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Freelance Java Backend Developer Jobs in Saint Louis, MO

Jobs for Humanity

Java Backend Developer

O Fallon, MO

$47.25 - $61.25/hr

Design, develop, and maintain backend applications using Java 8 and the Spring Framework. * Build ... CI/CD and DevOps practices. * Unit testing (JUnit or Mockito). * Bachelor's degree in computer ...

Sigmaways Inc

Java Backend Developer

Saint Louis, MO · On-site

$49 - $63.75/hr

Excellent capabilities in Java applications and Object Oriented concepts * Deep functional ... Proficient oral and written communication skillsBS or MS in engineering, com * Hadoop - Nice to ...

Zentek Infosoft Inc.

Java Engineer

O Fallon, MO · On-site

$48.50 - $66.50/hr

... Java Backend Developer * Here is the JD: Java Engineer * An ideal candidate for this role would have extensive experience in Java development and be well-versed in cloud-native applications ...

Purplejack Technologies LLC

Java Developer

O Fallon, MO · On-site

$47.75 - $61.75/hr

Hiring: Software Development Engineer (Java Backend) - W2 📍 Location: O''Fallon, MO (Hybrid) - Local candidates only Must-Have Skills: ✔ Java ✔ J2EE ✔ Spring & Spring Boot ✔ Kafka ✔ ...

TEKsystems

Backend Developer - Top Secret

Saint Louis, MO

$97K - $160K/yr

Backend Developer Location: St. Louis, MO or Washington, DC Relocation Assistance Available This ... Build APIs, middleware, proxies, and integration services using Python, Node.js, and Java * Extend ...

New

TEKsystems

Backend Developer - Top Secret

Saint Louis, MO

$97K - $160K/yr

Backend Developer Location: St. Louis, MO or Washington, DC Relocation Assistance Available This ... Build APIs, middleware, proxies, and integration services using Python, Node.js, and Java * Extend ...

New

Auritas

Java Lead Backend Developer

Saint Louis, MO · On-site

$120K/hr

* Strong Java developer with very good understanding of micro services * Develop and consume APIs using HTTP/Rest. * Skills on at least one major JS library /frame work. * Exposure to relational/non ...

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$53

$71

How much do freelance java backend developer jobs pay per hour?

As of Jul 26, 2026, the average hourly pay for freelance java backend developer in Saint Louis, MO is $53.11, according to ZipRecruiter salary data. Most workers in this role earn between $47.21 and $61.25 per hour, depending on experience, location, and employer.
Freelance Java Backend Developer jobs near you

Java Backend Developer

Jobs for Humanity

O Fallon, MO

$47.25 - $61.25/hr

Full-time

Posted 27 days ago

Job description

Job Description

Key Responsibilities:

  • Design, develop, and maintain backend applications using Java 8 and the Spring Framework.
  • Build real-time, event-driven systems using Kafka.
  • Collaborate with cross-functional teams to deliver scalable solutions.
  • Ensure code quality through reviews and best practices.
  • Troubleshoot issues across development, testing, and production environments.
  • Continuously improve development processes and systems.

Mandatory Skills:

  • Strong experience in Java 8 and OOP concepts.
  • Hands-on experience with Spring Boot and Spring MVC.
  • Expertise in Kafka (real-time streaming and pipelines).
  • Solid understanding of REST APIs and Microservices.
  • Experience with SQL and NoSQL databases.
  • Familiarity with Git.
Qualifications
  • Cloud platforms (AWS, Azure, or GCP).
  • Docker and Kubernetes.
  • Agile/Scrum experience.
  • CI/CD and DevOps practices.
  • Unit testing (JUnit or Mockito).
  • Bachelor's degree in computer science, IT, or a related field.
  • Experience: 7-10 Years
Additional Information

All your information will be kept confidential according to EEO guidelines.

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