Python Test Software Developer Jobs in Fredericksburg, VA, US

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Software Development Engineer in Test (SDET)

Arlington, Virginia, United States

OnsiteFull Time

Zetier: Cybersecurity engineering for defense and intelligence missions.

5+ YOE5+ years in software development or test; strong Python/C/C++/Rust; automated test frameworks; embedded/Linux; CI/CD; HW/SW debugging; documentation; strong communication; active U.S. security clearance.

Python, C/C++, Rust, pytest, Robot, Docker, Kubernetes, QEMU, Wireshark, Scapy, CI/CD, Firmware testing, Linux

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Cyber Software Test Engineer

Chantilly, Virginia, United States

OnsiteFull Time

SAICNYSE: SAIC: Provides engineering, IT, and mission support services to government.

5+ YOEActive Secret security clearance or higher; Bachelor's degree with 5-8+ years, Master's with 6 years, PhD with 4 years, or 12 years of experience in lieu of a degree; experience in software/hardware testing; strong test planning and communication skills.

Python, JavaScript, Azure DevOps, Jira, TestComplete, UNIX command line

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Software Developer in Test (SDET)

Ashburn, Virginia, United States

RemoteFull Time

Syms Strategic Group: Provides IT and professional services to federal government agencies.

10+ YOEStrong programming in C#, Java, or Python; experience in software testing; familiar with SDLC/Agile; US citizenship and Public Trust clearance; remote work.

Selenium, TestNG, JUnit, QTP, LoadRunner, GitHub Actions, JIRA, SQL, JMeter, Gatling

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Mission Systems Software Test Engineer II

Reston, Virginia, United States

OnsiteFull Time

Blue Origin: Develops reusable rockets and systems for human spaceflight.

BS in engineering or physics; software testing experience; space systems knowledge; programming in Python/Golang/Rust/C++ ; cloud experience; strong communication.

AWS, Azure, Confluence, JIRA, Git, Python, Golang, Rust, C++

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Staff Cyber Software Test Engineer

Chantilly, Virginia, United States

$161k-$241k/yr OnsiteFull Time

Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.

12+ YOEActive Secret clearance required; BS with 12+ yrs, MS with 10 yrs, or PhD with 8 yrs; experience in software/hardware testing; strong analysis and communication skills.

Python, JavaScript, Jira, Azure DevOps, TestComplete, UNIX, Android, Windows, Linux

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Python Engineer, Agentic AI

Washington or Philadelphia

$121k-$181k/yr HybridFull Time

ComcastNASDAQ: CMCSA: Provides global telecommunications, media content, and entertainment services.

2+ YOEProficient in Python with backend focus, testing, and Agile collaboration; experience with AI agent workflows and RESTful services.

Python, Git, CI/CD, pytest, REST APIs, FastAPI, Docker, Asyncio

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Principal Software Engineer for Integration & Test

Arlington or Dayton or Remote or Woburn

$206k-$284k/yr HybridFull Time

Systems & Technology Research: Develops advanced technology for national security and defense applications.

5+ YOELead real-time software development for RF sensor systems; open architecture, C/C++, MATLAB/Python prototypes, travel ~20%, security clearance required.

C++, Python, MATLAB, CUDA, OpenCL, Linux, Embedded systems, CI/CD, Containerization

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Test Engineer

Tysons, Virginia, United States

$82k-$153k/yr OnsiteFull Time

SWIFT: Provides secure messaging services for global financial transactions.

3+ YOE3-5 years as Test/QA Engineer; Bachelor's in CS/SE; automation testing; Selenium; Java/Python; Linux; SQL/NoSQL; API testing; Agile.

Selenium, Java, Python, Linux, SQL, NoSQL, Postman, JMeter, LoadRunner

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Test Engineer / Cyber Test & Automation Engineer

Chantilly, Virginia, United States

OnsiteFull Time

REDLattice: Provides advanced cybersecurity software and vulnerability research services.

Bachelor's in CS/Engineering or related field; experience in test engineering, automation, or system validation; proficiency in Python/C/C++, test automation tools; Agile/Scrum; SDLC; Linux/Unix; TS/SCI clearance or eligibility.

Python, C/C++, Selenium, Git, CI/CD, Linux

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1mo

Software Engineer Integration & Test

Herndon or King of Prussia or Littleton or Sunnyvale

$77k-$135k/yr OnsiteFull Time

Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.

Active TS/SCI clearance; strong programming/scripting skills; experience with CI/CD and cloud; excellent communication and detail orientation.

Bash, Python, GitLab, Atlassian tools, CI/CD, AWS

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1mo

Embedded Software Developer

King George, Virginia, United States

$62k-$141k/yr OnsiteFull Time

Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.

2+ YOE2+ years in software development with embedded systems; C/C++ and Python; low-level development; hardware and software integration; ability to work on-site in labs and test ranges; secret clearance; bachelor’s degree.

