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Api Developer Jobs in Countryside, VA, US

1,000+ api developer jobs from 400+ companies hiring in Countryside, VA, US.

All jobs in Countryside, VA, USApi Developer Jobs in United States
Nearby:Sterling·Sugarland Run·Ashburn·Herndon·Lowes Island·Reston·Dranesville·Great Falls·Oak Hill·North Potomac·Leesburg·Washington·South Riding·Chantilly·Germantown·Potomac·Gaithersburg·Oakton·Centreville
1,029 jobs- Countryside • 50 miles
6d
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Software Developer
Adelphi, Maryland, United States
OnsiteFull Time
Tyto Athene
Tyto Athene: Provides IT services and digital transformation for government agencies.
10+ YOEBachelor's degree or 3 years of relevant experience; 10+ years software development; proficient in Python, PHP, JavaScript, C/C++, and/or Java; Elasticsearch/PostgreSQL; Linux; secure SDLC; ML/AI; web frameworks; Git/CI/CD; Atlassian tools; REST APIs; Docker/Kubernetes; ITIL Foundations; TS/SCI clearance.
Python, PHP, JavaScript, C/C++, Java, Elasticsearch, PostgreSQL, Docker, Kubernetes, Laravel, NodeJS, React, Angular, Git, BitBucket, CI/CD, JIRA, Confluence, RESTful API, REST API, Linux
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2w
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Platform Developer (Power Platform & ServiceNow)
Arlington, Virginia, United States
HybridFull Time
ASI Government
ASI Government: Provides acquisition and program management consulting to federal agencies.
3+ YOE3–5 years enterprise app development on low-code/no-code platforms; Power Apps, ServiceNow, SharePoint; REST APIs and Power Automate; eligible for Public Trust clearance.
Power Platform, ServiceNow, SharePoint, Power Automate, REST API, Python, JavaScript
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1mo
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Full Stack Developer
Arlington or United States
$115k-$160k/yr RemoteFull Time
DocMe360
DocMe360: Delivering digital strategy and clinical AI solutions for government.
4+ YOE4–6+ years full stack exp; end-to-end enterprise app development; agile; frontend React/Sencha ExtJS; Python/Java; REST APIs; AWS; Docker; QA/healthcare domain knowledge.
React, Sencha Ext JS, Java, Python, Jakarta EE, WildFly, Quartz, JWT, FastAPI, REST API, AWS, Docker, Maven, Git, DataDog, DynaTrace, JUnit, Mockito
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1w
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Database Engineer/ Developer II
Alexandria, Virginia, United States
$130k-$145k/yr OnsiteFull Time
KBR
KBRNYSE: KBR: Provides engineering, technology, and professional services for global markets.
4+ YOEActive Secret clearance; Bachelor’s degree in data science, computer science, statistics, mathematics, or related field; 4 years of agile data/database engineering experience with APIs, data flows, and large datasets; SQL proficiency.
SQL, DBMS, APIs
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2mo
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Full Stack Developer
Baltimore, Maryland, United States
$124k-$170k/yr RemoteFull Time
Index Analytics
Index Analytics: Delivers data strategy and IT solutions to federal health agencies.
3+ YOEBachelor's degree or equivalent experience; 3 years in similar role; proficient in Java/Go/Python; API development platforms; AWS; API-first; Agile.
Java, Go, Python, AWS, API Gateway, Apigee, Kong, CMS, Snowflake, Databricks, CloudFormation, Jenkins
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1mo
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Python Software Developer - Computer Vision
McLean, Virginia, United States
$25-$65/hr RemoteFull Time
USG SaaS
USG SaaS: Develops custom software and cloud systems for government organizations.
3+ YOE3+ years software development for shipping products; proficient in C/C++, Swift a plus; OO design; API development; CV/ML passion; self-motivated; strong problem solving and communication; GPU/SoC acceleration bonus.
C/C++, Swift, APIs, GPU acceleration, SoC acceleration
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1w
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Python Developer
Bethesda, Maryland, United States
$73k-$149k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
3+ YOESecret clearance, Bachelor's degree, 3+ years Python development, 3+ years software engineering, Flask/Django experience, Linux development, Oracle development, Ada willingness.
Python, Flask, Django, REST API, Git, GitLab, GitHub, Jenkins, Vue.js, JavaScript, Linux, Oracle, Ada
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2mo
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Blockchain Developer
Manassas, Virginia, United States
$101k-$188k/yr OnsiteFull Time
Swift
Swift: Secure global financial messaging network for banks and institutions.
