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Full Time Xr Software Engineer Jobs in Washington

Ardent Principles, Inc.

Software Engineer

Chantilly, VA · On-site

$130K - $260K/yr

Active TS/SCI with Full Scope Polygraph LOCATION: Full-time, onsite in Chantilly, VA We have an immediate need for a mission‑driven Software Engineer who thrives in modern Lean Agile environments ...

CACI

Software Engineer

Fairfax, VA · On-site

Software Engineer Job Category ... Engineering Time Type: Full time Minimum Clearance Required to Start: Top Secret Employee Type:

New

Booz Allen Hamilton

Software Engineer

Mclean, VA

Software Engineer The Opportunity: As an AI software engineer, you know that good software is more ... Full-time and part-time employees working at least 20 hours a week on a regular basis are eligible ...

Booz Allen Hamilton, Inc.

Software Engineer

Mclean, VA · On-site

Software Engineer The Opportunity: As an AI software engineer, you know that good software is more ... Full-time and part-time employees working at least 20 hours a week on a regular basis are eligible ...

Booz Allen Hamilton, Inc.

Software Engineer

Mclean, VA · On-site

Software Engineer The Opportunity: As an AI software engineer, you know that good software is more ... Full-time and part-time employees working at least 20 hours a week on a regular basis are eligible ...

Booz Allen Hamilton

Software Engineer

Mclean, VA

Software Engineer The Opportunity: As an AI software engineer, you know that good software is more ... Full-time and part-time employees working at least 20 hours a week on a regular basis are eligible ...

SW Complete

Software Engineer

Columbia, MD · On-site

Job Type Full-time Description Founded in 2007 and headquartered in Columbia, Maryland, Synergy ECP is a leading provider of cybersecurity, software and systems engineering and IT services to the U.S ...

2HB Incorporated

Software Engineer

Annapolis, MD · On-site

This is a full-time position, and requires a TS/SCI/Full Scope Polygraph Clearance. 2HB Incorporated is seeking a Software Engineer in order to support its government customer in Annapolis Junction ...

CACI International, Inc.

Software Engineer

Fairfax, VA · On-site

Engineering Time Type: Full time Minimum Clearance Required to Start: None Employee Type: Regular Percentage of Travel Required: None Type of Travel: None * * * The Opportunity As a Software Engineer ...

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Software Engineer

Ardent Principles, Inc.

Chantilly, VA • On-site

$130K - $260K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 11 days ago

Job description

Software Engineer
Department: Data Analysis and Technology Services
Employment Type: Full Time
Location: Chantilly, VA
Compensation: $130,000 - $260,000 / year
Description
REQUIRED: Active TS/SCI with Full Scope Polygraph
LOCATION: Full-time, onsite in Chantilly, VA
We have an immediate need for a mission‑driven Software Engineer who thrives in modern Lean Agile environments and enjoys building high‑impact capabilities that blend cloud engineering, scalable search, and LLM‑powered workflows. You must understand cloud environments such as Azure or AWS and will work on designing, developing, and deploying software systems.
Who We Are:
Ardent Principles delivers cutting‑edge capabilities across data science, data engineering, software engineering, AI solutions, cybersecurity, staff augmentation, and IT program management. We thrive at the intersection of mission, technology, and innovation.
Passionate Integrity, Driven by Excellence
At Ardent Principles, we don't just offer jobs-we build careers rooted in purpose. Our competitive salary ranges and industry‑leading benefits are designed to support long‑term stability, growth, and overall well‑being. We're committed to creating an environment where talented people can do their best work and feel valued while doing it.
Join us as we continue building the future of secure, high‑impact solutions.
Key Responsibilities
In this challenging yet rewarding role as a Software Engineer (SME level), you are an integral part of what brings our Company's mission to life. You must have the following required skills, certifications and demonstrated experience in and/or with:
  • Working in a Lean Agile development environment
  • Building or integrating LLM-based solutions including RAG, semantic search or AI-assisted retrieval systems
  • Developing detailed design and associated deliveries
  • Translating customer and systems requirements into design
  • Designing system interfaces
  • Developing Single Page Applications using React (modern hooks‑based architecture), HTML5, and CSS3.
  • Hands‑on experience developing RESTful APIs using Node.js and Express (or comparable modern backend frameworks).
  • Hands‑on experience with and troubleshooting Internet and web‑related protocols and technologies such as Tomcat, Node.js, Web Services, or SSL.
  • Working with testing platforms such as Jest or Karma.
  • Hands‑on experience working with DevOps tools such as Git, Jenkins, or Nexus.
  • Hands‑on experience with Elasticsearch (index design, querying, relevance tuning, and scaling).
  • Designing or implementing data pipelines to support search and/or RAG workflows (e.g., ingestion, chunking, embeddings, vector search).

Highly Desired Qualifications
Other skills and demonstrated experiences that are highly desired but not mandatory to perform the work, include:
  • Evaluating, selecting, and integrating LLMs (e.g., OpenAI, open‑source models) into enterprise applications
  • Working with vector databases, hybrid search (keyword + semantic), and relevance optimization
  • Ability to lead or mentor teams in adopting search + AI/LLM best practices (strong preference for candidates who can elevate team capability, not just contribute individually)

What We Offer You
  • Highly Competitive Salary: Recognizing and rewarding your expertise and contributions.
  • Generous Paid Time Off: Providing ample time for rest, relaxation, and personal pursuits.
  • Dedicated Training Budget: Supporting continuous learning and professional development.
  • 100% Employer-Covered Family Vision, Dental, and Health Insurance: Ensuring comprehensive health coverage for you and your family.
  • 100% Employer-Covered Life and Disability Insurance: Offering financial security and peace of mind.
  • 401(k) Plan with a 6% Employer Match: Helping you plan and save for a secure retirement, with 100% vesting from day one.
  • 11 Paid Government Holidays: Observing national holidays to ensure time off with family and friends.
  • Spot Bonuses for Exceptional Performance: Rewarding outstanding contributions and achievements.

SCHEDULE:
This is a full-time position with consultants expected to be available and working onsite in Chantilly, VA during core hours.
Ready to take the next step in your career? Join us and be part of a team dedicated to driving positive change through technology. Apply now with our easy 3-minute, mobile-friendly initial application process. Your future starts here!

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