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Senior Python Software Engineer Jobs in Fairfax, VA

INTELLIPLACERS, LLC

Python Developer

Mclean, VA · On-site

$51.50 - $71/hr

Role: Senior Python Developer Location: McLean, VA (5 Days onsite) Duration: Long term project ... Looking for a consultant with minimum 10+ years of hands-on professional Python software ...

Maxiom Technology

Senior Python Developer

Washington, DC · On-site

$137K - $185K/yr

We are looking for a Senior Python Developer to join our software development team. Senior Python Developer responsibilities include participating in the entire software development lifecycle ...

NT Concepts

Software Engineer, Python

Vienna, VA · On-site +1

We are seeking a Python Software Engineer to join our team. Working at NT Concepts means that you ... This position requires mid to senior level of experience, a passion for mission support, and a ...

NT Concepts

Senior Python Developer

Chantilly, VA · On-site +1

$124K - $167K/yr

We are seeking a Senior Python Developer to join our team. Working at NT Concepts means that you ... Ensure compliance with software design, development, testing, integration and sustainment standards

NT Concepts

Senior Python Developer

Chantilly, VA · On-site

$120K - $180K/yr

We are seeking a Senior Python Developer to join our team. Working at NT Concepts means that you ... Ensure compliance with software design, development, testing, integration and sustainment standards

Mindlance

Python Software Developer

Mclean, VA · On-site

$51.50 - $71/hr

Software Developer Professional - Python Location: McLean, VA 22102 ( 5 Days onsite from day 1 ) Duration: 6 Months Contracts + Chances of extension Manager Wants to Know: * How do you handle ...

NT Concepts

Software Engineer, Python

Vienna, VA · On-site

$84K - $144K/yr

We are seeking a Python Software Engineer to join our team. Working at NT Concepts means that you ... This position requires mid to senior level of experience, a passion for mission support, and a ...

Mindlance

Sr, Python Developer

Mclean, VA · On-site

$124K - $167K/yr

Title: Senior Software Developer /Senior Full Stack developer- Python Location: Mclean VA (fully onsite) Contract role Must-Have Qualifications: At least 4 years of hands-on software development ...

Interon IT Solutions

Senior Python AWS Developer

Reston, VA · On-site

$126K - $170K/yr

Senior Python AWS developer Location: Reston, VA (Onsite - In-person interview) Experience: 10+ years Candidate Preference: Local to DMV area Work Type: 100% hands-on technical role We are seeking a ...

NimbusAITech LLC

Python Developer

Mclean, VA · On-site

$51.50 - $71/hr

Python Software Developer (Financial Accounting & Forecasting Applications) Client: Freddie Mac (Investments & Capital Markets Division) Location: McLean, VA (Local candidates only -- within a 40 ...

BTree Solutions, Inc.

SR. PYTHON DEVELOPER

Reston, VA · On-site

$126K - $170K/yr

Job Title: SR. PYTHON DEVELOPER Location: Reston,VA Duration: 12+ Months Visa: USC, GC, H1B and EAD Contract Type: W2 Development : * Python Developer with experience in Java as a plus. * Proficient ...

HyrUS Inc.

Senior Python Developer

Mclean, VA · On-site

$124K - $167K/yr

... g., Python, Java, OR C##). Candidate must have Git version control, SQL, and Unit testing ... Senior Software Developer (Specializing Financial Accounting Applications) - CW Freddie Mac ...

hyrusinc

Senior Python Developer

Mclean, VA · On-site

$122K - $165K/yr

Senior Software Developer (Specializing Financial Accounting Applications) - CW Freddie Mac ... g., Python, Java). · 1-2 years of experience using Git for source control in a team-based ...

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All JobsPython Software Engineer JobsSenior Python Software Engineer JobsSenior Python Software Engineer Jobs in Fairfax, VA

Senior Python Software Engineer information

See Fairfax, VA salary details

$56.2K

$145.1K

$199.3K

How much do senior python software engineer jobs pay per year?

As of Sep 14, 2026, the average yearly pay for senior python software engineer in Fairfax, VA is $145,123.00, according to ZipRecruiter salary data. Most workers in this role earn between $124,200.00 and $167,100.00 per year, depending on experience, location, and employer.

What does a senior Python software engineer do?

A Senior Python Software Engineer designs, develops, tests, and maintains complex software applications using the Python programming language. They often lead or mentor junior developers, architect software solutions, and ensure best coding practices are followed. These professionals collaborate with cross-functional teams to deliver scalable and efficient systems, troubleshoot issues, and optimize application performance. Their expertise includes advanced knowledge of Python frameworks, libraries, and development tools, as well as experience with databases, APIs, and cloud services.

What are the key skills and qualifications needed to thrive as a senior Python software engineer?

To thrive as a Senior Python Software Engineer, you need advanced proficiency in Python programming, strong problem-solving abilities, and a solid background in computer science or a related field. Familiarity with frameworks like Django or Flask, experience with version control systems such as Git, and knowledge of cloud platforms and CI/CD tools are typically required. Leadership, effective communication, and mentorship skills help you collaborate with teams and guide junior developers. These skills ensure the delivery of robust, scalable software solutions and foster a productive, innovative development environment.

What are some common challenges faced by senior Python software engineers when leading complex projects, and how can they be addressed?