3+ YOE3+ years as a Blockchain Developer; strong knowledge of DLT platforms; degree in CS/Software Engineering; proficient in multiple languages; cloud and API experience.
Solidity, Go, Kotlin, JavaScript, TypeScript, Python, Java, C++, AWS, Azure, Google Cloud, Docker, Kubernetes, REST APIs, gRPC, Git, CI/CD
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3w
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Java Developer
Washington, District of Columbia, United States
OnsiteFull Time
IntelliDyne
IntelliDyne: Provides IT consulting and technology solutions to government agencies.
5+ YOESecret clearance, TS eligibility; 5+ years Java development; Bachelor's in CS/IT/Software Engineering; strong Java, OOP, Spring/Spring Boot, Hibernate/JPA; API development and security with government/commercial systems.
Java, Spring, Spring Boot, Hibernate, JPA, REST, Eclipse IDE, SQL Server, T-SQL, Git, CI/CD, .NET (preferred), C#, VB, OOP
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2mo
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Appian Developer
Alexandria, Virginia, United States
OnsiteFull Time
Lawelawe Technology Services
Lawelawe Technology Services: Provides IT and program management services for federal agencies.
4+ YOEAppian Lead Developer with 4+ years, Appian Lead Developer certification, strong integration, and Agile experience.
Appian, JavaScript, HTML, CSS, Web APIs, RDBMS
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2mo
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Software Engineer
Vienna or Herndon
HybridFull Time
NT Concepts
NT Concepts: Provides AI and data solutions for national security agencies.
5+ YOE5+ years in software development with Python/Java/C#, ML with PyTorch; API design; cloud (AWS/GCP/Azure); Linux; Git; microservices; containers (Docker/OpenShift); Kubernetes; SAFe/Agile experience; TS/SCI clearance preferred.
Python, Java, C#, Go, PyTorch, APIs, AWS, GCP, Azure, Linux, Git, Docker, OpenShift, Kubernetes, REST APIs
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2w
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Software Engineer - .NET / APIS
Reston, Virginia, United States
OnsiteFull Time
Securiport
Securiport: Provides biometric and big data solutions for global border security.
3+ YOE3–5 years backend software engineering; strong C#/.NET; APIs and microservices; relational databases; CI/CD; cloud platforms; GitHub.
C#, .NET, APIs, REST, gRPC, SQL Server, MySQL, GitHub, Azure DevOps, Jenkins, Docker, Kubernetes, Kafka, RabbitMQ, IBM MQ, AWS, Azure, React, JavaScript, TypeScript
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1d
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Backend Developer (St. Louis, MO / Springfield, VA)
Alexandria or Springfield or St. Louis
$75k-$200k/yr OnsiteFull Time
geocgi
geocgi: Providing specialized geospatial information systems (GIS) and IT services.
3+ YOEBackend service/API development, REST APIs, cloud/on-prem deployments, containerization, and security for geospatial platforms.
Python, JavaScript, Node.js, Java, Docker, Kubernetes, ArcGIS Enterprise, REST APIs, CI/CD, Scripting, Infrastructure as Code
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1mo
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Senior .NET Developer
Washington, District of Columbia, United States
$135k-$165k/yr OnsiteFull Time
Evolver
Evolver: Provides cybersecurity and IT solutions for government and enterprise.
13+ YOEMaster's degree in CS or related field with 13+ years of experience; SCRUM Master; 10+ years C# web development; 5+ years front-end and SPA frameworks; REST API; .NET Core; TDD; must pass USCP background check.
C#, .NET Core, SQL Server, Oracle, Java, JavaScript, AJAX, JSON, CSS, XHTML, React, Vue, Angular, Blazor, jQuery, REST API, TDD, Visual Studio, VS Code, Azure DevOps, IIS, SQL Server Management Studio, Bootstrap, Material UI, NPM, WebPack, LESS, SASS, Entity Framework Core
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1mo
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Web Developer
Annapolis Junction, Maryland, United States
$144k-$210k/yr HybridFull Time
Boeing Intelligence & Analytics
Boeing Intelligence & AnalyticsNYSE: BA: Provides intelligence analytics and cyber solutions for national security.
8+ YOEActive TS/SCI clearance with polygraph; 8+ years web development; HTML, CSS, JavaScript; REST APIs; SDLC; Agile; Jira/Confluence; 508 accessibility.
HTML, CSS, JavaScript, React, Angular, Vue, REST APIs, Jira, Confluence, AWS, Docker, Kubernetes, Node.js, Java, Linux scripting, Git
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1w
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Backend & Database Engineer
Columbia, Maryland, United States
$120k-$130k/yr HybridFull Time
Stage Front
Stage Front: A technology platform providing ticketing inventory management and distribution solutions.
