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48 associate junior software engineer jobs at 30 companies in Leesburg, VA

1mo
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Senior Associate Software Engineer
Manassas, Virginia, United States
OnsiteFull Time
VTG
VTG: Provides engineering and digital modernization solutions for national security.
2+ YOE2+ years experience; Bachelor's (or Master's) in systems/computer/software engineering or IT; experience with Java, C++, Python, Git, Linux, Docker; US citizen with current or eligible SECRET clearance; strong communication skills.
Java, C++, Python, Git, Linux, RHEL 8, RHEL 9, Docker, Kubernetes, Podman, KVM, Helm, Jenkins, Ansible, GitOps, Nexus, Robot Framework
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2w
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Associate Software Engineer
Fort Meade, Maryland, United States
$77k-$128k/yr OnsiteFull Time
ManTech
ManTech: Provides technology solutions for defense and intelligence agencies.
0+ YOEBachelor's in CS or related,0–2 years software development experience or internships,knowledge of Python/Java/JavaScript/C/C++,EMR not mentioned,active TS/SCI with polygraph required.
Python, Java, JavaScript, C/C++, AWS, Docker, Kubernetes, React, Angular
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1mo
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Software Engineer, Associate II
McLean, Virginia, United States
$85k-$127k/yr OnsiteFull Time
Freddie Mac
Freddie MacOTCQB: FMCC: Purchases and securitizes home mortgages for the secondary market.
1+ YOE1-3 years software engineering experience; college degree or equivalent preferred; AWS cloud experience (ECS/EKS, Lambda, EC2, RDS, DynamoDB, S3, IAM, CloudWatch; CloudFormation/CDK/Terraform); CI/CD and SDLC practices; observability and production support; strong communication skills.
AWS, ECS, EKS, Lambda, EC2, RDS, DynamoDB, S3, IAM, CloudWatch, CloudFormation, CDK, Terraform, CI/CD, Docker, Kubernetes
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2w
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2027 Global Technology - Associate Software Engineer
Baltimore or Maryland or Colorado or Washington or Washington or New York or California or United States
$78k-$165k/yr HybridFull Time
T. Rowe Price
T. Rowe PriceNASDAQ: TROW: Global investment management firm providing funds and retirement services.
Full-time student graduating Dec 2025–May/June 2026, minimum 3.0 GPA, major in CS/Statistics/Math/Engineering, competency in at least one programming language, familiar with modern software methodologies (e.g., Scrum).
Java, JavaScript, Python, SQL, Git, CI/CD, Docker, iOS/Swift, Android/Java, Apple Testflight, Google Firebase, Amazon Web Services, Linux, Machine learning
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1mo
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Senior Associate Software Engineer
Manassas, Virginia, United States
OnsiteFull Time
VTG
VTG: Provides force modernization and digital transformation for defense agencies.
2+ YOE2+ years experience, US citizen with Secret clearance, bachelor\u0002s or master\u0002s in related field, experience with Java/C++/Python, Git, Linux and Docker, RHEL, strong communication and troubleshooting skills.
Java, Python, C++, Git, Linux, Docker, RHEL 8, RHEL 9, Kubernetes, Podman, KVM, Helm, Jenkins, Ansible, GitOps, Nexus, Robot Framework
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3w
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Software Engineer–Systems (Associate/Experienced)
Chantilly or Aurora or Mesa
$94k-$171k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, defense systems, and space technology.
1+ YOEActive U.S. Top Secret clearance, bachelor\u0002s degree, 1+ years systems/software engineering experience, familiarity with Agile/SAFe, and customer briefing skills.
Jira, Confluence, Crucible
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3w
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Software Engineer–Systems (Associate/Experienced)
Chantilly or Aurora or Mesa
$94k-$171k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
1+ YOEBachelor's degree or equivalent, active U.S. Top Secret clearance (willing to sit for CI polygraph),1+ years systems/software engineering experience, familiarity with Agile/SAFe, and customer briefing skills.
Jira, Confluence, Crucible, Microsoft Excel
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3w
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Associate Software Developer — Recent Graduates
Arlington, Virginia, United States
$50k-$80k/yr OnsiteFull Time
Spatial Front
Spatial Front: IT solutions and mission support for government agencies.
Bachelor's degree in a technical field, recent graduate or early-career, basic programming knowledge, strong problem-solving and communication, U.S. citizenship required, ability to work full-time onsite in Arlington, VA.
PeopleSoft, PeopleTools, PeopleCode, Application Engine, SQL, Java, JavaScript, TypeScript, Python, C++, C#, Artificial intelligence, AWS, ServiceNow, Esri, Git, Azure DevOps
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4d
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Associate, Software Engineering (39438)
Chantilly, Virginia, United States
$76k-$141k/yr OnsiteFull Time
L3Harris Technologies
L3Harris TechnologiesNYSE: LHX: Aerospace and defense providing mission-critical technology solutions.
Bachelor's in Computer Science or Electrical Engineering (pursuing or completed within last 12 months). Familiarity with C/C++/VC++, Linux/Windows development, software lifecycle, and OOD. Containerization or GPU experience a plus.
Linux, Windows, C, C++, VC++, Docker, Kubernetes, CUDA
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3w
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FLEX Associate Software Engineer - CDP
Bethesda, Maryland, United States
$32-$50/hr HybridFull Time
Marriott International
Marriott InternationalNASDAQ: MAR: Operates and franchises a global network of hotels and resorts.
