Available for contracts · Spain & Remote

Senior Java
Backend Engineers
on demand.

Software Republic is a B2B collective of senior Java engineers with 10+ years of experience, specializing in Spring Boot, microservices, and REST APIs. We embed directly into your team — no overhead, no noise.

10+ Years avg. exp.
48h To deployment
100% Senior profiles

// What we do

[01]

Staff Augmentation

We embed senior Java engineers directly into your existing team. You get full-stack backend capability without the recruitment overhead or long-term hiring commitment.

[02]

Microservices Architecture

Design and build distributed systems that scale. We specialize in event-driven architectures, service decomposition, and resilient API design for enterprise environments.

[03]

Legacy Modernization

Migrate monolithic Java applications to modern Spring Boot microservices. We do it incrementally — keeping your systems live while we transform them.

[04]

REST & API Design

From OpenAPI spec to production-ready implementation. We build clean, versioned, well-documented APIs that integrate seamlessly with your ecosystem.

[05]

Cloud & DevOps

Containerized deployments on Kubernetes, CI/CD pipelines, and cloud infrastructure on AWS or Azure. We ship fast and reliably from day one.

[06]

Technical Consulting

Architecture reviews, performance audits, and engineering leadership support. We help you make the right technical decisions at the right time.

// Our stack

Deep expertise.
Production-proven tools.

Java 17/21 Spring Boot Microservices REST APIs Spring Cloud Kafka RabbitMQ Hibernate / JPA PostgreSQL MongoDB Redis Docker Kubernetes AWS Azure CI/CD RxJava Maven / Gradle JUnit 5 OpenAPI / Swagger

Only seniors.
Only Java.
Only B2B.

// Enterprise engagements

Clients & Team Background

Who we work with — and where our engineers come from.

Software Republic  ·  Direct client
Team experience  ·  Brought by our engineers from previous engagements

INDITEX

via Hiberus  ·  Retail

Large-scale backend systems for multi-million user retail platforms.

ING

via Amaris  ·  Banking

Core banking in regulated, compliance-heavy environments.

BBVA

via GFT  ·  Finance

Distributed financial services with high-availability requirements.

PSA Group

via SIVSA  ·  Automotive

Enterprise automotive systems with complex multi-vendor integration.

Ready to
ship faster?

Location Madrid, Spain · Remote
Entity Software Republic S.L.