3+ YOE3-5 years backend software development with C#, .NET Core; strong SQL Server; API design; CI/CD; Git; performance tuning; excellent communication.
C#, .NET Core, SQL Server, T-SQL, Git, CI/CD, Azure, API Design
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5d
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Senior Java Developer
Sterling, Virginia, United States
$125k-$145k/yr HybridFull Time
Laansu
Laansu: Provides IT services and software development for federal agencies.
5+ YOESenior full stack developer with 5-10 years in software development; strong Java, web apps/APIs, AWS, ORM, CI/CD, Docker, Angular/TypeScript; leadership and mentoring experience.
AWS, Docker, Git, Angular, TypeScript, Bootstrap, Hibernate, JPA, ECS, RDS, Jenkins, CI/CD, HTML, CSS
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2mo
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Software Developer in Arlington, Virginia, United States
Arlington, Virginia, United States
OnsiteFull Time
Tetra Tech
Tetra TechNASDAQ: TTEK: Provides engineering and consulting services for water and environmental projects.
10+ YOE10+ years full lifecycle software development in Windows, 7+ years .NET, BS in Software Engineering or CS, strong React, AWS, REST APIs, and client-facing work.
React, ASP.NET/.NET, Visual Studio, C#, Visual Basic, AWS, APIs, Jira, Git, MS SQL, Oracle, MS Access, Crystal Reports, IIS, Amazon Lex
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3w
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Software Integration Engineer
Annapolis Junction, Maryland, United States
$190k-$240k/yr OnsiteFull Time
Belay Technologies
Belay Technologies: Provides specialized technology and engineering services to the DoD.
12+ YOETS/SCI with polygraph; Bachelor's + 12 years software development/engineering, or 16 years of experience in lieu of degree; proficiency in cshtml, Java, SQL, APIs; experience with COTS and documentation.
cshtml, Java, SQL, APIs, Microsoft IIS, SQL Server Management Studio
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3w
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Application Engineer (Databricks Apps | React + TypeScript)
Reston, Virginia, United States
RemoteFull Time
Acuity
Acuity: Provides digital strategy and technology consulting for federal agencies.
5+ YOE5+ years software development experience; strong React and TypeScript; Databricks/Spark and cloud data platforms; API integration; secure, scalable apps.
React, TypeScript, Databricks, Spark, Python, APIs
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2w
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Lead Software Engineer
Carmel Office or Remote US Virgin Islands or Remote, United States
$110k-$135k/yr HybridFull Time
Bonterra
Bonterra: Provides software for fundraising, case management, and corporate philanthropy.
5+ YOE5+ years full-stack development; Go backend; Angular frontend; microservices; REST APIs; Kubernetes/Docker; OpenAPI; AWS; AI tooling; strong problem-solving; leadership experience.
Go, Angular, TypeScript, REST API, OpenAPI/Swagger, MySQL, Docker, Kubernetes, Helm, CI/CD, AWS, Ginkgo, Jest, Cypress, Mage, JWT, OAuth
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1mo
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Software Engineer Level 4
Annapolis Junction, Maryland, United States
OnsiteFull Time
Base-2 Solutions
Base-2 Solutions: Delivers engineering and technology services for national security.
Backend developer with data engineering and API development; Python, FastAPI, PostgreSQL, Elasticsearch; TS/SCI with CI Poly.
Python, FastAPI, PostgreSQL, Elasticsearch
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2d
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Software Engineer
Herndon or Colorado Springs or Dayton
$95k-$195k/yr HybridFull Time
Auria
Auria: Engineering and software solutions for space and defense missions.
Develop software in Agile teams; Linux, microservices, REST APIs; Python/JavaScript; CI/CD; security clearance.
Python, JavaScript/React, RabbitMQ, REST APIs, CI/CD, GitHub, GitLab, Jira, Selenium, Behave, Sphinx
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1mo
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Software Engineer II/III
Washington, District of Columbia, United States
OnsiteFull Time
Warrant Technologies
Warrant Technologies: Provides engineering, logistics, and training services for defense programs.
3+ YOE3+ years of professional software engineering experience; experience in Agile, DevOps/DevSecOps; API development, automated testing and integration; Bachelor's or Master's in engineering or mathematics; active DoD Secret clearance or able to obtain.
Agile, DevOps, DevSecOps, APIs, Automated testing, Integration
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1mo
