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Freelance Java Back End Developer Jobs in Houston, TX

Apex Systems

Senior Backend Developer

Houston, TX · On-site

$115K - $149K/yr

Job#: 3049140 Senior Backend Developer Location: Houston, Texas (Onsite) Role Overview An opportunity is available to join a team working on a platform that manages renewable natural gas (RNG ...

Valueprosite

sr. java developer

Texas City, TX · On-site

$49 - $62.50/hr

About the Role We are seeking a motivated and detail-oriented Java Full Stack Developer with at ... The ideal candidate will have hands-on expertise in both frontend and backend development, with ...

Crescens Inc

Java Developer with Angular JS

Houston, TX · On-site

$48.75 - $63/hr

Company Description Shipping Industry We are looking for a Java/J2EE developer with hands on UI ... Previous project Front End Single Page applications and Back End Java (Restful services). * Hands ...

Crescens, Inc.

Java Developer with Angular JS

Houston, TX · On-site

$48.75 - $63/hr

Company Description Shipping Industry We are looking for a Java/J2EE developer with hands on UI ... Previous project Front End Single Page applications and Back End Java (Restful services). * Hands ...

Codeforce 360

FrogRock Java Developer

Houston, TX · On-site

$48.75 - $63/hr

Design and implement Java-based applications, APIs, and backend services. * Troubleshoot, debug, and optimize application performance. * Integrate applications with databases, APIs, and external ...

Jobsbridge

Sr. Hadoop Developer

Houston, TX · On-site

... in back-end programming, specifically Java, JS, Node.js and OOAD Experience writing to network-based API's - preferably REST/JSON or XML/SOAP Analytical and problem solving skills, applied to Big ...

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Freelance Java Back End Developer information

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How much do freelance java back end developer jobs pay per hour?

As of Sep 9, 2026, the average hourly pay for freelance java back end developer in Houston, TX is $52.17, according to ZipRecruiter salary data. Most workers in this role earn between $46.39 and $60.14 per hour, depending on experience, location, and employer.

What does a freelance Java back end developer do?

A Freelance Java Back End Developer is a software professional who specializes in building and maintaining the server-side logic of web applications using the Java programming language. They work independently on a contract basis for various clients, handling tasks such as developing APIs, managing databases, and ensuring the performance and security of the application’s back end. Their responsibilities often include collaborating with front-end developers, integrating third-party services, and troubleshooting server-side issues. Freelancers in this role can work remotely or onsite, offering flexibility to both clients and developers.

What are the key skills and qualifications needed to thrive as a freelance Java back end developer, and why are they important?

To thrive as a Freelance Java Back End Developer, you need strong proficiency in Java, object-oriented programming, RESTful API design, and experience with frameworks like Spring or Hibernate, typically supported by a relevant degree or proven project portfolio. Familiarity with version control systems (such as Git), build tools (like Maven or Gradle), cloud platforms, and continuous integration/continuous deployment (CI/CD) pipelines is highly valued. Outstanding problem-solving abilities, self-motivation, and effective client communication set top freelancers apart. These skills ensure you can deliver robust, maintainable solutions independently and build lasting client relationships.

What are some common challenges faced by freelance Java back end developers when working with multiple clients simultaneously?

Freelance Java Back End Developers often juggle several projects at once, which can present challenges in time management, prioritizing tasks, and aligning with different client expectations. Each client may use distinct tech stacks, communication tools, and development processes, requiring adaptability and strong organizational skills. Clear communication, setting realistic deadlines, and using project management tools can help freelancers maintain quality and meet deliverables across diverse projects.

What is the difference between Freelance Java Back End Developer vs Freelance Java Software Engineer?

AspectFreelance Java Back End DeveloperFreelance Java Software Engineer
CredentialsJava certifications, experience in backend frameworksJava certifications, broader software development skills
Work EnvironmentRemote, project-based, client-specificRemote or on-site, project or product-focused
Industry UsagePrimarily in backend development projectsInvolved in full software development lifecycle
Search & Comparison IntentFocus on backend Java skillsBroader software development expertise

While both roles involve Java skills, a Freelance Java Back End Developer specializes in server-side development, focusing on backend systems. A Freelance Java Software Engineer may have a broader scope, including full-stack or application development, often requiring additional skills beyond backend work.