Senior Python Software Engineers often face challenges such as balancing hands-on coding with mentoring junior team members, managing technical debt, and designing scalable solutions. Successfully addressing these challenges involves clear communication, proactive code reviews, and effective prioritization of tasks. Collaborating closely with cross-functional teams and fostering a culture of knowledge sharing can also help ensure project success and team growth.

What is the difference between Senior Python Software Engineer vs Python Developer?

AspectSenior Python Software EngineerPython Developer
Required CredentialsBachelor's degree in CS or related field, experience in software engineeringBachelor's degree in CS or related field, coding proficiency
Work EnvironmentDesigning complex systems, leading projects, mentoringWriting code, developing applications, debugging
Employer & Industry UsageTech companies, startups, enterprise softwareWeb development, data analysis, automation projects
Common Search & Comparison IntentUnderstanding senior-level roles, responsibilities, and skillsEntry to mid-level coding roles, project involvement

The main difference between a Senior Python Software Engineer and a Python Developer lies in experience, responsibilities, and scope. Senior engineers typically lead projects, design system architecture, and mentor junior staff, while Python Developers focus on coding, application development, and implementation. Both roles require strong Python skills and relevant credentials, but senior roles demand more experience and leadership capabilities.

Which senior Python software engineer job is in demand?

Senior Python software engineering roles are in high demand across industries such as technology, finance, and healthcare, especially for positions involving data analysis, machine learning, and web development. Skills in frameworks like Django or Flask, along with experience in cloud platforms and version control, enhance job prospects in this field.

What are popular job titles related to Senior Python Software Engineer jobs in Fairfax, VA?

For Senior Python Software Engineer jobs in Fairfax, VA, the most frequently searched job titles are:

What job categories do people searching Senior Python Software Engineer jobs in Fairfax, VA look for?

The top searched job categories for Senior Python Software Engineer jobs in Fairfax, VA are:

What cities near Fairfax, VA are hiring for Senior Python Software Engineer jobs?

Cities near Fairfax, VA with the most Senior Python Software Engineer job openings:

Senior Python Software Engineer jobs near you
Infographic showing various Senior Python Software Engineer job openings in Fairfax, VA as of September 2026, with employment types broken down into 1% Internship, 1% As Needed, 82% Full Time, 14% Part Time, and 2% Contract. Highlights an 84% Physical, 3% Hybrid, and 13% Remote job distribution, with an average salary of $145,123 per year, or $69.8 per hour.

Python Software Engineer - Mid & Senior Levels (TS/SCI w/ Poly)

Chantilly, VA • On-site

JTEC Consulting
See more jobs at JTEC Consultingexternal

$124K - $167K/yr

Other

Posted 14 days ago

Job description

Position:Python Software Engineer – Mid & Senior Levels (TS/SCI w/ Poly)

Location: Chantilly, VA

Job Id:728

# of Openings:0

Python Software Engineer – Mid & Senior Levels (TS/SCI w/ Poly)

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:100% On-Site

Relocation:Relo support for candidates outside the commuting area will be considered


Position Description:

JTEC Consulting is actively hiringMid-Level and Senior Python Software Engineers to join a specialized team developing and deploying high-impact data systems across classified federal environments in Chantilly, VA.

In this role, you will design, build, and deploy containerized microservices and backend APIs in an AWS cloud infrastructure supporting multiple active task orders across data science and software engineering initiatives. In this role you will work within an agile team of developers, data scientists, and mission experts to solve complex, data-heavy challenges.

Core Responsibilities:
  • Backend & API Development: Design, build, and maintain scalable backend microservices and APIs using Python and FastAPI.
  • Cloud Infrastructure & Deployment: Deploy, manage, and scale microservices within secure cloud environments (AWS C2S) using Kubernetes, Docker, and Helm.
  • Data Integration & Search: Build and optimize data pipelines and search capabilities across large-scale structured and unstructured datasets using SQLAlchemy, OpenSearch/Elasticsearch, and PySpark.
  • CI/CD & DevOps Automation: Automate software testing, integration, and deployment using Jenkins, Git/GitHub, and shell scripting.
  • Agile Collaboration: Participate in end-to-end agile development sprints, conduct peer code reviews, and align engineering practices with security guidelines (ISSM/IA).
Education and Qualifications:
  • Current TS/SCI with polygraph required for consideration
  • Bachelor’s degree in Computer Science, Information Systems, or a related technical discipline (equivalent years of direct experience considered in lieu of a degree).
  • Experience Level:
    • Mid-Level: 5+ years of software development experience with a focus on Python.
    • Senior Level: 8+ years of software development experience with advanced architectural design experience.
  • Core Tech Stack:
    • Modern Python development (FastAPI, Flask, or similar REST frameworks).
    • Relational & Object-Relational Mapping tools (e.g., SQLAlchemy, SQL databases).
    • Containerization & Orchestration (Docker, Kubernetes, or Helm).
    • Cloud Computing experience (AWS, AWS C2S, EC2, Lambda, VPC).
    • Version Control & Automation (Git, Jenkins, CI/CD pipelines).
Preferred Qualifications:
  • Hands-on experience with big data processing tools (PySpark, Airflow, Trino, NiFi, or Hadoop).
  • Experience configuring and maintaining Elasticsearch / ELK Stack or OpenSearch clusters.
  • Knowledge of additional languages (Java, C++, or Bash scripting).
  • Familiarity with machine learning frameworks or data modeling techniques.

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 is 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.

JTEC Consulting, LLC | A Veteran - Owned Small Business | Contact Us: recruiting@jtec-consulting.com
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