Looking for a job

Sebastian Vasquez Grajales

@sebasqz12

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Backend & AI Software Engineer

Colombia

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What I'm looking for

Good fellowship and opportunity to grow

Software engineer with experience in design, develop, and support of software,

hardware, and industrial web projects. Passionate about leveraging technology to

deliver real business value through the integration, implementation, and optimization of

modern IT solutions—from initial design to final product delivery.

I specialize in solving innovation challenges and delivering value to modern projects

through software, cutting-edge technologies, and artificial intelligence, supported by

strong autonomous research capabilities.

Experience

Work history, roles, and key accomplishments

Mobile & Backend Engineer

BlueSkyAI

Dec 2024 - Mar 2026 (1 year 3 months)

Architected and developed 2 AI-powered Nest.js and Next.js applications (mobile and web) deployed in production using PostgreSQL. Built embedded AI inference by integrating ONNX and LLM models (e.g., Gemini, OpenAI, Claude, Whisper) into backend services and managed scalable deployments on GCP.

Flutter Nest.js Next.js PostgreSQL ONNX LLM Whisper Integration Gemini OpenAI Claude GCP System Architecture

Backend & AI Software Engineer

BlueSkyAI

Dec 2024 - Mar 2026 (1 year 3 months)

Architected and developed 2 production NestJS/Next.js AI applications with PostgreSQL and deployed them to cloud environments. Integrated ONNX and LLM models (Gemini, OpenAI, Claude, Whisper) for backend inference and improved scalability and maintainability via modular architecture.

Node.Js NestJS TypeScript PostgreSQL Next.js Flutter AI Integration Onnx GCP Microservices

Backend Software Engineer

GISOSA

Sep 2025 - Nov 2025 (2 months)

Led backend development for RIPS and Electronic Invoicing (FEV) validation systems, ensuring compliance with DIAN and MSPS regulations. Designed PostgreSQL schemas and validation engines and built TypeScript/Node.js services that finalized billing validation procedures by 80%.

PostgreSQL TypeScript Node.js Backend Development Database Schema Design Validation Engines DIAN Compliance MSPS API Integration

Backend Software Engineer

Cinnov

Apr 2025 - Jul 2025 (3 months)

Developed scalable backend services for web and mobile platforms using Node.js and MongoDB. Built an AI-integrated microservice module to improve automated data validation workflows for urban incident management and created API modules that increased project trajectory by 30%.