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Senior Python Flask Developer Jobs in Fairfax, VA

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 ...

Saransh Inc

Sr. Python Developer with Spark and AWS

Mclean, VA · On-site

$122K - $165K/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 ...

hyrusinc

Senior Python Developer

Mclean, VA

$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 ...

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 ...

Mindlance

Senior Python Developer

Mclean, VA · On-site

$124K - $167K/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

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

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

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

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

Merrifield, 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

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 ...

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All JobsPython Flask Developer JobsSenior Python Flask Developer JobsSenior Python Flask Developer Jobs in Fairfax, VA

Senior Python Flask Developer information

See Fairfax, VA salary details

$56.2K

$145.1K

$199.3K

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

As of Sep 14, 2026, the average yearly pay for senior python flask developer 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 is a senior Python Flask developer?

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 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 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.

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Cities near Fairfax, VA with the most Senior Python Flask Developer job openings:

Senior Python Flask Developer jobs near you

Senior Python Full Stack Engineer

Reston, VA • On-site

WorkNovas LLC
See more jobs at WorkNovas LLCexternal

Contractor

Re-posted 12 days ago

Job description

Senior Python Full Stack Engineer

Reston, VA, 3 days onsite

Description:

We are seeking a Senior Full Stack Engineer to support the design, development, and scaling of cloud-native applications. The role involves working across the stack using Python and modern frontend frameworks, with a strong focus on building robust APIs and distributed systems on AWS (Lambda, ECS, RDS, etc.).

The ideal candidate should have demonstrated experience in owning end-to-end development, delivering production-grade solutions, and contributing to system architecture, performance optimization, and reliability. The engineer will collaborate with cross-functional teams to ensure high-quality, scalable, and maintainable implementations.

We are looking for candidates with a strong foundation in clean code practices, scalable system design, and cloud-native development, along with experience working with LLM models and integrating AI-driven capabilities into applications.

Skills:

• Proven experience developing and deploying production-grade applications

• Experience working with LLM models and integrating AI-driven capabilities into applications

• Strong proficiency in Python and backend frameworks such as FastAPI, Flask

• Experience building full-stack applications using modern frontend frameworks (e.g., React, Angular, or Vue.js)

• Solid understanding of RESTful APIs, microservices architecture, and distributed systems

• Hands-on experience with databases (SQL and NoSQL) such as PostgreSQL, DynamoDB

• Strong experience with AWS services, including EC2, ECS, Lambda, RDS, S3, API Gateway, DynamoDB, ALB, Batch, and EFS

• Experience with cloud-native architectures, containerization (Docker), and orchestration (Kubernetes)

• Experience with CI/CD pipelines, Git, and platforms such as GitLab

• Proficiency in Software Development Lifecycle (SDLC) best practices

• Experience with infrastructure as code using tools like Terraform

• Strong understanding of software design principles, data structures, and algorithms

• Experience with automated testing, including unit and integration testing, and maintaining high code quality through code reviews

• Ability to design and optimize systems for performance, scalability, and reliability

• Experience processing large-scale data in formats such as JSON, XML, and Parquet

• Experience using AI-assisted coding tools (e.g., GitHub Copilot or similar)

• Strong problem-solving skills and ability to work in an agile, collaborative environment

Education/Work Experience:

• Bachelor degree in Computer Science, Information Systems or related field

• Professional certification(s) desired 10+ years software development experience across the appropriate platform

• Solid IT background and experience.

• Experience as a Senior Developer for projects similar in scope and responsibility