David Ferreira

Summary

Software Engineering Lead with 16+ years in software, from backend platforms to mobile products, and most of the last decade leading teams and releases. I own architecture end to end, from concurrency and real-time video to release strategy across multiple teams, and I lead its delivery. My work spans automotive (Volkswagen Group), live video (FRiNGE), secure messaging (YEO Messaging), health (Prozis) and smart home (Bosch).

Experience

1. Head of Mobile / Lead iOS Engineer · FRiNGE

   Nov 2025 – Apr 2026

   • Designed and shipped the iOS app end to end as sole mobile lead, with Swift 6, SwiftUI, Agora RTC, Supabase and PostHog
   • Led architecture on Go-Live performance, the camera ↔ Agora handoff and Swift 6 strict concurrency safety
   • Implemented token prefetch and warm-restart flows so going live feels instant and survives flaky outdoor networks

   Swift 6 · SwiftUI · Agora RTC · Supabase · PostHog

2. Lead iOS Developer · Volkswagen Group

   Nov 2023 – Nov 2025

   • Led iOS development for the MAN TGE companion app: architecture, technical roadmap and delivery across releases
   • Defined and enforced Clean Architecture + MVVM standards with strict concurrency safety; drove release strategy within a SAFe Program Increment cadence
   • Started on the CAT Architecture Team, supporting the release pipeline and onboarding new teams org-wide, with tooling in Python, Bash and YAML

   Swift · Clean Architecture · MVVM · Swift Concurrency · APNs · MQTT · Python

3. Lead iOS Developer · YEO Messaging

   Jul 2021 – Oct 2023

   • Built the recipient-verification pipeline with CoreML and ARKit for on-device face recognition, authenticating the person, not just the device
   • Implemented OLM end-to-end encryption, GraphQL APIs and WebSocket-based real-time messaging
   • Architected a hybrid UIKit/SwiftUI codebase in MVVM-C with snapshot testing and Bitrise CI

   CoreML · ARKit · OLM · GraphQL · WebSockets · MVVM-C · Bitrise

4. Lead iOS Developer · Prozis (ProzisGo)

   Apr 2017 – Jun 2021

   • Defined the architecture for ingesting data from multiple wearables (smart scales, bands) into a nutrition inference engine
   • Applied strict TDD with explicit use-case and test-case specifications, building with TCA, RxSwift and Realm
   • Authored an internal SDK consumed by other product teams

   Swift · TCA · RxSwift · Realm · HealthKit · TDD

5. iOS Developer · Bosch

   Mar 2014 – Apr 2017

   • Architected HeatHub, a smart-home app for Bosch’s thermotechnology appliance line: a hybrid Swift/Objective-C/C++ codebase with HomeKit integration
   • Designed a new BLE communication protocol from scratch for ProWater, a water-heater installer app
   • Contributed to the open-source Charts library

   Swift · Objective-C · C++ · HomeKit · BLE

6. IT Consultant · Portugal Telecom

   Jul 2010 – Mar 2014

   • Built an Objective-C macOS product for wireless pen drives that automatically selected the best available network
   • Backend work on an SSO platform (Java, Spring MVC/Security, Hibernate) and a QoS platform (Java, PostgreSQL, Bash)

   Objective-C · Java · Spring · Ruby on Rails · PostgreSQL

Independent products

• Velko· Launching in Portugal · iOS & Android

  Peer-to-peer rental marketplace for water-sports gear: map search, Stripe Connect payments with held deposits, photo-evidenced handovers and real-time chat.

• Nursling· On the App Store · iPhone & Apple Watch

  One-tap breastfeeding tracker. A single App Intent drives the widget, Control Centre, Action Button, Siri, Live Activity and Watch app. No account, no server; 21 languages.

• RidersNow· On the App Store · Android coming soon

  Live map of kite, surf, wing and windsurf sessions at nearby spots, with session chat and an hourly conditions forecast.

• MyLedgerAI· iOS

  Privacy-first, chat-led finance companion using on-device storage, RAG over the user’s own data and Vision OCR for receipts.

Skills

Mobile

Swift 6, Swift Concurrency, SwiftUI, UIKit, Objective-C, App Intents, WidgetKit, watchOS, HomeKit, CoreML, ARKit, Vision

Architecture

Clean Architecture, MVVM, MVVM-C, TCA, modular codebases, internal SDKs, offline-first and on-device data

Real-time & backend

Agora RTC, WebSockets, MQTT, GraphQL, REST, BLE protocol design, Supabase, Postgres, Stripe Connect, Java/Spring

Delivery & quality

TDD, XCTest, snapshot testing, Bitrise, GitHub Actions, Fastlane, Jenkins, release management, SAFe PI planning

Also

Kotlin, Jetpack Compose, Python, Bash, RAG and LLM integration, Claude Code, Codex