React · Next.js · TypeScript

Luz PerezFull Stack Developer

I build web products with React and Next.js, from the screens people use to the systems behind them, and I use AI tools to ship faster without cutting corners.

Currently at Melt Studio, building a CMMS for renewable-energy field service.

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Profile

Luz Perez•Managua, Nicaragua

I'm a full stack developer with more than four years of experience building software that teams rely on every day. My main focus is React and Next.js, and I'm comfortable working across the whole product, from the interface to the systems behind it.

At Melt Studio I've worked on more than seven client products, including a maintenance platform used by more than 12 organizations. I enjoy taking a feature from idea to release, reviewing my teammates' work, and using AI tools to plan, build and review code with care.

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Selected work

Professional and personal builds. Every codebase is private, so each one is presented as a case study.

Private codebase

FeaturedProfessional · Melt Studio

Field-Service CMMS

Fleet and asset maintenance for solar, wind and storage operators.

Problem

Renewable-energy field teams manage work orders, preventive maintenance and dispatch across many sites, often with no connectivity on site, and each customer workspace must stay isolated.

Approach

I contribute across all three layers: a Vue 3/Nuxt 3 web app with Vuex, a NestJS backend built on CQRS and event sourcing over MongoDB with Redis + Bull for background jobs, and a Flutter app (Riverpod, Drift) that lets technicians work offline and sync later. Shipped through Docker, GitLab CI and AWS.

Outcome

Work orders, preventive-maintenance plans, dispatch scheduling and multi-tenant workspace features that technicians and supervisors use every day. The client and codebase are confidential.

Stack

Vue
Nuxt
NestJS
MongoDB
Redis
Bull
Flutter
Drift
Riverpod
Docker
AWS
GitLab CI

Personal project

Family Financial Ledger

Event-sourced trust accounting with exact money.

A household needed a shared ledger where every balance is derived instead of stored, across owners, bank accounts and credit cards, in USD and NIO.

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Approach

I built an event-sourced PWA: FinancialEvent rows materialize into signed LedgerEntry rows via a single posting engine. Money uses Postgres NUMERIC and decimal.js end-to-end. Credit purchases accrue ownership immediately; card payments settle cash without double-counting.

Outcome

Balances stay correct on any day of the billing cycle. The core posting, money, and balance logic is covered by unit tests. The live app and repo remain private.

Next.js
Prisma
PostgreSQL
decimal.js
Zod
Vitest
PWA

Personal project

Wedding & Events Platform

From a single-event RSVP app to a multi-tenant events product.

My own wedding RSVP site worked well, and other hosts wanted the same thing: personalized bilingual invitations, guest management and gift registries, without one codebase per event.

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Approach

I evolved the Next.js + Firebase app into a multi-tenant platform: per-event data and settings, feature tiers, guest CRUD with CSV/Excel import, seating with PDF export, gift registries, and an EN/ES invitation experience built with Radix UI and i18next. Most recently I generalized it beyond weddings so it also runs birthday celebrations.

Outcome

One platform now serves several weddings and birthdays instead of one-off sites. Source and guest data stay private.

Next.js
Firebase
Firestore
Radix UI
i18next
TanStack Table

Personal project

Spende

Mobile-first expense tracker with dual-currency cashflow.

I needed a personal PWA to track expenses across USD and NIO with monthly budgets, category colors, and trustworthy FX conversion.

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Approach

Next.js 16 + Supabase with Zod at every API boundary, historical exchange rates snapshotted onto transactions, USD as the aggregation currency, and a Twitter-dark mobile UI.

Outcome

Installable on phone, with period-scoped cashflow, CSV import and charts, and business logic kept out of components. Repo stays private.

Next.js
Supabase
TanStack Query
Zod
Recharts
PWA

Personal project

Multi-Tenant CRM Activities

Tenant isolation enforced by the database, not the UI.

A CRM activity log shared by several organizations must make it impossible for one tenant to read another tenant’s records, even if application code has a bug.

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Approach

Next.js with Supabase Row-Level Security policies keyed to the tenant, Prisma for the data model, and Zod schemas validating every input at the API boundary.

Outcome

Isolation is enforced in Postgres itself, so every query is scoped to the tenant by default. Repo stays private.

Next.js
Supabase
Row-Level Security
Prisma
Zod

Personal project

Debt & Order Manager

Orders, profits, debts, and receipt uploads in one place.

An operation needed to track purchase and shipping orders, profit, outstanding debt and payments, and store receipt images, without a separate backend server.

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Approach

Next.js App Router with Supabase as the only backend: validated forms (Zod + React Hook Form), debt and payment flows, profit tracking, and receipt uploads to Supabase Storage, with bilingual UI.

