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Contractual Api Developer Jobs (NOW HIRING)

Steampunk

Integration Engineer

Mclean, VA · On-site

$100 - $160/hr

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

State of Maryland

$120 - $160/hr

  • Dental

  • Life

This position is responsible for driving API-led connectivity, building APIs, integrating with ... The contractual Senior MuleSoft Developer works collaboratively with Business Analysts, Solution ...

New

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 ...

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 ...

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 ...

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 ...

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Contractual Api Developer information

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How much do contractual api developer jobs pay per hour?

As of Aug 19, 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 is a contractual API developer?

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.

What are the key skills and qualifications needed to thrive as a contractual API developer?

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.
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Contractual Api Developer jobs near you
Infographic showing various Contractual Api Developer job openings in the United States as of August 2026, with employment types broken down into 82% Full Time, 2% Part Time, and 16% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $124,567 per year, or $59.9 per hour.

API Developer/Data Engineer Managing Consultant-Fraud/AI

Guidehouse

Mclean, VA • On-site

Full-time

Medical, Dental, Vision, Life, Retirement

Re-posted 7 days ago

Guidehouse rating

8.0

Company rating: 8.0 out of 10

Based on 28 frontline employees who took The Breakroom Quiz

33rd of 72 rated business consultants

Job description

Job Family:
Technology Consulting
Travel Required:
Up to 50%
Clearance Required:
Ability to Obtain Public Trust
What You Will Do:
The API Developer/Data Engineering Managing (Lead) Consultant serves as a trusted advisor and delivery lead for AI and Data engagements. This role owns solution strategy, oversees delivery teams, develops technical solutions, and partners with clients to drive measurable business outcomes.
Key Responsibilities
  • Lead the design, development, and deployment of data integration and API solutions within related data platforms.
  • Architect and implement end-to-end data pipelines, including ingestion, transformation, validation, and delivery of structured and unstructured data.
  • Develop and maintain ontology models, data schemas, and relationships to support analytics, search, and operational use cases.
  • Integrate data across multiple systems and platforms (e.g., cloud storage, APIs, analytics environments) using scalable and secure patterns.
  • Collaborate with cross-functional teams (data engineering, analytics, product, and security) to ensure seamless system interoperability and data consistency.
  • Implement data validation, quality assurance, and governance processes (e.g., completeness checks, schema validation, metadata integrity).
  • Support development of AI-enabled capabilities (e.g., semantic search, entity resolution, analytics) by enabling high-quality, well-structured data pipelines.
  • Operate within an Agile delivery model, contributing to sprint planning, backlog refinement, user story development, and iterative delivery of technical solutions.
  • Translate business and mission needs into technical requirements and scalable integration designs.
  • Ensure compliance with security, privacy, and audit requirements, including role-based access controls, logging, and data protection standards.
  • Drive technical design decisions, mentor junior engineers, and act as a technical lead within a matrixed team environment.

What You Will Need:
  • Bachelor's degree in Computer Science, Engineering, Information Systems, or related field (or equivalent experience).
  • Based on our contractual obligations, candidate must be located within the United States and a US Citizen.
  • Must be able to OBTAIN and MAINTAIN a Federal or DoD "PUBLIC TRUST" clearance.
  • 5+ years of experience in data engineering, system integration, or platform engineering roles.
  • Proficiency in Python, Java/JS, .NET (C#), RESTful API, XML, and strong SQL skills (including SQL Server) with experience integrating APIs with enterprise applications, databases, and third-party systems.
  • Proficiency in Java/JS, .NET (C#), RESTful API, XML for data transformation, querying, and API development.
  • Proficiency working with various data structure formats (CSV/TXT, JSON, XML, Parquet, etc.).
  • Strong hands-on experience with API development and integration, including:
    - Building and managing data pipelines
    - Ontology/data model development and relationship mapping
    - Integration of data across multiple systems
  • Experience working within cloud platforms (particularly GCP) for scalable data transformation, enrichment, and analytics workflows.
  • Strong understanding of data modeling, schema alignment, and metadata management across integrated systems.
  • Experience implementing data quality, validation, and governance controls.
  • Familiarity with cloud security and access controls, including IAM, encryption, and audit logging.
  • Proven ability to lead technical workstreams, mentor junior staff, and collaborate across cross-functional and matrixed teams.
  • Preference will be given to candidates located in the DMV.
  • Travel may be up to 25-50% for candidates not located in the DMV.

