Java Software Engineering Jobs at Rex.zone

Find remote and on-site Java roles across microservices, cloud-native platforms, and AI workflow integrations. Apply fast, compare employers, and grow your JVM career.

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About the Role

Java software engineering jobs focus on building scalable services, APIs, and data pipelines on the JVM. Teams use Spring Boot, Kotlin/Java, and cloud-native platforms to deliver reliable microservices for high-throughput applications. Increasingly, Java engineers contribute to AI product infrastructure: integrating data labeling tools, RLHF feedback collection services, content safety moderation pipelines, prompt evaluation dashboards, named entity recognition processing services, and computer vision annotation backends that ensure training data quality and model performance improvement.

Key Responsibilities

Responsibilities vary by level and employer type. Core tasks emphasize production readiness, observability, and AI-adjacent integration.

Required Skills

Strong Java fundamentals and modern platform engineering practice are essential.

Preferred Experience

Real-world delivery experience in AI/ML-centric environments helps candidates stand out.

Domains and Project Types

Roles span classic enterprise backends and modern AI products.

Work Types and Search Modifiers

Explore roles that match your availability and seniority on Rex.zone.

Employer Types

Find teams aligned to your career goals.

Tech Stack and Tools

Common stacks that appear across java software engineering jobs.

Career Paths

Progress across responsibility and impact levels.

Compensation and Benefits

Transparent ranges are posted per employer; typical bands vary by location.

Application Process

Rex.zone streamlines discovery and application.

Why Rex.zone

A navigational hub built for developer careers and AI-aware backends.

AI/ML Training Workflow Connections

Modern roles extend beyond traditional backend to ML-integrated platforms.

Frequently Asked Questions

  • Q: What counts as java software engineering jobs on Rex.zone?

    Roles involving JVM-based backend development, microservices, APIs, data pipelines, and platform engineering with Java or Kotlin. Many listings connect to AI workflows like RLHF collection, model evaluation telemetry, data labeling integrations, NER pipelines, and content safety labeling services.

  • Q: Are remote and contract options available?

    Yes. You can filter by remote, contract, freelance, full-time, entry-level, and senior. Rex.zone surfaces employer types including AI labs, tech startups, enterprises, BPOs, and annotation vendors.

  • Q: Which stacks are most in demand?

    Spring Boot, Spring Cloud, Kafka, PostgreSQL, Redis, Docker, Kubernetes, Terraform, OpenTelemetry, and OAuth2/OIDC are common. Quarkus, Micronaut, and Kotlin also appear in performance-focused or greenfield services.

  • Q: How do these roles intersect with AI/ML training?

    Java engineers build the infrastructure behind training data quality pipelines, prompt evaluation services, RLHF feedback loops, annotation guidelines compliance tooling, and large language model evaluation dashboards.

  • Q: What tips help applicants stand out?

    Show production examples of resilient microservices, observability tooling, JVM tuning, and experience with ML-integrated backends. Highlight contributions to QA evaluation automation, data lineage, and security compliance.

  • Q: How do I apply on Rex.zone?

    Create a profile, search java software engineering jobs, filter by modifiers and domains, review role details, and submit your application. Expect structured interview loops including code tests and system design.

230+Domains Covered
120K+PhD, Specialist, Experts Onboarded
50+Countries Represented

Industry-Leading Compensation

We believe exceptional intelligence deserves exceptional pay. Our platform consistently offers rates above the industry average, rewarding experts for their true value and real impact on frontier AI. Here, your expertise isn't just appreciated—it's properly compensated.

Work Remotely, Work Freely

No office. No commute. No constraints. Our fully remote workflow gives experts complete flexibility to work at their own pace, from any country, any time zone. You focus on meaningful tasks—we handle the rest.

Respect at the Core of Everything

AI trainers are the heart of our company. We treat every expert with trust, humanity, and genuine appreciation. From personalized support to transparent communication, we build long-term relationships rooted in respect and care.

Ready to Shape the Future of Software Engineering?

Apply Now.