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Alessio Petrin

Product engineer · London — one material, five forms

Open to part-time & contract

Most engineers hand you a part. I forge the whole thing.

Seven years, nine products, one pair of hands.

Lot 01 · Mobile

Native iOS & Android

Swift and SwiftUI, Kotlin and Jetpack Compose — I built nHabit's Android app solo and co-built its iOS app, replacing the React Native app I had shipped first, with Fastlane release lanes and a 2,400-test safety net.

Native in both stores · 2,400 Android tests · SwiftUI and Jetpack Compose.

Lot 02 · Web

Web platforms that rank and convert

Next.js applications engineered server-first: semantic, fast and obsessive about Core Web Vitals — from CMS-driven brand sites to multi-tenant SaaS with billing and auth.

App Router, server-first · Core Web Vitals as a feature · SaaS, CMS, e-commerce.

Lot 03 · Backend

The systems behind the screens

Go microservices with domain-driven boundaries — nine services on one shared runtime library, about 272k lines with 9,100 test functions, PostGIS geospatial data and Redis running nHabit in production.

Nine Go services · 9,100 test functions · PostGIS and Redis in production.

Lot 04 · Cloud

Infrastructure as code, all of it

AWS estates defined entirely in CDK — 52 stack types across isolated staging and production accounts, a passed disaster-recovery drill, and error tracking and infra monitoring I built in-house.

52 CDK stack types · isolated staging and production · a passed DR drill.

Lot 05 · AI & Data

AI as product, not demo

LLM extraction that collected 17,980 live homes from 2,212 agent websites in one national run, an XGBoost ranker behind a statistical ship gate, commute isochrones and a 26-tool chat assistant.

17,980 homes in one national run · XGBoost ranking · a 26-tool assistant.

Selected work

Three pieces, in the maker's own hand.

  1. nHabit

    2024 — present · PropTech · AI

    An AI-powered rental platform taken from an empty repository to native iOS and Android apps, a web app and a Stripe-billed B2B SaaS — nine Go services, a national listings-acquisition pipeline, an AI assistant and the whole AWS estate. About 9,000 of its 9,800 commits are mine.

    Read the case study
  2. nHabit Agent Platform

    2026 · PropTech · B2B SaaS

    The revenue side of nHabit, built from zero between June and October 2026: a self-service portal for estate agents on Go partner and billing services, with Stripe subscriptions live in production, CRM integrations, a leads inbox and a public REST and webhook API.

    Read the case study
  3. Mealner

    2026 — present · HealthTech · Nutrition

    My own company. A nutrition app that plans your eating, logs it by barcode, photo or plain language, and quietly re-plans the rest of the day when life intervenes — with an honest confidence label on every number. Swift on the device, seven Go services and a 6.7M-food catalogue behind it.

    Read the case study
  4. Aevenna

    2026 — present · Productivity · Wellbeing

    My second company. An offline-first iOS app that helps people turn time into a calm, intentional path toward the life they want: goals decompose into time-estimated tasks that flow onto a daily timeline, synced across devices by a Go service, with end-to-end-encrypted health tracking.

    Read the case study
  5. Caelestis Visions

    2026 · Culture · Events · E-commerce

    A bilingual events platform for a cultural association that stages concerts and cinema in Padova: constellation-drawn art direction, Stripe ticketing that issues signed QR tickets, a shop, and a permissioned CMS, on serverless AWS defined in CDK.

    Read the case study
  6. AetherCore

    2026 · E-commerce · 3D

    A French-first storefront for custom gaming and creator PCs, centred on a React Three Fiber configurator that checks part compatibility as you build, with Stripe checkout, customer accounts, saved builds and an admin dashboard — all defined as code on AWS.

    Read the case study
  7. Jarvis

    2026 — present · AI · Security · Local-first

    A menu-bar macOS assistant that listens for a wake word, reasons with a local model, speaks with on-device neural voices and can read mail, drive the browser and touch files — built around one question: what happens when an agent that reads text it did not write also has hands?

    Read the case study

Open to part-time roles and contracts.

Mobile · backend · cloud · AI

Open to part-time roles and outside-IR35 contracts, remote or London hybrid. Not looking for a full-time move.

Contact

Correspondence

Alessio Petrin · London, United Kingdom — Still Life, one of two views · the other is The Signal