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Senior Python Developer Jobs in Annandale, VA (NOW HIRING)

Ekcel Technologies Inc

Sr AWS Python Developer

Reston, VA · On-site

$126K - $170K/yr

Sr AWS Python Developer (2 positions) Location- Reston, VA (In person Client interview) day one onsite Experience : 8 to 18 years FTE or C2C We are looking for Visa independent candidates only for ...

Mavens Guild

Senior Spark & Python Developer

Mclean, VA · On-site

$122K - $165K/yr

In a senior developer role, you will design and build data flow and data integration processes to ... Drawing from your vast hands-on experience in Python (PySpark), Spark, REST, Java, and Scala, you ...

Mavens Guild

Senior Spark & Python Developer

Mclean, VA · On-site

$122K - $165K/yr

In a senior developer role, you will design and build data flow and data integration processes to ... Drawing from your vast hands-on experience in Python (PySpark), Spark, REST, Java, and Scala, you ...

Mavens Guild

Senior Spark & Python Developer

Mclean, VA · On-site

$122K - $165K/yr

In a senior developer role, you will design and build data flow and data integration processes to ... Drawing from your vast hands-on experience in Python (PySpark), Spark, REST, Java, and Scala, you ...

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All JobsPython Developer JobsSenior Python Developer JobsSenior Python Developer Jobs in Annandale, VA

Senior Python Developer information

See Annandale, VA salary details

$54.7K

$141.2K

$194K

How much do senior python developer jobs pay per year?

As of Jul 8, 2026, the average yearly pay for senior python developer in Annandale, VA is $141,216.00, according to ZipRecruiter salary data. Most workers in this role earn between $120,800.00 and $162,600.00 per year, depending on experience, location, and employer.

What are the main responsibilities of a Senior Python Developer?

A Senior Python Developer is responsible for designing, developing, and maintaining complex software applications using the Python programming language. They lead the technical aspects of projects, mentor junior developers, and ensure code quality through code reviews and best practices. Additionally, they collaborate with cross-functional teams to gather requirements, solve technical challenges, and deploy scalable and efficient solutions. Senior Python Developers are also expected to stay updated with the latest trends and advancements in Python and related technologies.

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

AspectSenior Python DeveloperPython Developer
Required ExperienceTypically 5+ years, with leadership and complex project experienceUsually 1-3 years, focusing on core Python skills
ResponsibilitiesDesigning architecture, mentoring, handling complex systemsWriting code, debugging, implementing features
CertificationsOptional but beneficial (e.g., Python certifications, cloud certs)Often not required
Work EnvironmentCollaborative teams, project planning, code reviewsDevelopment-focused, task-oriented

The main difference between a Senior Python Developer and a Python Developer lies in experience, responsibilities, and leadership. Senior developers handle complex projects, mentor others, and often participate in architecture decisions, while Python Developers focus on coding and feature implementation. Both roles are essential in tech companies, but the senior role requires more experience and broader skills.

What are the key skills and qualifications needed to thrive as a Senior Python Developer, and why are they important?

To thrive as a Senior Python Developer, you need advanced proficiency in Python programming, experience with software architecture, and a solid understanding of algorithms and data structures, usually backed by a degree in computer science or related fields. Familiarity with frameworks like Django or Flask, version control systems such as Git, and containerization tools like Docker are typically required, alongside knowledge of modern CI/CD pipelines. Strong problem-solving abilities, effective communication, and leadership skills help you collaborate with teams and mentor junior developers. Mastery of these skills ensures the delivery of scalable, maintainable software solutions and the ability to drive technical excellence within development teams.

What are some common challenges faced by Senior Python Developers when leading a development team?

Senior Python Developers often encounter challenges such as balancing hands-on coding with mentoring junior team members and ensuring code quality across the team. They are also responsible for making architectural decisions, which requires staying updated on best practices and emerging Python frameworks. Additionally, coordinating collaboration between cross-functional teams (like DevOps, QA, and front-end developers) can be complex, especially in agile environments where requirements may shift rapidly. Overcoming these challenges helps foster a productive and innovative team culture.
What are the most commonly searched types of Python Developer jobs in Annandale, VA? The most popular types of Python Developer jobs in Annandale, VA are:
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Senior Python Developer jobs near you

Senior Web Application / Python Developer - DoD Program, Fort Belvior, VA

inventium.io LLC

Springfield, VA • On-site

$127K - $171K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 11 days ago

Job description

Salary:

This is a Senior Web Application / Python Developer position for supporting a DoD program located in Fort Belvior, Virginia.


Overview:

We are seeking a Senior Python Developer to join our dedicated technical team in safeguarding those who serve against criminal, terrorism, and emerging threats. If you have a passion for analytics and innovation, you'll find a dynamic and collaborative culture here where your work has a direct impact on our operations. A DoD Secret clearance is required to start.

As a key member of our high-achieving team, you'll design and deliver high-quality technical solutions in Python. You'll maintain functional and technical knowledge of our mission systems, focusing on leveraging technology to support business objectives. Your role involves identifying technical challenges and opportunities for efficiency, offering insights through system design, and providing technical perspectives for configuration. This role is both challenging and rewarding, offering a chance to make a significant difference.


Your Impact:

  • Independently work on the development and data migration of several legacy ColdFusion/Oracle DB software application to a modern Python-based system architecture.
  • Work onsite at the customers location in Fort Belvior, VA, engaging directly with customers of varying technical backgrounds.
  • Handle a broad range of duties, from gathering and refining requirements to developing, testing, and supporting the deployment of the resultant code.
  • Juggle multiple tasks, manage deadlines, and work independently and efficiently.
  • On a typical day, focus on new features or enhancements and data migration, with occasional troubleshooting of end-user issues and support for recently deployed features.


Qualifications:

  • Active DoD Clearance
  • 5+ years of experience in developing web applications using Python and Python frameworks (e.g., Django, Flask).
  • Proficiency in front-end web development (HTML, CSS, JavaScript, modern JS frameworks).
  • 5+ years of experience with SQL (e.g., Oracle, PostgreSQL, MySQL) including queries, stored procedures, triggers, tuning, and database design.
  • Experience in migrating data and systems from ColdFusion to a Python-based environment.
  • Familiarity with version control systems, preferably Git.
  • Ability to quickly learn and work with legacy code, identify solutions, and discuss with clients as necessary.
  • Strong attention to detail with excellent written and verbal communication skills.
  • Experience in creating user-friendly and intuitive software.
  • Capability to work collaboratively with clients to understand business requirements and propose solutions.

This position offers a unique opportunity to contribute to a vital mission and work with advanced technologies in a supportive environment. If you're ready to make a significant impact, we'd love to have you on our team.


About Inventium.io:

Inventium.io LLC is a technical consulting and software development services company dedicated to protecting and advancing our national defense and scientific capabilities. Based out of the Washington DC area, we rely on innovation to continually advance our employees' skills and provide digital transformation solutions to our customers.

With proven records of successfully delivering quality services and solutions to multiple federal agencies, our technical competencies include Emerging Technology Solutions, DevSecOps, Cloud Migration, Machine Learning, System Modernization, and Technology Management.


Benefits and Perks

  • Employer paid Health Benefits (Medical, Dental and Vision)
  • Retirement Plan
  • Paid Time Off and Federal Holidays
  • Training and Development
  • Awards and Recognition
  • Employee Referral Program


Inventium.io is committed to creating a diverse environment and is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.