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Contractual Api Developer Jobs in Virginia (NOW HIRING)

GDIT

Backend API Developer

Arlington, VA · On-site

$119K - $161K/yr

Yes Position Summary The Backend API Developer builds and operates the service layer behind an ... Rather, salary will be set based on experience, geographic location and possibly contractual ...

Steampunk

Integration Developer

Mclean, VA · On-site +1

$100K - $160K/yr

Versed with API Gateways (i.e., Kong, Apigee, etc.) and authentication providers such as OKTA ... limited to geographic location, contractual requirements, education, knowledge, skills ...

Steampunk

Integration Developer

Mclean, VA · On-site +1

$100K - $160K/yr

Versed with API Gateways (i.e., Kong, Apigee, etc.) and authentication providers such as OKTA ... limited to geographic location, contractual requirements, education, knowledge, skills ...

Steampunk

Integration Developer

Mclean, VA · On-site

$125 - $150/hr

Versed with API Gateways (i.e., Kong, Apigee, etc.) and authentication providers such as OKTA ... limited to geographic location, contractual requirements, education, knowledge, skills ...

Steampunk

Integration Developer

Mclean, VA · On-site

$100K - $160K/yr

Versed with API Gateways (i.e., Kong, Apigee, etc.) and authentication providers such as OKTA ... 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 ...

Steampunk

Integration Engineer

Mclean, VA · On-site

$125 - $150/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 ...

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 ...

VTG

Software Developer (Python)

Herndon, VA · On-site

$180K - $230K/yr

Knowledge of RESTful API development and integration * Understanding of Linux/Unix operating system ... include contractual requirements which may cause an offer to fall outside of this range.

VTG

Software Developer (Python)

Herndon, VA · On-site

$180K - $230K/yr

Knowledge of RESTful API development and integration * Understanding of Linux/Unix operating system ... contractual requirements which may cause an offer to fall outside of this range.

Dev Technology

DevOps Engineer

Ashburn, VA · Hybrid

$100K - $125K/yr

Experience with tools such as Git, Gitlab, Maven/Gradle, Nodejs, npm, REST API / curl, jq ... Offered salary is based on experience, geographic location, and possibly contractual requirements ...

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Contractual Api Developer information

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.

What are the most commonly searched types of Api Developer jobs in Virginia?

The most popular types of Api Developer jobs in Virginia are:

What are popular job titles related to Contractual Api Developer jobs in Virginia?

For Contractual Api Developer jobs in Virginia, the most frequently searched job titles are:

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The top searched job categories for Contractual Api Developer jobs in Virginia are:

What cities in Virginia are hiring for Contractual Api Developer jobs?

Cities in Virginia with the most Contractual Api Developer job openings:

Contractual Api Developer jobs near you

Backend API Developer

GDIT

Arlington, VA • On-site

$119K - $161K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

This job post has expired today. Applications are no longer accepted.

Key responsibilities

  • Build and operate independently deployable backend services behind an operator application, maintaining interface contracts, versioning, and backward compatibility.

  • Integrate with upstream services via REST and streaming interfaces, ensuring accurate view state and coordinating payload and interface changes.

  • Deliver real-time updates using server-sent events and WebSocket streams, managing connection lifecycle, authentication, backpressure, and reconnection.

General Dynamics Information Technology rating

7.8

Company rating: 7.8 out of 10

Based on 63 frontline employees who took The Breakroom Quiz

89th of 226 rated it services

Job description

Type of Requisition:

Regular

Clearance Level Must Currently Possess:

None

Clearance Level Must Be Able to Obtain:

None

Public Trust/Other Required:

NACI (T1)

Job Family:

Data Science and Data Engineering

Job Qualifications:

Skills:

Back-End Development, Building Operations, Cloud Delivery, Design Development, Network Gateway

Certifications:

None

Experience:

8 + years of related experience

US Citizenship Required:

Yes

Job Description:

Position Summary
The Backend API Developer builds and operates the service layer behind an operator application in a cyber command center supporting national cyber defense across Critical Infrastructure and government partners. Responsibilities focus on lowlatency service delivery, correctness under load, and strict entitlement enforcement.

Key Responsibilities

Service Design & Development
Build and operate independently deployable services behind the application.
Maintain interface contracts, versioning, and backward compatibility.
Implement consistent request handling, validation, errors, authentication, and authorization.
Create automated tests for service behavior and contract compliance.

Upstream Integration & View State
Integrate with upstream services via REST and streaming interfaces.
Maintain accurate, consistent view state and ensure clients connecting midstream receive a complete picture.
Coordinate payload and interface changes with upstream service owners.

Real-Time Delivery
Deliver updates using server-sent events and WebSocket streams.
Manage connection lifecycle, authentication, backpressure, reconnection, and catchup.
Sustain large numbers of concurrent longlived connections without degradation.

Authorization & Content Filtering
Enforce role and attribute-based authorization serverside.
Implement content filtering so users receive only authorized data.
Test entitlement enforcement and maintain audit logs of all deliveries.

Event-Triggered Services
Build and operate event-triggered functions for routing, downstream actions, and notifications.
Integrate with managed messaging services.
Ensure triggered actions are idempotent, observable, and safely retried.

Performance, Reliability & Operations
Design and validate services for low-latency, high-throughput use.
Instrument services for monitoring, diagnosis, and production incident response.
Deploy through established pipelines into containerized environments.
Maintain required training and certifications; report certification status monthly.

Collaboration
Collaborate with front-end engineers on service contracts.
Work with platform teams on configuration, scaling, secrets, and deployment.
Participate in sprint planning, demos, and reviews.

Required Qualifications
Experience building and operating production service interfaces at scale.
Experience integrating with upstream services and maintaining derived state.
Knowledge of push/streaming delivery, connection lifecycle, and backpressure.
Experience with server-side authorization models.
Experience with containerized deployment and cloud environments.
Experience instrumenting services and supporting production incidents.
BS in computer science or engineering and 8+ years relevant experience (or equivalent).
Public Trust eligibility and U.S. citizenship.
On-site work in the Washington, D.C. metro area (not remote or hybrid).

Preferred Qualifications
Experience with streaming platforms (Kafka, MSK, Event Hubs).
Experience with API gateways or service meshes.
Experience with serverless functions (Lambda, Azure Functions).
Experience supporting latencysensitive operational systems.
Experience delivering software in regulated environments.
Current cloud developer/associate certification.


GDIT Is Your Place
At GDIT, the mission is our purpose, and our people are at the center of everything we do.
Growth: AI-powered career tool that identifies career steps and learning opportunities
Support: An internal mobility team focused on helping you achieve your career goals
Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off
Community: Award-winning culture of innovation and a military-friendly workplace
Own Your Opportunity
Explore a career in data science and engineering at GDIT and you'll find endless opportunities to grow alongside colleagues who share your determination for solving complex data challenges.

The likely salary range for this position is $119,000 - $161,000. 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.

Scheduled Weekly Hours:

40

Travel Required:

Less than 10%

Telecommuting Options:

Onsite

Work Location:

USA VA Arlington

Additional Work Locations:

Total Rewards at GDIT:

Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

Our Identity Verification Process:

As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.

About Our Work:

We are GDIT. 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. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.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

What General Dynamics Information Technology employees say

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About General Dynamics Information Technology

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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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