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Nikolai Annenkoff
Verified Expert in Engineering
Software Engineer and iOS Developer
Henderson, NV, United States
Toptal member since April 2, 2025
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
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
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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