Nikolai is available for hire

Nikolai Annenkoff

Verified Expert in Engineering

Software Engineer and iOS Developer

Henderson, NV, United States

Toptal member since April 2, 2025

Expertise

iOS Swift Xcode Bluetooth Objective-C AWS Google Cloud Development Three.js Node.js Mapbox

Bio

Nikolai Annenkoff is a seasoned iOS developer with 10+ years of experience in Swift, Objective-C, and SDK development. He has built social engagement features, immersive 3D experiences, and real-time applications using AWS, Azure, Bluetooth, and geolocation. A proven leader, he has managed teams, founded a SaaS company, and optimized CI/CD pipelines. With a problem-solving mindset, Nikolai delivers scalable, user-centric solutions that enhance engagement and performance.

Portfolio

Planning Diva

Swift, iOS, Google Cloud, Swipe, Three.js

LitPro

Swift, REST, CI/CD Pipelines, Amazon Web Services (AWS), SDKs, HealthKit, MapKit

Virid Digital

Swift, iOS, Amazon Web Services (AWS), Fastlane, Node.js

Experience

Swift - 10 years
iOS - 10 years
Xcode - 10 years
REST - 10 years
CI/CD Pipelines - 10 years
Fastlane - 8 years
Amazon Web Services (AWS) - 6 years
Bluetooth - 5 years

Availability

Full-time

Preferred Environment

iOS, Swift, Objective-C, Xcode, Amazon Web Services (AWS), Azure, Bluetooth, Fastlane, REST, UIKit

The most amazing...

...app I've built is a 3D visualization tool that displays real-time GPS data layers, enhanced with drone photography for action sports.

Work Experience

Senior iOS Developer

2023 - PRESENT

Planning Diva

Introduced and implemented real-time group chat capabilities, fostering user interactions and a sense of community, which resulted in a 35% increase in user engagement and a 20% growth in monthly active users.
Integrated the App Store and 3rd-party subscriptions, resulting in the acquisition of new paying customers.
Created a 3D interactive environment, offering users immersive event planning tools to recreate unique venues, thereby adding value to an existing suite of tools.

Technologies: Swift, iOS, Google Cloud, Swipe, Three.js

Senior iOS Developer

2020 - 2023

LitPro

Engineered developer-friendly APIs for iOS SDKs, significantly enhancing application functionality used by four international brands.
Implemented a conversion workflow to translate between different geospatial coordinate systems, ensuring complete data uniformity and enhancing data usability.
Built an all-in-one deployment pipeline that reduced the number of builds and deployments from four to one per client-side change, which, in turn, decreased the number of testing cycles for clients by 50%.

Technologies: Swift, REST, CI/CD Pipelines, Amazon Web Services (AWS), SDKs, HealthKit, MapKit

Founder

2019 - 2023

Virid Digital

Managed a team of nine professionals, including developers, designers, artists, and educators, to deliver a high-quality educational product.
Implemented the Agile methodology to streamline development processes and ensure the timely delivery of app features and updates.
Conducted market research and user testing to continuously improve app features and the user experience based on feedback.
Established partnerships with educational institutions and content creators to expand the app's library and broaden its reach.

Technologies: Swift, iOS, Amazon Web Services (AWS), Fastlane, Node.js

Lead iOS Developer

2016 - 2020

Actv8

Integrated Bluetooth, audio fingerprinting, and watermarking technologies to enhance media tracking and retention for clients in the commercial and event-hosting industries.
Developed and maintained several CocoaPods repositories, enhancing client usability.
Managed legacy SDK applications and sample codebases, facilitating easier onboarding for developers and ensuring continued functionality.
Created a production SDK with partitioned frameworks to increase modularity and ease of use, reducing the number of repositories from seven to one shared codebase.
Established a continuous integration pipeline using Fastlane, reducing build times and resulting in a significant increase in team productivity and faster deployment cycles.
Designed client-facing and white-box applications to meet the needs of three separate brands.

Technologies: Swift, iOS, Amazon Web Services (AWS), SDKs, CocoaPods, CI/CD Pipelines, Fastlane, Bluetooth, Audio, GPS

Software Engineer

2015 - 2016

Swenson He

Utilized camera imaging for accurate color temperature detection, enhancing the lighting profile of nearby devices by dynamically adjusting colors based on environmental conditions and nine preset configurations.
Leveraged MQTT for IoT development, ensuring seamless and brokered communication between devices and the cloud.
Integrated Bluetooth capabilities, enabling robust connectivity with 13 unique IoT devices between two eCommerce clients.
Engineered video and social features, enhancing user engagement and app functionality.
Spearheaded mobile eCommerce development, optimizing the user experience and increasing sales conversion rates by creating engaging social features.

Technologies: Objective-C, iOS, AVFoundation, MQTT, Bluetooth, AWS IoT

Experience

Live Immersive Role-playing

https://apps.apple.com/us/app/ravenshadow/id6686408649

I developed an app for live role players, enhancing their understanding of the evolving storyline and immersing them in the environment. Additionally, I created thematic elements that drove user engagement and provided vendors with valuable insights to track interactions.

Skills

Libraries/APIs

HealthKit, CocoaPods, Three.js, Node.js

Tools

Xcode, Fastlane, MQTT, Swipe

Languages

Swift, Objective-C

Platforms

iOS, Amazon Web Services (AWS), Azure, AWS IoT, Mapbox

Frameworks

UIKit, MapKit

Paradigms

REST

Storage

Google Cloud

Other

Bluetooth, CI/CD Pipelines, SDKs, Audio, GPS, AVFoundation, Supabase, iOS Camera

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