Senior Python Backend Engineer - FastAPI (Hybrid)

Lennor Group; Taguig; Hybrid; PHP 1,200,000 - 2,200,000; Full time

Job summary

Lennor Group is seeking a Senior Python Developer for its hybrid setup in the Philippines. The role focuses on building asynchronous back-end services with FastAPI, PostgreSQL integrations, and scalable REST APIs within a BPO-oriented tech solutions context.

The candidate should bring 6–8 years of Python backend experience, strong SQLAlchemy and Pydantic skills, and hands-on Docker/Kubernetes knowledge for deployment and reliability.

Qualifications

• 6–8 years of experience in Python backend development or a closely related software engineering role.
• Hands-on experience developing asynchronous applications and REST APIs using FastAPI.
• Experience with Pydantic for request validation, data modeling, and response serialization.
• Strong knowledge of PostgreSQL and SQLAlchemy 2.0-style ORM development, including mapped classes and relationship loading strategies.
• Experience designing REST APIs with structured error handling and consistent response schemas.
• Experience implementing database migrations using Liquibase XML changesets and Maven-based workflows.
• Experience writing automated tests using pytest and mocking dependencies with unittest.mock.
• Familiarity with PyArrow and Arrow Flight for data access and integration.
• Working knowledge of Docker, Kubernetes, and Helm deployment concepts.

Responsibilities

• Develop and maintain asynchronous backend services using FastAPI and Pydantic models for request and response validation.
• Design, implement, and maintain REST APIs with structured error handling and consistent response formats.
• Develop and optimize PostgreSQL database interactions using SQLAlchemy 2.0-style ORM patterns, mapped classes, and relationship loading strategies.
• Integrate backend services with PostgreSQL, Snowflake, and Dremio through PyArrow Flight or Arrow Flight.
• Manage database schema changes and migrations using Liquibase XML changesets within Maven-based workflows.
• Develop and maintain automated tests using pytest and unittest.mock to validate application functionality and dependencies.
• Containerize applications using Docker and support deployment workflows involving Kubernetes and Helm.
• Troubleshoot backend, database, and integration issues while maintaining application reliability, performance, and code quality.

Skills

Python backend

Asynchronous programming

REST API design

PostgreSQL

SQLAlchemy ORM

Pydantic

Testing with pytest

Docker

Kubernetes

Tools

FastAPI

Liquibase

Maven

PyArrow

Arrow Flight

SQLAlchemy

Docker

Kubernetes

Helm

Job description

Lennor Group is seeking a Senior Python Developer for its hybrid setup in the Philippines. The role focuses on building asynchronous back-end services with FastAPI, PostgreSQL integrations, and scalable REST APIs within a BPO-oriented tech solutions context.

The candidate should bring 6–8 years of Python backend experience, strong SQLAlchemy and Pydantic skills, and hands-on Docker/Kubernetes knowledge for deployment and reliability.