ZipRecruiter

Log In

1

Freelance Integration Software Engineer Jobs (NOW HIRING)

Steampunk

Software / Integration Engineer

Mclean, VA · On-site

$105K - $141K/yr

The Software / Integration Engineer will work across technical teams to ensure integrations operate reliably and securely while meeting established technical and security requirements. This role ...

Steampunk

Software / Integration Engineer

Mclean, VA · On-site

$106K - $143K/yr

The Software / Integration Engineer will work across technical teams to ensure integrations operate reliably and securely while meeting established technical and security requirements. This role ...

Steampunk

Software / Integration Engineer

Mclean, VA · On-site

$105K - $141K/yr

The Software / Integration Engineer will work across technical teams to ensure integrations operate reliably and securely while meeting established technical and security requirements. This role ...

Liberty Mutual

Senior Data Integration Software Engineer

$125K - $165K/yr

The Global Finance Technology organization is seeking an experienced Senior Data Integration Software Engineer to join the Data Subledger team within the OneGL program. Under limited supervision ...

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 ...

previous pagenext page

Showing results 21-40

All JobsFreelance JobsTechnology JobsSoftware JobsSoftware Developer JobsFreelance Integration Software Engineer Jobs

Freelance Integration Software Engineer information

See salary details

$44.5K

$124.3K

$173.5K

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

As of Sep 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 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.

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 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.

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:

What states have the most Freelance Integration Software Engineer jobs?

States with the most job openings for Freelance Integration Software Engineer jobs include:

What are popular job titles related to Freelance Integration Software Engineer jobs?

For Freelance Integration Software Engineer jobs, the most frequently searched job titles are:

Freelance Integration Software Engineer jobs near you
Infographic showing various Freelance Integration Software Engineer job openings in the United States as of September 2026, with employment types broken down into 1% Internship, 1% As Needed, 88% Full Time, 7% Part Time, and 3% Contract. Highlights an 85% Physical, 3% Hybrid, and 12% Remote job distribution, with an average salary of $124,275 per year, or $59.7 per hour.

Software / Integration Engineer

Mclean, VA • On-site

Steampunk
IT Services • 201 - 500 employees
Learn more about Steampunkexternal

$105K - $141K/yr

Other

Posted 16 days ago

Job description

Overview
We are seeking a Software / Integration Engineer responsible for designing, developing, and integrating software solutions within authorized and controlled environments. This role will support system and application integrations, implement secure data exchanges, and develop configurable logging and audit capabilities to support egress/leakage auditing and traceability.
The Software / Integration Engineer will work across technical teams to ensure integrations operate reliably and securely while meeting established technical and security requirements. This role requires strong software engineering and integration experience, with an emphasis on secure system interoperability, logging, monitoring, and auditability.
Contributions
  • Design, develop, implement, and maintain software integrations across applications, systems, platforms, and authorized environments
  • Develop integration components, services, and interfaces to support secure and reliable data exchange between systems
  • Implement and support integrations within defined technical, security, and operational boundaries
  • Develop and maintain configurable application and system logging to support monitoring, auditing, troubleshooting, and security requirements
  • Ensure logs contain appropriate information to support traceability and can be ingested into enterprise monitoring and analysis platforms
  • Support integration of application and system logs with Splunk to enable monitoring, analysis, and audit capabilities
  • Implement audit trails to capture relevant system activities, data exchanges, and integration events
  • Support per-round egress and leakage auditing to identify and document potential unauthorized or unintended data exposure
  • Develop mechanisms to track, validate, and audit data movement across system and environment boundaries
  • Troubleshoot integration, connectivity, data exchange, logging, and system interoperability issues
  • Collaborate with software engineers, cybersecurity teams, infrastructure teams, cloud engineers, and other technical stakeholders to develop and maintain secure integrations
  • Incorporate security, logging, and audit requirements throughout software and integration development
  • Develop and maintain technical documentation for integrations, interfaces, data flows, logging configurations, and audit capabilities
  • Support testing and validation of software integrations, logging, and audit functionality
  • Utilize version control, CI/CD, and software engineering best practices throughout the development lifecycle
  • Support an Agile software development lifecycle

Qualifications
  • Ability to obtain and maintain a government security clearance
  • Bachelor's degree in Computer Science, Software Engineering, Information Technology, Engineering, Information Systems, or a related technical discipline, or equivalent relevant experience
  • 5+ years of experience in software engineering, systems integration, application integration, or related technical disciplines
  • Strong programming and software development experience using modern programming languages and development frameworks
  • Experience designing and implementing integrations between applications, systems, services, or platforms
  • Experience developing and integrating APIs, services, or other system interfaces
  • Experience implementing application or system logging, monitoring, and audit capabilities
  • Understanding of secure system integration, data exchange, and data movement across system or environment boundaries
  • Knowledge of security principles related to application and system integration, including access control, data protection, and auditability
  • Experience configuring application and system logs for ingestion into Splunk
  • Experience troubleshooting complex software integration, connectivity, and data exchange issues
  • Experience with version control systems such as Git and CI/CD practices
  • Strong analytical, problem-solving, communication, and collaboration skills

Preferred:
  • Experience implementing audit trails and data egress monitoring capabilities
  • Experience supporting software integrations within controlled, restricted, or highly regulated environments
  • Experience with cloud-based application and system integrations
  • Experience with containerized applications, microservices, or distributed systems
  • Experience with automated testing and integration testing
  • Experience implementing encryption within system integrations in accordance with federal standards to protect data confidentiality and integrity
  • Knowledge of federal cybersecurity, logging, monitoring, or audit requirements
  • Experience working within federal government or other highly regulated environments
  • Relevant software engineering, cloud, integration, or cybersecurity certification

About steampunk
Steampunk relies on several factors to determine salary, including but not limited to geographic location, contractual requirements, education, knowledge, skills, competencies, and experience. The projected compensation range for this position is $140,000 to $170,000. The estimate displayed represents a typical annual salary range for this position. Annual salary is just one aspect of Steampunk's total compensation package for employees. Learn more about additional Steampunk benefits here.
Identity Statement
As part of the application process, you are expected to be on camera during interviews and assessments. We reserve the right to take your picture to verify your identity and prevent fraud.
Steampunk is a Change Agent in the Federal contracting industry, bringing new thinking to clients in the Homeland, Federal Civilian, Health and DoD sectors. Through our Human-Centered delivery methodology, we are fundamentally changing the expectations our Federal clients have for true shared accountability in solving their toughest mission challenges. If you want to learn more about our story, visit http://www.steampunk.com.
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status, or any other characteristic protected by law. Steampunk participates in the E-Verify program.

Apply