Outcome

A production-ready ops tool for orders and receivables. Source and data stay private.

Next.js
Supabase
Zod
React Hook Form
i18next

Personal project

Ticket Inbox

A small, complete full-stack ticketing system.

I wanted a compact project that covers the whole loop (data model, API and UI) without heavy infrastructure.

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Approach

Next.js App Router on top of SQLite: ticket creation, status changes and an inbox view, kept intentionally minimal.

Outcome

A clean, self-contained example of end-to-end full-stack work. Repo stays private.

Next.js
TypeScript
SQLite
Tailwind

Personal project

Personal Portfolio

Bilingual case-study site for private full-stack work.

I needed a deployable portfolio that shows professional and personal work without exposing private repositories or sensitive live apps.

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Approach

Next.js 16 + Tailwind with next-intl (EN/ES), content-driven case studies kept in config and message files, and a separate CV page.

Outcome

A Vercel-ready public site that tells the story of the work while every product codebase stays private.

Next.js
TypeScript
Tailwind
next-intl

Technical skills

Grouped by where I use them. Architecture lists the patterns I’ve shipped in production or personal builds.

◆Frontend16

TypeScript
JavaScript
React
Next.js
Vue
Nuxt
Vuex
Tailwind
Radix UI
shadcn/ui
React Hook Form
Zod
TanStack Query
React Router
HTML
CSS

◆Backend & data13

Node.js
NestJS
Express
TRPC
MongoDB
Mongoose
PostgreSQL
Prisma
Redis
Bull
Supabase
Firebase
SQL

◆Mobile10

Flutter
Dart
React Native
Expo
Riverpod
GetX
Drift
Freezed
dart_mappable
Codemagic

◆Cloud & DevOps12

AWS
S3
ECS / ECR
Lambda
CloudFront
RDS
Docker
GitLab CI
semantic-release
Turborepo
Git
GitHub

◆Quality & tooling7

Jest
Vitest
Husky
Swagger
Sentry
i18next
next-intl

◆AI-assisted development8

Claude Code
Cursor
ChatGPT
Plan mode
Agent skills
AGENTS.md guardrails
MCP
AI code review

◆Architecture & practice10

CQRS
Event sourcing
Multi-tenancy
Row-Level Security
Offline-first sync
Exact decimal money
PWA
Monorepos
Agile / Scrum
CI/CD

◆Languages

SpanishNative
EnglishFluent
JapaneseBasic

Experience

Full Stack Developer · Melt Studio

Jun 2022 – Present

Maintenance & field-service platform (Dec 2024 – present)

Deliver features across a Vue 3/Nuxt web app, a NestJS API (CQRS, event sourcing, MongoDB, Redis + Bull) and an offline-first Flutter app used by field technicians across 12+ organizations.
780+ merge requests merged across all Melt projects and 300+ approvals of teammates' work; built a senior-level AI code-review agent that drafts verified findings as inline GitLab comments.
Built an AI-assistant integration that fills out job forms from what a technician types or dictates, routing every write through CQRS commands with user confirmation and site-scoped permissions.
Led the outage-management module from scoping to release (web register, offline sync, branded emails, legacy-data migrations), plus invoicing improvements.
Shipped 15+ mobile releases through Codemagic and got builds back under the 60-minute limit by trimming a 5.46 GB cache below the 3 GB cap.

Operations-log product, took ownership (Feb 2025 – Apr 2026)

Authored about 70% of the merged MRs on a Next.js + MongoDB operations-log product: shift turnover, check-in/out, audit history, multi-site timezones and SendGrid reports on AWS Lambda.

Earlier work (2022 – 2024)

Returns product (2022 – 2023, 230+ merged MRs): scheduled functions that parsed purchase emails into orders, items and totals, plus React Native/Expo flows and a React admin panel.
AI work (2023 – 2024): survey components feeding an AI activity matcher, and an internal chatbot with a Shopify integration.

Software Engineer Intern · GBM

May 2021 – Mar 2022

Built a React Native app for training results with authentication and image uploads, integrated with backend services in a Scrum team.

Quality Engineering Intern · SIMA-ITS

Jun 2020 – Apr 2021

Tested web and mobile apps across development and production with test cases and exploratory testing, documenting bugs for developers.

Education

Software Engineering · Universidad Americana

Jan 2017 – Mar 2022

Contact

Want to talk about a role or a build? Reach out.

luzpm1102@gmail.com

Location

Managua, Nicaragua

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GitHub

GitHub→

Profile only. Project repositories are private.

Resume

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