Hello, I’m Konstantinos, an experienced iOS developer with a master’s degree in mechanical engineering. I bring two years of professional expertise, coupled with an additional year of voluntary contributions to mobile app development.

This year, I’m embarking on a part-time master’s in Computer Science to further elevate my software engineering proficiency. Committed to delivering top-quality products, I stay updated on the latest iOS technologies and thrive as a collaborative team player.

Skills

iOS Development:
  • Swift
  • Objective-C
  • Xcode
  • UIKit
  • SwiftUI
  • WidgetKit
  • StoreKit
  • CoreData
  • CoreAnimation
  • CoreGraphics
  • Networking (RESTful APIs, JSON, XML)
  • Multithreading and concurrency
  • Unit testing and UI testing
  • Git version control
  • App Store deployment and distribution
  • Performance optimization
  • Memory management
Game Development:
  • C#
  • Unity
  • Godot
Design Patterns:
  • MVC pattern
  • MVP pattern
  • MVP-C pattern
  • MVVM pattern
Programming Languages:
  • Python
  • HTML
  • CSS
  • Fortran
General Development:
  • Debugging and troubleshooting
  • Third-party API integration
  • Custom UI development
  • Agile methodologies
  • SOLID principles

Work experience:

01/12/2023 - current Barcelona, Spain
Freelancer iOS Developer

  • Excel in client communication, effectively translating client requirements into robust and user-friendly iOS applications.
  • Manage projects from initial planning through development to final delivery.
  • Proficient in Swift, SwiftUI, and Xcode, ensuring optimal performance and quality in delivered applications.
  • Continuously update skills, staying current with the latest iOS technologies to enhance proficiency and contribute to project success.
  • Accomplished the development of Rota Widget, the inaugural client project, designed specifically for medical professionals. Leveraging Swift UI, WidgetKit, and StoreKit, the app offers doctors a comprehensive overview of their daily tasks.

01/04/2022 – 01/12/2023 Paola, Malta
iOS Developer CS Technologies

  • Proactively collaborated with a cross-functional team comprising designers, product owners, and iOS developers to comprehensively revamp a significant portion of the app's user interface. Resulting in a remarkable 15% surge in user engagement and heightened maintainability.
  • Actively contributed to an Agile international team, consistently fostering innovation and consistently delivering high-quality results.
  • Conducted over 100 code reviews to ensure strict adherence to coding standards, best practices, and uniformity across the codebase.
  • Implemented unit and UI tests, significantly bolstering app stability and reliability while effectively reducing issues, leading to a seamlessly enhanced user experience.
  • Championed accessibility initiatives, culminating in a remarkable 20% enhancement in app usability for individuals with visual impairments.
  • Played a pivotal role in the successful resolution of over 100 critical bugs, resulting in a commendable 0.2% increase in the crash-free user rating, thereby reinforcing the overall app stability and user satisfaction.
  • Provided indispensable support across the entire app development life cycle, from conceptualization to deployment, ensuring the delivery of seamless user experiences and robust functionality, all within specified project timelines and objectives.

01/12/2021 – 20/03/2022 Athens, Greece
Junior iOS Developer ELTA Courier

  • Conducted in-depth research and successfully implemented cutting-edge iOS technologies.
  • Introduced a user review feature, yielding an impressive 20% surge in user engagement and a notable 30% improvement in user satisfaction.
  • Collaborated effectively on UIKit-based projects, diligently following the MVC architecture and making significant contributions to the development of three key app features.
  • Efficiently utilized Core Data for the storage and management of application data.
  • Undertook extensive code refactoring and resolved critical bugs, leading to a commendable 2% enhancement in the app's crash-free rating.

01/09/2021 – 01/12/2021 Remote, Denmark
Intern iOS Developer Roomkast

  • Played a pivotal role in the design of UI elements and the implementation of critical business logic, achieving a noteworthy 15% completion of the mock app and laying a solid foundation for future development.
  • Key contributor in the design of a substantial portion of the app's user interface, seamlessly integrating crucial business logic.

01/10/2020 – 15/08/2021 Stokmarknes, Norway
Volunteer iOS Developer (ESC) Hadsel Kommune

  • Studied iOS Development through online courses (Udacity) and applied knowledge to develop an app for the local community.
  • Collaborated with fellow volunteers on various projects.

Education:

Masters in Mechanical Engineering, University of Thessaly, Greece

Certificates:

iOS Developer Nano Degree
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