Sr. Python/React Web developer

Job Description

Do you love a career where you Experience, Grow & Contribute at the same time, while earning at least 10% above the market? If so, we are excited to have bumped onto you.

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If you are a Sr. Python/React Web developer Platforms looking for excitement, challenge and stability in your work, then you would be glad to come across this page.

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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

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Full-time