Senior Python Backend Engineer Mission Critical About Us We

Reactlibraries; Mission (KS); On-site; USD 80,000 - 100,000; Full time

Job summary

A tech company focused on modernization is seeking a candidate to migrate its systems from Perl to Python, involving the development of production-ready FastAPI services. Ideal applicants should have strong Python and FastAPI experience, alongside skills in MySQL, Linux, and CI/CD. The role promises high autonomy and responsibility, requiring the candidate to oversee major aspects of the migration process and enhance infrastructure reliability.

Qualifications

• Strong Python experience with production systems.
• Proven experience with FastAPI in a production setting.
• Strong MySQL knowledge (schema design, indexing, query optimization).
• Comfortable in Linux (Ubuntu) command line.
• Experience with pytest for testing.
• GitHub and GitHub Actions CI/CD experience.
• Experience deploying behind Nginx or Apache.
• Docker experience.
• Professional use of VS Code or similar IDE.
• Understanding of API design and system decoupling.

Responsibilities

• Build production-ready FastAPI services.
• Define migration architecture and strategy to gradually replace the legacy monolith.
• Improve CI/CD maturity and implement robust deployment practices.
• Strengthen infrastructure reliability and operational procedures.
• Document architectural decisions and maintain clear technical documentation.
• Collaborate with a small team to ensure smooth migration and production stability.

Skills

Python experience

FastAPI experience

MySQL knowledge

Comfortable in Linux

pytest experience

GitHub Actions CI/CD

Nginx or Apache deployment

Docker experience

VS Code or similar IDE usage

API design understanding

Job description

Job Description

This is an external job posting. Apply directly on the employer's website.

About the Role

This role is part of a modernization effort to migrate from a Perl-based legacy system to Python-based services. The successful candidate will help build production-ready FastAPI services, define migration architecture, and strengthen CI/CD and infrastructure reliability. This is a high-autonomy, high-responsibility role with broad ownership of the modernization effort.

Responsibilities

• Build production-ready FastAPI services.
• Define migration architecture and strategy to gradually replace the legacy monolith.
• Improve CI/CD maturity and implement robust deployment practices, including rollback-safe deployments.
• Strengthen infrastructure reliability and operational procedures.
• Document architectural decisions and maintain clear technical documentation.
• Collaborate with a small team to ensure smooth migration and production stability.

Qualifications

• Strong Python experience with production systems.
• Proven experience with FastAPI in a production setting.
• Strong MySQL knowledge (schema design, indexing, query optimization).
• Comfortable in Linux (Ubuntu) command line.
• Experience with pytest for testing.
• GitHub and GitHub Actions CI/CD experience.
• Experience deploying behind Nginx or Apache.
• Docker experience.
• Professional use of VS Code or similar IDE.
• Understanding of API design and system decoupling.

Nice-to-have:

• Ability to read Perl code and participate in modernization of monolithic systems.
• Experience with Google APIs, Stripe or other payment systems.
• Basic React experience (for internal admin tools); React is not a primary frontend requirement.