Java is a general-purpose programming language that runs on the Java Virtual Machine, used for back-end systems that must run reliably for years.
15+ years of team experience · Salesforce Select Partner · Delaware and Sydney
Java development for systems that have to keep running.
We build, take over and upgrade Java applications, from Spring Boot APIs to batch jobs and Kafka services, and we supply Java engineers who join your team.
See the upgrade paths
- 15+Years of team experience
- 3Ways to engage: project, team or extension
- 60 minFree Java review, with a written plan
- 5.0/5Client satisfaction (CSAT)
Proven Success With
5.0/5 CSAT
New to Java?
What is Java?
Long-term support (LTS) releases get years of updates. Java 25, released in September 2025, is the newest LTS.
The JDK comes from Oracle and from OpenJDK builds such as Eclipse Temurin, on different license terms, which matters when you plan an upgrade.
Where you are starting from
Where are you with Java?
What state is your Java application in today?
- Path 01Not built yet
A new Java build
You need a new service, API or back end and want it on a current Java LTS.
- Design agreed before code
- Spring Boot on Java 21 or 25
- Tests and pipeline from the first sprint
- Path 02Built, but the team left
Taking over an application
A Java system runs in production and the people who built it have moved on.
- Code and architecture review first
- Build, deploy and run steps written down
- Fixes ranked by risk
- Path 03Running on an old Java
Upgrading or modernizing
It works, but sits on Java 8, 11 or 17, an old Spring version or Oracle JDK terms you want to leave.
- Dependencies and license checked
- Upgrade done in tested steps
- javax to jakarta where needed
A Java application on a supported release, with tests, documentation and a team that can run it
What we do
What do our Java development services include?
One team covers the application end to end, from the first design to support after release.
New Java applications
01Spring Boot services and back ends built from a written design.
REST APIs and microservices
02Versioned, documented APIs and services that scale with load.
Java upgrades
03Java 8, 11 or 17 moved to 21 or 25, including javax to jakarta.
Performance and stability
04Slow endpoints, memory leaks and JVM settings found and fixed.
Testing
05JUnit 5, Mockito and Testcontainers suites that run in your pipeline.
Support and maintenance
06Fixes, patches and dependency updates on a monthly plan.
Salesforce integration
07Java services connected to Salesforce through its REST, Bulk and Pub/Sub APIs.
Team extension
08Java engineers who work in your repos, rituals and tools.
Technology
The Java stack we work with
From the JDK at the bottom to the tests that guard each release.
- Java 21 LTS
- Java 25 LTS
- Eclipse Temurin
- Oracle JDK
- Spring Boot
- Jakarta EE
- Quarkus
- Hibernate (JPA)
- Apache Kafka
- Spring Batch
- Maven
- Gradle
- JUnit 5
- Mockito
- Testcontainers
Java upgrades
Which Java version should we upgrade to?
Oracle JDK 17 Premier Support ended in September 2026, and free Oracle JDK 21 updates under the NFTC license ended the same month.
TodayJava 8, 11 or 17 on Oracle JDK
- Java 25 LTS
Move to the newest LTS
Java 25, released September 2025, is the newest LTS. Eclipse Temurin 25 is supported to September 2031.
Best when you are moving several versions anyway.
- Java 21 LTS
Move to Java 21
A shorter step from 11 or 17. Eclipse Temurin 21 is supported to December 2029; later Oracle JDK 21 updates need a paid subscription in production.
Best when a framework or vendor library is not ready for 25.
- OpenJDK build
Change the JDK as well
Move from Oracle JDK to an OpenJDK build such as Eclipse Temurin, and handle javax to jakarta changes in the same pass.
Best when Oracle license cost is the trigger.
How we work with you
How can we work together on Java?
Three ways to engage. Each starts with a written proposal agreed before work begins.
- Fixed-scope project
A defined Java deliverable, built and handed over.
- We direct the work against agreed milestones
- Priced per milestone in the proposal
- Working code, tests and documentation
- Fits a new build, an upgrade or a rescue
- Dedicated team
A Java team that runs your product with you.
- Our lead runs delivery, you set priorities
- Billed on a monthly plan
- Engineers, a lead and testing as one unit
- Fits ongoing product work without an in-house team
- Team extension
Java engineers added to the team you already run.
- Your managers direct the day-to-day work
- Billed monthly for each engineer
- Vetted engineers; we handle employment and replacement
- Fits a backlog bigger than your current team
How it runs
How does a Java engagement start?
Five steps from the first call to delivery.
- Brief
- Free 60-minute review of your application
- Goals, constraints and access agreed under NDA
- Match or design
- Engineers matched and interviewed by you
- Or a scope and milestone plan written
- Start
- Accounts, repos and environments set up
- Codebase walkthrough and a first task
- Build and review
- Sprints with code review on every change
- Tests and a demo each sprint
- Hand over or continue
- Runbooks and handover sessions
- Or a monthly plan for support
Cost and timing
What it costs and how long it takes
The review is free
A 60-minute architecture review of your Java application setup, with a written plan you keep.
A fixed-scope proposal first
Before any work starts you get a written proposal: a fixed-scope project with milestones, or a monthly plan. You approve it, or you do not.