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Senior Software Engineer
Bethesda or Waltham
$140k-$220k/yr HybridFull Time
ZoomInfo
ZoomInfoNASDAQ: GTM: Provides B2B contact data and sales intelligence software.
5+ YOE5+ years software development; 3+ years RESTful APIs; strong Java (Spring Boot) and NestJS; OAuth 2.0; API design and security; API gateways and MCP experience.
Java, Spring Boot, Spring Security, Maven, Gradle, NestJS, OAuth 2.0, OpenAPI, Swagger, MCP, Kafka, Docker, Kubernetes, AWS, GCP, Azure
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2w
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Senior ServiceNow Developer
Chantilly, Virginia, United States
$180k-$230k/yr OnsiteFull Time
Synergy ECP
Synergy ECP: Provides cybersecurity and systems engineering for defense agencies.
6+ YOE6–10 years ServiceNow development; JavaScript, Glide API; REST/SOAP; CMDB; DoD/IC experience; TS/SCI clearance; US Citizenship.
ServiceNow, JavaScript, Glide API, Script Includes, Business Rules, Client Scripts, UI Policies, Flow Designer, Integration Hub, REST, SOAP, MID Server, JDBC, CMDB, Discovery, Service Portal, AngularJS, HTML, CSS, Bootstrap
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2w
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Software Developer
Chantilly or Bowie
$80k-$128k/yr OnsiteFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
5+ YOEU.S. citizenship; ability to obtain/maintain Public Trust; degree with experience (see details); cloud and software development experience; REST APIs and microservices; Agile/DevSecOps; FAA/NAS familiarity desired.
AWS, Azure, GCP, Java, Python, C#, REST APIs, Docker, Kubernetes, Terraform, CloudFormation, ARM templates, DevSecOps, CI/CD, Relational databases, NoSQL, Agile
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2w
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CMS Full Stack Developer (cloud certified)
Washington, District of Columbia, United States
RemoteContract, Full Time
Insomniac Design
Insomniac Design: Digital agency providing human-centered design and technology solutions.
5+ YOE5+ years Drupal development, 7+ years software development, 3+ years Drupal modules, 2+ years REST API, PHP/HTML/CSS/JS, AWS cloud certification required, Drupal certification preferred.
PHP, Drupal, HTML, CSS, JavaScript, REST API, Git, SQL
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2mo
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Senior Software Engineer
Bethesda, Maryland, United States
$140k-$235k/yr HybridFull Time
Absolute Business Solutions Corp
Absolute Business Solutions Corp: Provides intelligence analysis and technology solutions to defense agencies.
4+ YOETS/SCI clearance; Bachelor’s 4-8 yrs or Master’s 2-6 yrs; C#; API development; SQL Server; ETL; microservices; DevOps tools; AWS; Docker; AI/ML knowledge.
C#, API development, SQL Server, ETL, microservices, Docker, DevOps, GitLab, Jenkins, AWS, Lambda, GraphQL, Python, Bash, Apache NiFi, Kafka, Linux
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1mo
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Full Stack Engineer
Chantilly or McLean
OnsiteFull Time
Raft
Raft: Builds AI and data platforms for U.S. national defense.
2+ YOE2+ years full stack experience; backend in Java or Go; frontend React; Docker/Kubernetes; DevSecOps; cloud-native microservices; security best practices; API development; experience with Agentic AI tools.
Docker, Kubernetes, Java, Golang, React, APIs, Agentic AI tools
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13h
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Software Engineer
Columbia or Minneapolis
$87k-$124k/yr HybridFull Time
Computershare
ComputershareASX: CPU: Global provider of financial administration and shareholder management services.
Strong Java, React, REST APIs experience; familiar with container platforms and Agile development; hybrid office work arrangement.
Java, React, REST APIs, OpenShift
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2mo
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Software Developer
Stafford, Virginia, United States
OnsiteFull Time
ECS
ECSNYSE: ASGN: Provides advanced technology and engineering solutions for federal agencies.
1+ YOEUS citizen with active Secret clearance; 1+ years software development experience with C#/.NET; unit tests; SQL Server; HTML/CSS; REST APIs; Agile/SCRUM; CI/CD tools.
C#, HTML, Blazor, Entity Framework, NUnit, xUnit, SQL Server, REST APIs, Azure DevOps, Jenkins, GitHub
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1mo
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Software Developer
Springfield, Virginia, United States
$118k-$201k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Designs and manufactures advanced defense and aerospace systems.
