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aleksandr sisiov

@aleksandrsisiov

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Senior iOS developer delivering scalable, high‑performance mobile apps with strong CI/CD and architecture skills.

Ukraine

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What I'm looking for

I seek remote roles on distributed teams where I can lead mobile architecture, improve performance and CI/CD, and collaborate cross-functionally to ship reliable, scalable iOS products.

I am a Senior iOS Developer with 14+ years of experience building production mobile apps across fintech, healthcare, real estate, and media, focused on scalable architecture, modular design, and clean testable code.

I've driven measurable improvements: accelerated API integration, reduced crash rates, optimized UI rendering, and delivered low‑latency real‑time streaming and reliable BLE data processing at scale.

I thrive in remote, distributed teams, emphasize CI/CD automation and code quality, and regularly collaborate with designers, backend engineers, and product teams to ship robust iOS products.

Experience

Work history, roles, and key accomplishments

Current

Senior iOS Developer

Current

Software MacKiev

Apr 2025 - Present (5 months)

Contract iOS developer fixing bugs, refactoring legacy code, and improving existing features for a mobile project under NDA.

Swift Objective C Refactoring Debugging XCode CI CD Code Review Legacy Code

iOS Developer

Andersen Lab

Apr 2023 - Mar 2025 (1 year 11 months)

Developed a digital wallet app with P2P transfers and payments; accelerated API integration ~50% and reduced crash rate by 25% through refactoring and automation.

Swift SwiftUI OpenAPI CI CD Firebase Networking Security

iOS Developer

Andersen Lab

Sep 2021 - Apr 2023 (1 year 7 months)

Built and maintained PropertyGuru real estate app serving SG/MY/TH; improved UI rendering speed by 35% and maintained 98% crash-free sessions.

Multimarket Support Swift UIKit Performance Optimization Firebase Multi Market Support MVVM CI CD

Team Lead

ZeusElectronics

Mar 2020 - Sep 2021 (1 year 6 months)

Led mobile team for MusIt real-time A/V streaming; achieved <150ms latency, 99.5% uptime, and reduced reconnection failures by 60% through protocol optimizations.

WebRTC AVFoundation Team Leadership Debugging Cross Platform Coordination

iOS Developer

ZeusElectronics

Jan 2018 - Mar 2020 (2 years 2 months)

Developed healthcare app LiveMetric processing 1M+ BLE events monthly; reduced sync latency 70% with AWS Kinesis and improved battery efficiency by 30%.

Swift AWS Kinesis Performance Tuning Testing

iOS Developer

ZeusElectronics

Jan 2016 - Jan 2018 (2 years)

Built low-latency A/V client for SoundWhale with DAW integrations; reduced A/V sync issues by 40% and worked with native C/C++ audio pipelines and WebRTC.