Spring Boot is a Java framework for building services and APIs on the Spring framework.
Salesforce Select Partner · 15+ years of team experience · 20+ enterprise implementations
Spring Boot development for Java services the business depends on.
We build Spring Boot microservices, APIs and batch jobs, take over Spring codebases other teams wrote, and move Boot 2 and Boot 3 apps onto Boot 4 and a current JDK.
See how it works
- 15+Years of team experience
- 3Ways to engage: project, team or extension
- 60 minFree Spring Boot development review, with a written plan
- 5.0/5Client satisfaction (CSAT)
Proven Success With
5.0/5 CSAT
New to Spring Boot development?
What is Spring Boot development?
We build microservices, REST APIs, batch jobs and Kafka event services, and upgrade old Boot versions.
Work runs as a fixed-scope project, a dedicated team or Spring engineers who join your team.
Starting point
Where are you with Spring Boot?
What does your Spring Boot work look like today?
- Path 01Nothing built yet
A new Spring Boot build
You need new services or APIs, or a monolith split into smaller ones.
- Service boundaries and contracts agreed first
- Started on Boot 4 and a current LTS JDK
- Tests with Testcontainers from the first sprint
- Path 02We inherited services
Taking over existing Spring services
The team that built them has moved on and nobody wants to touch them.
- Code, dependency and security review
- Tests added around the riskiest paths
- A written report and a plan
- Path 03They are out of date
Upgrading or modernizing
Services run on Boot 2 or 3, or on an Oracle JDK that now needs a paid subscription.
- javax moved to jakarta
- Boot stepped up to 4.1
- JDK moved to a current LTS
Spring Boot services on supported versions that your team can change safely
What we do
What do our Spring Boot development services include?
Build, take over, upgrade and staff Spring work with one Java team.
Microservices and REST APIs
01Spring Boot services with clear contracts, security and tests.
Batch and ETL jobs
02Spring Batch jobs that load, transform and reconcile data on a schedule.
Kafka event services
03Producers and consumers that handle retries, ordering and failures.
Integration back ends
04Services and API gateways that connect ERP, CRM and partner systems.
Spring Boot upgrades
05Boot 2 and 3 moved to Boot 4, with javax moved to jakarta.
Performance and observability
06Slow services profiled, queries tuned and metrics added with Micrometer.
Salesforce integration
07Java services that exchange data with Salesforce over its APIs.
Spring team extension
08Spring engineers who join your team and work in your process.
Stack
The Spring Boot stack we work with
The Spring projects most enterprise services use, on a supported JDK.
- Spring Boot
- Spring Security
- Spring Cloud
- Spring Batch
- Spring Data JPA
- Hibernate
- Apache Kafka
- Java 21
- Java 25
- Jakarta EE
- Maven
- Gradle
- JUnit 5
- Mockito
- Testcontainers
- Micrometer
Upgrades
How do you upgrade to Spring Boot 4?
Spring Boot 3.5 open-source support ended on 30 June 2026, and 4.0 open-source support ends on 31 December 2026. Boot 4 needs Java 17 or later, Spring Framework 7 and Jakarta EE 11.
TodaySpring Boot 2.x or 3.x on an older JDK
- Spring Boot 3.5.x
Reach the latest 3.5 first
Boot 2 apps move javax to jakarta and Java 17. Then every app moves to the latest 3.5 release and clears deprecations, as Spring advises.
A stepping stone: Boot 3.5 open-source support ended on 30 June 2026.
- Spring Boot 4.1
Move to Boot 4
Upgrade to Spring Framework 7 and Jakarta EE 11, and update libraries that changed.
Boot 4.1 is current. Boot 4.0 open-source support ends on 31 December 2026.
- Java 21 or 25
Update the JDK
Move to a current LTS JDK, and from Oracle JDK to an OpenJDK build such as Eclipse Temurin where licensing calls for it.
Free Oracle JDK 21 updates ended in September 2026. Temurin supports 21 to December 2029.
Engagement
How can you work with our Spring Boot engineers?
Three ways to engage. Each one is agreed in a written proposal before work starts.
- Fixed-scope project
We deliver a defined set of services or an upgrade.
- SynconAI directs the work to agreed milestones
- Billed by milestone, as set out in the proposal
- Working services, tests and runbooks
- Fits an upgrade, a new service or a monolith split
- Dedicated team
A Spring team that works only on your platform.
- You set priorities, our lead runs the team
- Billed monthly for the team
- Engineers, a lead and testing as needed
- Fits a platform with a steady stream of work
- Team extension
Spring engineers who join your team.
- Your managers direct the day-to-day work
- Billed monthly for each engineer
- Vetted engineers, with employment and replacement handled by us
- Fits teams with a working process that need more hands
Process
How does a Spring Boot engagement start?
Five steps from the first call to working services.
- Brief
- Call about your services and goals
- Repository access or a written scope
- Match or design
- Engineers matched to your stack
- Plan and proposal in writing
- Start
- NDA, access and environments set up
- Architecture walkthrough and a first task
- Build and review
- Changes merged in small pull requests
- Code review and demos with your team
- Hand over or continue
- Runbooks and a handover session
- Or a monthly plan for ongoing work
Cost and timing
What it costs and how long it takes
The review is free
A 60-minute architecture review of your Spring Boot 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
Spring Boot development, answered.
Straight answers about Spring Boot builds, upgrades, engineers and how the work runs.
Building and supporting Java services with Spring Boot. We build microservices, enterprise REST APIs, Spring Batch jobs, Kafka event services, API gateways and integration back ends.
Yes. Boot 3.5 open-source support ended on 30 June 2026. Spring advises moving to the latest 3.5 release first, then to Boot 4, which needs Java 17 or later.
As a fixed-scope project with milestones, a dedicated team, or engineers who join your team. Scope, people and billing are agreed in a written proposal before work starts.
Yes. They work in your repositories, standups and code review, and your managers direct the work. We handle their employment and any replacement.
Each engineer goes through a technical interview on Java and Spring, a practical code task and a review with a SynconAI lead. You can interview them before they start.
Yes, through the REST, SOAP, Bulk API 2.0 and Pub/Sub APIs. Salesforce provides the Web Services Connector for SOAP and official Pub/Sub API samples in Java.
Our hubs in Delaware and Sydney cover United States and Australian working hours, and we deliver remotely worldwide on your business hours. Overlap hours with your team are agreed before work starts.
Spring and Spring Boot are trademarks of Broadcom Inc. Java and Oracle are trademarks of Oracle and its affiliates. Apache Kafka is a trademark of the Apache Software Foundation. Eclipse Temurin is a trademark of the Eclipse Foundation. Salesforce is a trademark of Salesforce, Inc. Other names are trademarks of their owners. SynconAI is an independent consulting firm and is not affiliated with or endorsed by these organizations.
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