Senior Python Backend Engineer

Cynet Systems

Atlanta, GA

Job Overview:

Requirement/Must Have:

8-10 years of professional software development experience, with strong recent focus on backend engineering.
Strong proficiency in Python and backend development using Flask.
Demonstrated experience building and maintaining REST APIs in production.
Solid experience with SQLAlchemy (ORM, relationships, transactions, session management, performance considerations).
Strong hands-on expertise in MS SQL Server and database development (schema design, complex queries, tuning).
Proven experience implementing secure authentication/authorization.
Strong testing mindset with hands-on experience in Pytest.
Working experience with Docker for development and deployment.
Strong debugging, performance tuning, and problem-solving skills.
Strong verbal and written communication skills.

Responsibilities:

Design, develop, and maintain backend services using Python and Flask.
Build and evolve RESTful APIs (versioning, pagination, error handling, performance, documentation).
Develop and optimize data models and persistence layers using SQLAlchemy.
Lead database development on MS SQL Server: schema design, stored procedures (if applicable), indexing, query optimization, performance tuning, and data migrations.
Implement and maintain authentication/authorization mechanisms (e.g., JWT/OAuth2/session-based auth), including secure token handling and role-based access.
Containerize services and streamline deployments using Docker (Dockerfiles, Compose, image optimization).
Create and maintain automated tests using Pytest (unit, integration, contract/API tests), ensuring strong coverage and reliability.
Contribute to automation frameworks and end-to-end testing using Playwright (UI and/or API flows).
Collaborate with cross-functional teams (product, QA, DevOps) to deliver high-quality releases.
Participate in code reviews, enforce engineering best practices, and mentor junior engineers.
Troubleshoot production issues, perform root-cause analysis, and drive continuous improvements in stability and performance.
Contribute to services or integrations written in Java as needed (maintenance, enhancements, interoperability).

Nice to Have:

Experience with Java services (e.g., microservices, integrations, maintenance).
Hands-on automation experience using Playwright (end-to-end testing, test stability, CI integration).

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Vacancy posted 4 days ago

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