Sr. Python/React Web developer

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Requirements

Role: Sr. Python/React Web developer

Location:NYC, NY.

Exp: 7-10+Years

Requirements

We are seeking a Senior Python/React Web Developer with 7–10 years of experience to join our Jefferies Internal Data Marketplace team. The ideal candidate will have strong expertise in back-end development using Python and front-end development with React.js. This role demands solid architectural skills, problem-solving abilities, and the ability to work collaboratively within an Agile/Scrum environment.

Key Responsibilities:

• Design, develop, and maintain scalable web applications using Python (3.7+) , Django, or Flask.
  

• Build robust front-end interfaces using React.js (preferably v14+) , HTML5, CSS3, and JavaScript.
  

• Integrate web applications with both SQL (PostgreSQL/MySQL) and NoSQL databases (Snowflake preferred).
  

• Develop and maintain reusable, testable code with OOP principles and data handling libraries like Pandas .
  

• Implement concurrency/multithreading and custom Python modules to optimize performance.
  

• Work with ORM frameworks such as SQLAlchemy for seamless DB operations.
  

• Deploy Python-based applications to AWS Cloud , using Docker/Kubernetes and CI/CD pipelines.
  

• Collaborate closely with cross-functional teams following Agile methodologies using tools like JIRA .
  

• Optionally integrate in-memory caching mechanisms and handle data processing using DuckDB and Apache Arrow (nice to have).
  

• Perform unit testing and code reviews to ensure high code quality.
  

Must-Have Skills:

• Strong experience with Python 3.7+ , Django/Flask, SQLAlchemy, Pandas
  

• Solid understanding of React.js (v14+) , JavaScript, HTML, CSS
  

• Experience with PostgreSQL/MySQL and preferably Snowflake
  

• Knowledge of multi-threading/concurrency in Python
  

• Hands-on deployment experience on AWS (EC2, S3, Lambda, etc.)
  

• Familiarity with Docker , Kubernetes , CI/CD tools , Git/Bitbucket
  

• Excellent communication, problem-solving, and documentation skills
  

Nice-to-Have:

• Experience with DuckDB and Apache Arrow
  

• Experience with application-level caching (e.g., Redis, Memcached)
  

• Familiarity with Python development tools like Anaconda or VS Code
  

• Exposure to Agile/SCRUM practices and JIRA
  

Benefits

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