Marcio Costa Silva

Marcio Costa Silva

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ABOUT ME
Senior iOS Developer
Senior iOS Developer

Senior iOS Developer specializing in Swift, SwiftUI, and scalable app architecture. Proven track record leading end-to-end projects, integrating analytics, and delivering high-performance mobile solutions for diverse industries. Applies a strong technical foundation to cross-functional teamwork with design and back-end teams.

French, Portuguese, English
Bangkok (+07:00)
Joined May 2019
EXPERTISE
5 years experience
7 years experience
2 years experience
10 years experience
2 years experience

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SOCIAL PRESENCE
EMPLOYMENTS
Senior iOS Developer
Howdy
2024-08-01-Present
  • Developed the Howdy audio communication app from scratch as the sole iOS Developer
  • Designed a scalable app architecture u...
  • Developed the Howdy audio communication app from scratch as the sole iOS Developer
  • Designed a scalable app architecture using MVVM with SwiftUI and implemented a partially server-driven UI backed by API integration and SQS-powered long polling
  • Managed the deployment lifecycle, including App Store Connect configuration, reviewer communication, App Store submission, and TestFlight distribution
  • Integrated Firebase Analytics for product insights and analytics tracking
  • Maintained crash-free sessions above 99.5% while delivering features with evolving specifications
VoIP
Swift
API Integration
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VoIP
Swift
API Integration
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Senior iOS Developer
Mirkat
2021-02-01-2024-08-01
  • Built and maintained Mirkat, a dark web monitoring app protecting users’ online accounts and financial data
  • Owned the ful...
  • Built and maintained Mirkat, a dark web monitoring app protecting users’ online accounts and financial data
  • Owned the full app architecture and implemented all features as the sole iOS Developer
  • Integrated Amplitude analytics via Segment to track user behavior and guide product decisions
  • Implemented in-house A/B testing for onboarding and subscription flows, increasing conversion rates by 10%
  • Created UI tests in Xcode and established CI to automate unit and UI testing before builds
  • Migrated dependency management from CocoaPods to SPM
  • Collaborated closely with a back-end engineer to define and optimize API specifications
  • Localized the app using String Catalogs to support multiple languages
  • Used Alamofire for authentication, error handling, and certificate pinning
  • Contributed to an Agile development process with rapid iteration and evolving requirements
Swift
iOS
API Integration
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Swift
iOS
API Integration
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iOS Developer
Iglu
2019-01-01-2021-02-01
  • Led technical specification, app architecture (MVC/MVVM), and native iOS implementation as the technical lead, driving technical ...
  • Led technical specification, app architecture (MVC/MVVM), and native iOS implementation as the technical lead, driving technical decisions during early-stage product development
  • Developed a video streaming app using ASMR triggers to support user relaxation and sleep
  • Built SwiftUI prototypes with mock data for rapid experimentation and interface design
  • Wrote custom build scripts to prepopulate cache data, reducing first launch time by 30 seconds
  • Created unit and UI tests, integrated them with GitHub CI pipelines and Xcode, and implemented interface localization using Localizable.strings
API
PostgreSQL
Core Data
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API
PostgreSQL
Core Data
Elixir
Swift
iOS
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PROJECTS
Countdown • WidgetView Project
2023
SQLite
UIKit
Swift
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SQLite
UIKit
Swift
iOS
Swift concurrency
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AI Recipe ManagerView Project
2025
SQLite
iOS
OpenAI
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SQLite
iOS
OpenAI
AI
LLM
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