C, C++, Python, Docker

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1mo

Software Engineer, Senior

McLean, Virginia, United States

$130k-$196k/yr OnsiteFull Time

Freddie MacOTCQB: FMCC: Purchases and securitizes home mortgages for the secondary market.

5+ YOESenior Software Engineer with 5-7 years in production software, Python/Java, data engineering, AWS, Spark, Snowflake, and ETL pipelines. Strong design and testing skills.

AWS, AWS EMR, Snowflake, Apache Spark, Java, Python, ETL/ELT

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Software Engineer II

Glastonbury or Duluth or Goldsboro or Columbus or Raleigh or Glen Allen or Scottsdale

RemoteFull Time

Atlantic Casualty: Provides excess and surplus lines commercial insurance solutions.

3+ YOEBachelor's in CS/Software Eng or related field; 3+ years in software development; proficient in Java, C#, Python, or JavaScript; SDLC/agile; strong data structures/OO design; Git; unit/integration testing.

Java, CSharp, Python, JavaScript, Git, AWS, Azure, Google Cloud, Docker, Kubernetes, CI/CD, Microservices

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Software Signals Engineer

El Segundo or McLean

$69k-$158k/yr OnsiteFull Time

Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients

3+ YOE3+ years in signal processing/DS/software development; RF testing; Python/C/C++; Agile tools; TS/SCI; BS in CS/CE/EE/STEM

Python, C, C++, Jira, Confluence, GitHub, Linux

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1mo

Software Developer – Junior (Team 01)

Washington, District of Columbia, United States

$100k-$115k/yr OnsiteFull Time

AmentumNYSE: AMTM: Provides engineering, technology, and mission support to government agencies.

1+ YOETop-Secret clearance with SCI eligibility; Bachelor's degree or equivalent experience; 1+ year backend software development experience; knowledge of Java, JavaScript, Python, SQL; familiarity with Java Spring, Node.js, cloud platforms; Agile experience; ability to develop, test, and debug software.

Java, JavaScript, Python, SQL, Git, Jira, Jenkins, Terraform, AWS, Azure

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Software Development Engineer (US Federal)

McLean, Virginia, United States

$137k-$205k/yr HybridFull Time

WorkdayNASDAQ: WDAY: Provides cloud-based software for financial and human capital management.

8+ YOE8+ years software development experience; Python, Go, Ruby; Bachelor's in CS/Engineering or equivalent; API development; testing; OO design; mentorship; technical writing.

Python, Go, Ruby, APIs

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Software Engineer (mobile)

Chantilly or McLean

HybridFull Time

M1 Technology: Developing mission-critical technology for the U.S. intelligence community.

Experience with Agile; development, maintenance, and testing of applications; enterprise SecDevOps tools (GitHub, Jenkins); independent testing throughout lifecycle; maintenance of existing infrastructure; development in Ruby, Java, JavaScript, TypeScript, HTML, C/Objective C, R, Python; ensure unit/integration/UAT testing and system changes; mobil...

GitHub, Jenkins, Ruby, Java, JavaScript, TypeScript, HTML, C, Objective C, R, Python, XCode, Swift, SwiftUI

3mo

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3mo

Security Verification Test (SVT) Software Engineer

Annapolis Junction, Maryland, United States

$70k-$190k/yr OnsiteFull Time

Belay Technologies: Provides engineering services and automation software to defense agencies.

8+ YOETS/SCI with polygraph; Bachelor's in CS or related field; 8+ years exp; strong Java; diverse tech experience; Windows/Linux; web services; cryptography basics; agile/scrum experience.

Java, Python, C/C++, SQL, SOAP, WSDL, PERL, PowerShell, VBS, Eclipse, Postgres, Oracle, Jenkins, JSON, HTML, XML, XSLT, JEE, Mongo, Tomcat, WebLogic, JBoss, Selenium, Mockito, Cucumber, FITNesse, UFT, BDD, SAFe, J2EE, XML, CANONICALIZATION

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Principal Cyber Software Test Engineer

Chantilly, Virginia, United States

OnsiteFull Time

VTG: Provides force modernization and digital transformation for defense agencies.

5+ YOEActive Top Secret/SCI with Poly; 5+ years' experience; bachelor's with 5y, master's with 3y, PhD with 1y, or 9y experience in lieu of a degree; strong software/hardware testing; clear communication.

Python, JavaScript, Test Automation, SmartBear TestComplete, Azure DevOps, Jira, UNIX, Linux, Windows, Virtual Machines

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1mo

Security Software Engineer, Emerging On-prem AI infrastructure

Reston, Virginia, United States

$147k-$211k/yr OnsiteFull Time

GoogleNASDAQ: GOOGL: Provides internet search services and cloud computing technology solutions.

