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Senior Python Flask Developer Jobs in Ashburn, VA

PTR Global

Senior Python Developer

Mclean, VA

$80 - $85/hr

Senior Python Developer Location: McLean, Virginia Duration: Contract Job ID: 177144 Job Overview: The Senior Software Developer will contribute to the firm's data modernization initiative within the ...

New

Hexaware Technologies, Inc

Python Developer

Reston, VA

$52.25 - $72/hr

The Senior Python Developer will design, develop, test, and implement cloud native applications, data pipelines, and backend services within AWS. The role requires strong Python engineering skills ...

PTR Global

Senior Python Developer

Mclean, VA

$80 - $85/hr

Python Developer Location: Mclean, VA Duration: 12+ Months (Possible extension) * Client's Investments and Capital Markets division is currently seeking a Senior Software Developer who can contribute ...

New

Saransh Inc

Sr. Python Developer with Spark and AWS

Mclean, VA · On-site

$122.80K - $165.30K/yr

Role: Sr. Python Developer Location: McLean, VA (Hybrid - 3 days a week onsite) Job Type: Contract Required Skills: Python, Spark, AWS (S3, Lambda, IAM, SG etc.), AWS IAM Idaas Qualifications: * Min ...

CGI Inc.

Senior Python Developer with Spark

Reston, VA · On-site

$126.40K - $170.10K/yr

Senior Python Developer with Spark Category: Software Development/ Engineering Main location: United States, Virginia, Reston Position ID:J0526-0018 Employment Type: Full Time U.S. - What we do ...

Guru Schools

Python Developer III

Washington, DC · On-site

$57 - $78.50/hr

Python Developer III 4 DAYS ONSITE MUST BE LOCAL FACE TO FACE INTERVIEW MUST HAVE POWER BI EXPERIENCE SENIOR PYTHON DEVELOPER Python, reporting- part of the Enterprise Data Management team supporting ...

Palnar

Sr. Python Developer

Mclean, VA · On-site

$123.50K - $166.20K/yr

Master's degree in Computer Science, Software Engineering or related technical field Demonstrated knowledge of: * Python, Pandas and other popular Python libraries * Java * Testing frameworks such as ...

Leidos

Senior Python Developer

Chantilly, VA

$131.30K - $237.35K/yr

Four years of experience in a Python Development role * Bachelor's degree in computer science, Software Engineering, Computer Engineering, or related field * Expertise in scripting (Python, shell ...

Mindlance

Senior Python Developer

Mclean, VA

$124.60K - $167.70K/yr

Detailed Python Full Stack Developer Location: (Fully Onsite), Mclean, VA 22102 Duration: 6 months + Extensions Responsibilities: * Refactor and modernize existing components of an ETL application to ...

Leidos

Senior Python Developer

Chantilly, VA

$131.30K - $237.35K/yr

Four years of experience in a Python Development role * Bachelor's degree in computer science, Software Engineering, Computer Engineering, or related field * Expertise in scripting (Python, shell ...

Leidos

Senior Python Developer

Reston, VA

$131.30K - $237.35K/yr

Four years of experience in a Python Development role * Bachelor's degree in computer science, Software Engineering, Computer Engineering, or related field * Expertise in scripting (Python, shell ...

Leidos

Senior Python Developer

Sterling, VA

$131.30K - $237.35K/yr

Four years of experience in a Python Development role * Bachelor's degree in computer science, Software Engineering, Computer Engineering, or related field * Expertise in scripting (Python, shell ...

CGI

Senior Python Developer with Spark

Reston, VA · On-site

$126.40K - $170.10K/yr

We are seeking a Senior Python Developer with Spark skills to design, build, and optimize large-scale data processing systems in a cloud-native AWS environment. This role focuses heavily on ...

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All JobsSenior Python Flask Developer JobsSenior Python Flask Developer Jobs in Ashburn, VA

Senior Python Flask Developer information

See Ashburn, VA salary details

$56.2K

$145.2K

$199.4K

How much do senior python flask developer jobs pay per year?

As of May 29, 2026, the average yearly pay for senior python flask developer in Ashburn, VA is $145,185.00, according to ZipRecruiter salary data. Most workers in this role earn between $124,200.00 and $167,200.00 per year, depending on experience, location, and employer.

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

To thrive as a Senior Python Flask Developer, you need advanced proficiency in Python, deep understanding of the Flask framework, and experience designing scalable backend architectures, typically supported by a degree in computer science or related field. Familiarity with RESTful API development, database management systems like PostgreSQL or MySQL, and version control tools such as Git is essential, and certifications in cloud platforms or web development can be beneficial. Strong problem-solving skills, clear communication, and the ability to mentor junior developers are standout soft skills for this role. These abilities ensure efficient delivery of robust, maintainable web applications and foster productive collaboration within development teams.

What are some common challenges faced by Senior Python Flask Developers when working on large-scale applications?

Senior Python Flask Developers often encounter challenges such as managing complex codebases, ensuring scalability, and maintaining performance as applications grow. Integrating Flask with other technologies (like databases, caching systems, or third-party APIs) can introduce architectural complexities. Additionally, balancing rapid development with writing maintainable, well-tested code is crucial. Collaboration with frontend developers, DevOps, and QA teams is frequent, requiring strong communication and problem-solving skills.

What are Senior Python Flask Developers?

