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Senior Backend Python Jobs in Ashburn, VA (NOW HIRING)

Leidos

Mid-Level Backend Software Engineer

Gaithersburg, MD · On-site

$87K - $157K/yr

... senior levels, you'll thrive here. We're hiring a Backend Software Engineer to support a high ... Design, develop, test, and maintain backend application components using Java or Python * REST API ...

Noblis

Senior Python Developer

Chantilly, VA · On-site

$124K - $167K/yr

  • Medical

  • Life

  • Retirement

  • PTO

The developer will function as a full-stack engineer building and extending Python-based front-end and back-end capabilities that process diverse data formats encountered during forensic ...

Noblis

Senior Python Developer

Chantilly, VA · On-site

$124K - $167K/yr

  • Medical

  • Life

  • Retirement

  • PTO

The developer will function as a full-stack engineer building and extending Python-based front-end and back-end capabilities that process diverse data formats encountered during forensic ...

Comcast

Python Engineer, Agentic AI

Washington, DC · On-site +1

$142K - $213K/yr

... senior engineers and product partners to design, develop, test, and maintain backend services and ... Write clean, well-structured, and maintainable Python code that follows established coding ...

Pelagic AI

Backend Engineer with Security Clearance

Mclean, VA · On-site

$140K - $210K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Backend Engineer - (Mid-Level / Senior) Req Number: 1000-505 Location(s): Herndon, VA Position Type ... in Python for scripting, data processing, and automation tasks • Understanding of machine ...

Molg

Backend Software Engineer

Sterling, VA · On-site

A senior-level software engineer with a strong track record of architecting and maintaining ... Strong proficiency in at least one high-level object-oriented language (Ruby, Python, Java, etc.

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Senior Backend Python information

See Ashburn, VA salary details

$16.4K

$151.6K

$195.3K

How much do senior backend python jobs pay per year?

As of Aug 18, 2026, the average yearly pay for senior backend python in Ashburn, VA is $151,584.00, according to ZipRecruiter salary data. Most workers in this role earn between $148,800.00 and $171,300.00 per year, depending on experience, location, and employer.

What does a senior backend Python developer do?

A Senior Backend Python Developer designs, builds, and maintains the server-side logic of web applications using Python. They are responsible for creating robust APIs, optimizing databases, ensuring application security, and integrating third-party services. In addition, they often mentor junior developers, contribute to architectural decisions, and collaborate closely with frontend and DevOps teams. Their work ensures that applications are scalable, reliable, and efficient. Senior developers typically have several years of experience and deep knowledge of Python frameworks like Django or Flask.

What are the key skills and qualifications needed to thrive as a senior backend Python developer?

To thrive as a Senior Backend Python Developer, you need expertise in Python programming, strong knowledge of backend frameworks (such as Django or Flask), and experience with database management, often backed by a degree in computer science or equivalent experience. Familiarity with version control systems like Git, containerization tools like Docker, cloud platforms (e.g., AWS), and possibly certifications in cloud or Python technologies are common requirements. Outstanding problem-solving skills, effective communication, and the ability to mentor junior developers help set top performers apart. These competencies ensure the development of robust, scalable, and maintainable backend systems that support business objectives.

What are some common challenges senior backend Python developers face when working on large-scale systems?

Senior Backend Python developers working on large-scale systems often encounter challenges such as ensuring application scalability, maintaining code quality across distributed teams, and optimizing performance for high traffic. Balancing the integration of new features with legacy system constraints can also be demanding. Effective communication and collaboration with frontend teams, DevOps, and product managers are crucial for delivering reliable and maintainable backend solutions.

What is the difference between Senior Backend Python vs Backend Developer?

AspectSenior Backend PythonBackend Developer
Required CredentialsBachelor's in CS or related, 5+ years experience, Python expertiseBachelor's in CS or related, 2-4 years experience, Python knowledge
Work EnvironmentTech companies, startups, enterprise systemsTech firms, startups, software agencies
Employer & Industry UsageUsed across industries requiring scalable backend solutionsCommon in web development and software services
Search & Comparison IntentUnderstanding senior roles, responsibilities, salaryEntry to mid-level backend roles, skill requirements

Senior Backend Python professionals typically have more experience, advanced skills, and leadership responsibilities compared to Backend Developers. They often work on complex systems, mentor junior staff, and have a broader understanding of architecture. Backend Developers focus on building and maintaining backend services with less emphasis on leadership or strategic planning.

What are the most commonly searched types of Backend Python jobs in Ashburn, VA?

The most popular types of Backend Python jobs in Ashburn, VA are:

What cities near Ashburn, VA are hiring for Senior Backend Python jobs?