3+ YOEBachelor’s degree in CS/IS/Engineering; at least 3 years development experience; proficiency in Python, Java, Perl, Angular, HTML/CSS, XML, Tomcat/Solr, Oracle, Postgres; experience in cloud and REST APIs.
Python, Java, Perl, Angular, HTML, CSS, XML, Apache Tomcat (Solr), Alfresco, Oracle, Postgres, REST APIs, AWS
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1mo
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Software Developer
Chantilly, Virginia, United States
OnsiteFull Time
Evans & Chambers Technology
Evans & Chambers Technology: Develops technology solutions and software for national defense missions.
16+ YOEActive TS/SCI clearance with Polygraph; Bachelor’s degree and 16+ years of software development experience; strong OO programming; web apps and backend services; AWS & REST APIs; SQL; Agile teamwork.
AWS, REST, SQL, Git, IBM BPM, IBM BAW
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4d
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Application Developer
Tampa or Cleveland or Sarasota or Arlington or Nashville or Milwaukee or Dearborn or Orlando or Charlotte
OnsiteFull Time
Intertape Polymer Group
Intertape Polymer Group: Produces industrial tapes, films, and automated packaging equipment.
0+ YOEBachelor's in computer science, IT, software engineering, or related field; foundational programming experience; basic knowledge of C#/.NET, JavaScript/TypeScript, Python; introductory Azure and Power Platform concepts; APIs, databases, Git; strong teamwork and willingness to learn.
C# / .NET, JavaScript / TypeScript, Python, Azure, Power Platform, APIs, Databases, Git, Azure DevOps
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2mo
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Software Developer
Chantilly, Virginia, United States
OnsiteFull Time
J5 Consulting
J5 Consulting: Providing specialized cybersecurity and IT consulting for federal agencies.
Experienced software developer with CI, AWS, Java and React, Agile, testing, and modern web architectures.
AWS, Java, React, CI/CD, Automated Testing, APIs, SOPs
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3mo
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Back-End Engineer
Washington, District of Columbia, United States
$130k-$190k/yr HybridFull Time
Nitra
Nitra: Sues business credit cards and financial software for doctors.
5+ YOEBackend engineer with 5+ years experience in JavaScript, Node.js, Express.js, APIs, PostgreSQL; design APIs and databases; implement features; collaborate with stakeholders.
JavaScript, Node.js, Express.js, APIs, PostgreSQL, Architecture
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2w
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Front End Developer - Public Sector
Huntsville or McLean
HybridFull Time
Exiger
Exiger: AI-powered supply chain risk and compliance management software.
3+ YOEFront-end developer with React/Angular/Vue experience; build dashboards and data visualizations for government-aligned supply chain initiatives; strong UX/UI and API integration skills; US citizenship and Top Secret/SCI eligibility.
React, Angular, Vue, JavaScript, TypeScript, HTML, CSS, D3.js, Chart.js, APIs
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3mo
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Software Developer
Chantilly, Virginia, United States
$170k-$190k/yr OnsiteFull Time
Amentum
AmentumNYSE: AMTM: Provides engineering and technical services for government mission support.
5+ YOEFront-End Developer with HTML5, CSS3, JavaScript/TypeScript; experience with Angular/React/Vue; REST APIs; Git; Agile; TS/SCI with Poly clearance; Bachelor’s in CS or related field; 5 years experience.
HTML5, CSS3, JavaScript, TypeScript, Angular, React, Vue.js, RESTful APIs, Git
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3w
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Sr. FS Software Engineer - Hybrid
Louisville or Fort Lauderdale or Frisco or Nashville or New York City or Chicago or Washington
$107k-$147k/yr HybridFull Time
Humana
HumanaNYSE: HUM: Provides health insurance plans and clinical healthcare services.
5+ YOE5-8+ years full-stack software development; strong Node.js, React, TypeScript, REST API skills; production web apps; Azure cloud; Agile/Scrum; able to collaborate cross-functionally.
Node.js, React.js, TypeScript, REST API, Git, Docker, CI/CD, Microservices, WASM, Azure, Agile/Scrum
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HiringCafe market data

Api Developer Jobs market signals in Countryside, VA, US

These signals come from live HiringCafe job inventory, not a static article. Use them to compare the market, then open listings above to apply directly.

Open jobs
1,000+
Hiring companies
400+
Fresh sample
59% new in 30d
Salary visibility
59% show pay

Companies appearing in this market

Base-2 SolutionsCACIECSHumanaIntelliDynePeratonRaftSecuriport

Work location mix in visible results

Onsite: 47Hybrid: 22Remote: 11