Senior Python Flask Developers are experienced software engineers who specialize in building web applications using the Python programming language and the Flask web framework. They are responsible for designing, developing, and maintaining scalable backend systems, APIs, and web services. In addition to strong coding skills, they often lead projects, mentor junior developers, and ensure best practices in code quality, security, and performance. Their expertise allows them to solve complex technical challenges and contribute to the overall architecture and success of software projects.

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

AspectSenior Python Flask DeveloperPython Developer
Required CredentialsBachelor's in CS or related, experience with Flask, REST APIsBachelor's in CS or related, basic Python knowledge
Work EnvironmentWeb development teams, startups, tech companiesSoftware development teams, startups, tech companies
Employer & Industry UsageTech firms, SaaS companies, startupsVariety of industries including finance, healthcare, tech
Search & Comparison IntentAdvanced roles, leadership, project scopeEntry to mid-level development, learning

The main difference between a Senior Python Flask Developer and a Python Developer lies in experience and responsibilities. Senior developers typically have more expertise in Flask, lead projects, and mentor junior staff, whereas Python Developers may focus on coding and basic application development. Both roles are essential in web development teams, but senior roles require deeper knowledge and leadership skills.

What are the most commonly searched types of Python Flask Developer jobs in Ashburn, VA? The most popular types of Python Flask Developer jobs in Ashburn, VA are:
What are popular job titles related to Senior Python Flask Developer jobs in Ashburn, VA? For Senior Python Flask Developer jobs in Ashburn, VA, the most frequently searched job titles are:
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Senior Python Flask Developer jobs near you

Senior Python Developer

PTR Global

Mclean, VA

$80 - $85/hr

Other

Medical, Dental, Vision, Retirement, PTO

Posted 2 days ago

Job description

Position: Senior Python Developer
Location: McLean, Virginia
Duration: Contract
Job ID: 177144
Job Overview:
The Senior Software Developer will contribute to the firm's data modernization initiative within the Investments and Capital Markets division. This role involves developing and enhancing core features of Cohorting engines to source data from the Enterprise warehouse, supporting close-of-business activities, and ensuring the integrity, accuracy, and timeliness of outputs. The developer will also collaborate with team members to implement ETL capabilities, add quality control reports, and perform data profiling to meet project requirements.
Responsibilities:
  • Refactor and modernize existing components of an ETL application to improve maintainability, performance, and scalability.
  • Perform end-to-end testing to verify accuracy across all layers and conduct parallel testing to ensure data integrity in the new system.
  • Establish metrics and monitoring systems to evaluate the effectiveness of implemented solutions.
  • Diagnose and resolve defects, eliminate technical debt, and drive continuous improvements aligned with software engineering best practices.
  • Write clean, robust, high-quality code supported by automated unit and integration tests with strong coverage.
  • Coordinate with team members across different layers of the stack (data, services, APIs, and infrastructure) to deliver end-to-end solutions.
  • Assist with infrastructure upgrades, platform migrations, and adoption of new technologies to improve reliability, security, and operational efficiency.
  • Contribute to design discussions, code reviews, and documentation, demonstrating a commitment to collaborative problem-solving and high-quality deliverables.
  • Document findings and outcomes to build a knowledge base for future reference.

Qualifications:
  • Hands-on software development experience using Python programming.
  • Proficiency in pandas and NumPy Python libraries.
  • 2 to 3 years of experience using Git for source control in a team-based development environment.
  • 2 to 3 years of experience with SQL and relational database development.
  • 1 to 2 years of experience with containerization and orchestration technologies (e.g., Docker, Podman, Kubernetes).
  • 2 to 3 years of experience with unit testing frameworks (e.g., Pytest) and implementing automated test coverage.
  • Strong oral and written communication skills, along with team collaboration abilities.
  • Critical thinking and problem-solving skills, with familiarity in Agile development processes.

Preferred Skills:
  • Graduate degree in Information Technology, Computer Science, or related field.
  • Experience engaging with team members to gather requirements, align priorities, and drive delivery.
  • Exposure to product and project management tools (e.g., JIRA) for planning, tracking, and execution.
  • Relevant technical certifications.

Must Have Qualifications:
  • 5+ years of software development experience using Python.
  • Hands-on experience with Python, Git, unit testing, and database technologies including Snowflake, Databricks, or SQL Server.
  • 1 to 2 years of experience working with containerization tools (e.g., Docker, Kubernetes).

About PTR Global: PTR Global is a leading provider of information technology and workforce solutions. PTR Global has become one of the largest providers in its industry, with over 5000 professionals providing services across the U.S. and Canada. For more information visit
At PTR Global, we understand the importance of your privacy and security. We NEVER ASK job applicants to:
  • Pay any fee to be considered for, submitted to, or selected for any opportunity.
  • Purchase any product, service, or gift cards from us or for us as part of an application, interview, or selection process.
  • Provide sensitive financial information such as credit card numbers or banking information. Successfully placed or hired candidates would only be asked for banking details after accepting an offer from us during our official onboarding processes as part of payroll setup.

Pay Range: $80-85/hr.
The specific compensation for this position will be determined by several factors, including the scope, complexity, and location of the role, as well as the cost of labor in the market; the skills, education, training, credentials, and experience of the candidate; and other conditions of employment. Our full-time consultants have access to benefits, including medical, dental, vision, and 401K contributions, as well as PTO, sick leave, and other benefits mandated by applicable state or localities where you reside or work.
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