What Would Be Nice to Have:
  • Experience building APIs for and/or working with entity validation/entity resolution solutions.
  • Experience with API gateways (Apigee, Kong, Azure API Management, AWS API Gateway).
  • Experience with Python and SQL (including SQL Server).
  • Previous experience working with federal agencies or government environments, including familiarity with security, compliance, and data governance requirements.
  • Previous experience working with LexisNexis (or other similar third-party data provider) products via API endpoints and integrating data into solution environment(s).
  • Experience working in a consulting environment and/or delivering solutions in a matrixed organization.
  • Experience supporting training, user enablement, and scaling of technical capabilities across teams or organizations.
  • Experience building AI/ML-enabled data products, particularly those leveraging unstructured data (e.g., NLP, document processing, image-based analytics).
  • Familiarity with ontology-driven applications, graph-based data modeling, and relationship analytics.
  • Experience implementing role-based access control (RBAC) and auditability compliance.
  • Relevant certifications or equivalent demonstrated expertise.
  • Experience with fraud and/or FinCrime data and monitoring systems.
  • Hands-on experience with financial crime compliance technology and data solutions, e.g., Oracle Mantas, Actimize, Fircosoft, LexisNexis Bridger, World-Check, Dow Jones, Chainalysis, Elliptic, TRM Labs, etc.

The annual salary range for this position is $130,000.00-$216,000.00. Compensation decisions depend on a wide range of factors, including but not limited to skill sets, experience and training, security clearances, licensure and certifications, and other business and organizational needs.
What We Offer:
Guidehouse offers a comprehensive, total rewards package that includes competitive compensation and a flexible benefits package that reflects our commitment to creating a diverse and supportive workplace.
Benefits include:
  • Medical, Rx, Dental & Vision Insurance
  • Personal and Family Sick Time & Company Paid Holidays
  • Position may be eligible for a discretionary variable incentive bonus
  • Parental Leave and Adoption Assistance
  • 401(k) Retirement Plan
  • Basic Life & Supplemental Life
  • Health Savings Account, Dental/Vision & Dependent Care Flexible Spending Accounts
  • Short-Term & Long-Term Disability
  • Student Loan PayDown
  • Tuition Reimbursement, Personal Development & Learning Opportunities
  • Skills Development & Certifications
  • Employee Referral Program
  • Corporate Sponsored Events & Community Outreach
  • Emergency Back-Up Childcare Program
  • Mobility Stipend

About Guidehouse
Guidehouse is an Equal Opportunity Employer-Protected Veterans, Individuals with Disabilities or any other basis protected by law, ordinance, or regulation.
Guidehouse will consider for employment qualified applicants with criminal histories in a manner consistent with the requirements of applicable law or ordinance including the Fair Chance Ordinance of Los Angeles and San Francisco.
If you have visited our website for information about employment opportunities, or to apply for a position, and you require an accommodation, please contact Guidehouse Recruiting at 1-571-633-1711 or via email at RecruitingAccommodation@guidehouse.com. All information you provide will be kept confidential and will be used only to the extent required to provide needed reasonable accommodation.
All communication regarding recruitment for a Guidehouse position will be sent from Guidehouse email domains including @guidehouse.com or guidehouse@myworkday.com. Correspondence received by an applicant from any other domain should be considered unauthorized and will not be honored by Guidehouse. Note that Guidehouse will never charge a fee or require a money transfer at any stage of the recruitment process and does not collect fees from educational institutions for participation in a recruitment event. Never provide your banking information to a third party purporting to need that information to proceed in the hiring process.
If any person or organization demands money related to a job opportunity with Guidehouse, please report the matter to Guidehouse's Ethics Hotline. If you want to check the validity of correspondence you have received, please contact recruiting@guidehouse.com. Guidehouse is not responsible for losses incurred (monetary or otherwise) from an applicant's dealings with unauthorized third parties.
Guidehouse does not accept unsolicited resumes through or from search firms or staffing agencies. All unsolicited resumes will be considered the property of Guidehouse and Guidehouse will not be obligated to pay a placement fee.

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