a
arniecalderon

Arnie

@arniecalderon
5.0(1)

Full Stack Engineer Multi Tenant SaaS and Business Web Apps

Peru
English, Spanish
About me
Full-Stack Software Engineer. I build multi-tenant SaaS and business web apps that reach production and stay there. Track record: • Creator and operator of Ventify — multi-tenant POS & inventory SaaS, live in 3 companies (top: 4 branches, 8,000+ products, ~600 sales/day, +97% sales). • 11 months as frontend dev for a Spanish B2B distributor, migrating their mobile sales app to web — team, code review, CI, tests. Stack: React, Next.js, TypeScript, Node.js, Django, PostgreSQL. Milestone-based delivery. Your repo and database in your accounts from day one. Native Spanish, technical English. ... Read more

Skills

a
arniecalderon
Arnie
Offline • 
Average response time: 1 hour

See my services

Custom Websites
I will build a high performance website or landing page using astro
5.0(1)
API & Integrations
I will build custom python django backend api

Portfolio

Work experience

Imprex

Desarrollador Frontend

Imprex • Freelance

Sep 2025 - Present • 1 yr

I develop and maintain the B2B sales force web platform (React 19 + Vite) for a European wholesale distributor, working within a distributed engineering team (mobile, backend, and web). • Built a modular frontend featuring a product catalog, order management, shopping cart, customer and prospect management, sales visits, geolocation-based routing, a form builder, and shipment tracking. • Integrated the platform with over 50 REST APIs (Django backend, SAP ERP) and external services—such as SalesLayer (PIM), Google Maps, and Excel import/export—supporting multi-language capabilities and real-time synchronization. • Led the migration from the native mobile sales app to the responsive web platform. • Work asynchronously using Scrum, including code reviews and testing (Vitest, Testing Library, MSW).

Ventify

Full-Stack Developer & Creator of VENTIFY (SaaS)

Ventify • Self-employed

Aug 2025 - Present • 1 yr 1 mo

Creator and operator of Ventify — multi-tenant POS + inventory SaaS in production for 3 businesses (flagship: 4 branches, 8 POS, 8000+ products, ~600 sales/day, $80k+/month, +97% sales). Built with Next.js 14, React 19, TypeScript, Firebase, RBAC and real-time sync. Created Venty, an autonomous AI business agent (Firebase Genkit, Gemini/DeepSeek, RAG) that answers analytics queries and executes actions inside the POS — experience directly transferable to locally hosted AI models and coding-agent workflows.

1 Reviews
5.0

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Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
1-1 out of 1 Reviews
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    Y

    yeraylb

    ES

    Spain

    5

    Todo perfecto y muy rápido. Explicaciones claras y atención en todo momento. Totalmente recomendado.

    $100-$200

    Price

    3 days

    Duration

    gig

    Custom Websites

    Helpful?
    Yes
    No