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Senior Python Flask Developer Jobs in Pennsylvania

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Senior Python Flask Developer information

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 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 Pennsylvania? The most popular types of Python Flask Developer jobs in Pennsylvania are:
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What cities in Pennsylvania are hiring for Senior Python Flask Developer jobs? Cities in Pennsylvania 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 Pennsylvania as of August 2026, with employment types broken down into 1% Internship, 87% Full Time, 4% Part Time, and 8% Contract. Highlights an 81% Physical, 5% Hybrid, and 14% Remote job distribution.

Senior Full Stack Developer (Angular + Python)

System One Holdings, LLC

Pittsburgh, PA • On-site

Full-time

Medical, Dental, Vision, Life, Retirement

Re-posted yesterday

Job description

Job Title: Senior Full Stack Developer (Angular + Python)
Location: Chicago, IL
Type: Contract
Compensation: Open
Work Model: Onsite - onsite/Remote
Hours: 40.0
Responsibilities
  • Design and implement frontend components using Angular, including component architecture, modules, lazy loading, standalone components, and reusable design systems.
  • Manage state with NgRx or Angular Signals, employing reactive patterns with RxJS, and designing service-layer interactions.
  • Optimize performance through change detection tuning, AOT compilation, and testing with Jasmine, Jest, or Cypress, ensuring accessibility standards are met (WCAG).
  • Develop backend APIs with Python FastAPI, including RESTful endpoint creation, Pydantic models, dependency injection, and OpenAPI documentation.
  • Implement async/await patterns, background tasks, caching, and rate limiting for performance enhancements.
  • Manage security and authentication using JWT/OAuth2, middleware, CORS, and coordinate input validation following OWASP guidelines.
  • Design and model PostgreSQL schemas, implement normalization, indexing strategies, migrations with Alembic, and optimize queries using EXPLAIN ANALYZE, CTEs, window functions.
  • Utilize SQLAlchemy for ORM and transaction management, ensuring transaction isolation and connection pooling.
  • Work with AWS cloud services, including serverless architecture, Lambda functions, SNS/SQS messaging, data pipelines with AWS Glue ETL, S3, and IAM security.
  • Participate in sprint planning, issue estimation, risk escalation, stakeholder communication, and collaborate across product, QA, and DevOps teams.

Requirements
  • Proven experience with Angular 15+ including NgRx, RxJS, Angular Signals, and TypeScript.
  • Strong backend development skills with Python 3.10+, FastAPI, Pydantic, SQLAlchemy, and API design principles.
  • Hands-on experience with PostgreSQL, including schema design, indexing, query optimization, and migrations using Alembic.
  • Knowledge of AWS cloud services such as Lambda, Glue, SNS, SQS, S3, and CloudWatch.
  • Experience implementing security and authentication with JWT and OAuth2.
  • Familiarity with performance tuning, accessibility standards, and testing frameworks like Jasmine, Jest, and Cypress.
  • Excellent collaboration, mentoring, and communication skills in a team environment.
  • Bachelor's degree in Computer Science, Information Technology, or related field preferred.

System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
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Ref: #404-IT Pittsburgh

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