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Freelance Java Tester Jobs (NOW HIRING)

WI ยท On-site

$116K - $151K/yr

Ensuring code quality through unit and integration testing * Collaborating closely with analysts ... Engagement: freelance or employee, depending on profile * Duration: long-term reinforcement for the ...

WI ยท On-site

$51 - $65.75/hr

Je werkt nauw samen met analisten, architecten, testers en andere ontwikkelaars om kwalitatieve ... Competitief salarispakket of aantrekkelijk freelance tarief. * Samenwerking met een ervaren en ...

... testing and automation, platform engineering, and more. This is not tied to a specific position but ... Java, Node.js, Python, Go, PHP * Frontend: React, Angular, Vue.js, TypeScript, HTML/CSS * DevOps & ...

... testing and automation, platform engineering, and more. This is not tied to a specific position but ... Java, Node.js, Python, Go, PHP * Frontend: React, Angular, Vue.js, TypeScript, HTML/CSS * DevOps & ...

Software Engineer

Manhattan, NY ยท On-site

$40/hr

The ideal candidate has strong full-stack development experience with Java/Spring Boot and React ... Participate in code reviews, testing, troubleshooting, and continuous improvement initiatives.

WI ยท On-site

$118K - $156K/yr

Support testing teams during the various testing phases of projects and occasionally contribute to ... PL/I, DB2, MQ, CICS * Java or .Net development stacks as well as a good command of APIs ...

NY ยท On-site

Java/Tomcat based web application software development and maintenance Good knowledge of: Basic ... tuning the testing activities to meet both technical and scientific needs * Attitude to lead ...

Cloud Software Engineer II

Los Angeles, CA ยท On-site

$81K - $141K/yr

Support verification and validation testing, unit testing, and ensuring that all product ... Proficient in Java and JavaScript programming. * Experience developing Web applications using ...

Cloud Software Engineer II

Sylmar, CA ยท On-site

$81K - $141K/yr

Support verification and validation testing, unit testing, and ensuring that all product ... Proficient in Java and JavaScript programming. * Experience developing Web applications using ...

Cloud Software Engineer II

Los Angeles, CA ยท On-site

$81K - $141K/yr

Support verification and validation testing, unit testing, and ensuring that all product ... Proficient in Java and JavaScript programming. * Experience developing Web applications using ...

Freelance Java Tester information

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How much do freelance java tester jobs pay per hour?

As of Sep 9, 2026, the average hourly pay for freelance java tester in the United States is $51.54, according to ZipRecruiter salary data. Most workers in this role earn between $47.12 and $60.82 per hour, depending on experience, location, and employer.

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Infographic showing various Freelance Java Tester job openings in the United States as of August 2026, with employment types broken down into 86% Full Time, 3% Part Time, and 11% Contract. Highlights an 81% Physical, 6% Hybrid, and 13% Remote job distribution, with an average salary of $107,212 per year, or $51.5 per hour.

Senior Java Backend Developer / Integration Engineer

WI โ€ข On-site

$116K - $151K/yr

Other

Posted 22 days ago


Job description

We are looking for a 5 Senior Java Backend Developers / Integration Engineers to strengthen the team working in pharma sector, a strategic integration platform in the healthcare ecosystem. This role is ideal for someone who enjoys building reliable backend services, secure APIs, event-driven integrations, and cloud-connected data flows in a modern Java environment.

Mission

You will join a team responsible for the evolution of the solution, a multi-module platform built around integration, interoperability, security, and data exchange.

Responsibilities
  • Designing and implementing backend features in a modern Java stack
  • Building and maintaining secure APIs and gateway flows
  • Developing integrations with external systems and healthcare partners
  • Working on event-driven communication and asynchronous processing
  • Contributing to data persistence, migration, and operational reliability
  • Supporting cloud-based data exchange patterns and AWS-connected services
  • Ensuring code quality through unit and integration testing
  • Collaborating closely with analysts, architects, and product stakeholders
Tech Environment

The current stack includes:

  • Spring Boot 4
  • Spring Cloud Gateway
  • Spring WebFlux
  • Spring Security
  • Spring Data JPA
  • MariaDB
  • Flyway
  • Redis
  • JWT / OAuth2 Resource Server
  • AWS SDK with S3 , Glue , Athena
  • OpenAPI / Springdoc
  • Jackson
  • Parquet / Hadoop
  • Maven
  • JUnit 5 / Mockito
Qualifications
  • Strong experience in backend development with Java and Spring
  • Solid knowledge of API design, security, and system integration
  • Experience with relational databases such as MariaDB or MySQL
  • Experience with messaging platforms such as Kafka
  • Familiarity with cloud environments, ideally AWS
  • Good understanding of authentication and authorization mechanisms such as JWT and OAuth2
  • A quality-driven mindset with attention to testing, maintainability, and production reliability
  • The ability to work autonomously while collaborating effectively with a broader team
Nice to Have
  • Experience with Spring Cloud Gateway or API gateway patterns
  • Experience with Redis
  • Exposure to healthcare, interoperability, or regulated environments
  • Experience with data pipelines or analytical storage flows using S3 / Athena / Glue
  • Familiarity with hexagonal architecture or domain-driven design principles
Benefits
  • Strategic project with real business and integration impact
  • Modern Java and Spring ecosystem
  • Combination of backend engineering, integration, security, and cloud topics
  • Collaborative team environment
  • Opportunity to contribute to a platform used in a sensitive and meaningful domain
Practical Information
  • Location: Belgium / hybrid possible
  • Engagement: freelance or employee, depending on profile
  • Duration: long-term reinforcement for the team
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