Unico Connect

Hire Java Spring Boot Developers for Enterprise-Grade Applications

Our Java developers build microservices, enterprise APIs and high throughput backend systems on Spring Boot.

Java
Spring Boot
graphql
Postgres
MySQL
redis
docker
Kubernetes
Java Spring Boot developers at work

Java Development, Accelerated with AI

Code Review Support

Claude Code helps our engineers review pull requests for Spring Boot conventions, SOLID principles, security anti patterns and configuration mistakes before a tech lead signs off.

Security Checks

AI helps our engineers check Spring Boot services for OWASP Top 10 risks, vulnerable dependencies and injection flaws before the code reaches staging.

Performance Profiling

JDK Flight Recorder and Micrometer JVM metrics track memory use, garbage collection and API response times, and AI helps our engineers trace a regression to its cause before it affects your SLAs.

Microservice Scaffolding

Claude Code drafts the scaffolding, API contracts and tests for a new Spring Boot microservice, and the engineer reviews each piece before it is merged.

The whole Unico Connect team uses Claude Code daily. Our engineering leads estimate that roughly 80 percent of our production code is AI generated. Engineers are expected to understand the code AI produces, and a tech lead or senior developer reviews it before it ships.

What Our Java / Spring Boot Developers Build

Microservices Architecture

Distributed systems with Spring Cloud, service discovery, API gateways, circuit breakers, and centralized configuration for enterprise-scale applications.

REST & GraphQL APIs

Production grade REST APIs on Spring Web and GraphQL APIs on Spring for GraphQL, with OAuth2 and JWT authentication through Spring Security, rate limiting through Spring Cloud Gateway, versioning, and comprehensive API documentation.

Event-Driven Systems

Asynchronous processing with Kafka, RabbitMQ, and Spring Cloud Stream. Event sourcing and CQRS patterns for high-throughput data pipelines.

Database & Data Layer

JPA/Hibernate with PostgreSQL or MySQL, connection pooling, query optimization, and database migration management with Flyway or Liquibase.

Cloud-Native Deployment

Docker containerization, Kubernetes orchestration, and CI/CD pipelines for Spring Boot services. AWS, GCP, and Azure deployment.

Legacy Java Modernization

Migrate monolithic Java applications to Spring Boot microservices incrementally. Introduce modern patterns, testing, and deployment without business disruption.

VETTING PIPELINE

How engineers earn a spot on our team

Our hiring process has three stages, from the application screen to a project deep dive with background verification, and every new engineer then serves a probation period.

4 checks
Application screen

We source engineers across India through LinkedIn, Wellfound, employee referrals and outbound headhunting. Every application is checked for stack relevance, years of experience, English and time zone overlap before it moves to a technical interview.

60 to 90 min
Live coding and scenario questions

A live coding round of 60 to 90 minutes in the primary technology of the candidate, followed by scenario based questions on practical applications of that technology.

3 checks
Project deep dive and background verification

Candidates walk us through a recent production project, covering the architecture decisions and what they would change in hindsight. A third party background verification agency then confirms prior employment, education and identity.

Probation
A probation period follows

New engineers then serve a probation period, and those who do not meet our bar do not continue with us.

How It Works

From the first call to a developer working in your team, you choose who joins and when.

Share your requirements

Tell us the experience level, tech stack, project scope and team setup you need. A 30 minute call is usually enough.

Review shortlisted profiles

Vetted candidates are presented within a week, matched to the brief you shared.

Interview your picks

Interview shortlisted developers directly, through technical interviews, pair programming or whatever your process requires.

Onboard and start

Your developer joins your tools and standups, and onboarding completes in 7 to 14 business days.

Engagement Models

Dedicated developer engagement

Dedicated Developer

A Java Spring Boot developer works only on your project, inside the tools and workflows of your team.

Best for Ongoing ownership of Spring Boot services and APIs
Book a Consultation
Managed team engagement

Managed Team

We assemble and manage a Java and Spring Boot team with a tech lead, handling delivery end to end against your requirements.

Best for Ongoing backend platform delivery with a tech lead
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Project based engagement

Project Based

Fixed scope, timeline, and budget. We deliver the project and hand off the codebase with documentation.

Best for Spring Boot proofs of concept and MVPs
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Engagement terms

  • Vetted candidates are presented within a week, and onboarding completes in 7 to 14 business days.
  • Your developer works as an extension of your team, directly in your channels.
  • For international clients, the assigned team aims for at least 4 hours of overlap with your business day, and our night shift team can cover your business hours for support.
  • Our replacement guarantee gives you a replacement vetted developer at no extra fee if the placed developer is not the right fit or underperforms.
  • We offer fixed scope for proofs of concept and MVPs, then move to a retainer for ongoing work, so the engagement can scale with you.
  • Retainers run for at least 3 months, then continue month to month with 30 days notice.
  • Rates run $25 to $50 an hour depending on seniority, and fixed scope projects have a $10,000 minimum.
  • We invoice in USD, euros or INR.
  • We sign a mutual NDA before discovery starts, and IP assignment and all other contract terms are set out in the MSA and SOW you sign when the engagement begins.

PRICING

Transparent Java Spring Boot developer rates, published

$25 to $50 per hour

Dedicated Java Spring Boot developers, by seniority

$10,000 minimum

Fixed scope projects

US specialists typically bill $150 to $300 per hour for comparable scope. Every engagement is scoped individually before any number becomes a quote.

See all engagement models and hire pricing

Our Work

Healthcare AI🇪🇺 Europe

Built a PHI redaction pipeline for medical imaging that preserved diagnostic quality

Three layers of detection across the PHI surfaces in DICOM files
Diagnostic image quality treated as a hard constraint
Network isolated, in house deployment for sensitive data
A complete per file audit trail, defensible in a compliance review

3 layers

Of PHI protection

Intact

Diagnostic quality

In network

Deployment

View Case Study
DICOM PHI detection
DICOM PHI detection
DICOM PHI detection

Your Enterprise Backend, Built for Reliability

Talk to an Expert

Frequently Asked Questions

Rates run $25 to $50 an hour depending on seniority, and fixed scope projects have a $10,000 minimum. US specialists typically bill $150 to $300 per hour for comparable work. Spring Boot itself is open source under the Apache 2.0 license, so the framework adds no license fee, while cloud hosting, managed databases and any managed Kafka or Kubernetes service are billed separately by your cloud provider.

Java & Backend Engineering Insights

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