Timing follows scope
How long it takes depends on what is in scope. The proposal states the milestones, so you see the timeline before you commit.
Client stories
Client work we have delivered
Real engagements, described by industry. Each story covers the starting position, what we built and how we delivered it, end to end.
Commercial & Business ServicesA Subscription Estimator and Technical Library for Fire Protection ProfessionalsA Next.js web application for a fire protection business: a searchable technical library and estimator with role-based access, manufacturer filtering, PDF output and subscriptions, with AI product identification in development.Next.js · Custom web application · Authentication and roles · SubscriptionsRead the story 
Communications, Media & TechnologyA Bilingual Knowledge Base That Answers Callers During a Major International EventA bilingual English and Japanese knowledge base for contact centre operators at a major international event: live answer suggestions, cross-language search with translated embeddings, operator content management and missing-question tracking.Custom AI · Vector search · Translated embeddings · Large language modelsRead the story 
EducationOne Tutoring Calendar Across Salesforce and TeachWorksSalesforce development for an Australian tutoring provider: a custom session calendar, two-way TeachWorks appointment sync, attendance and completion mapping, and session notes into after-session reports.Salesforce Platform · Lightning Web Components · Apex · TeachWorks APIRead the story Client reviews
What clients say about working with our architects
See how teams describe working with SynconAI, from first scope to production delivery.
Salesforce Select Partner30+ Salesforce certificationsDelivery from Delaware & Sydney, worldwide
Simply Outstanding
“SynconAI Consulting are Simply the Best in the Business When it comes to Salesforce implementation and AI-powered solutions, SynconAI are in a league of their own. Their expertise, dedication, and ability to deliver results that truly move the needle sets them apart from every other consulting partner we've worked with. What they achieved with our Sales Cloud, Service Cloud, and custom Agentforce agent has completely transformed how we operate streamlining our pipelines and our customer service, and automating tasks that used to consume hours of our team's time. They don't just implement technology they transform businesses. If you want the best, you work with their team.”
Sales CloudService CloudAgentforce
Jack BennettConsumer Goods & Retail · United States
“I had a very urgent deadline for our project reporting to be delivered and needed to build the module, dashboard and output reports in Salesforce. SynconAI were very responsive - they met with me online, responded to my emails quickly and took calls - whatever was needed to progress the work quickly. We are thrilled with the outcome and will continue to work with SynconAI in the future to continue to build our Salesforce capability and platform.”
Sales CloudService CloudNonprofit Cloud
Salesforce Managed ServicesAustraliaSalesforce Verified
“The team at SynconAI were fantastic, and promptly delivered on each project. They were able to guide us through every stage and made sure we were satisfied with the outcomes on multiple scopes of work.”
Sales CloudSlackFlowAgentforceMuleSoft
ManufacturingAustraliaSalesforce Verified
“They have been great and helping us transform out business by bringing what I conceptualize to life. Great at translating process/workflow needs into a solution. Been a pleasure work with and they're a critical part of our team and will be instrumental into bringing about my vision.”
Sales CloudFinancial Services CloudArchitectureAI
Financial ServicesUnited StatesSalesforce Verified
“Working with SynconAI was a seamless and highly professional experience from start to finish. They took the time to deeply understand our business processes before designing and implementing a Salesforce solution tailored specifically to our operational needs. The team demonstrated strong technical expertise across Salesforce configuration, automation, integrations, reporting, and user experience design.”
SalesforceExperience CloudCustom DevelopmentAutomationReporting
Salesforce ImplementationSalesforce Verified
Frequently asked questions
Java development, answered.
Straight answers about what we build, Java upgrades, how engagements work and how our engineers join your team.
High-volume REST and microservice back ends, payment, banking and insurance systems, ERP integrations, batch and ETL jobs and Kafka streaming services, mostly on Spring Boot.
Oracle JDK 17 Premier Support ended in September 2026 and free Oracle JDK 21 updates ended the same month. Moving to Java 21 or 25, on Oracle or an OpenJDK build, keeps security updates coming.
Three ways: a fixed-scope project with milestones, a dedicated team on a monthly plan, or engineers who join your team. Each starts with a written proposal agreed before work begins.
Yes. They work in your repos, tools and sprint rituals, and your managers direct the day-to-day work. We handle employment, and the replacement terms are written into the contract.
Each engineer passes a technical interview on Java and Spring, a practical coding exercise and a review by a senior engineer. You interview them and decide before anyone starts.
Yes. Java works with the Salesforce REST, SOAP, Bulk API 2.0 and Pub/Sub APIs. Salesforce provides the Web Services Connector for SOAP and supports Java samples for the Pub/Sub API.
We work from hubs in Delaware and Sydney and deliver remotely worldwide on your business hours. The agreed overlap with your team is written into the contract.
Java and Oracle are registered trademarks of Oracle and/or its affiliates. Spring and Spring Boot are trademarks of Broadcom Inc. Eclipse Temurin, Jakarta EE, Quarkus, Apache Kafka and Salesforce are trademarks of their owners. SynconAI is an independent consulting firm and is not affiliated with or endorsed by Oracle.
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