Sabrina Miller, Developer in Buenos Aires, Argentina
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Sabrina Miller

Verified Expert  in Engineering

Back-end Developer

Buenos Aires, Argentina
Toptal Member Since
November 26, 2021

Sabrina is a Python developer with over 15 years of experience. She is focused on leading cross-functional teams and improving tools and infrastructure to maximize productivity, minimize system downtime, and quickly respond to the changing needs of the business. As a dedicated self-learner, Sabrina is enthusiastic about challenges and delivering solutions using new technologies.


Python 3, Django, PostgreSQL, REST, Amazon Web Services (AWS), Python, APIs...
Real Trends
Python 3, Python 2, DYNAMO, REST, Django, Python, Amazon Web Services (AWS)...
Tokko Broker
Django, Elasticsearch, Tastypie, MySQL, Backbone.js, Underscore.js, Python 2...




Preferred Environment

Unix, Docker, Django

The most amazing...

...thing I've converted is a monolithic product—with no tests or monitoring—into a horizontally scalable product.

Work Experience

Senior Back-end Developer

2020 - PRESENT
  • Involved in the design and implementation of the data structure to hold non-conventional data to give loans.
  • Generated the predictive models with the random forest algorithm to determine if a user is eligible for a loan with no conventional data as an input.
  • Implemented the payment integrations allowing users to complete the loan process.
Technologies: Python 3, Django, PostgreSQL, REST, Amazon Web Services (AWS), Python, APIs, Git, REST APIs, Critical Thinking, SQL, Django REST Framework

Software Architect

2018 - 2020
Real Trends
  • Designed a REST interface that allows users to create and edit websites with the predesigned components.
  • Implemented a workflow to guarantee code quality and coverage. Involved in reviewing my team's pull requests to give the final approval or coordinate changes.
  • Collaborated with the front-end and design team to design products according to the requirements of the stakeholders. Designed the back-end solution to fulfill the front-end needs, estimated the time my team needed, and prepared the tasks in Jira.
Technologies: Python 3, Python 2, DYNAMO, REST, Django, Python, Amazon Web Services (AWS), APIs, Git, Jira, Scrum, Kanban, REST APIs, Critical Thinking, HTML5, JavaScript, SQL, Django REST Framework

Senior Full-stack Developer

2016 - 2018
Tokko Broker
  • Redefined the back end and APIs to escalate and provide a better and more robust service.
  • Defined and implemented the Elasticsearch solution for real-time statistics and pattern searching.
  • Determined and implemented a new tool for searching properties in multiple networks with configurable filters, such as Django for back end, Backbone.js for front end, and Underscore.js.
Technologies: Django, Elasticsearch, Tastypie, MySQL, Backbone.js, Underscore.js, Python 2, Amazon Web Services (AWS), APIs, Git, REST APIs, Python, Critical Thinking, HTML5, JavaScript, SQL, Django REST Framework

Senior Full-stack Developer

2014 - 2016
Sofin Corp
  • Rebuilt the company product from scratch to replace the existing one that was maintained in the meantime.
  • Identified and implemented a queue system to handle actions asynchronously.
  • Integrated the solution with banks in the US and Brazil. Developed the solution slightly differently for each country and adapted the flows as the banks did not provide the same information or flows.
Technologies: Django, PostgreSQL, Celery, RabbitMQ, Amazon Web Services (AWS), APIs, Git, REST APIs, Python, Critical Thinking, HTML5, JavaScript, SQL

IT Manager

2013 - 2014
Rivero SRL
  • Led a multidisciplinary team to provide IT service to the company.
  • Developed and implemented the traceability of the products.
  • Managed the priorities, planned the launches, and made a Python OpenERP customization that simplified, deleted, or altered the flows provided by the framework.
Technologies: OpenERP, Python 3, Unix, Python, Critical Thinking, SQL

Full-stack Developer

2010 - 2013
  • Created the new gameplay for social games by building the data structures in Cassandra and APIs to meet the front-end needs.
  • Acted as the scrum master to drive the development of new features.
  • Implemented the payment gateways integrations with Django and Tastypie.
  • Integrated the art and gameplay, informed the back end to track points, money, and other players' actions and status while acting as the front-end ActionScript developer.
Technologies: Python 2, Cassandra, Flash ActionScript, Tastypie, APIs, Scrum, Python, Critical Thinking, SQL

Python Developer

2006 - 2010
  • Developed and migrated the wireless application protocol (WAP) content downloads.
  • Created and maintained the interfaces to charge mobile downloads.
  • Maintained an old monolithic structure to keep charging users in Venezuela according to the month-to-month variable rules.
Technologies: Python 2, MySQL, Python, Critical Thinking, SQL

Human Resource CRM

A recruiter's tool that allows users to handle multiple company positions with the built-in Django and React.

I played the key role in developing this CRM that provides a Chrome extension to parse and feed the talent pool. With the candidate selected for a position, the recruiter can schedule interviews with the different platform users. The candidate can choose the time according to the configured calendar availability and the user's configuration.
The tool provides a configurable interface to:
• handle different flows for different positions,
• give secret feedback to maintain the interviewers' objectivity while rating the user during the process,
• centralize the communication to provide cohesive feedback,
• communicate about the candidates' state if a position is closed or paused, the candidate is rejected, or the process is slowed down to provide a better experience for everyone, and
• maintain candidate pools for future references.
2000 - 2006

Engineer's Degree in Computer Engineering

National University of La Matanza - Buenos Aires, Argentina


REST APIs, Backbone.js, Tastypie, React, Underscore.js, React Redux


Celery, Git, RabbitMQ, Jira


Django, Django REST Framework, Redux, Flask


REST, Scrum, Kanban


Python, SQL, JavaScript, HTML5, Python 3, DYNAMO, Python 2, Flash ActionScript


MySQL, PostgreSQL, Elasticsearch, Cassandra


Unix, Amazon Web Services (AWS), Docker, Kubernetes, Linode, OpenERP


OOP Designs, User Requirements, System Design, APIs, Critical Thinking, Web Scraping

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