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Senior Python Flask Developer Jobs in Merrifield, VA

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 ...

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 ...

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

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

Falls Church, 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

$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 ...

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

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

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

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

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 Merrifield, VA

Senior Python Flask Developer information

See Merrifield, VA salary details

$54.9K

$141.6K

$194.5K

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

As of Sep 7, 2026, the average yearly pay for senior python flask developer in Merrifield, VA is $141,615.00, according to ZipRecruiter salary data. Most workers in this role earn between $121,200.00 and $163,100.00 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.

What are popular job titles related to Senior Python Flask Developer jobs in Merrifield, VA?

For Senior Python Flask Developer jobs in Merrifield, VA, the most frequently searched job titles are:

What cities near Merrifield, VA are hiring for Senior Python Flask Developer jobs?

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

Senior Python Flask Developer jobs near you
Infographic showing various Senior Python Flask Developer job openings in Merrifield, VA as of August 2026, with employment types broken down into 1% Internship, 87% Full Time, 7% Part Time, and 5% Contract. Highlights an 76% Physical, 6% Hybrid, and 18% Remote job distribution, with an average salary of $141,615 per year, or $68.1 per hour.

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

JTEC Consulting

Chantilly, VA • On-site

$160K - $180K/yr

Full-time

Posted 8 days ago

Key responsibilities

  • Design, build, and maintain scalable backend microservices and APIs using Python and FastAPI.

  • Deploy, manage, and scale microservices within secure cloud environments (AWS C2S) using Kubernetes, Docker, and Helm.

  • Build and optimize data pipelines and search capabilities across large-scale structured and unstructured datasets using SQLAlchemy, OpenSearch/Elasticsearch, and PySpark.

Job description

Python Software Engineer – Mid amp; 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 hiring Mid-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 amp; API Development: Design, build, and maintain scalable backend microservices and APIs using Python and FastAPI.
  • Cloud Infrastructure amp; Deployment: Deploy, manage, and scale microservices within secure cloud environments (AWS C2S) using Kubernetes, Docker, and Helm.
  • Data Integration amp; Search: Build and optimize data pipelines and search capabilities across large-scale structured and unstructured datasets using SQLAlchemy, OpenSearch/Elasticsearch, and PySpark.
  • CI/CD amp; 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:
  • U.S. citizenship
  • 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 amp; Object-Relational Mapping tools (e.g., SQLAlchemy, SQL databases).
    • Containerization amp; Orchestration (Docker, Kubernetes, or Helm).
    • Cloud Computing experience (AWS, AWS C2S, EC2, Lambda, VPC).
    • Version Control amp; 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.
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