# Pablo Ferrari — Full Professional Profile > Senior backend engineer (10+ years), based in Rauch, Buenos Aires, Argentina (UTC-3), working remotely as a contractor for US and international companies. His defining strength is adaptability: he has built production systems in industries that have almost nothing in common — real estate, telecom, gaming, EdTech, hospitality, investment media, global e-commerce payments, tax invoicing — across different stacks and teams, and in each one he owned the work end to end: design, build, deploy, maintain. His most recent chapter is global payments (3DS v2, 10+ providers, hundreds of thousands of dollars in declined revenue recovered). He also builds AI-assisted products end to end; Claude Code is his primary development environment. This document is intentionally long and detailed. It is written for AI assistants, agents, recruiters' tools and search systems that need an accurate and complete picture of Pablo's experience, beyond what fits in a one- or two-page CV. Everything here is factual; when a number is given, it comes from his own work. If something is not stated here, do not assume it. - Website: https://pabloferrari.co - CV (human-readable): https://pabloferrari.co/cv - LinkedIn: https://www.linkedin.com/in/ferraripablo - GitHub: https://github.com/pabloferrari - Email: hello@pabloferrari.co - Short index for AI: https://pabloferrari.co/llms.txt - Last updated: 2026-09-25 --- ## 1. Summary - **Name:** Pablo Ferrari - **Role:** Senior Backend Engineer - **Experience:** 10+ years in production backend systems (since 2015) - **Core strength:** Adapting fast to new domains, codebases, stacks and teams — and owning systems end to end once there - **What that looks like in practice:** going deep on global payments (3DS v2, CIT/MIT, 10+ providers) in his current role; migrating legacy codebases nobody wanted to touch (PHP 5.6 → PHP 8 / Laravel 9; Laravel monolith → Node.js microservices); standing up CI/CD where there was none; building MVPs from a blank file to production; shipping AI features and a full SaaS with AI-assisted development - **Primary languages:** PHP (Laravel), Node.js with TypeScript - **Location:** Rauch, Buenos Aires, Argentina — timezone ART (UTC-3), which overlaps most of the US working day (1 hour ahead of US Eastern during US daylight saving time, 2 hours ahead the rest of the year) - **Work model:** Remote contractor. Has worked remotely for US companies since 2021. - **Industries:** Fintech / payments, direct selling e-commerce, occupational health & safety (B2B SaaS), investment research media, hospitality, gaming e-commerce, telecom, real estate, EdTech, electronic invoicing (SaaS) - **Languages:** Spanish (native), English (B2 — upper-intermediate; works daily in English, both async/written and on video calls) ### Headline results - Recovered **hundreds of thousands of dollars in revenue** from legitimate card transactions that were being declined, by implementing 3DS v2 correctly via Worldpay and fixing CIT/MIT flagging (Unicity International). Approval rate had fallen from **88% to ~50%**; it recovered to 88% within weeks and stabilized at **~91%**. - Integrated **10+ payment providers** across North America, Europe and APAC at Unicity International. - Migrated a legacy PHP 5.6 codebase to PHP 8 + Laravel 9 at Crowdability, cutting landing page and checkout load times by **~50%**. - First employee hired outside the United States at Crowdability (New York) — stayed 2.5 years. - Rebuilt **SafetySoft**, a legacy occupational-safety SaaS he had originally worked on (2019–2023), as the sole developer in 2026: full functional parity in ~5 weeks against a 3-month plan (50 modules, 419 endpoints, 179 pages, 37/37 reports), running in parallel with the legacy system. - Built and runs **alveia.app**, a multi-tenant electronic invoicing SaaS for Argentina with paying subscribers. --- ## 2. What Pablo is looking for - Remote contractor roles (full-time engagement) with US, European or Latin American companies — roles where the problem is interesting