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Freelance Integration Software Engineer Jobs (NOW HIRING)

asrcfh

Software Integration & Test Engineer

Moorestown, NJ

$102K - $138K/yr

The Software Integration & Test Engineer supports system-level software integration within a laboratory environment. This role executes requirement-driven manual and automated integration testing ...

asrcfh

Software Integration & Test Engineer

Moorestown, NJ

$102K - $138K/yr

The Software Integration & Test Engineer supports system-level software integration within a laboratory environment. This role executes requirement-driven manual and automated integration testing ...

TIAG

Senior AI-ML Integration Software Engineer

Reston, VA

$127K - $168K/yr

... integration of cutting-edge Artificial Intelligence (AI) and Machine Learning (ML) capabilities into our product suite. The ideal candidate will combine strong traditional software engineering ...

Peraton

Software Integration Engineer

Red Bank, NJ · On-site

$106K - $143K/yr

Responsibilities Peraton Labs is seeking a hands-on Software Integration Engineer to be responsible for building, testing, packaging, and maintaining the containerized software deliverables for ...

DCS Corp

F-35 WIPT Software Integration Engineer

Eglin, FL

$95K - $127K/yr

Weapon System Software Integration Engineer for the F-35 Lightning II Joint Strike Fighter, Joint Program Office, Weapons Integration Product Team (WIPT) providing software engineering support for ...

Peraton

Software Integration Engineer

Red Bank, NJ · On-site

$104K - $166K/yr

Responsibilities Peraton Labs is seeking a hands-on Software Integration Engineer to be responsible for building, testing, packaging, and maintaining the containerized software deliverables for ...

Peraton

Software Integration Engineer

Red Bank, NJ

$106K - $143K/yr

Responsibilities Peraton Labs is seeking a hands-on Software Integration Engineer to be responsible for building, testing, packaging, and maintaining the containerized software deliverables for ...

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Showing results 21-40

All JobsIntegration Software Engineer JobsFreelance Integration Software Engineer Jobs

Freelance Integration Software Engineer information

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$44.5K

$124.3K

$173.5K

How much do freelance integration software engineer jobs pay per year?

As of Aug 10, 2026, the average yearly pay for freelance integration software engineer in the United States is $124,275.00, according to ZipRecruiter salary data. Most workers in this role earn between $104,000.00 and $140,000.00 per year, depending on experience, location, and employer.

What is the difference between Freelance Integration Software Engineer vs Freelance Software Developer?

AspectFreelance Integration Software EngineerFreelance Software Developer
Primary FocusDesigning and implementing system integrations and APIsDeveloping standalone applications or features
Required SkillsAPI development, system architecture, integration toolsProgramming languages, application development, UI/UX
Work EnvironmentClient sites, remote, collaborative with IT teamsRemote, independent, project-based
Common CertificationsAPI certifications, cloud platform credentialsProgramming language certifications, software development courses

Freelance Integration Software Engineers focus on connecting different systems and APIs, often working closely with IT teams. Freelance Software Developers create standalone applications or features. While both roles require programming skills, integration engineers emphasize system interoperability, whereas developers focus on application creation.

What are some common challenges a freelance integration software engineer might face when working with multiple clients?

Freelance Integration Software Engineers often encounter challenges such as managing different client expectations, working with diverse technology stacks, and aligning integration standards across various systems. Since each client may use unique tools and workflows, adaptability and strong communication skills are essential to ensure seamless integration. Additionally, coordinating with remote development teams and adhering to project timelines can be demanding, but these experiences also help build a versatile skill set and professional reputation.

What is a freelance integration software engineer?

A Freelance Integration Software Engineer is an independent professional who specializes in connecting and combining different software systems so they can work together seamlessly. They are typically hired on a project basis to develop, implement, and maintain integrations between applications, databases, APIs, and other digital services. These engineers ensure data flows smoothly across platforms, streamline business processes, and resolve compatibility issues. Freelancers in this role often work remotely and serve multiple clients across industries.

What are the key skills and qualifications needed to thrive as a freelance integration software engineer?

To thrive as a Freelance Integration Software Engineer, you need strong programming skills (often in languages like Java, Python, or JavaScript), experience with APIs, and a solid understanding of system integration concepts, typically backed by a degree in computer science or related field. Familiarity with integration platforms (such as MuleSoft, Dell Boomi, or Zapier), cloud services, and relevant certifications (like MuleSoft Certified Developer or AWS Certified Solutions Architect) is highly valuable. Excellent problem-solving, communication, and time-management skills help you collaborate with clients and efficiently deliver solutions in a freelance environment. These capabilities are essential to ensure seamless connectivity between systems, deliver high-quality client solutions, and manage projects independently.
More about Freelance Integration Software Engineer jobs
What cities are hiring for Freelance Integration Software Engineer jobs? Cities with the most Freelance Integration Software Engineer job openings:
What are the most commonly searched types of Integration Software Engineer jobs? The most popular types of Integration Software Engineer jobs are:
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Freelance Integration Software Engineer jobs near you
Infographic showing various Freelance Integration Software Engineer job openings in the United States as of August 2026, with employment types broken down into 50% Full Time, and 50% Contract. Highlights an 75% In-person, and 25% Remote job distribution, with an average salary of $124,275 per year, or $59.7 per hour.