2+ YOEBachelor’s degree or equivalent; 2+ yrs in software development (C/C++/Python); 2+ yrs in large-scale infra/distributed systems; 2+ yrs testing/launching software; TS/SCI clearance.

C++, C, Python, Security, Operating Systems, Networking

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Automation Test Engineer (Active TS/SCI Required)

Chantilly, Virginia, United States

OnsiteFull Time

MissionOvo: Provides technology and engineering services for national security missions.

5+ YOEActive TS/SCI clearance, BS in CS/Engineering, 5+ years test automation, frameworks Selenium/Cypress/Playwright/TestNG/JUnit, Python/Java/JS/C#, Git, API testing, Agile, embedded/hardware, cloud (AWS/Azure/GCP), performance testing, ISTQB a plus.

Selenium, Cypress, Playwright, TestNG, JUnit, Python, Java, JavaScript, C#, Git, Postman, REST Assured, Jenkins, GitLab CI, Azure DevOps, JMeter, LoadRunner

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1mo

Senior Cyber Test Engineer (Onsite)

Sterling, Virginia, United States

OnsiteFull Time

Nightwing: Provides advanced cyber and intelligence solutions for national security.

3+ YOETS/SCI with CI Poly clearance; 3 years test engineering; 3 years offensive cyber operations; 3 years Python/Bash scripting; 3 years Linux/Unix; networking knowledge; strong communication and collaboration.

Python, Bash, Linux, Docker, Networking

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Automated Testing Software Engineer (mid-level)

Dahlgren, Virginia, United States

$92k-$135k/yr OnsiteFull Time

SimVentions: Provides engineering and technology services for defense customers.

5+ YOE5-8 years of professional software development and automated testing experience; on-site at Dahlgren, VA; DoD/Secret clearance required.

Python, C++, Git, GitLab, Docker, Jenkins, RedHat Linux, Rust, Automated testing frameworks

2mo

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2mo

Associate Software Engineer

Arlington or Mount Laurel

$72k-$114k/yr OnsiteMultiple Commitments Available

Innovative Defense Technologies: Develops automated software integration and testing solutions for defense.

0+ YOE0-1 years of experience; BS in CS/CE/EE/Physics/Math or equivalent; ability to travel up to 25%; strong Java, JavaScript, Python or C++ skills; distributed systems knowledge; SDLC and OO programming familiarity; experience with Git/SVN; testing and configuration management.

Java, C++, Python, JavaScript, Linux, Git, SVN, Docker, Kubernetes, Openshift, React, Angular

2mo

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2mo

O-RAN DU Test Engineer

Arlington, Virginia, United States

HybridFull Time

DeepSig: Developing AI software for wireless signal processing and sensing.

6+ YOEDesign, develop, and execute tests for O-RAN DU software and hardware; ensure conformance, interoperability, performance, and reliability; automate tests and support CI/CD.

Python, Shell, Kubernetes, Docker, Linux, CI/CD tools

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1mo

Principal Software I&T Engineer (Contract)

Arlington or Denver or Houston or Merritt Island

RemoteContract

Airbus U.S. Space & DefenseEuronext Paris: AIR: Provides satellite, helicopter, and cybersecurity solutions for U.S. defense.

15+ YOEEmbedded software, testing, and flight software development; 15+ years experience with B.S. or 12+ with M.S.; US citizenship; ability to obtain clearance; periodic travel.

C/C++, TCL, Python, Embedded software development and testing, RTOS, Device driver development, GNC algorithms, Software safety assurance, Test scripting, Simulators, HIL

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Software Quality Assurance Engineer

Chantilly, Virginia, United States

$132k-$290k/yr OnsiteFull Time

CACINYSE: CACI: Provides information technology and professional services to government clients.

7+ YOETS/SCI with poly, 7+ years QA engineering, automated testing, Windows/Linux, test scripts, agile

Selenium, Jira, Confluence, Python, Java, test automation framework

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1mo

Software Developer, Journeyman

Herndon, Virginia, United States

$80k-$128k/yr OnsiteFull Time

Peraton: National security and mission-critical government technology services provider.

2+ YOESoftware development experience with hands-on coding, testing, and debugging; CI/CD pipelines; Git; web/backend frameworks; RMF/ATO considerations (desired).

Git, CI/CD, Containerization, Cloud services, PowerShell, Python

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Software Engineer - Core Platform

Ashburn, Virginia, United States

$110k-$130k/yr RemoteFull Time

Unacast: Provides human mobility analytics and global location intelligence solutions.

4+ YOE4+ years in software development; strong Java expertise; experience with SQL/NoSQL; AWS, Spark, Snowflake, DynamoDB; Git and CI/CD; proficient in Scala, Python or R; adept at data processing and testing.