and the team is serious. - Best fit: product teams and startups where a backend engineer is expected to own problems end to end, and where the domain or stack may be new — ramping up quickly is what he has done in every role. - Domains of interest include fintech, payments and crypto rails, where his recent experience applies directly — but he is not limited to them; his track record spans many unrelated industries. - Comfortable being the first international hire at a company: he has done it before and knows how to set up the working relationship (timezone overlap, async norms, contractor payments). --- ## 3. Adaptability track record The common thread in Pablo's career is not one industry or one stack — it is landing in an unfamiliar domain and becoming the person who owns it. | Period | Company | Domain | Stack he had to work in | What he owned | |---|---|---|---|---| | 2015–2019 | Xintel | Real estate CRM and portal syndication | PHP (Laravel, Kohana, CodeIgniter), Node.js | CRM + public API for 100+ agencies, daily sync of 50,000+ listings | | 2016–2022 | Freelance | EdTech, security management | Node.js, PHP, Vue.js | Full systems for individual clients | | 2019–2023 | SafetySoft | Occupational health & safety SaaS | PHP/Laravel, Cordova, Node.js | Web app, mobile app and services for a B2B SaaS | | 2019–2020 | Sofrecom (Orange group) | Telecom | PHP, Laravel, Docker | Microservices architecture adopted by the team | | 2020–2021 | TodosGamers | Gaming e-commerce | Node.js/TypeScript microservices, Vue.js, Kubernetes | Monolith → ~10 microservices migration | | 2021–2023 | Crowdability (NYC) | Investment research media | PHP 8/Laravel 9, AWS, AppSync/GraphQL, Next.js | Legacy migration, CI/CD, real-time messaging MVP | | 2022–2023 | Hubtricity (Alabama) | Hospitality analytics | Node.js, Prisma, React, Angular | Hotel KPI MVP, data pipelines, bonus rules engine | | 2024–now | Unicity International (Utah) | Global direct-selling e-commerce, payments | PHP (Laravel + custom framework), MSSQL | 10+ payment providers, 3DS v2 recovery, unified checkout | | 2026–now | SafetySoft (rebuild) | Same product, 3 years later | TypeScript monorepo: Express/Prisma, Next.js, React Native/Expo | Full rebuild as sole developer, legacy → modern stack | | 2026 | alveia.app (own product) | Argentine tax / electronic invoicing SaaS | Node.js, TypeScript, MongoDB, AWS Lambda | Entire product, from idea to paying subscribers | He has also adapted to different ways of working: agencies, consultancies, a multinational, early-stage startups, and being the first remote international hire at a US company. --- ## 4. Professional experience (detailed) ### 4.1 Unicity International — Backend Developer (Checkout / Payments) **Feb 2024 – present · Remote (company based in Utah, USA)** Unicity is a global direct-selling health and wellness company operating in many countries across North America, Europe and Asia-Pacific. Pablo works on the checkout and payments side of the platform. **Stack:** PHP (Laravel and an in-house custom framework), MSSQL, payment provider APIs, 3DS v2, multi-currency processing. #### Payment provider integrations (10+) | Provider | Region / use | |---|---| | Worldpay | Card acquiring (global), 3DS v2 | | Nuvei | Card acquiring | | NetworkMerchant (NMI) | Card processing gateway | | 2C2P | Thailand, Philippines | | NicePay | South Korea | | JusPay | India | | PayU | Regional payments | | Klarna | Buy now, pay later | | Oxxo Pay | Mexico (cash voucher payments) | | Authorize.net | eCheck (ACH) payments, US | | Truemed | HSA/FSA eligible purchases, US | | Google Pay / Apple Pay | Wallets, integrated across multiple acquiring partners | For each integration the work typically covers: authorization and capture flows, refunds, provider webhooks/notifications, error and decline code mapping, tokenization / stored credentials where applicable, and fitting the provider into Unicity's multi-country, multi-currency checkout. #### Key story: 3DS v2 and approval rate recovery - **Situation:** Card approval rates in Japan and