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Isaias – React, Python, Django, experts in Lemon.io

Isaias

From Honduras (UTC-6)flag

Full-stack Web Developer|Senior
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Isaias – React, Python, Django

Isaias is known for his clean, maintainable code and expertise in Test-Driven Development. He possesses a deep understanding of Python internals, excelling in application scaling and infrastructure management. As a problem-solving expert, he tackles complex issues systematically. Isaias also specializes in database optimization and React.js development. His live coding skills make him a valuable asset in dynamic development scenarios. With a background in remote collaboration and an agile mindset, Isaias advocates for rigorous software testing to ensure high-quality results.

9 years of commercial experience in
AI
Consulting services
E-commerce
E-learning
Edtech
Fintech
Printing
B2B
Content creation and licensing
Collaboration tools
CRM
Enterprise software
No-code software
Platforms
SaaS
Web development
Main technologies
React
5 years
Python
8 years
Django
5 years
Additional skills
Typescript
Angular
Node.js
Django REST
Vue.js
Next.js
Express.js
JavaScript
Docker Compose
Cypress
Docker
MongoDB
FastAPI
AWS
Flask
CI/CD
Amazon S3
SQL
OpenAI
GraphQL
PostgreSQL
LLM
MySQL
Direct hire
Possible
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Experience Highlights

Senior Full-Stack Developer
Jan 2025 - Ongoing1 year 1 month
Project Overview

Worked on multiple projects:

  • An E-Commerce with ongoing improvements (check link)
  • An LLM CHAT, purpose-built for cannabis and regulated products with 13 specialized agents (compliance, formulation, operations, etc.) and questions are routed to the right expert automatically. Includes web search with “confidence-gated” results and an industry knowledge base with citations.
Responsibilities:
  • Migrated an e-commerce site from pure Next.js to Next.js + Builder.io combo;
  • Used Builder.io as a Visual + Data CRM, which makes it easier for non-developers to update design and copy, but still have full access to build custom code;
  • Worked on developing LLM solutions to automate the creation of the product listing in Shopify by populating metafields and product descriptions following specific SEO and marketing guidelines.
  • Owned the monetization + usage architecture: designed and implemented Stripe subscriptions for LLM access, entitlements, and per-user/per-org token metering powering the usage dashboard.
  • Built the chat product integration end-to-end: delivered the web chat UI, integrated it with the internal Chat Completions API, and ensured reliability/performance in production flows.
  • Led a production-grade fork of LibreChat: added organization management, chat filtering by org, UI/UX improvements, and seamless navigation into billing/subscription management.
  • Implemented the ads experience: supported a separate advertiser subscription workflow, campaign setup + creative (image) uploads, and adjusted the LLM response layer so contextual ads render correctly without breaking answer quality.
Project Tech stack:
React
Next.js
Supabase
PostgreSQL
LLM
OpenAI
Shopify
GraphQL
Tech Lead
Jan 2025 - Mar 20252 months
Project Overview

Document generation solution for a printing company responsible for producing essential materials for Honduras’ primary elections, where confidentiality and controlled handling of sensitive data were critical requirements.

Responsibilities:
  • Extracted data from the Oracle database to decouple dependencies
  • The data was stored in a SQLite database, and the images directly in files/folders
  • Used FPDF to create the dynamic data, including voters' names, QR codes, and Barcodes
  • Used PyPDF to merge the base template design with the generated data with fpdf
  • Created a JSON schema tied to Pydantic models to configure and decouple some rendering logic from actual business logic
  • Used multithreading to create multiple PDFs at the same time in the least time possible
Project Tech stack:
Python
SQL
SQLite
Oracle SQL Developer
Senior Full-Stack Developer
Apr 2022 - Dec 20242 years 8 months
Project Overview

Internal Custom CRM system to manage agents, merchants, integration with banks, and merchant payment systems.

Responsibilities:
  • Developed a full-stack feature for bulk payments to merchants using ADP
  • Removed unnecessary data and features now managed by NetSuite
  • Refactored the Statement generations due to additions to new data sources in a project using Django with Django REST Framework
  • Created and adjust small project's endpoints in Flask or FastAPI
  • Created a new platform to migrate from legacy Django static pages to react typescript and using APIs from multiple sources like Django REST, flask and FastAPI
Project Tech stack:
Django
Django REST
Snowflake
Vue.js
Handlebars
FastAPI
Flask
Python
React
Typescript
Senior Full-Stack Developer
Feb 2021 - May 20221 year 2 months
Project Overview

B2B SaaS platform designed to streamline the compliance certification process for companies. By automating the workflow end-to-end, the platform minimizes the need for manual intervention, making it easier and more efficient for businesses to achieve compliance.

Responsibilities:
  • Worked for the migration of shared frontend components to an internal library, standardizing design patterns across multiple applications
  • Developed a new integration with Checkr to enhance the company's internal compliance processes
  • Optimized existing integrations with Github Apps and Jira to streamline the company's compliance workflows
  • Integrated Command+K search functionality into the platform, providing users with a more intuitive and efficient search experience
  • Collaborated with the QA Automation Team to develop Cypress tests, contributing to improved code quality and faster release cycles
Project Tech stack:
React
Django
Snowflake
MongoDB
Flask
Senior Full-Stack Developer
Sep 2020 - Feb 20215 months
Project Overview

German software magazine and article blog that features premium content. Catering to software engineers and IT Managers, the platform faced rigorous requirements: an intuitive article editing interface for seamless content management and robust text search capabilities were needed to efficiently search articles by author, date, title, and content.

Responsibilities:
  • Designed a modular and reusable Frontend architecture, aligning it with the blog editing widgets structure utilized in Wagtail, a Django CMS
  • Conducted code reviews focusing on enhancing code readability and reusability, ensuring that best practices were followed throughout the front-end development process
  • Successfully integrated Auth0 for user authentication, automating user creation upon successful payment
  • Developed a custom Auth0 module in Django that allowed for seamless integration with native Django users. This modular design enabled the Auth0 component to be replaced or removed without affecting other modules
  • Adhered strictly to Test-Driven Development (TDD) principles for all contributions, ensuring robust and reliable code
Project Tech stack:
Django
Django REST
Vue.js
Vuetify
Flask
Python
Software Engineer
Jul 2019 - May 202010 months
Project Overview

Proctoring desktop application that enhances academic integrity during virtual exams. The tool restricts unauthorized activities on students' computers, instantly alerting teachers if cheating attempts are detected.

Responsibilities:
  • Resolved database inconsistencies by bridging the gap between DynamoDB and Mongoose, enhancing performance and enabling seamless data management
  • Implemented the integration with Open LMS
  • Introduced advanced tracking features to mitigate cheating, such as monitoring internet searches, note-checking through webcam and AI, and detecting unauthorized window switches
  • Enabled cheat detection if a student wanted to start out the Sumadi App's Electrum Dev Console, improving the tool's overall effectiveness
  • Designed and implemented a feature to detect the use of a second monitor during exams:- The system triggers a warning message, prompting the student to disconnect the additional monitor, thus adding another layer of security to the proctoring process
Project Tech stack:
React
Electron.js
Node.js
MongoDB
MongooseODM

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