Julian Tolosa Backend Developer

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Back End Developer

TABi Connect, Tabi Connect By Hubtek-Medellïn

Nov 2022 - Current (3 years 7 months)

Stack: Python (FastAPI), AWS (Lambda, SQS, EventBridge, ECS, Cognito, DynamoDB), Terraform, Docker, Selenium. Enterprise API Integration & Backend Development: Designed and implemented over 10 reusable REST/SOAP API integrations specifically for transportation systems (TMS) and rate engines using Python and FastAPI. Applied resilience patterns such as exponential retries and asynchronous HTTP clients to ensure robust data handling. Cloud Architecture & Modernization: Led the architecture and migration of automated processes from legacy proprietary RPA platforms to a cloud-native, serverless, event-driven architecture on AWS. Utilized AWS Lambda, SQS, EventBridge, and ECS to create scalable solutions. Infrastructure as Code (IaC): Managed

Back End Developer

Aguayo

Mar 2022 - Nov 2022 (9 months)

Stack: Python (Django, Wagtail), Docker, PostgreSQL. CMS Platform Development: Maintained and enhanced the backend of a CMS-based educational platform using Wagtail and Django, focusing on robust user management systems. Process Optimization: Optimized academic workflows and resource access controls by course and subject, improving the efficiency of the educational website. DevOps & Environment Management: Implemented reproducible development and production environments using Docker Compose to standardize workflows and reduce deployment friction.

Developer

Shareppy Internacional

Nov 2021 - Feb 2022 (4 months)

Stack: Python, Selenium, T-SQL. Test Automation: Implemented automated End-to-End (E2E) testing using Selenium and Python, specifically targeting critical microcredit flows to ensure platform stability. Database Development: Developed and maintained T-SQL stored procedures required for generating regulatory financial reports. Production Support: Provided technical support for production environments, troubleshooting and resolving complex database-related issues.

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Full Stack Python Developer

GRUPO EMPRESARIAL MAYORAUTOS

Apr 2021 - Oct 2021 (7 months)

Stack: Python (Django), JavaScript, HTML5/CSS3, Memcached, Bootstrap. Internal Application Development: Developed a modular internal web application using Django to support the Mazda Colombia dealer network. Modules included a news system, dynamic forms, contact directory, dashboards, and a learning platform. Access Control: Implemented an advanced permission system offering granular control over modules and user actions to ensure data security. Performance Optimization: Integrated Memcached to optimize application performance and significantly reduce database load. Frontend Development: Created responsive user interfaces using vanilla JavaScript, HTML5, CSS3, and Bootstrap. Operational Efficiency: Facilitated better interdepartmental

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