0+ YOEBachelor's degree or equivalent,0–3 years relevant experience, knowledge of REST APIs/JSON, Python/Java/JavaScript, basic SQL, Adobe ecosystem exposure preferred, privacy/consent familiarity, strong communication.
REST APIs, JSON, Python, Java, JavaScript, Adobe Experience Platform (AEP), Adobe Real-Time Customer Data Platform, Adobe Launch (Tags), AEP Web/Mobile SDK, Adobe Target, SQL
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2w
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DevSecOps Research Computing Software Engineer
Reston, Virginia, United States
$69k-$103k/yr OnsiteFull Time
Penn State University
Penn State University: Provides higher education and conducts extensive academic research programs.
2+ YOEAbility to develop/deploy research software and Infrastructure-as-Code (Ansible/IaC), integrate with HPC and cloud, optimize performance, and obtain Secret-level clearance; associate+2 years or bachelor's (no prior required).
Ansible, Infrastructure as Code (IaC), CI/CD, HPC
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1w
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Single Family Software Engineering - Senior Associate
Plano or Reston
$123k-$161k/yr HybridFull Time
Fannie Mae
Fannie MaeOTCQB: FNMA: Providing liquidity and stability to the U.S. housing market.
2+ YOE2+ years software engineering experience; full-stack web development using Microsoft .NET/C# or Java/Spring, HTML/CSS/JavaScript, relational databases/SQL, Git and CI/CD; knowledge of secure development and vulnerability remediation; strong communication.
Microsoft .NET, C#, Java, Spring, MVC, Angular, HTML, CSS, JavaScript, SQL, Git, CI/CD, Terraform, AWS, GitHub Copilot, RESTful APIs
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4d
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2026 - Associate Cyber Software Engineer - Annapolis Junction MD
Annapolis Junction, Maryland, United States
$97k-$104k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Designs and manufactures advanced aerospace and defense systems.
Active TS/SCI with polygraph required, U.S. citizenship, STEM degree with 3.0+ GPA, experience with C#, C/C++, Java and/or Python, Agile development experience, strong problem-solving and collaboration skills.
C#, C/C++, Java, Python, Agile
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4d
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2026 - Associate Cyber Software Engineer - Annapolis Junction MD
Annapolis Junction, Maryland, United States
$97k-$104k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
Active TS/SCI with full-scope polygraph, U.S. citizenship, STEM bachelor's degree (GPA≥3.0), programming in C#, C/C++, Java or Python, Agile experience, and strong problem-solving and collaboration skills.
C#, C/C++, Java, Python, Agile, CNO
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2w
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Junior Appian Developer
Reston, Virginia, United States
$90k-$110k/yr RemoteFull Time
Forge Group
Forge Group: Provides professional consulting and IT solutions for federal agencies.
0+ YOEU.S. citizen with 0–3 years Appian or application development experience; Appian Associate certification within 6 months; CompTIA Security+ within 30 days; active Tier 2 background investigation within 18 months; foundational SQL, REST, and Appian knowledge.
Appian, SQL, REST, Python, Java, JavaScript, Git, CI/CD
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3w
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Associate AI/ML Software Developer (req-261)
Tysons, Virginia, United States
$99k-$120k/yr OnsiteFull Time
CATHEXIS
CATHEXIS: Provides consulting and technology services to federal government agencies.
0+ YOEActive Secret clearance required, bachelor’s in computer science or related, 0–3 years relevant experience, experience with JavaScript/Java/Python, OOP, data structures, algorithms, and modern LLM tool workflows.
JavaScript, Python, Java
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2mo
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Associate Application Engineer
McLean, Virginia, United States
OnsiteFull Time
Appian
AppianNASDAQ: APPN: Provides a low-code platform for enterprise-grade process automation.
Bachelor’s degree in Engineering/CS/Math or related field; AWS experience; strong problem-solving; proficient English; strong communication.
AWS, Appian
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Design Engineer Associate
Tysons, Virginia, United States
OnsiteFull Time
M.C. Dean
M.C. Dean: Design-build and systems integration for complex, mission-critical infrastructure.
0+ YOEBachelor's in Electrical Engineering required; 0+ years engineering experience. Must perform electrical calculations, medium-voltage design, PLC/ladder logic, 2D CAD/BIM, and use engineering software; CEM/CPQ/LC/CLEP/DBIA/INCOSE certifications preferred.
PLC, AGI32, ETAP, SKM, AutoCAD, AutoCAD Inventor, Revit, Microsoft Office, Microsoft SharePoint, EDMS, IMMS, Bluebeam
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2w
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Tax Innovation - Software Engineering - Senior Associate
Dallas or Chicago or Washington or New York City
$77k-$214k/yr OnsiteFull Time
PwC
PwC: Providing audit, tax, and management consulting services to businesses.
2+ YOEBachelor's degree and at least 2 years' experience; proficiency in Java, Python, C#.NET, JavaScript; experience with ATDD, CI/CD, APIs and microservices; strong communication and critical thinking.
Java, Python, C#.NET, JavaScript, Acceptance Test Driven Development (ATDD), CI/CD, API, microservices
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3d
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Associate Appian Developer
Largo or Dayton or Washington
RemoteFull Time
Graham Technologies
Graham Technologies: Provides secure IT services and modernization solutions.
1+ YOEBachelor's degree required; 1+ years software development; experience with Appian or low-code platforms, Agile, APIs and integrations; ability to obtain Public Trust; Appian Certified Associate Developer preferred.
Appian, REST, AWS, Azure
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