+6 years of experience. I have a bachelor's degree in Science and Systems Engineering. Currently I live in Winnipeg, Manitoba. FullStack Web Developer.
Intuitiva S.A. - Guatemala, Guatemala. (Remotely).
Top Guatemala Company providing ERP & CRM and custom software services. 10 employees. 2000 active users per day. 500 request per minute to the systems.
Development and maintenance in the company's main application, ZAURU, an ERP with over 2,000 active users and all the necessary modules for a business.
Leading and collaborating with a team for custom developments, creating web applications connected to the ERP & CRM main system API.
Designed and delivered 6 full e-commerce sites built with Webstudio, integrated with Payload CMS (fully customized and extended) and CRM APIs.
Architected and built offline-first web applications using Electric SQL and TanStack DB, enabling full functionality without an internet connection.
Adopted and integrated modern tooling including React Router (framework mode), shadcn/ui, TanStack Query, and TanStack DB across new and existing projects.
Extensive client-facing experience conducting requirements gathering sessions with diverse client personalities, including challenging, collaborative, friendly, and demanding stakeholders, developing strong emotional intelligence and professional composure.
AI Highlight: Integrated Google's gemma_q4f16_embedding model to generate embedding vectors for all ERP items; built a search API that vectorizes user queries at runtime and computes similarity scores against the item vectors enabling semantic, fuzzy-text search across online stores beyond exact keyword matching.
Red River College - Winnipeg, Manitoba
Red River College (RRC) is a leading institution in Manitoba, Canada, offering comprehensive educational programs designed to provide students with hands-on, practical skills. The Full Stack Web Development program equips students with the expertise to design, develop, and deploy dynamic web applications.
WEBD-3010: Web Development 3 Focuses on various frameworks used in REST-based Python APIs, CI/CD processes, and cloud-based infrastructure. Students develop a full web application using Python
WEBD-3012: Business Systems Build and Testing Teaches deployment of web applications to production environments, including quality assurance, testing, build tools, and best practices in code deployment. The course culminates in launching a portfolio website.
WEBD-2010: Project Management Fundamentals and Agile Business Analysis Covers project management fundamentals, agile methodologies, and techniques. Students learn to manage customer expectations, collaborate effectively, and ensure products provide business value.
Public Ministry of Guatemala. - Guatemala, Guatemala. (In person).
Branch of the Government dedicated to ensuring compliance with justice in the country. Approx. 70 Tech employees. 1500 active users per day on the platforms.
Led and trained development teams at the Public Ministry to create new modules within applications (ASTREA, AyudaGT) previously developed by the NGO.
Developed a banking interconnection module with SIB (Superintendence of Banks), enabling prosecutors to request bank statements and financial transactions of suspects through judicial orders directly within the application.
Built an integration module with RENAP (National Registry of Persons) to retrieve citizen identification data and personal information for criminal investigations.
Designed and implemented intuitive, dynamic interfaces for MP employees, including an interactive Timeline feature that visualizes the complete criminal history and events associated with each suspect.
Conducted requirements gathering sessions directly with MP stakeholders and end-users to ensure developed features met operational needs.
My name is Oscar René, but everyone calls me Koka. I'm passionate about web development & Teaching. I taught WEBD-3012, WEBD-3010 and WEBD-2010 at Red River College (Winnipeg, Manitoba) as a part-time instructor from May 2024 to June 2025.
Some of my successes include the creation of ASTREA and AYUDA.GT, two systems used nationally in Guatemala for reporting and assisting victims, in collaboration with Justice Education Society and the Public Ministry of Guatemala.
