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

Unisys

Python Developer

Reston, VA

$52.25 - $72/hr

We are seeking a Senior Python Developer to support the design, development, and scaling of cloud-native applications. The ideal candidate should have experience in end-to-end development, delivering ...

Ekcel Technologies Inc

Sr AWS Python Developer

Reston, VA · On-site

$126.40K - $170.10K/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

$122.80K - $165.30K/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

$122.80K - $165.30K/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

$122.80K - $165.30K/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 ...

CGI Inc.

Senior AWS Python Developer

Reston, VA · On-site

$126.40K - $170.10K/yr

Senior AWS Python Developer Category: Software Development/ Engineering Main location: United States, Virginia, Reston Position ID:J0426-1915 Employment Type: Full Time U.S. - Finding purpose at CGI ...

CGI

Senior AWS Python Developer

Reston, VA

$126.40K - $170.10K/yr

We are seeking a highly skilled and experienced Senior AWS Python Developer with a strong background in AWS cloud services, scalable application development, and DevOps practices. The ideal candidate ...

NT Concepts

Python Developer

Herndon, VA · On-site +1

$51.75 - $71.25/hr

This position requires mid to senior level of experience, a passion for mission support, and a ... We are seeking a Full Stack Python Developer to work under Technical Lead, building scalable web ...

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$146K

$200.5K

How much do senior python developer jobs pay per year?

As of May 29, 2026, the average yearly pay for senior python developer in Herndon, VA is $145,998.00, according to ZipRecruiter salary data. Most workers in this role earn between $124,900.00 and $168,100.00 per year, depending on experience, location, and employer.

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 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 most commonly searched types of Python Developer jobs in Herndon, VA? The most popular types of Python Developer jobs in Herndon, VA are:
What are popular job titles related to Senior Python Developer jobs in Herndon, VA? For Senior Python Developer jobs in Herndon, VA, the most frequently searched job titles are:
What job categories do people searching Senior Python Developer jobs in Herndon, VA look for? The top searched job categories for Senior Python Developer jobs in Herndon, VA are:
What cities near Herndon, VA are hiring for Senior Python Developer jobs? Cities near Herndon, VA with the most Senior Python Developer job openings:
Senior Python Developer jobs near you
Infographic showing various Senior Python Developer job openings in Herndon, VA as of May 2026, with employment types broken down into 80% Full Time, 14% Part Time, and 6% Contract. Highlights an 92% Physical, 5% Hybrid, and 3% Remote job distribution, with an average salary of $145,998 per year, or $70.2 per hour.

Senior Full stack Python Developer (Angular)

Acess Global

Reston, VA • On-site

Contractor

Posted 3 days ago

Job description

 Job Title – Senior Full stack Python Developer (Angular)

Location – Reston, VA (In-person client interview)

Duration – Contract

Job Description:

Position Summary
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, AWS service expertise, foundational data engineering capabilities, and a disciplined approach to software quality and automation. The ideal candidate will be able to work collaboratively across teams, follow established engineering practices, and deliver secure, scalable, and maintainable solutions.

 Required Technical Qualifications

Python Development

  • Strong proficiency in Python for backend service development with 8-10 years of experience
  • Experience with relevant Python libraries such as Pandas, Boto3, and data‑processing packages
  • Proficiency with automated testing using PyTest, including fixtures, mocking, and parameterization
  • Understanding of clean code principles, error handling, type hints, and maintainable design

 API Engineering

  • Hands-on experience building RESTful APIs using Flask, Django, or FastAPI
  • Knowledge of authentication and authorization mechanisms (JWT, OAuth2)
  • Experience implementing API versioning, request validation, and structured error handling
  • Understanding of performance considerations such as throughput, latency, and caching

 AWS Cloud Services

  • Practical experience with key AWS services including:
    Lambda, S3, Step Functions, Glue, EC2, ECS/Fargate, RDS, Redshift, CloudWatch
  • Ability to design event‑driven, serverless, and containerized architectures
  • Familiarity with distributed systems patterns such as retries, dead‑letter queues, and idempotent operations
  • Experience monitoring applications via CloudWatch metrics, logs, and alarms

 Infrastructure, DevOps, & Tooling

  • Hands-on experience with GitLab for version control and CI/CD pipeline development
  • Experience using Terraform (or similar) for infrastructure‑as‑code
  • Proficiency with Docker for containerized application development
  • Ability to use shell scripting and AWS CLI for operational automation
  • Familiarity with Agile development workflows (Jira, Confluence)

 AI‑Assisted Development Tools (Required Competency)

To support modern engineering productivity and code quality standards, candidates must:

  • Demonstrate familiarity with GitHub Copilot or comparable AI‑assisted development tools
  • Use AI tools responsibly to:
    • Accelerate development while maintaining code correctness
    • Generate and refine unit tests and integration test scaffolding
    • Improve readability, documentation, and boilerplate reduction
    • Assist with refactoring, code reviews, and exploratory coding
  • Understand organizational expectations around responsible AI usage, including validation, security, and compliance
  •  
  • This is a mandatory requirement, not a bonus skill.

 Data Engineering Skills (Required)

Candidates are expected to have practical exposure to foundational data engineering concepts, including:

  • Experience building or maintaining data pipelines using AWS Glue, PySpark, or Lambda‑based ETL flows
  • Working knowledge of SQL and relational databases (e.g., Postgres, Aurora, or MySQL)
  • Ability to optimize SQL queries (joins, aggregations, window functions)
  • Understanding of data modeling, data validation, and schema evolution
  • Familiarity with Redshift ingestion patterns (e.g., COPY operations) and performance optimization
  • Experience working with data stored in S3, including partitioning, data lifecycle considerations, and file formats (Parquet/JSON)

 Front-End Exposure

  • Basic familiarity with Angular, particularly for integrating backend APIs
  • Ability to read and modify UI components when needed

 Soft Skills & Engineering Mindset

  • Ability to communicate effectively with technical and non‑technical stakeholders
  • Strong analytical and problem‑solving capability
  • Demonstrated ability to navigate, understand, and improve existing codebases
  • Understanding of design patterns and architectural principles
  • Focus on reliability, scalability, automation, and long‑term maintainability
  • Ability to collaborate in Agile teams and provide high‑quality documentation