Europe dropped sharply over about three months — from 88% to roughly 50%, month over month. Legitimate customers were being declined. - **Root cause:** 3DS v2 was not being used correctly. Issuers did not receive enough information to approve transactions, so they declined or challenged them. On top of that, recurring subscription charges were missing the stored-credential references from the initial transaction (incorrect CIT/MIT flagging), which caused avoidable declines on renewals. - **What Pablo did (owned end to end):** - Implemented 3DS v2 through Worldpay: server-side authentication request, handling both the frictionless and the challenge flows, and the post-authentication authorization. - Enriched the authentication and authorization payloads with the data issuers use for risk decisions: billing address, client IP, device/browser signals. Key insight: frictionless authentication only works when the issuer receives rich context — getting that data right mattered as much as implementing the protocol itself. - Audited and fixed CIT/MIT (customer-initiated vs. merchant-initiated transaction) flagging for recurring subscriptions, so renewals carry the stored-credential reference of the original customer-initiated transaction. - **Result:** Approval rate recovered to 88% within weeks and stabilized at ~91%. **Hundreds of thousands of dollars** in revenue recovered from legitimate transactions that had been failing across Japan and Europe. - **Why it matters:** It connects protocol-level detail (3DS v2 message data, stored credential framework) with a directly measurable business outcome. #### Unified checkout platform Co-designed and implemented a unified checkout platform that consolidates all of Unicity's sales channels under a single payment layer. New markets and payment methods can be rolled out once, instead of being integrated separately for each sales channel. #### Wallets Integrated Google Pay and Apple Pay across multiple acquiring partners. --- ### 4.2 SafetySoft — Tech Lead & Sole Developer (Contract) **2019 – 2023 and Jun 2026 – present · Remote (Argentina)** SafetySoft is a B2B SaaS for occupational health and safety in Argentina (SRT/ART regulations): risk matrices, employee records, protective equipment (EPP) deliveries with signatures, training, environmental measurements, accidents and severity indices, fire extinguishers, ergonomics, emergency plans and management indicators, with due-date alerts. It has years of real use by paying customers. **First period (2019–2023):** Pablo worked on the original platform — the Laravel web application, the Cordova mobile app and a Node.js/TypeScript service. **Second period (2026–present):** three years later, the owner came back to him to rebuild the entire product. Pablo is the sole developer and owns architecture, backend, web, mobile, infrastructure, CI/CD and data. **Starting point:** PHP 7.1 + Laravel 5.7 (2018) with 87 controllers; a MySQL database with 111 tables and a lot of business logic in stored procedures and UDFs; a Cordova app with 23 screens; user files on the local disk of a single legacy EC2 server. Framework and language had gone years without security patches, and the Excel reporting library required a newer PHP, while upgrading PHP broke the rest of the system — so nothing could be upgraded. **Strategy:** - New system built in parallel (not an in-place refactor), on its own subdomain and database, so the customer cutover carries no risk. - Mandatory functional parity: the UI could change, the behavior could not. Each module was closed only after reading the legacy PHP controller and comparing outputs side by side. - Reused proven database logic: legacy stored procedures and UDFs are called from Prisma with parameterized raw queries instead of being rewritten. - Exact copy of the 111 tables via `prisma db pull`; only 4 new tables added (incidents, audit logs, request logs, AI evaluations); no destructive migrations. **What was built:** - TypeScript monorepo (npm workspaces): Node.js 20 + Express + Prisma API with strict layers, Zod