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gisella massiero

@gisellamassiero

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Backend Developer Jr. building Node.js and TypeScript AI agents, including an MCP server for GitHub.

Argentina

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What I'm looking for

I’m looking for my first opportunity as a Junior Backend Developer.

I built NomaPay’s backend as part of a team project, designing its PostgreSQL database and implementing JWT and refresh-token authentication. I also integrated real-time currency conversion and built a Gemini support chatbot with protections against prompt injection.

For the MCP GitHub Agent, I developed five tools with Octokit that let an AI agent create repositories, issues, and commits. I validated inputs with Zod, added automatic retries for errors, and tested the server with Vitest.

I’m certified in Full Stack AI by Henry and am looking for my first opportunity as a Junior Backend Developer. I bring experience as a primary-level teacher, where I designed learning materials and adapted solutions for different students.

Experience

Work history, roles, and key accomplishments

Current

Docente de Nivel Primario

Current

CEBJA N.º 3-117

Mar 2024 - Present (2 years 8 months)

Designed differentiated teaching materials for adults, including adaptations for non-literate and visually impaired students. Planned and implemented integrated projects and medium-term literacy plans.

Planning Adaptability Communication Skills Documentation

Backend Developer (Project)

NomaPay

Sep 2026 - Sep 2026 (0 months)

Designed PostgreSQL database schema and implemented JWT authentication with refresh tokens. Integrated ExchangeRate-API for real-time currency conversion and built a Gemini-powered support chatbot with prompt injection protection.

PostgreSQL JWT NodeJS TypeScript Gemini ExchangeRate API Vitest SQL

MCP GitHub Agent Developer

Henry

Aug 2026 - Aug 2026 (0 months)

Developed 5 tools with Octokit for an AI agent to create repos, issues, and commits on GitHub. Validated inputs with Zod and implemented error handling with automatic retry for resilience.

NodeJS TypeScript MCP Octokit Zod Vitest GitHub

Full Stack Developer (Project)

MateCode

Jul 2026 - Jul 2026 (0 months)

Developed a serverless API with email summaries via AWS SES and email/Google authentication. Implemented CRUD tasks in Firestore with 14 component tests, deployed on Vercel.

React TypeScript Firebase AWS SES Vercel Vitest RTL