What are the most commonly searched types of Java Back End Developer jobs in Houston, TX?

The most popular types of Java Back End Developer jobs in Houston, TX are:

What are popular job titles related to Freelance Java Back End Developer jobs in Houston, TX?

For Freelance Java Back End Developer jobs in Houston, TX, the most frequently searched job titles are:

What job categories do people searching Freelance Java Back End Developer jobs in Houston, TX look for?

The top searched job categories for Freelance Java Back End Developer jobs in Houston, TX are:

What cities near Houston, TX are hiring for Freelance Java Back End Developer jobs?

Cities near Houston, TX with the most Freelance Java Back End Developer job openings:

Freelance Java Back End Developer jobs near you
Infographic showing various Freelance Java Back End Developer job openings in Houston, TX as of September 2026, with employment types broken down into 43% Full Time, and 57% Contract. Highlights an 74% In-person, and 26% Remote job distribution, with an average salary of $108,515 per year, or $52.2 per hour.

Senior Backend Developer

Houston, TX • On-site

Apex Systems
IT Services • 1 - 5K employees
Learn more about Apex Systemsexternal

$115K - $149K/yr

Other

Medical, Dental, Vision, Life, Retirement

Posted 8 days ago

Key responsibilities

  • Develop and maintain enterprise-scale .NET applications using ASP.NET Core 9.0 and C#.

  • Design and implement RESTful APIs for biogas trading, inventory management, and regulatory reporting.

  • Build business logic for RINS credit calculations, LCFS compliance, and carbon credit trading.

Job description

Job#: 3049140
Job Description:
Senior Backend Developer
Location: Houston, Texas (Onsite)
Role Overview
An opportunity is available to join a team working on a platform that manages renewable natural gas (RNG) trading, carbon credit calculations, and regulatory compliance for LCFS (Low Carbon Fuel Standard) and RFS (Renewable Fuel Standard) programs.
Key Responsibilities
  • Develop and maintain enterprise-scale .NET applications using ASP.NET Core 9.0 and C#.
  • Design and implement RESTful APIs for biogas trading, inventory management, and regulatory reporting.
  • Build business logic for RINS credit calculations, LCFS compliance, and carbon credit trading.
  • Work with PostgreSQL databases and Entity Framework Core for data persistence.
  • Implement authentication and authorization using Azure Active Directory and Microsoft Identity Platform.
  • Develop email workflow systems and automated reporting for regulatory compliance.
  • Create scheduled background jobs using Quartz.NET for data processing and calculations.
  • Integrate with Microsoft Graph API for SharePoint document management via Azure MS Graph.
  • Build real-time features using SignalR for live trading updates.
  • Implement data validation using FluentValidation.
  • Work with Docker and OpenShift for containerized deployments.
Required Qualifications
Experience:
  • 5+ years of experience with .NET development (C#, ASP.NET Core).
  • Experience with Entity Framework Core and PostgreSQL.
  • Proficiency in RESTful API design and OpenAPI/Swagger documentation.
  • Experience with authentication systems (OAuth2, JWT, Azure AD).
  • Knowledge of containerization (Docker) and Kubernetes/OpenShift.
  • Experience with background job processing and scheduled tasks.
  • Understanding of SOLID principles and clean architecture.
  • Experience with unit testing (xUnit, FluentAssertions) and integration testing.
  • Knowledge of CI/CD pipelines and DevOps practices (ADO).

Preferred Qualifications
  • Experience in energy trading or financial systems.
  • Knowledge of environmental compliance and carbon credit markets.
  • Familiarity with LCFS, RFS, or RINS regulatory frameworks.
  • Experience with Azure cloud services.
  • Knowledge of data processing and complex calculations.
  • Experience with Testcontainers for integration testing.
Business Domain Knowledge
  • Understanding of biogas and renewable natural gas (RNG) markets.
  • Knowledge of carbon credit trading and environmental attribute tracking.
  • Familiarity with petroleum industry regulations and fuel pathway reporting.
  • Experience with inventory management and supply chain tracking.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.
Everforth Apex uses a virtual recruiter as part of the application process. Click for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at
Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our 'Welcome Packet' as well, which an Everforth Apex team member can provide.
Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.
If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at or . Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.
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