AI System Architecture & Orchestration
Multi-agent pipelines, LLM orchestration, RAG and eval loops, built to run in production.
Madeira, Portugal · Working worldwide
I'm a product builder. I ship what I start.
Danylo Timofeyev
Founder of redmilk.ai · Senior iOS Engineer
Ten years of iOS since iOS 8 and Swift 2.3: games, apps and services, from a Swiss bank's card platform to a creative app with 5M+ MAU and a real-time game with 1M+ users. I run the full cycle myself: idea, architecture, code, design, release, support. Now building at redmilk.ai.
10years of production iOS
5M+monthly users on Reface
Latest build: Understory
01 / About
Started on Swift 2.3.
Still shipping.
Today I'm a Senior iOS Engineer at CBH Bank (Switzerland), where I own the Cards domain and the Cards SDK shared by three banking apps: secure authentication, certificate pinning, 3DS flows.
Before banking: games, apps and services. Face-swap features at Reface (5M+ MAU), a real-time claw-machine game at Clawee streaming WebRTC to 1M+ users, an AR music app that turns your body into an instrument, telemedicine video apps, and a food-delivery platform for 500K+ users.
Different stacks, same job: one person responsible from the first commit to the App Store. Raketa and Jiggle were built that way; Understory is being built the same way.
- Architecture & modularization
- SDKs & internal tools
- Full-cycle mobile development
- Complex UI & animations
- Reactive programming
- AI integration
02 / The Studio
redmilk.ai — one builder, the full cycle.
My product studio, AI-first. One person accountable for the whole thing; AI agents do the heavy lifting under my direction.
Mobile App Development
Native iOS in Swift and SwiftUI, from scratch or rescued from legacy, carried through release and support. Certificate pinning, 3DS and secure authentication, the same work I do for a Swiss bank.
Backend & Services
Firebase, Cloud Functions and the APIs behind the apps: auth, data, LLM proxies, hosting. The service side of every app I ship.
AI Integration for Business
LLMs wired into real workflows: support, content, operations.
Automation
Pipelines that take people out of repetitive loops: CI/CD, content generation, back-office flows.
Game Development
Game mechanics and real-time play: an AR music app, remotely controlled claw machines over WebRTC.
03 / Selected Work
Shipped, and in the works.
In production — apps I've engineered
Own products
AI · iOS · Coming soon
Understory — Learn Anything
Type anything you're curious about. Understory shows what it's made of — the core idea, the parts, the mechanisms — then a five-question quiz finds the edge of what you know. Every topic you prove grows your knowledge tree. Built on LLM pipelines and a shared content library, so each topic is generated once and served to everyone.
See the app →
Product · iOS
ClearWeek
A weekly planner: the week on one screen, quick capture, home-screen widgets. Designed, built and shipped solo.
View on GitHub →More in the lab
AI content generators, agent harnesses, experiments in mobile and LLM UX. New work lands on GitHub first.
github.com/redmilk →04 / Timeline
Ten years in production.
2024 — Now
Founder · redmilk.ai
Madeira, Portugal
Product studio: games, apps and services.
2024 — Now
Senior iOS Engineer · CBH Bank
Switzerland · remote
Own the Cards domain and reusable Cards SDK across three banking apps. Led full app redesign phases, built a 3DS OTP Notification Center, secure authentication & certificate pinning, GitLab CI + Fastlane releases.
2022 — 2024
Senior iOS Engineer · Reface
Kyiv · remote · 5M+ MAU
Core features and complex custom UI in a creative product with 5M+ MAU. Led the modularization refactor and ran product A/B tests.
2021 — 2022
Senior iOS Engineer · Jiggle
AR music app
Architected an AR-powered music app that triggers sounds with body movement via live camera. Built Editor + Player apps, pose detection, sound-zone mechanics.
2021 — 2022
Senior iOS Engineer · Clawee
Real-time game · 1M+ users
Real-time claw machines over WebRTC + Raspberry Pi. New game modules, VIPER cleanup, rewrote networking on URLSession + Combine, cut compile time, modernized to iOS 13.
2019 — 2021
Senior iOS Engineer · Raketa Delivery
Food delivery · 500K+ users
Built the app from scratch: networking, payments, push, deep links, geolocation, real-time admin control. Integrated McDonald's, KFC and other major partners.
2018 — 2019
iOS Developer · Technorely (CareClix)
US telemedicine
Built doctor + patient telemedicine apps: WebRTC multi-party video consultations, navigation and UX owned by the iOS team.
2017 — 2018
The early years · SheerChain, Major-Food, GNS-IT
Kyiv, Ukraine
First production ML: a car license-plate recognizer with CoreML + Tesseract. Retail e-commerce with dynamic UI patterns, education and delivery apps in Swift & Objective-C. Started with Swift 2.3 and iOS 8.
05 / Tech Stack
What I build with.
Core
SwiftSwiftUIUIKitObjective-CCombineRxSwiftGCDSPM
Architecture
MVVM+CVIPERMVP + CoordinatorModularizationSDK designSOLID
Networking & Data
gRPCRESTWebSocketsWebRTCCore DataRealmFirebase
AI & ML
LLM orchestrationAgent systemsRAGCoreMLML KitClaude / GPT APIs
Delivery
GitLab CIFastlaneXcodeGenXCTestApp Store opsCertificate pinning
06 / Contact
Let's build something
worth shipping.
Open to product collaborations, AI integration work and mobile builds that need one owner, start to finish.