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Contractual Api Developer Jobs (NOW HIRING)

Steampunk

Integration Engineer

Mclean, VA

$100K - $160K/yr

Minimum 2 years of experience as a REST API Developer - designing, creating, and supporting complex ... limited to geographic location, contractual requirements, education, knowledge, skills ...

Steampunk

Integration Engineer

Mclean, VA

$100K - $160K/yr

Minimum 2 years of experience as a REST API Developer - designing, creating, and supporting complex ... limited to geographic location, contractual requirements, education, knowledge, skills ...

Steampunk

Integration Engineer

Mclean, VA · On-site +1

$100K - $160K/yr

Minimum 2 years of experience as a REST API Developer - designing, creating, and supporting complex ... limited to geographic location, contractual requirements, education, knowledge, skills ...

GDIT

CDAO Advana - API Specialist

Washington, DC · On-site +1

$128.04K - $173.23K/yr

Develops developer portals, technical documentation, interface contracts, onboarding guides, and ... Rather, salary will be set based on experience, geographic location and possibly contractual ...

API Heat Transfer

Project Manager

Buffalo, NY

$75K - $85K/yr

At API Heat Transfer, we take our culture transformation seriously. Participation in our Culture ... Support the execution of engineer-to-order manufacturing projects from release through completion

APi Inc

Estimator 1 and 2

New Brighton, MN · On-site

$75.40K - $113K/yr

Their duties include communicating with personnel and contractual professionals or vendors, using ... Thorough understanding of engineering, architectural, and other construction drawings * Manage ...

APi Group

Estimator 1 and 2

Saint Paul, MN · On-site

$90.50K - $135.70K/yr

Their duties include communicating with personnel and contractual professionals or vendors, using ... Thorough understanding of engineering, architectural, and other construction drawings * Manage ...

API Heat Transfer

Project Manager

Buffalo, NY

$75K - $85K/yr

This role partners closely with Sales, Engineering, Operations, Quality, and external stakeholders ... At API Heat Transfer, we take our culture transformation seriously. Participation in our Culture ...

API Heat Transfer

Project Manager

Buffalo, NY

$75K - $85K/yr

This role partners closely with Sales, Engineering, Operations, Quality, and external stakeholders ... At API Heat Transfer, we take our culture transformation seriously. Participation in our Culture ...

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How much do contractual api developer jobs pay per hour?

As of May 28, 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 May 2026, with employment types broken down into 86% Full Time, 6% Part Time, and 8% Contract. Highlights an 67% Physical, 4% Hybrid, and 29% Remote job distribution, with an average salary of $124,567 per year, or $59.9 per hour.
CDAO Advana - API Specialist

CDAO Advana - API Specialist

General Dynamics Information Technology

Washington, DC

$128.04K - $173.23K/yr

Full-time

Medical, Dental, Vision, Retirement

Posted 12 days ago

General Dynamics Information Technology rating

7.8

Company rating: 7.8 out of 10

Based on 61 frontline employees who took The Breakroom Quiz

68th of 204 rated it services

Job description

REQ#: RQ220259Public Trust: None Requisition Type: Pipeline Your Impact

Own your opportunity to support our nation's defense. Make an impact by connecting and securing critical operations across the globe, keeping our country safe and secure.

Job Description

Join GDIT and be a part of the team of men and women that solve some of the world's most complex technical challenges. The CDAO Advana team is seeking an API Specialist to join their efforts in the DC area.

Advana is the Chief Digital and Artificial Intelligence Offices (CDAO) enterprise-wide, multi-domain data, analytics, and artificial intelligence (AI) platform that provides all DoW military and civilian decision makers, analysts, and builders with unprecedented access to enterprise data, tools, and capabilities.

This is a proposal with award expected June 2026. If interested, please apply as we are interviewing and making contingent offers now.

Duties include:

  • API Specialist SME (C.5.2) - Develops and governs enterprise API strategies and technical standards supporting Advana interoperability across Unclassified and NIPR, Secret and SIPR, and Top Secret and JWICS enclaves. Designs API architectures that standardize interface specifications, message schemas, routing patterns, mediation workflows, versioning practices, and service-level behaviors for mission data exchange across Combatant Commands, Joint Staff elements, and federal mission partners.
  • Leads API lifecycle processes from design and development through onboarding, testing, deployment, operational monitoring, and retirement, using platforms such as Apigee, Kong, MuleSoft, and Google Cloud API Gateway.
  • Implements API governance frameworks incorporating authentication and authorization models, certificate management, schema validation, throttling controls, and continuous compliance checks driven by security policies and enterprise reference designs.
  • Conducts performance optimization for high-volume APIs by applying caching strategies, policy tuning, traffic shaping, and analytics-based capacity planning.
  • Develops developer portals, technical documentation, interface contracts, onboarding guides, and reusable templates that strengthen consistency and accelerate adoption across distributed engineering teams.
  • Provides technical leadership for large-scale integration efforts, coordinating closely with platform engineers, cybersecurity analysts, data services teams, and operations personnel to align APIs with service dependencies, cross-domain data workflows, and enclave-specific operational constraints.
  • Mentors development teams through structured workshops, code reviews, and governance consultations to advance API maturity, reduce integration defects, and increase mission readiness across the Advana enterprise.

Basic Qualifications:

  • BS degree; additional years of experience may be considered in lieu of degree
  • 8+ years of experience developing API architectures and lifecycles
  • IAT II - Security+
  • TS with SCI eligibility

WHAT CAN GDIT OFFER YOU?

  • Excellent customizable health benefits (Medical, Dental and Vision)
  • 401K with company match
  • Educational Assistance and eLearning
  • Flexible work week
  • Internal mobility team dedicated to employee advancement
  • Rewards and Recognition programs
  • Innovative and collaborative environment encouraging of highly motivated critical thinking
Work Requirements
Years of Experience

8 + years of related experience

* may vary based on technical training, certification(s), or degree

Certification
Travel Required

None

Citizenship

U.S. Citizenship Required

Salary and Benefit Information

The likely salary range for this position is $128,039 - $173,229. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.
View information about benefits and our total rewards program.

About Our Work

We are GDIT. A global technology and professional services company that delivers technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across over 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, cloud, cyber and application development. Together with our customers, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology.

Join our Talent Community to stay up to date on our career opportunities and events at gdit.com/tc.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

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About General Dynamics Information Technology

Sourced by ZipRecruiter

GDIT is a global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense, and intelligence community. Its 30,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. The company operates across 50+ countries worldwide, offering leading capabilities in digital modernization, AI/ML, cloud, cyber, and application development.

Industry

It services

Company size

10,000+ Employees

Headquarters location

Falls Church, VA, US

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