Lead IOS swift mobile developer

Nathan Stoltenberg

Expert iOS Developer

214-***-**** Monument, CO 80132 ******@*********.*** github Linkedin

Dynamic Senior iOS Developer with over 16 years of comprehensive experience in both enterprise and consumer-facing mobile application development. Proven expertise in leading teams through all stages of the development lifecycle, from architecture and CI/CD implementation to user experience enhancements and deployment on the App Store. Skilled in Swift, Objective-C, and automated testing frameworks, consistently driving projects to successful completion while mentoring junior developers. Passionate about leveraging innovative technology to create impactful applications that elevate user engagement and satisfaction.

Skills

●CI/CD Setup and Integration

●Async/Await, Combine

●REST, JSON, API

●Git, Github

●Github Actions, Jenkins

●MVVM, VIPER, MVC, SOLID

●Swift, SwiftUI, Objective-C

●Apple HIG

●Performance optimization

●Junior Mentorship

●Zeplin, Figma, Invision

●Firebase

●XCode IDE

●Agile development

●Automated Testing

●XCTest, XCUITest

●App Store Deployment

●Fastlane

Recommendations

Recommendation from Chief Product Officer at ContentGuard

Recommendation from Product Owner at Sabre Holdings

Employment History

Senior IOS Software Engineer - Cytracom 06/2021 - 03/2025

●Led the native team in rebuilding an existing mobile application with a fresh UI

●Established coding standards, CI/CD Pipelines, and automated testing

●Architected and built the ControlOne Network Tunnel application from the ground up including XCTest and XCUITest suites for automated testing and github actions for continuous integration

●Translated basic design plans into full iOS app frameworks, delegating project components to appropriate team members.

●Estimated work hours and tracked progress using Agile/Scrum methodology.

Volunteer App Developer - Parvati Foundation 04/2022 - 06/2022

●Built a next generation app prototype for the Parvati foundation

●Collaborated with the design team and the volunteer coordinators to meet the requirements laid out in the design document

Senior IOS Contractor - Oscar Technology 07/2021 - 12/2021

●Architected and built an iPhone and Apple Watch app from the ground up, including distribution for beta testing and app store deployment

●Researched and selected code and APIs for integration into development projects.

●Followed Apple's Human Interface guidelines to create products aligned with iOS UI norms.

Senior IOS Developer - Alkami Technology 01/2016 - 06/2021

●As a mobile developer at Alkami, I was a customer focused, iOS Platform expert driving decisions to best serve our iOS apps and the Mobile banking ecosystem

●I implemented the conversion of several mobile web (HTML) widgets to native swift code, providing a more user-driven, platform-specific experience for the more than ten million users of our applications

●Over the course of five years since the formation of the 'Mobile First' initiative within Alkami, our customer’s applications have seen average review scores rise from 2.5 to 4.8 stars

●Instructed junior developers on use of Swift programming language

●Defined and enforced engineering principles, guidelines, and best practices

Lead IOS Developer - ContentGuard 05/2014 - 12/2015

●Owned the iOS releases for the team and integrated code from additional contractors working on the project

●Collaborated with the back-end team on a system API that supported multiple clients

Senior IOS Software Developer - Sabre Holdings 01/2013 - 05/2014

●I worked with the Sabre Travel Network team as tech lead for client side development for iOS

●Coordinated the development of all client side features

●I also installed and managed our local continuous integration server

Mobile Applications Consultant - The Principal Consulting 11/2011 - 12/2012

●I assisted in the design and development of three enterprise iOS applications for two clients as well as multiple trade show demos using SAP and other Web Services

IOS Developer - Fractal Fox Studios 02/2009 - 12/2012

●Wrote the code for several touch based games for iOS and iPad devices

●Compiled all major and minor binary revisions and submitted them to Apple for review and approval to the App Store

●Converted Garden 2 Go Game from the UI-Kit user interface model to the more adaptable cocos2D open source interface, improving load times and package sizes and allowing for the use of sprite sheets, greatly decreasing the workload on our artists

Education

North Central Texas College 01/2006 - 05/2009

Awards

Alkami Technology - Mettle Award 12/2019

This Alkamist is a machine passionately cranking out large quantities of quality code for over 4 years. He loves to tackle the most complex technical problems and has a can-do attitude. We recently had an iOS-related RDC issue that was preventing some customers from depositing checks. We were not able to reproduce this issue. Our FIs were not happy. With a one day notice, he jumped on a plane to go to Enrichment to work with an individual that could actually reproduce the issue. He was able to determine the problem and prepare a solution in a couple of hours. To prepare for a trip like this with very short notice and to flawless execute took courage, determination, and true grit. Mettle! Recently Apple released iOS 13. Several of our vendors had compatibility issues with iOS 13. There was a widespread fear that people who upgraded would not be able to use our RDC feature. The RDC vendor could not supply us with a compatible version until iOS was released. This puts tremendous pressure on the team to quickly build a compatible mobile release. As soon as the vendors provided updates, this Alkamist jumped into action alongside his team exhibiting Mettle to provide an iOS 13 compatible application. With Optimistic Perseverance, he is a strong advocate for architecting the best possible mobile solutions. With Caring Collaboration he remains flexible when necessary. As a Trusted technical leader he exhibits Courageous Innovation. He is driven to make our Native Mobile apps the best apps on the market. And he likes to have real fun because His candy bowls never are empty. Please help me congratulate Nathan Stoltenberg on this Mettle award!

Sabre Holdings - Technology Champion Award 07/2013

Nathan works on the Sabre Red Mobile Workspace and gives the app the high quality that our customers expect. Nathan understands the business needs, reaches across team boundaries to exceed expectations, inspire others and get things done - on time, every time. Nathan “gets it”. He understands mobile app technology deeply, almost intuitively, end-to-end and from many viewpoints.

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