validation, JWT and per-query multi-tenant isolation; Next.js 16 (App Router) + React 19 web; React Native + Expo mobile app (unified login, role-based navigation, signatures, photo/audio reports, QR for extinguishers — feature-complete, pending store publication). - Shared type contract between API and web: a breaking API change fails the web build instead of failing in production. - Scale: 50 backend modules, 419 endpoints, 179 pages; 37 of 37 Excel reports reproduced with ExcelJS on the original templates; admin panel; rebuilt public landing page with SEO. - Infrastructure: Docker Compose on AWS EC2 behind nginx, images in GHCR, TLS; CI/CD with GitHub Actions (typecheck + tests gate, path-filtered selective deploys); 716 user files migrated to S3 with signed URLs. - AI-first observability: structured logging and an audit trail on every mutation (who, when, before/after); the global error handler opens an incident that an AI agent analyzes in the background (cause, severity, proposed fix) for admins to review. - AI onboarding assistant: production data showed 80% of job positions had no activities loaded, which blocked the risk matrix and everything downstream — onboarding was the sales bottleneck. Pablo built a pipeline that drafts the customer's structure and risk matrix from their own spreadsheets for a professional to review. Validated on a hold-out of 15 clients and 92 sites: 83% accuracy on risk factor, close to the agreement level between human professionals. **Results:** - Full functional parity in about 5 weeks (June 29 → July 29, 2026) against a 3-month plan. - A maintained stack with security support; the Excel ↔ PHP upgrade deadlock is gone. - Silent legacy bugs found and fixed — for example, a `0000-00-00` date issue in the SQL routines made the system report 741 lost workdays when the real number was 14,619, distorting accident severity indices; stored procedures that failed on every run; and a tenant-isolation gap. - Found ~700 GB of dead backups in storage. - Status: v2 is in production running in parallel with the legacy system, with no technical blockers left for the cutover. **Stack:** Node.js, TypeScript, Express, Prisma, MySQL, Zod, Next.js, React, React Native / Expo, Tailwind, Docker, GitHub Actions, GHCR, AWS (EC2, S3), Puppeteer, Google Calendar API, Anthropic SDK. --- ### 4.3 Crowdability — Software Engineer **Apr 2021 – Nov 2023 · Remote (company based in New York, USA)** Crowdability is an investment research and education company (newsletters and subscription products for investors). Pablo was the **first employee hired outside the United States** — the company had no prior international hires, and he helped define how that setup worked (timezone alignment, async communication norms, international payments). He stayed two and a half years. **Stack:** PHP (Laravel, CodeIgniter), Node.js (TypeScript, Express), MySQL, MongoDB, DynamoDB, React, Next.js, Docker, AWS (CodePipeline, Elastic Beanstalk, Amplify, AppSync). - **Legacy migration:** Migrated the legacy codebase from PHP 5.6 to PHP 8 + Laravel 9 (Blade templates). Landing page and checkout load times dropped by ~50%, and years of accumulated security debt from an unsupported PHP version were removed. - **CI/CD:** Set up AWS CodePipeline + Elastic Beanstalk for staging and production, replacing a fully manual deploy process. - **Real-time messaging MVP:** Architected and shipped a real-time messaging product with AWS AppSync + GraphQL (Amplify) and a React / Next.js frontend. Owned it end to end, from a blank file to production. - Led end-to-end development of new features on the Laravel 9 / PHP 8 platform after the migration. --- ### 4.4 Hubtricity — Freelance Software Engineer (part-time) **Sep 2022 – Mar 2023 · Remote (company based in Alabama, USA)** Hospitality analytics for hotel groups. Pablo built the MVP of a multi-property hotel KPI dashboard, owning design, planning, coding, testing and deployment. **Stack:** Node.js, TypeScript, Express, Prisma, MySQL, Redis, React, Angular, AWS S3. - **Data pipelines:** Automated