Python Developer

Role Description

The U.S. Census Bureau’s Demographic Systems Division (DSD) is seeking experienced Python Developers to support modernization, data engineering, and application development efforts across multiple project areas. In this role, you will help transition mission-critical demographic processing systems toward open-source technologies, cloud-ready architectures, and scalable, high-performance data workflows.

You will work with a modern technical stack that may include:

• Python (Pandas, NumPy)
• GitLab CI/CD
• Docker
• Linux
• PostgreSQL
• AWS services such as EC2, S3, and Lambda

These projects involve:

• Refactoring legacy SAS codebases
• Developing efficient data pipelines
• Improving computational performance
• Building well-structured, maintainable software used in high-visibility federal data programs

Ideal candidates enjoy:

• Solving complex technical problems
• Optimizing large-scale data workflows
• Collaborating in GitLab-based development environments
• Contributing to an engineering culture focused on code quality, scalability, and continuous improvement

Qualifications

• Strong proficiency in Python for backend development, automation, or data processing
• Demonstrated ability to profile, refactor, and optimize code for performance at scale
• Experience with relational databases, especially PostgreSQL, and writing advanced SQL queries
• Hands-on experience with ETL pipelines or large-scale dataset processing
• Familiarity with Linux environments and modern development workflows (Git, CI/CD, automated testing)
• Ability to write clean, maintainable, and well-documented code
• Ability to perform standard Linux end-user tasks
• Experience with data validation in statistical or analytical processing environments
• Cloud computing experience (AWS preferred)

Requirements

• Must successfully pass the Census Bureau’s security/background investigation
• Successful completion of the Census Bureau background investigation
• Strong Python development expertise, including data manipulation, automation, or backend system development
• Experience improving performance in production Python environments
• Knowledge of ETL development and large-scale data processing
• Familiarity with Linux, Git, CI/CD pipelines, and unit testing
• Clear, maintainable, and well-documented coding style
• Knowledge of cloud computing environments (AWS) is a plus

Benefits

• Work is 100% remote; however, the company reserves the right to require onsite work
• Leisnoi provides reasonable accommodations, according to applicable state and federal laws, to all qualified individuals with physical or mental disabilities

Company Description

Leisnoi is an Equal Opportunity Employer. Leisnoi considers all applicants for employment without regard to race, color, sex, national origin, religion, age, physical or mental disability, family responsibility, marital status, sexual orientation, political affiliation, veteran's status or any other legal protected status. Pursuant to The Alaska Native Claims Settlement Act 43 U.S.C. Sec. 1601 et seq., and federal contractual requirements, Leisnoi Corporation may legally grant certain preference in employment opportunities to Leisnoi Shareholders and their Descendants. EOE/AA/M/F/D/V