Java, Scala, Python, R, SQL, NoSQL, MySQL, AWS, Spark, Snowflake, DynamoDB, CartoDB, Git, GitHub Actions, REST, JSON, XML

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Software Architect

McLean, Virginia, United States

OnsiteFull Time

Steampunk: Design-led federal technology consulting and innovation services firm.

8+ YOE8-10 years in software development with DevSecOps experience; design, develop, deploy microservices; strong CI/CD and test automation.

AWS, Kubernetes, Docker, CI/CD, Git, Jenkins, GitHub, GitLab, CircleCI, TravisCI, Terraform, Java, Python

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Principal Integration & Test Engineer

Chantilly, Virginia, United States

OnsiteFull Time

Trident Systems: Develops high-performance electronics for space and defense.

9+ YOEBachelor's in EE/CE/CS or related field; 9+ years in embedded systems integration and test; strong hardware/software debugging; experience with avionics or aerospace hardware.

C/C++, Python, FPGA, Lab instrumentation

2mo

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2mo

Perception Engineer

Clarksburg, Maryland, United States

$130k-$180k/yr OnsiteFull Time

Forterra: Develops autonomous driving systems for defense and industrial applications.

2+ YOEDevelop and maintain C++/Python perception software; collaborate across autonomy teams; travel to test sites.

C++, Python, Linux, Docker, Git, CI/CD, Bash, Automation

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1mo

Software Tester / QA Engineer (Web & API Testing)

Chantilly, Virginia, United States

$160k-$190k/yr OnsiteFull Time

Falls Technology: Provides secure software development and systems engineering services.

3+ YOE3+ years in software testing; strong web and REST API testing; API tools; test automation; JavaScript/Python/Java; Agile/Scrum.

Postman, Swagger, Cypress, Git, JavaScript, Python, Java, JSON

2mo

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2mo

Software Tester

Chantilly, Virginia, United States

OnsiteFull Time

KBRNYSE: KBR: Provides engineering, technology, and mission-critical services globally.

8+ YOEActive TS/SCI with a polygraph; associate or bachelor in CS/cyber security/engineering/mathematics; 8 years of experience; automated test scripting in Python/Bash/Java/JavaScript; functional and regression testing; UNIX/Windows; JIRA; customer and stakeholder interaction.

Python, Bash, Java, JavaScript, Selenium, JIRA, Unix, Windows

1mo

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1mo

Lead AI Full Stack Software Engineer – Investments Technology

Washington, District of Columbia, United States

$145k-$309k/yr HybridFull Time

T. Rowe PriceNASDAQ: TROW: Provides global investment management and retirement planning services.

8+ YOE8+ years in OO languages; cloud-native AWS/Azure; leadership; strong problem-solving; stakeholder communication; automated testing and CD.

AWS, Azure, Docker, Kubernetes, Java, Python, JavaScript, LLM, agent frameworks, Retrieval augmented generation, OpenAI Codex, Bedrock, Kiro, MCP servers

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1mo

Software QA Lead

Arlington, Virginia, United States

$145k-$185k/yr OnsiteFull Time

Sabre Systems: Provides engineering and IT solutions for defense customers.

4+ YOE2+ MgmtBachelor’s degree; 4+ years software engineering; 2+ years leadership in QA; diverse testing methodologies; SDLC knowledge; test automation; CI/CD; strong communication.

Python, pytest, C++, GoogleTest, Selenium, CI/CD, DevOps tools

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1mo

Modernization Engineer (Senior)

Manassas, Virginia, United States

OnsiteFull Time

Spear AI: Develops AI software and sensors for maritime defense operations.

Senior software engineer with Rust, C/C++, Docker/Kubernetes, Kafka/Redpanda, Terraform/Pulumi, Python; strong testing, linting, and CI/CD experience.

Rust, C/C++, Docker, Kubernetes, Kafka/Redpanda, Terraform, Pulumi, Python, GitHub Actions, Protobuf

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Software Quality Assurance Lead

Arlington, Virginia, United States

$130k-$217k/yr OnsiteFull Time

American Systems: Providing engineering and IT solutions to federal government agencies.

4+ YOE2+ MgmtSenior QA lead with 4+ years software engineering/testing, 2+ years leadership; strong testing methodologies; SDLC/DevOps; TS/SCI clearance eligibility.

Python, pytest, C++, GoogleTest, Selenium, CI/CD, DevOps

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Principal Engineer - Agentic AI Applications

Washington, District of Columbia, United States

$168k-$230k/yr HybridFull Time

SerkoNZX: SKO: Provides online corporate travel and expense management software.

12+ YOE12+ years software engineering; 4+ years in technical leadership; production experience with LLM-powered or agentic systems; Python backend expertise; strong observability, architecture, and testing skills

Python, LangGraph, AutoGen, CrewAI, TypeScript, Node.js, RAG pipelines, vector databases, tool-calling APIs, multi-step reasoning