching model, review rules and release calendar, in your repository.

A developer is assigned to one client, so knowledge of your system stays with them.

Month-to-month engagement with no exit fee, and a replacement if the fit is wrong.

How Your Developer Joins The Team

  1. 1
    Step 1

    Discovery

    A call about your stack, team and the work ahead.

  2. 2
    Step 2

    Matching

    A shortlist of people who have done similar work.

  3. 3
    Step 3

    Onboarding

    Access, environment setup and a first small task.

  4. 4
    Step 4

    Shipping

    Regular pull requests inside your review process.

AI In Delivery

Where coding assistants help, and where a person decides.

  • Used for speed

    Boilerplate, test scaffolding and first drafts of documentation.

  • Always reviewed

    Every change is read and approved by an engineer before it merges.

  • Never given secrets

    Credentials and client data stay out of prompts. Your policy on AI tools applies.

Security And IP

What we enforce on every engagement.

  • IP assignment

    All work product is assigned to you in the contract.

  • NDA first

    Signed before anyone sees your code.

  • Least privilege

    Access limited to what the task needs.

  • Clean exit

    Access revoked and handover documented when work ends.

Java Developer Pricing Tiers

  • Early career

    Entry

    On request

    • Works on defined tasks
    • Pairs with a senior reviewer
    • Suited to well-scoped backlog items
    Ask For Rates
  • Mid level

    Experienced

    On request

    • Owns features end to end
    • Reviews others' code
    • Suited to most product teams
    Ask For Rates
  • Senior

    Expert

    On request

    • Leads architecture decisions
    • Mentors the team
    • Suited to complex or legacy systems
    Ask For Rates

Rates depend on seniority, stack and team size. We quote a fixed monthly figure per developer.

What Is Included In The Rate

SyntecHire dedicated developerTypical freelancer
Screening and onboardingIncludedYour time
Replacement if the fit is wrongIncludedStart again
Continuity and handover notesIncludedVaries
IP assignment and NDAIn the contractVaries
AvailabilityFull time on your productShared across clients

Is A Dedicated Developer The Right Fit?

Five quick questions.

  1. 1Is the work expected to run for three months or longer?

  2. 2Do you have someone who can set priorities each week?

  3. 3Is there an existing codebase or a clear specification?

  4. 4Do you want the developer inside your own tools and reviews?

  5. 5Would losing context between contractors hurt the project?

0 of 5 answered. Answer every question to see the result.

Related Insights

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Java Hiring Questions

Have More Questions?

Each candidate reviews and extends an existing Java codebase, then explains the changes in a live technical interview. We also check how clearly they communicate.

Yes. Spring Boot is the most common framework in the roles we fill. If you use something else, such as Quarkus or Micronaut, tell us and we shortlist for it.

Yes. Many production systems still run on older releases. The developer can maintain the application as it is and propose an upgrade path when you are ready.

Some do. Kotlin runs on the JVM and works alongside Java code. Tell us if it is part of your stack.

You own all code and IP. An NDA is signed before code access, and commits go to your repositories.

We replace them. The engagement is month to month and there is no exit fee if you decide to stop.