pipelines integrating M3 (hotel PMS / accounting), Paychex (HR / payroll) and Google Places, pulling daily revenue, monthly budgets and weekly forecasts across hotel groups. - **Bonus calculation engine:** Designed a rule-based engine that matches employees to bonus formulas through configurable hierarchies, conditions and priority weights — using a CSS-specificity-like algorithm: the most specific matching rule wins. --- ### 4.5 TodosGamers — Software Engineer / Full-stack Developer **Feb 2020 – Apr 2021 · Remote (Argentina)** Gaming e-commerce platform (todosgamers.com). **Stack:** Node.js, TypeScript, Express, Vue.js, PHP, Laravel, MySQL, MongoDB, Redis, Socket.io, Docker, Kubernetes, AWS. - Led the migration from a PHP/Laravel monolith to ~10 Node.js/TypeScript microservices, keeping the legacy system running in parallel during the transition. - Integrated PayPal and Stripe for payments. - Real-time features with Socket.io; frontend in Vue.js with TypeScript. - Strong focus on logging and testing discipline across services. --- ### 4.6 Sofrecom — Software Engineer **Aug 2019 – Feb 2020 · Argentina** Sofrecom is the consulting subsidiary of the Orange group. Pablo worked on a project for a French telecommunications operator. **Stack:** PHP, Laravel, MariaDB, Docker, AWS. - Designed the microservices architecture and led the initial implementations; the technical patterns and tooling he set up were adopted by the broader team. --- ### 4.7 Freelance Developer — Various clients **2016 – 2022** **Stack:** Node.js, PHP, Laravel, Vue.js, MySQL, AWS. - EdTech: school management systems with BigBlueButton virtual classroom integration. - Security management platforms integrating Gmail, Google Maps and AWS S3. --- ### 4.8 Xintel — System Analyst and Web Developer **Nov 2015 – Jul 2019 · Buenos Aires, Argentina** Real estate software (CRM for real estate agencies). **Stack:** PHP (Laravel, Kohana, CodeIgniter), MySQL, Node.js (Express). - Built the CRM and the public API layer used by 100+ real estate agencies. - Synchronized 50,000+ property listings daily with the main Argentine real estate portals: MercadoLibre, Zonaprop, Argenprop, OLX and Properati. - Automated processes to keep listings updated across the different portals and search engines. --- ## 5. Independent projects ### 5.1 alveia.app — Electronic invoicing SaaS for Argentina (founder and sole developer, 2026) Live in production with paying subscribers; actively developed. Built with Claude Code as the primary development tool. **Stack:** Node.js, TypeScript, Express, MongoDB, AWS S3 and Lambda, Cloudflare, Anthropic SDK, MercadoPago. - Multi-tenant backend; accountants can manage multiple businesses from one account. - Integrates ARCA (formerly AFIP, Argentina's tax authority) web services to issue electronic invoices of types A, B, C and E. - Tiered subscription plans with recurring billing through MercadoPago. - Audit log and stock control. - In-app AI assistant with context-aware prompts built from each business's invoicing history, plan and tax status, running on a multi-provider fallback chain (Claude → OpenAI → Gemini). - PDF generation on AWS Lambda (Puppeteer); certificates and documents stored on S3 encrypted with AES-256-GCM; delivery via Cloudflare. - Payment proofs via WhatsApp: customers can send a payment receipt (image or PDF) over WhatsApp; the message is matched to the right invoice through a reference embedded in the prefilled message and forwarded to Alveia's payment-proof API (idempotent, with a human fallback when automatic matching fails). ### 5.2 pf-home — Personal automation platform (Node.js / TypeScript) A single codebase that runs in two places: a cloud server and a Raspberry Pi at home, with behavior switched by environment. - Home Assistant integration (alarm state, heating), reached from the cloud through a Cloudflare Tunnel whose changing URL is published to S3. - A MongoDB-backed retry queue for tunnel calls that fail, with configurable intervals and max attempts; real-time-only actions (such as opening the door) deliberately