Software Development and Integration Engineer

AST SpaceMobile

Lanham, MD • On-site

$104K - $140K/yr

Full-time

Posted 20 days ago

Job description

AST SpaceMobile is building the first and only global cellular broadband network in space to operate directly with standard, unmodified mobile devices based on our extensive IP and patent portfolio and designed for both commercial and government applications. Our engineers and space scientists are on a mission to eliminate the connectivity gaps faced by today's five billion mobile subscribers and finally bring broadband to the billions who remain unconnected.
Position Overview
We are seeking a Software Development and Integration Engineer to support the development, integration, and deployment of software solutions for advanced communications, aerospace, defense, and mission-critical technology programs. In this role, you will work closely with systems engineers, software developers, and customers to integrate software components into cohesive, high-performance systems that meet operational and technical requirements.
The ideal candidate has experience with software integration, automation, DevOps practices, and software-hardware integration. This individual will play a key role in developing integration strategies, maintaining build and deployment environments, troubleshooting complex technical issues, and supporting system-level testing and verification activities.
Key Responsibilities
  • Collaborate with customers, systems engineers, and software development teams to define software requirements, architecture concepts, integration strategies, and test plans.
  • Perform integration of software components, firmware, embedded applications, and third-party libraries into operational systems.
  • Develop and maintain software integration plans, procedures, and automated deployment processes.
  • Design and implement automation scripts to improve build, testing, deployment, and release workflows.
  • Define and maintain software interfaces, integration dependencies, and configuration requirements.
  • Configure, manage, and maintain software development and integration environments, including source control repositories, build systems, and CI/CD pipelines.
  • Troubleshoot and resolve software integration issues through root cause analysis and cross-functional collaboration.
  • Support software verification, validation, and system-level testing activities.
  • Maintain software build documentation, release records, and configuration management artifacts to ensure traceability and repeatability.
  • Support software-hardware integration efforts and assist in validating system functionality and performance.
  • Participate in design reviews, technical discussions, and continuous improvement initiatives.
  • Contribute to the development of new capabilities and enhancements for customer-focused solutions.

Qualifications
Education
Bachelor's degree in Computer Engineering, Software Engineering, Computer Science, Electrical Engineering, or a related technical discipline.
Relevant technical certifications are a plus.
Experience
  • A minimum of 5 years of experience in software integration, software engineering, DevOps, or related technical roles.
  • Experience supporting complex software development and integration projects.
  • Experience working in aerospace, defense, telecommunications, embedded systems, or other highly regulated technical environments.
  • Experience with software build, release, and deployment processes.
  • Preferred Qualifications
  • Experience with embedded systems, real-time operating systems (RTOS), or software-hardware integration.
  • Experience supporting mission-critical, aerospace, telecommunications, or defense-related systems.
  • Experience developing automation frameworks and deployment pipelines.
  • Familiarity with systems engineering processes, requirements management, and verification activities.
  • Experience integrating third-party software components and applications.
  • Knowledge of software configuration management and release management best practices.
  • Experience supporting test automation and continuous integration environments.
  • Eligibility to obtain and maintain a government security clearance.

Soft Skills
  • Strong interpersonal skills with the ability to collaborate effectively across engineering and technical teams.
  • Proven ability to work within cross-functional and multidisciplinary environments.
  • Excellent written and verbal communication skills.
  • Strong analytical and troubleshooting abilities with a structured approach to problem-solving.
  • Meticulous attention to detail to ensure the accuracy of software builds, documentation, and deliverables.
  • Strong organizational and time-management skills with the ability to manage multiple priorities.
  • Self-motivated with the ability to work independently and take initiative.
  • Adaptability and flexibility in a fast-paced development environment.
  • Commitment to continuous improvement and operational excellence.

Technology Stack
  • Programming and scripting languages: Python, C/C++, Bash, or equivalent.
  • Version control systems: Git or equivalent source code management tools.
  • CI/CD and build automation tools: Jenkins, GitLab CI, Azure DevOps, or equivalent.
  • Software development and debugging tools.
  • Linux-based development and integration environments.
  • Software configuration and release management tools.
  • Continuous integration and automated testing frameworks.
  • Microsoft Office Suite (Word, Excel, PowerPoint, Outlook).
  • Issue tracking and collaboration platforms.

Physical Requirements
  • Ability to work in a standard office environment and use a computer for extended periods.
  • Ability to review software documentation, system diagrams, technical specifications, and engineering data.
  • Ability to participate in meetings, design reviews, and collaborative engineering sessions.
  • Ability to perform detailed analysis and troubleshooting of software and system integration issues.
  • May occasionally work in laboratory, integration, testing, or operational environments.
  • Ability to travel occasionally as required for program support, testing activities, training, or customer engagements.

Additional Requirements
  • Eligibility to obtain and maintain a U.S. government security clearance.
  • U.S. citizenship may be required based on program and contract requirements.

This job description may not be inclusive to the duties and responsibilities listed. Additional tasks may be assigned to the employee from time to time or the scope of the job may change as needed by business demands.
AST SpaceMobile is an Equal Opportunity, at will Employer; employment is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

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