Cities near Ashburn, VA with the most Senior Backend Python job openings:

Senior Backend Python jobs near you
Infographic showing various Senior Backend Python job openings in Ashburn, VA as of July 2026, with employment types broken down into 91% Full Time, 4% Part Time, and 5% Contract. Highlights an 81% Physical, 4% Hybrid, and 15% Remote job distribution, with an average salary of $151,584 per year, or $72.9 per hour.

Python Developer (Mid-Senior)

JTEC Consulting LLC

Chantilly, VA • On-site

$150K - $175K/yr

Full-time

Re-posted 29 days ago

Job description

Python Developer (Mid-Senior)
Chantilly, VA 20151
JTEC Consulting LLC focuses on successfully delivering solutions to meet our clients' most critical needs. Our founding members have decades of experience delivering a wide range of solutions to Air Force and DOD clients. We are a Veteran-Owned Small Business.
Security Clearance Requirement: Current TS/SCI with polygraph
Location Note: All work will be performed on-site
Relocation: Relo support for candidates outside the commuting area will be considered
Position Description:
JTEC Consulting is hiring Python Developers at the mid-senior career level to support a data science and software engineering team developing and deploying systems across multiple federal environments. Qualified candidates will have experience developing microservices in Python using FastAPI. Working knowledge of Linux OS in AWS cloud infrastructure is required. Current security clearance credentials are required for consideration.
Duties and responsibilities vary by role and may include:
  • Work as part of a blended team of government and contractor personnel including data scientists and technical team members supporting application and systems development projects for deployment across multiple environments
  • Support development for end-to-end system features from user experience to backend code and deployment
  • Provide expertise to the development team using Agile methodologies, modern languages, cloud technologies, and microservices
  • Promote adoption of industry best practices to meet customer requirements
  • Ensure solutions align with current and future architecture and operational environments
  • Support hands-on development in Python and shell scripting for internal and external APIs
  • Deploy code using Jenkins and GitHub
  • Support unit testing, code reviews, and related activities
  • Leverage Scrum methodology
  • Support cloud infrastructure deployment for mission critical and classified workloads using AWS Commercial Cloud Services (C2S)
  • Deploy applications using microservices and Kubernetes container orchestration
  • Collaborate with networking team members and ISSM to ensure that data access and routing meet customer's stated requirements
  • Support overall program deliverables, as assigned, including documentation and reports
  • Support full on-site schedule

Education and qualifications:
  • U.S. citizenship
  • Current TS/SCI with polygraph required for consideration
  • Bachelor's degree in a related discipline (Computer Science, Information Systems, or technical discipline)
    • Equivalent years of related experience may be considered in lieu of a degree
  • 10+ years of related experience with Python application development including:
    • Python coding
    • FastAPI
    • SQLAlchemy
    • API development
  • Experience working with AWS cloud and virtual infrastructure including:
    • AWS C2S
    • Amazon Virtual Private Cloud/AWS IDL VPC
  • Experience working with AWS tools including:
    • Managed OpenSearch
    • EMR
    • EC2
    • Lambdas
  • Experience deploying containerized microservices with Kubernetes
  • Experience building and running containerized applications using Helm and Docker
  • Experience with Jenkins, GitHub, and other CI/CD tools
  • Experience with version control systems including Git
  • Experience working with big data search tools such as OpenSearch, Elastic, Airflow, PySpark, and Trino
  • Effective written and verbal communication skills to work in a dynamic team environment
  • Availability to support a full on-site work schedule

Additional experience in one or more of these areas is preferred:
  • Experience with large-scale, massively parallel distributed data processing tools including Spark, Hadoop, Presto, NiFi
  • Programming experience using Python, Java, Perl, C, C++
  • Experience with ELK Stack (Elasticsearch, Logstash, Kibana)
  • Experience maintaining and optimizing Elastic clusters
  • Experience working and developing capabilities in Linux and Windows
  • Experience with automating project builds using shell scripts, Jenkins, and using and writing Makefiles
  • Experience with Linux bash shell scripting
  • Experience with HTML, JavaScript, Regular Expressions, JSON
  • Experience building a Python web server and performing setup in Flask
  • Experience working with varied file types including text, image, video, audio, binary
  • Knowledge of machine learning is a plus
  • Experience using automated data frameworks

#PySpark #ELK #NiFi #Hadoop #FastAPI
JTEC Consulting LLC provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.
Salary:
JTEC offers competitive compensation and benefits to all employees. Salary ranges are advertised based on good faith estimates at the time of posting and indicating pay that JTEC anticipates for successful applicants. The estimated salary range displayed in this posting covers a range of positions and levels. Salary determinations are dependent upon position requirements, individual qualifications, education, experience, location, and other job related factors. Our recruiting team will review candidates' related experience and desired salary targets during the evaluation process. All qualified candidates will be considered.
Pay Range: $150,000 - $175,000 per year

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