Senior Python Backend Engineer

Description

Frenzy AI is building a next-generation personalization and search platform for e-commerce. We’re looking for a Senior Backend Engineer to help scale the Python backend powering live e-commerce experiences.

This is a backend-first role focused on scalability, search, API performance, and integrating machine learning workflows into production environments. The ideal candidate is senior, hands-on, self-driven, and comfortable working in a small team where ownership and fast learning are essential.

Responsibilities Build and scale backend APIs for live e-commerce use cases

Develop and improve backend functionality for search systems

Work on scalability, performance, reliability, and cost optimization

Improve API response times and server-side platform performance

Integrate machine learning workflows into backend production systems

Build and support backend components for search, personalization, and recommendation use cases

Work with technologies such as Python, Flask, MySQL, Redis, Elasticsearch, and AWS

Own features end-to-end, from design and development to deployment, monitoring, and support

Collaborate closely with the backend lead and broader team while taking responsibility for core backend work

Requirements

Strong backend engineering experience with Python, ideally Flask or Django

Proven experience building production-grade REST APIs

Hands-on experience with MySQL and Redis

Strong experience with Elasticsearch

Practical experience with semantic search, relevance tuning, ranking, or recommendation systems

Strong experience with AWS; ECS experience is preferred

Experience with AWS data services such as Athena, DynamoDB, Firehose, and S3

Experience with GitHub workflows, CloudFormation, and CI/CD pipelines

Working knowledge of JavaScript and React

Proven experience operating high-scale, low-latency production systems

Experience working with large codebases or large applications at scale

Experience integrating AI/ML workflows into production environments

Ability to work independently, learn quickly, and contribute without heavy day-to-day hand-holding

Familiarity with Shopify APIs or the Shopify ecosystem is a plus, but not required

Benefits

Remote role open to candidates across Latin America

Opportunity to work on a high-scale e-commerce personalization and search platform

Backend-first role with strong ownership over production systems

Work closely with a small team where your contributions can have direct impact

Exposure to search, recommendation systems, scalability, and AI/ML production workflows