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Contractual Api Developer Jobs (NOW HIRING)

GDIT

Software Developer (Java) - TS/SCI w/Poly

Mclean, VA · On-site

$157K - $212K/yr

Experienced in Microservice API development and integration (gRPC/REST) * Deploy micro and macro ... Rather, salary will be set based on experience, geographic location and possibly contractual ...

Centraprise

.Net Full Stack Developer

Seattle, WA · On-site

NET / .NET Core, Automation developer, C#, and RESTful API development. • Good front-end ... Contractual SLAs for production issue fixes. For Severity 1 tickets - SLA timelines can be as short ...

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How much do contractual api developer jobs pay per hour?

As of Jul 9, 2026, the average hourly pay for contractual api developer in the United States is $59.89, according to ZipRecruiter salary data. Most workers in this role earn between $54.57 and $67.31 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Contractual API Developer, and why are they important?

To thrive as a Contractual API Developer, you need strong programming skills in languages such as JavaScript, Python, or Java, along with a solid understanding of API design principles and RESTful architecture. Familiarity with API management tools, documentation platforms like Swagger/OpenAPI, and version control systems such as Git is typically required. Excellent problem-solving, communication, and time management skills help you collaborate with clients and deliver solutions efficiently on project-based timelines. These skills ensure you can build secure, scalable APIs and meet diverse client requirements within contractual constraints.

What are some common challenges faced by contractual API developers, and how can they be managed effectively?

Contractual API developers often face challenges such as quickly adapting to unfamiliar codebases, aligning with the client's existing development standards, and ensuring smooth communication with in-house teams. Managing these challenges requires strong documentation practices, proactive communication, and a clear understanding of project requirements before development begins. Staying organized and setting regular check-ins with stakeholders can help address issues early and keep the project on track.

What are Contractual API Developers?

Contractual API Developers are professionals hired on a contract basis to design, build, and maintain Application Programming Interfaces (APIs) for organizations. They typically work for a specified period or project, rather than as full-time employees. These developers ensure that APIs function correctly, are secure, and meet business requirements, enabling different software systems to communicate efficiently. Contractual API Developers are often brought in for specialized expertise or to handle increased workloads during specific projects.
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Contractual Api Developer jobs near you
Infographic showing various Contractual Api Developer job openings in the United States as of July 2026, with employment types broken down into 91% Full Time, 3% Part Time, and 6% Contract. Highlights an 77% Physical, 4% Hybrid, and 19% Remote job distribution, with an average salary of $124,567 per year, or $59.9 per hour.
Software Integration Engineer

Software Integration Engineer

Altamira Technologies Corp.

Warrenton, VA

Full-time

Posted 13 days ago

Job description

Altamira Technologies has a long and successful history providing innovative solutions throughout the U.S. National Security community. Headquartered in McLean, Virginia, Altamira serves the defense, intelligence, and homeland security communities worldwide by focusing on creating innovative solutions leveraging common standards in architecture, data and security. Altamira believes that our people and the culture of our company differentiate us from other companies.

Position: Software Integration Engineer

Location: Warrenton, VA. Centennial, CO. Augusta, GA.

The Software Integration Engineer will design and build connections between software platforms, through APIs, middleware, event pipelines, and data feeds to connect disparate applications, platforms, and services. Responsible for ensuring integration meets requirements for performance, security, and compliance through end-to-end testing.

Responsibilities:

· Design API integrations between enterprise systems

· Developing, testing, and debugging code to ensure integrated systems function correctly

· Build and maintain integration pipelines using REST, SOAP, GraphQL, and event-driven messaging (Kafka, Azure Service Bus, SQS)

· Create and maintain API documentation

· Debug integration failures systematically

· Conduct integration testing across system boundaries, including negative testing for error and edge cases

· Collaborate with technical teams and third-party API providers during integration development and issue resolution

· Monitor integration health through dashboards and alerts; respond to failures and degraded connectivity in production

Required Qualifications:

· United States citizen

· Active TS/SCI clearance

· Bachelor's degree in CS, Information Systems, or Software Engineering

· Track record of end-to-end integration ownership: design, build, deploy, and monitor

· Minimum 8 years of relevant experience

· Strong problem-solving and analytical skills to troubleshoot complex integration challenges

· Excellent communication and interpersonal skills.

Desired Qualifications:

· Active CI Poly

· Experience in managing large and complex software and mission integration projects.

· Experience in working with a variety of business leaders, IT professionals, and customers

The anticipated salary range for this position is $150,000 to $200,000. Actual compensation will be determined based on several factors, including, but not limited to, the scope of the position, relevant experience, education, certifications, internal equity, customer contractual requirements, security clearance requirements, and other legitimate business considerations.