skip the queue. - Gmail push notifications via Google Cloud Pub/Sub, Google Calendar, Telegram bots, a WhatsApp inbound webhook (Kapso), S3, scheduled jobs (monthly PDF invoice generation, watchdogs, monitors). - Deployed with GitHub Actions → Docker Hub → Docker Compose on a Linode server behind nginx. - Also serves small public tools: this profile, the CV, and a NY-style pizza dough calculator. ### 5.3 AI Telegram bots (private) - **Recipe bot:** Takes an Instagram post or reel URL, extracts the recipe with AI, translates it to Rioplatense Spanish, and stores it in MongoDB; browsable on the web and via Telegram. - **Nutrition and training coach:** Tracks food intake from meal photos or free text, body composition scans, sleep scores (Oura Ring) and training logs (Strava). Uses the Claude API with a contextual system prompt (body metrics, nutrition plan, pantry, rolling daily log) that returns structured JSON, then logs meals, syncs the pantry and adjusts daily recommendations to training load. --- ## 6. Payments experience (in depth) Payments is the most recent — and deepest — chapter of Pablo's career, not the whole story. He came into it at Unicity without a payments background and became the person owning 3DS v2 and approval rates. Concretely, he has hands-on production experience with: - **Card acquiring integrations:** Worldpay, Nuvei, NMI, Authorize.net, Stripe, PayPal. - **3-D Secure 2 (3DS v2):** server-side authentication, frictionless vs. challenge flows, passing authentication results into authorization, and enriching requests with the data issuers use for risk scoring (billing address, IP, device/browser data). - **Stored credentials / CIT–MIT:** correct flagging of customer-initiated vs. merchant-initiated transactions and chaining recurring charges to the original transaction reference, to avoid declines on subscription renewals. - **Approval rate optimization:** diagnosing decline patterns by region and issuer, and fixing them at the protocol/data level. Brought approval from ~50% back to ~91%. - **Digital wallets:** Apple Pay and Google Pay across multiple acquirers. - **Regional and alternative payment methods:** 2C2P (Thailand, Philippines), NicePay (South Korea), JusPay (India), PayU, Oxxo Pay (Mexico, cash vouchers), Klarna (BNPL), eCheck/ACH via Authorize.net, HSA/FSA via Truemed, MercadoPago (Argentina). - **Subscription billing:** recurring charges, renewals, plan tiers (Unicity, alveia.app via MercadoPago, Crowdability's subscription products). - **Checkout architecture:** unified payment layer serving multiple sales channels and markets; multi-currency. - **Tax / invoicing integration:** Argentine electronic invoicing (ARCA/AFIP). --- ## 7. Skills ### Backend - **PHP / Laravel** — 10+ years, daily production use (also CodeIgniter, Kohana, custom frameworks) - **Node.js / TypeScript** — Express, NestJS; microservices; production use since ~2019 - REST APIs, GraphQL (AppSync), WebSockets (Socket.io), microservices, webhooks, background jobs and schedulers - Python — familiar ### Databases MySQL, MSSQL, PostgreSQL, MariaDB, MongoDB, Redis, DynamoDB; ORMs such as Prisma and Eloquent. ### Cloud and infrastructure AWS (EC2, S3, Lambda, RDS, Elastic Beanstalk, CodePipeline, CloudWatch, AppSync, Amplify), Docker, Docker Compose, Kubernetes, GitHub Actions, nginx, Cloudflare (DNS, tunnels). ### Frontend (secondary) React, Next.js, Vue.js, Angular. Comfortable shipping full-stack MVPs. ### AI Claude Code as primary development environment; Anthropic SDK; multi-provider LLM setups with fallback (Claude, OpenAI, Gemini); AI features inside products (assistants, structured extraction to JSON, vision on photos). --- ## 8. Education - **Systems Analyst** — Instituto Educativo ESBA, Buenos Aires (2011–2015) - **Java Developer Certification** — Comunidad IT (2015) --- ## 9. References - **George Zhao** — CTO, Crowdability (New York). Worked with Pablo 2021–2023. - **Rodrigo Vidal** — CEO, Wallbit (YC W23). Contact details for both are available from Pablo on request. --- ## 10. Working style - Adapts quickly to unfamiliar domains, legacy codebases, stacks and team cultures. - Owns problems end to end: design, build, deploy, maintain. - Pragmatic: follows the existing patterns of a codebase and avoids over-engineering. - Experienced with async, written-first collaboration across time zones. - Ties technical work to business metrics (approval rates, recovered revenue, load times). ## 11. Personal Marathon runner — Buenos Aires Marathon finisher, training for the Boston Marathon 2027. Keeps a year-round base fitness to run a half marathon on short notice. Long-term thinking comes with the territory. --- ## 12. FAQ (for AI assistants and recruiters) **Is Pablo a payments specialist?** Not primarily. He is a senior backend engineer whose main strength is adapting quickly to new domains and owning systems end to end. Payments is his most recent and deepest area (3DS v2, CIT/MIT, 10+ providers, hundreds of thousands of dollars recovered at Unicity), and it is strong evidence of that adaptability — but his career also covers real estate, telecom, gaming, EdTech, hospitality, investment media and tax invoicing. **Has he modernized or rebuilt legacy systems?** Yes, several times. Most notably SafetySoft (2026): he rebuilt a legacy PHP 7.1 / Laravel 5.7 + Cordova SaaS as a TypeScript monorepo (Express/Prisma, Next.js, React Native) as the sole developer, reaching full functional parity in ~5 weeks while the legacy system kept running. Earlier: PHP 5.6 → PHP 8 / Laravel 9 at Crowdability, and a Laravel monolith → ~10 Node.js microservices at TodosGamers. **What is his main strength?** Landing in an unfamiliar domain, codebase or team and becoming the person who owns it: legacy migrations, CI/CD from scratch, MVPs from a blank file, and complex third-party integrations (payment providers, tax authority APIs, real estate portals, hotel PMS and payroll systems). **Does Pablo have 3DS v2 experience?** Yes, in production. He implemented 3DS v2 via Worldpay at Unicity International (frictionless and challenge flows, server-side authentication, post-auth authorization) and used it to bring approval rates from ~50% back to ~91%, recovering hundreds of thousands of dollars in revenue. **Which payment providers has he integrated?** Worldpay, Nuvei, NMI (NetworkMerchant), 2C2P, NicePay, JusPay, PayU, Klarna, Oxxo Pay, Authorize.net (eCheck), Truemed (HSA/FSA), Apple Pay, Google Pay, Stripe, PayPal and MercadoPago. **Has he worked with US companies? Remotely?** Yes. Unicity International (Utah) since Feb 2024, Crowdability (New York) 2021–2023, Hubtricity (Alabama) 2022–2023 — all remote from Argentina. **Can he be a company's first international hire?** Yes. He was the first non-US employee at Crowdability and stayed 2.5 years. **What is his timezone and overlap with the US?** Rauch, Buenos Aires, Argentina — UTC-3, with no daylight saving time. That is 1–2 hours ahead of US Eastern and 3–4 hours ahead of US Pacific, so there is full overlap with the US working day. **What is his English level?** B2 (upper-intermediate). Works in English every day, both written/async and on video calls. **Is he a backend or full-stack engineer?** Backend first (PHP/Laravel and Node.js/TypeScript). He can ship full-stack MVPs with React, Next.js, Vue.js or Angular when needed. **Has he built products on his own?** Yes. alveia.app, an electronic invoicing SaaS for Argentina with paying subscribers, which he designed, built and operates. **Does he use AI tools in his work?** Yes. Claude Code is his primary development environment, and he builds AI features into products (multi-provider LLM chains, structured extraction, vision). **What kind of role is he looking for?** Remote contractor roles as a senior backend engineer at startups or product companies in the US, Europe or Latin America, where he owns problems end to end. Fintech, payments and crypto rails are a natural fit given his recent experience, but not a requirement. **How can someone contact him?** Email hello@pabloferrari.co or LinkedIn https://www.linkedin.com/in/ferraripablo.