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// Software developer · Fintech & product

Custom software that grows your business.

I build SaaS, dashboards, automations and payment systems for founders and teams. From idea to production.

  • Sites and landings that convert
  • Scalable web apps and SaaS with data and payments
  • Fintech integrations: KYC/KYB, settlement, multi-currency
  • Internal process automation
See projectsBook a free intro call
~/nahuel-soriaAvailable for new projects

const soria = {
  role: "Custom software development",
  based: "Buenos Aires, AR",
  remote: true
}

USD processed across platforms I built
+$20M

USD processed across platforms I built

Products in production / active
6

Products in production / active

Years building software
4+

Years building software

@nahuelsoria
// Proof

Real work, in production

+$20M
USD processed across platforms I built
6
Products in production / active
4+
Years building software
100%
End-to-end technical ownership
  • Next.js
  • Node.js
  • TypeScript
  • PostgreSQL
  • Firebase
  • Vercel
  • Python
  • React Native
View on GitHub
// 01 — Projects

Products I built end to end

Fintech platforms in production and my own products. Each with full technical ownership: architecture, backend, frontend and integrations.

01In production

Bridgewater Payments

B2B fintech infrastructure

End-to-end payments platform for business clients: onboarding, money movement and operations, with correctness and auditability as first-class concerns.

RoleSole technical owner — architecture to production
  • KYC/KYB onboarding with identity verification and audit trails
  • Virtual accounts, fiat off-ramps and a settlement rules engine
  • Operational backoffice for case review and resolution
Stack
  • Next.js
  • Node.js
  • PostgreSQL
  • Firebase
  • Vercel
  • Cloudflare
RepoLive
02In production

Condor OTC

Cross-border payments & exchange

Payments and exchange platform for international operations. Built the financial-provider integrations and the internal desk tooling used day to day.

RoleCTO / Technical Lead
  • Multi-provider integrations isolated behind a common interface
  • Multi-currency operations and OTC/exchange flows
  • Internal tooling for desk operations
Stack
  • TypeScript
  • Next.js
  • Node.js
  • PostgreSQL
RepoLive
03Active

LLM Audit

AI-powered code auditing

A tool that orchestrates LLM agents — each covering one dimension (security, code quality, UX, architecture) — into a single prioritized report.

RoleCreator
  • Specialized agents per review dimension
  • Consolidation into a single prioritized report
Stack
  • Python
  • TypeScript
  • LLM APIs
RepoLive
04MVP

Picaday

Own product — photo journal

Photo-journal app focused on performance and experience. Production-ready MVP.

RoleFounder & developer
  • Guaranteed LCP < 2.5s; E2E testing with Playwright
  • Web Workers for image compression and virtualization
Stack
  • Next.js
  • Firebase
  • Tailwind
  • Playwright
05MVP

Numerai

Own product — personal finance

Multi-currency personal-finance tracker with AI expense capture over WhatsApp and payment integration.

RoleFounder & developer
  • AI expense categorization over WhatsApp
  • Multi-currency (ARS/USD/EUR) and Dodo + MercadoPago payments
Stack
  • Next.js
  • Firebase
  • WhatsApp API
  • MercadoPago
06In production

What I Wish

Own product — social wishlist

App to share wishlists with WhatsApp-driven virality and sub-60-second onboarding.

RoleFounder & developer
  • Onboarding in under 60 seconds
  • Minimal design focused on sharing
Stack
  • React Native
  • Firebase
  • WhatsApp API
Live
// 02 — Services

How I can help

From a landing page to fintech infrastructure. We scope it around your goal.

Landing pages & sites that convert

Clear message, social proof and performance to capture customers.

  • Value proposition and conversion-oriented copy
  • 90+ Lighthouse and baseline technical SEO
  • Forms, tracking and analytics
Most chosen

Custom Web App / SaaS

Scalable digital product with data, auth and payments.

  • Auth, database and admin panel
  • Payments (Stripe / MercadoPago / crypto)
  • Dashboards with metrics, roles and reports

Fintech & payment integrations

Onboarding, money movement and operations focused on correctness and auditability.

  • KYC/KYB and operational compliance
  • Multi-provider and multi-currency integrations
  • Settlement engines and backoffice

Internal systems & automation

Automate manual processes, gain control and traceability.

  • Process mapping and architecture
  • Roles, permissions and reporting/export
  • Integrations with APIs and legacy systems

CTO / Product consulting

Technical direction, audits and a concrete action plan.

  • Code, security and performance audit
  • Architecture and technology roadmap
  • Team mentoring

Every project includes a free 30-minute intro consultation.

Let's start
// 03 — Process

How I work

A clear process, with incremental delivery and constant communication.

  1. 0130 min

    Free consultation

    We go over your project, goals and scope. No strings attached.

  2. 0224–48 h

    Proposal

    Detailed proposal with scope, timeline and price.

  3. 032–6 weeks

    Iterative build

    Sprints with incremental delivery and staging demos.

  4. 0430 days

    Delivery & support

    Launch, measurement and 30 days of included support.

// 04 — About

An engineer who thinks like a founder

I'm Nahuel Soria, a software developer and technical founder in Buenos Aires. I specialize in fintech — payments, KYC/KYB, settlement — and in custom SaaS products.

I work best where the problem is ambiguous, has to run in production, and can't be wrong. I'm the single technical owner behind several payment platforms: I own the architecture, the decisions and the delivery — not just the code.

I also build my own products (Picaday, Numerai, What I Wish) and AI-powered code-auditing tools. I learn fast and solve whatever comes up.

Core stack

  • TypeScript
  • Next.js
  • Node.js
  • React
  • PostgreSQL
  • Firebase
  • Vercel
  • Tailwind

How I work

  • Correctness and auditability first
  • End-to-end ownership, not just code
  • Iterative, measurable delivery
  • Simple decisions that scale

Location

Buenos Aires, Argentina · Remote worldwide

// 05 — FAQ

Frequently asked questions

What people usually ask before we start.

How long does a project take?

It depends on scope: a landing takes 1–2 weeks, a web app 3–6 weeks, and systems or ERPs 6–12 weeks. The proposal includes a concrete timeline.

Do you work with companies outside Argentina?

Yes. I work remotely with founders and teams anywhere, and invoice in USD or ARS.

What stack do you use?

Mostly TypeScript, Next.js and Node.js, with PostgreSQL or Firebase, deployed on Vercel/Cloudflare. I pick based on the project's goals and scale.

How does payment work?

Usually 50% upfront and 50% on delivery. I accept bank transfer, PayPal or crypto (USDT), in USD or ARS.

What does post-delivery support include?

30 days of included support for tweaks and fixes. After that you can take a monthly maintenance plan.

Can I follow progress during development?

Yes. I ship every 1–2 weeks to a staging environment, with updates over WhatsApp or email.

Do you offer ongoing maintenance?

Yes, with monthly plans covering support, improvements and monitoring.

Do you work on regulated fintech projects?

Yes. I've built payment platforms with KYC/KYB, settlement and operational backoffice, focused on correctness and auditability.

// 06 — Contact

Let's work together

Have a project in mind? Book a free 30-minute consultation and we'll assess your idea — no strings attached.