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Senior Python Flask Developer Jobs in Ashburn, VA

ManTech

Senior Python Developer

Herndon, VA · Remote

$141K - $236K/yr

MANTECH seeks a driven and mission-focused Senior Python Developer to join our elite team based in Herndon, VA . In this role, you will contribute directly to innovative projects that support the ...

ManTech International

Senior Python Developer

Herndon, VA · On-site

$141K - $236K/yr

MANTECH seeks a driven and mission-focused Senior Python Developer to join our elite team based in Herndon, VA . In this role, you will contribute directly to innovative projects that support the ...

Palnar

Sr. Python Developer

Mclean, VA · On-site

$123K - $166K/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 · On-site

$131K - $237K/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

Springfield, VA · On-site

$131K - $237K/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

Manassas, VA · On-site

$131K - $237K/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 · On-site

$131K - $237K/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

Chantilly, VA · On-site

$131K - $237K/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

Herndon, VA · On-site

$131K - $237K/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

Chantilly, VA · On-site

$131K - $237K/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

Aldie, VA · On-site

$131K - $237K/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

Burke, VA · On-site

$131K - $237K/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 · On-site

$131K - $237K/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

Chantilly, VA · On-site

$131K - $237K/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 ...

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All JobsPython Flask Developer 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 Jul 10, 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 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 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 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 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 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:
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Senior Python Flask Developer jobs near you

Python Developer (Mid-Senior)

JTEC Consulting LLC

Chantilly, VA • On-site

$150K - $175K/yr

Full-time

Re-posted 21 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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