Open to opportunities

david osorio

@davidosorio

Senior full-stack developer building scalable reactive microservices and user-facing apps that cut costs and accelerate delivery.

Colombia

Message

What I'm looking for

I want to build scalable reactive microservices and full-stack products that deliver measurable business impact. I’m excited to own REST API work, reliability/observability, and automation that reduces costs while continuously improving delivery and incident outcomes.

I’m a Senior Full-Stack Developer with over 14 years of experience, focused on reactive microservices architecture and building high-impact front-end experiences. I specialize in Java (Spring Boot, WebFlux) and modern web development (Angular and React), with a strong emphasis on scalable REST APIs and enterprise system integration.

In recent work, I implemented AI-driven automated model generation using the Google Studio API, reducing production costs by over 95% and accelerating time-to-market. I also led full-stack delivery of a supplier payment system, optimized MySQL performance in production, automated image uploads with Firebase and Shopify catalog updates, and implemented a disaster recovery strategy with an RTO of less than 40 minutes.

I’ve also led technical support teams and built processes that improve reliability and decision-making—automating workflows via APIs and AI (Salesforce and Intercom), driving KPI dashboards (NPS, CSAT), and improving incident resolution efficiency by over 60% through early error detection and structured escalation.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Developer

Current

Simatex

Jul 2025 - Present (11 months)

Built AI-powered automated model generation using the Google Studio API, reducing production costs by 95% and accelerating time-to-market for new collections. Developed and automated supplier payment processing and integrated e-commerce catalog updates with Firebase/Shopify, plus implemented core-system disaster recovery with RTO under 40 minutes.

Java Spring Boot React MySQL Firebase ETL Disaster Recovery Google Studio API REST APIs

Customer Service Manager

Koronet

May 2024 - Mar 2025 (10 months)

Led Tier 2 technical support teams and resolved critical incidents using code-level diagnostics across JavaScript, Python, React, TypeScript, Vue.js, MySQL, and AWS. Automated support workflows via Salesforce and Intercom APIs/AI, reducing repetitive tickets by 40%, and implemented NPS/CSAT KPI dashboards to drive data-based decisions.

Java JavaScript Python React TypeScript Vue.Js MySQL AWS Salesforce Intercom

Technical Service Manager

Koronet

Jan 2019 - May 2024 (5 years 4 months)

Resolved complex microservices issues with Java, Vue.js/JavaScript, AWS, MySQL, and HTML5, improving incident handling practices. Integrated observability tools (Sentry, Graylog, New Relic) to cut diagnostic time by 40% and implemented early error detection/alerting processes that increased incident-resolution efficiency by 60%.

Java Microservices Vue.Js JavaScript AWS MySQL Sentry Graylog New Relic Incident Response

Product Owner

Kometsales

Jan 2017 - Dec 2018 (1 year 11 months)

Prioritized high-impact product features based on business value and technical feasibility. Wrote user stories from real cases and collaborated with development teams to ensure timely delivery.

Product Ownership User Story Development Stakeholder Management Agile Delivery Requirements Gathering Feasibility Assessment

Full Stack Developer

Kometsales

Jan 2012 - Dec 2017 (5 years 11 months)

Developed scalable features using Java, Spring Boot, HTML5, JavaScript, and MySQL, contributing to core platform improvements. Worked on architectural decisions, unit testing with Mockito, CI/CD deployments, and Linux-based development, following Git/GitFlow and agile practices.

Java Spring Boot HTML5 JavaScript MySQL Mockito CI CD Linux Git Git Flow

Technical Support

Kometsales

Apr 2011 - Dec 2011 (8 months)

Identified technical issues in production and supported user resolution. Acted as a liaison between users and developers to ensure reported problems were understood and addressed.

Technical Troubleshooting Customer Support