Cong Le (@CongLe)

Principal iOS Developer at Capital One

Currently leading iOS development at one of the UK’s largest digital banks. A seasoned iOS engineer with 9+ years of professional experience building large-scale consumer applications. Passionate about clean architecture, user experience, and mentoring development teams.

Quick Links

💼 Current Role

Principal iOS Developer at Capital One (Dec 2021 - Present)

Leading iOS development for one of the UK’s most innovative digital banks. Working with large-scale consumer applications serving millions of users.

Key Achievements:

🏆 Highest contributor to the iOS repository across the entire team
🏗️ Architecture leadership - tackling challenges with legacy codebases and modernization
🤝 Cross-functional collaboration - working closely with designers, product owners, QA, and services teams
📈 Continuous improvement - driving codebase health and development practices

Technologies: SwiftUI, UIKit, Swift, Objective-C, MVVM, XCTest, CI/CD (Jenkins/Fastlane), Git

🌟 Featured Personal Project

🏆 Anniversary Tracker

Download on App Store

📊 **Over 150k Downloads

5k Ratings at 4.7 ⭐**

Track the number of days you’ve been in a relationship. Set your date and it’ll tell you how many days it has been. My most successful personal project demonstrating end-to-end product development skills.

Technologies: SwiftUI, Core Data, MVVM, Swift
Platform: iPhone & iPad

🚀 Professional Experience Timeline

Principal iOS Developer

Capital One | Full-time
Dec 2021 - Present (3 yrs 7 mos)
Nottingham, England, United Kingdom

Leading iOS development for one of the UK’s most innovative digital banks, working on large-scale consumer applications serving millions of users.

Key Responsibilities & Achievements:

🏆 Highest contributor to the iOS repository across the entire development team
🏗️ Architecture leadership - Pragmatic approach to problem-solving, tackling challenges with architecture, UI, and legacy mixed codebase improvements
📈 Codebase health - Contributing to the continual improvement of the monolithic codebase and its overall health
🤝 Feature champion - Working closely with cross-functional stakeholders including designers, product owners, QA, and services teams
🔧 Technical excellence - Driving development best practices and mentoring team members

English Second Language Teacher

Elitopia - Korean Language Center | Part-time
Dec 2020 - Aug 2021 (9 mos)

Career transition period focused on teaching and personal development.

Senior iOS Developer

Capital One | Full-time
Jan 2015 - Oct 2018 (3 yrs 10 mos)
Greater London, England, United Kingdom

Senior iOS developer role focusing on consumer banking applications and financial services.

iOS Developer

Wonder PL
2013 - 2014 (1 yr)
Greater London, England, United Kingdom

Entry-level iOS developer role focusing on consumer applications and UI development.

My Personal App Portfolio

Personal projects developed alongside my professional career, showcasing full-stack iOS development skills. All apps available on the TeamCong company page.

🏆 Portfolio Highlights

📊 Total Impact:

150k+ Downloads across all personal projects
12+ Published Apps on the Apple App Store
4.7+ Star Average Rating with consistent user satisfaction
Diverse Categories - Productivity, utilities, finance, lifestyle, entertainment

🌟 Featured Success Stories:

Anniversary Tracker: 150k+ downloads, 5k ratings at 4.7⭐
Water them plants: 1k downloads, plant care community favorite
Complete app ecosystem demonstrating end-to-end product development

📊 Professional Profile

📱 Professional Experience: 9+ years iOS development
🏦 Current Role: Principal iOS Developer at Capital One
🏆 Personal Apps: 12+ published applications (150k+ downloads)
🍎 Platforms: iPhone, iPad
⭐ Specializations: Large-scale apps, SwiftUI, Architecture, Team Leadership

🚀 Technical Leadership

Enterprise iOS Development

Large-scale applications serving millions of users at Capital One
Legacy codebase modernization and architectural improvements
Cross-functional team collaboration with designers, product, QA, and backend teams
CI/CD pipeline optimization using Jenkins and Fastlane
Code quality initiatives and development process improvements

Technical Expertise

9+ years professional iOS experience across multiple companies
Architecture patterns - MVVM, Clean Architecture, modular design
Modern iOS development - SwiftUI, Combine, async/await, Core Data
Legacy support - UIKit, Objective-C, mixed codebases
Testing & Quality - XCTest, TDD practices, automated testing
Team leadership - mentoring, code reviews, technical decision making

💻 Core Technologies

Languages & Frameworks

Swift (Expert) - 9+ years professional experience
SwiftUI (Advanced) - Modern declarative UI development
UIKit (Expert) - Extensive experience with traditional iOS UI
Objective-C (Advanced) - Legacy codebase maintenance and integration

Architecture & Testing

MVVM - Preferred architecture for scalable applications
XCTest - Comprehensive unit and integration testing
TDD - Test-driven development practices
Clean Architecture - Separation of concerns and maintainable code

Enterprise Tools

Git (Expert) - Version control and collaborative development
Jenkins/Fastlane - CI/CD pipeline development and maintenance
Agile/Scrum - Cross-functional team delivery methodologies
JIRA/Confluence - Project management and documentation

🎨 Development Philosophy

As a Principal iOS Developer, I focus on:

User-Centric Design: Creating intuitive experiences that delight users
Code Quality: Writing maintainable, testable, and scalable code
Team Collaboration: Mentoring developers and driving technical excellence
Continuous Learning: Staying current with iOS best practices and emerging technologies

🌐 App Store Presence

Personal projects demonstrate end-to-end product development skills alongside professional work. All applications are published under Cong Le on the Apple App Store and showcased on the TeamCong company page.

🔗 View all apps: Apple App Store Developer Page

🏆 Key Achievements & Recognition

Professional Accomplishments

🥇 Highest iOS Repository Contributor at Capital One (current recognition)
📈 Architecture Leadership - Leading modernization of legacy codebases
👥 Team Leadership - Mentoring developers and driving technical excellence
🔧 Process Improvement - Implementing CI/CD best practices and development workflows

Personal Project Success

📱 150k+ Downloads - Anniversary Tracker app success demonstrating product skills
⭐ 4.7 Star Rating - Consistent high-quality user experiences across 12+ published apps
📊 5k+ Ratings - Strong user engagement and satisfaction metrics
🏪 App Store Success - Proven ability to navigate App Store guidelines and optimization

🎯 Career Objectives

Leadership Opportunities

Seeking roles that leverage my unique combination of:

Deep Technical Expertise - 9+ years of professional iOS development experience
Proven Leadership - Current principal-level role with team impact and mentoring
Product Mindset - Understanding of user needs and successful app development
Enterprise Experience - Large-scale application development at major financial institution

Ideal Roles & Environments

Senior/Principal iOS Developer - Technical leadership in innovative companies
iOS Architect - Driving technical strategy and architecture decisions
Team Lead/Manager - Combining technical expertise with people leadership
Product-focused Engineering - Companies prioritizing user experience and innovation

📞 Professional Contact

Ready to discuss senior iOS development opportunities?

I bring a unique combination of deep technical expertise, proven leadership experience, and a track record of successful application development. My experience spans from individual contributor to principal-level technical leadership, with consistent focus on code quality, user experience, and team development.

Contact Information:

Email: anniversarytrackerteamcong@gmail.com
Professional CV: Download CV
Company Site: TeamCong Apps
Personal Site: https://congl3.github.io
App Store: Developer Profile
GitHub: @CongLe
Twitter: @CongLe

Principal iOS Developer with 9+ years of experience building large-scale consumer applications. Currently leading iOS development at Capital One, with a passion for clean architecture, team leadership, and exceptional user experiences.