Jostin Vega
Jostin Vega

Fullstack Developer and AI Engineer

Actively looking · Member since 10 Oct 2026
Location
Quito, Ecuador
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Junior

About

Professional summary

I am a Computer Science Engineer specializing in software architecture, DevSecOps, and applied artificial intelligence. I build robust B2B transactional systems across the full development lifecycle, combining backend engineering with dynamic frontend interfaces.

I have hands-on experience with C#/.NET, Golang, Python, Node.js, Next.js, Angular, MongoDB, and PostgreSQL. My architecture approach is grounded in Hexagonal Architecture, Domain-Driven Design, CQRS, SOLID principles, and clean software design.

I design AI-enabled engineering solutions, including Retrieval-Augmented Generation systems, vector search, multi-agent architectures, and LLM-assisted development workflows. I have integrated Gemini and Claude models to improve automated QA and software delivery processes.

I prioritize secure software development practices through API-level role-based access control, Content Security Policy configuration, injection prevention, OWASP awareness, and shift-left testing. I also have experience identifying vulnerable data flows and orchestrating end-to-end automated tests.

I am comfortable working in agile environments using Scrum and XP practices. I bring technical leadership, clear documentation, stakeholder communication, analytical problem-solving, and a continuous-learning mindset to emerging technologies.

Skills

35 capabilities

Tech stack & tools

Working toolkit

Data Stores

Development

Experience

Career history

Fullstack Developer Grupo KFC Ecuador

I develop and implement B2B transactional systems using C# and .NET on the backend, applying Hexagonal Architecture principles. I build dynamic frontend interfaces with Next.js to support efficient business workflows.

I orchestrate automated QA processes and validate business rules to identify vulnerable data flows in MongoDB Atlas. I implement DevSecOps controls including CSP policies, injection prevention, and API-level RBAC, while integrating Gemini and Claude LLMs into development and automated QA workflows.

Freelance Fullstack AI Developer Grupo KFC Ecuador

I designed multi-agent architectures integrated with Google Antigravity and Claude Code to automate software development activities. I created autonomous agents capable of generating complete technical architectures.

I applied DDD, CQRS, Hexagonal Architecture, and SOLID principles to agent-generated solutions. I also transformed refined user stories into structured prompts for high-quality technical delivery and asynchronous deployment through Model Context Protocol.

Backend Development and AI Integration Intern Grupo KFC Ecuador

I built a RAG search engine in Golang using Hexagonal Architecture and MongoDB for vector indexing and cosine similarity calculations. The solution supported retrieval workflows for code repositories.

I optimized NLP preprocessing by applying selective lowercasing and avoiding destructive lemmatization to preserve the structural semantics of source code. I also maintained and developed frontend workflows in Angular.

Education

Learning history

Escuela Politécnica Nacional

Computer Science Engineer, Computer Science

Degree in Computer Science Engineering.

Institución Educativa Fiscal Cumbayá

Technical High School Diploma, Computer Science

Technical secondary education in computer science.

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