Fernando Ballesteros
Full-stack engineer specializing in mobile apps (primarily Flutter) and NestJS backends, with hands-on experience taking products from architecture to production — real-time systems, payment/POS platforms, and consumer mobile apps.
Roughly four years building software at INOWU — primarily Flutter for mobile and NestJS / Prisma / PostgreSQL on the backend, with additional work across React Native (Expo) and native iOS (Swift) and Android (Kotlin).
I'm comfortable taking a project from an idea to a shipped product: designing the architecture, integrating third-party APIs and services, and writing the documentation that keeps a team moving. I care about the parts of engineering that don't show up in a ticket.
Over the last few years I've shipped 10+ production apps across the App Store and Google Play — spanning payment and POS platforms, access control, hospitality tech, and consumer apps. Each one came with its own constraints, and I adapt to a project's existing stack rather than forcing a favorite tool.
That adaptability is deliberate: I've shipped with Node.js, MongoDB, Firebase, MySQL, Payload CMS, and GraphQL as different projects demanded, while keeping Flutter and NestJS as the core I go deepest in.
Live on the App Store and Google Play across fintech-adjacent, access control, hospitality tech, and consumer apps.
Architecture, hardware/API integrations, and documentation — not just writing code to a spec.
Picks up and ships with whatever a project needs — Node.js, MongoDB, Firebase, MySQL, Payload CMS, GraphQL.
Led a Firebase → NestJS/Postgres migration with a dual-write strategy; built real-time and WebRTC features.
A sample of production apps and platforms I've architected and shipped. Featured work is highlighted first.
Real-time restaurant sales dashboard
Lets restaurant owners track real-time sales across one or many locations, with a full range of reports. Includes an AI chatbot that generates those reports from natural-language questions. Owned architecture and delivery end-to-end.
AI study guide & scheduling for K-12
An AI-powered study guide and scheduling app built for a K-12 school, combining generated study material with class scheduling.
Social & events app (US client)
Social and events platform for a US client. Built the matching algorithm and the real-time features that power live interaction between users.
Offline-first point-of-sale platform
Offline-first POS for restaurants: a Windows desktop app for staff plus branded iOS/Android self-ordering apps for customers. Works fully on LAN without internet — unlike cloud-only competitors (Square/Toast/Clover). Deploying to a paying pilot client.
Self-invoicing for restaurant checks
Lets diners self-invoice their check with the Mexican tax authority by scanning a QR code on the receipt. Restaurants pay a subscription for an invoice quota.
Companion app + Android SDK
Consumer app shipped to both stores, with a companion Android SDK published to Maven Central for third-party integration.
Hardware headphone companion
App for a hardware headphone company showcasing their product line, featuring a built-in audio equalizer that tunes output in real time.
B2B dental order management
B2B application for managing dental lab orders — order intake, tracking, and status across the lab workflow.
HR system + public landing page
Built both an internal HR management system and the public-facing landing page for the business — full stack, from data model to marketing site.
Dating app — releasing Dec 2026
A dating app slated for release in December 2026. Landing page live ahead of launch.
Construction company landing page
Marketing landing page for a construction company — clean, fast, and conversion-focused.
Deep in a primary mobile + backend stack, broad across the tools different projects have required. Solid badges are where I go deepest; outlined badges are what I've shipped with as needed.
Also worked with
Also worked with
Also worked with
Also worked with
Open to remote work full-time and contract roles (US, LATAM and Europe). The fastest way to reach me is email.
Available now
Open to remote work full-time & contract roles.