Full Stack & Mobile Developer
I build GPS tracking apps and custom software that businesses run on every day.
Javier Nuñez · React · React Native · NestJS · TypeScript
I’m Javier, a developer from Honduras with 4+ years shipping production web and mobile apps — from the database to the App Store. I lead mobile development for a fleet-tracking company and build operations platforms and SaaS products for small and mid-sized businesses.
4+
Years shipping to production
500+
Vehicles tracked for a single client
Daily
Client platform in use by a U.S. contractor
EN · ES
Bilingual, remote with U.S. & LATAM
Portfolio
Products I’ve built
Real products for real operations. Client screenshots use sample data.
Client project · Web & Mobile
ProductionBrightCoat Ops
BrightCoat Painting & Remodeling, LLC — Austin, TX
Operations platform that replaced the client’s spreadsheets for jobs, properties, employees, invoicing, expenses and payroll. Designed and built end to end as the sole developer, and used daily by the owner in the field.
- Field scheduling by week, property and employee
- Finance: invoicing, expenses and payroll with profit calculation
- KPI dashboard with 7 metrics, 5 charts and alerts
- Role-based access for owner, finance and staff
Company product · Seguridad Móvil GPS
ProductionOptimus CA / MagnoTrack & Optimus Rutas
Fleet-tracking mobile apps used to monitor vehicles, routes and field personnel in real time, published on the App Store and Google Play. Used by clients in Honduras, Guatemala and Nicaragua — 500+ vehicles for a single client. I lead their architecture, development and releases.
- Live vehicle tracking and route history on maps
- Continuous background geolocation
- Dashcam photo reports and automated reporting
SaaS product · CodingIQ
In developmentAssistIQ
Multi-tenant attendance and time-tracking system for Honduran companies, from clock-in to biweekly pay reports.
- Three-tier access: super admin, company admin and employees
- Kiosk clock-in on shared devices with employee code + PIN
- Biweekly hours and pay with day/night rates per company
- Automated per-employee PDF reports
SaaS product · CodingIQ
BetaContaIQ
Multi-tenant accounting platform for Honduran SMBs with general ledger, automatic journal entries, treasury, taxes and reports.
- Automatic journal entries from expenses and sales
- Honduran ISV support (0%, 15%, 18%)
- Treasury, tax and financial reports with dashboard
Frontend · CodingIQ
DemoInventiQ
Billing and inventory interface for Honduran SMBs, built as a component-driven frontend ready to connect to an API.
- Invoicing with CAI and 15% ISV support
- Products, stock alerts and customer records
- Sales, inventory and financial reports with charts
Open-source demos
React Native Tracking Demo ↗
Simulated real-time GPS tracking with route progress and tracking stats.
Realtime Dashboard ↗
SaaS-style dashboard with live metrics, event monitoring and charts.
Check-in Monitoring Dashboard ↗
Check-in monitoring prototype with filtering and media preview.
Services
What I can build for your business
I work directly with owners and small teams: one developer from idea to launch, with clear scope, weekly progress and support after release.
Custom business platforms
Replace spreadsheets and scattered tools with one system built around how your team actually works.
- Jobs, scheduling and field operations
- Invoicing, expenses and payroll
- Dashboards, KPIs and reports
- Roles and permissions
Example: BrightCoat Ops
Mobile apps for iOS & Android
One React Native codebase for both platforms, published and maintained on the App Store and Google Play.
- Native-feeling UI and offline-friendly flows
- Push notifications and camera/photo capture
- Store setup, releases and versioning
Example: Optimus Rutas
GPS tracking & field teams
Know where your vehicles and people are, what they did and when — in real time.
- Live location on maps
- Continuous background tracking
- Route history, visits and speed alerts
- Automated reports
Example: Optimus CA / MagnoTrack
SaaS products & MVPs
Turn your idea into a product customers can sign up for, with a solid base to grow on.
- Multi-tenant architecture
- Auth, roles and admin panels
- REST APIs with NestJS
- Deployment and hosting setup
Examples: AssistIQ, ContaIQ
How we’d work together
- 1
Free call
We talk about your business, the problem and what success looks like.
- 2
Proposal
You get a clear scope, timeline and fixed price before any work starts.
- 3
Build with weekly demos
You see real progress every week and can adjust priorities early.
- 4
Launch & support
I deploy, train your team and stay available for fixes and improvements.
Testimonials
What clients say
“Before working with Javier we ran jobs, payroll and invoicing out of spreadsheets. He built us a web and mobile platform tailored to how we actually work, and now I check jobs, crews and numbers from my phone every day in the field. Reliable, responsive, and easy to work with.”
Experience
Where I’ve worked
Full Stack Developer · Mobile Lead
Dec 2023 – Present
Seguridad Móvil GPS
- Lead developer of two React Native fleet-tracking apps (Optimus CA/MagnoTrack and Optimus Rutas) used by clients in Honduras, Guatemala and Nicaragua, including one account with 500+ vehicles.
- Real-time GPS tracking, route history, speed-limit monitoring, client visits and automated reports.
- Continuous background geolocation with TransistorSoft and map-based UIs for vehicles and field staff.
- Leading the Ant Design v4 → v6 migration of the company’s web platforms.
- Own versioning and releases on the App Store and Google Play as the platform expands into North America.
Independent Full Stack Developer
2025 – Present
CodingIQ (personal brand)
Client work and my own SaaS products for SMBs in Honduras and the U.S.
- Sole developer of BrightCoat Ops, a web + mobile operations platform in daily production use for a U.S. contractor.
- Building AssistIQ (attendance & payroll hours) and ContaIQ (accounting) as multi-tenant SaaS products.
Frontend Developer
Jul 2022 – Feb 2024
Chekku
- Led the migration of a legacy AngularJS platform to React.
- Built a dynamic check-in/check-out system with client-configurable forms.
- Dashboards for visit metrics plus map features with geolocation and markers.
Software Development Intern
Jan 2022 – Jun 2022
Seguridad Móvil GPS
- Internal tools and web apps with JavaScript and Node.js, API development and database integration.
About
How I work
I build products end to end: database and REST APIs with NestJS and Supabase, web apps with React, and mobile apps with React Native, through release on the App Store and Google Play.
Most of my work lives where software meets operations: live GPS tracking, route history, field teams, payroll hours, invoicing and dashboards that businesses rely on every day.
Core skills
Technical stack
Frontend
Mobile
Backend
Data & Cloud
State & Tooling
Contact
Let’s build something together
Pick the path that fits — I usually reply within one business day.
Have a project?
Tell me what your business needs. The first call is free and there’s no commitment.
Or email me: nunez0467@gmail.com
Hiring?
Open to full-time remote roles with teams in LATAM or North America.
Honduras · Remote (UTC-6)