Alex Sheiko

Senior Mobile Engineer

Threshold Brands

Mar 2024 - Mar 2026 (2 years 1 month)

• Developed mobile application for MaidPro Go, a field operations platform serving professional residential cleaning technicians across 200+ franchise locations throughout North America • Mentored 2 junior developers through structured code reviews and onboarding sessions, accelerating ramp-up time and reducing bug rate in their deliverables • Implemented GPS-verified clock-in/clock-out and real-time location tracking, enabling franchise operators to monitor field activity and verify job site attendance with precision • Built offline-capable data synchronization architecture ensuring uninterrupted access to schedules, work orders, and client notes in low-connectivity environments, syncing automatically upon reconnection • Integrated push no

Fintech Application Developer

HitPay

Jan 2024 - Apr 2025 (1 year 4 months)

Added new features to enhance user engagement and streamline payment processes, resulting in a 20% increase in user retention. Implemented automated testing frameworks, reducing manual testing time and increasing code reliability. Refactored legacy code to improve app performance and maintainability, leading to a 25% reduction in crash rates.

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Mobile Engineer Contractor

Dreamboards

May 2023 - Feb 2024 (10 months)

• Developed cross-platform iOS and Android AI storyboarding application for Dreamboards, enabling filmmakers and advertising agencies to generate professional-quality storyboards from text descriptions and script inputs • Integrated Firebase Cloud Functions as serverless AI generation pipeline, orchestrating text-to-image API calls and delivering generated storyboard assets in under 8 seconds per scene • Implemented Firebase Storage architecture for storyboard asset management, supporting multi-scene projects with versioned outputs and real-time collaborative review workflows • Built Google Sign-In and Sign in with Apple authentication flows using Firebase Auth and go_router, achieving a 42% reduction in onboarding drop-off compared to emai

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Mobile Engineer Contractor

Cashews

Aug 2022 - Apr 2023 (9 months)

• Developed personal finance mobile application for Cashews, a subscription-based budgeting app connecting to 12,500+ financial institutions for automated transaction aggregation and analysis • Integrated bank account linking infrastructure enabling read-only access to user financial data, powering real-time "Spendable" balance computation that updated dynamically with each new transaction • Implemented machine learning-driven recurring expense detection engine that automatically classified transactions across weekly, bi-weekly, monthly, quarterly, and annual cycles, reducing manual categorization effort by 80% • Built interactive cashflow visualization dashboards rendering 12-month income and spending trend graphs that increased user sessi

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AI Software Engineer

Dreamboards

Feb 2022 - Dec 2023 (1 year 11 months)

Led API integration for the AI shot maker frontend, delivering a production-ready application that enabled real-time shot generation and feedback. Successfully bridged UI and backend logic, ensuring high responsiveness, reliability, and seamless user experience.

iOS/Android Engineer

HitPay

Dec 2019 - Jul 2022 (2 years 8 months)

Senior Mobile Engineer

HitPay

May 2019 - Jul 2022 (3 years 3 months)

• Developed and maintained native iOS and Android applications for HitPay's payment pro- cessing platform serving small and medium-sized businesses across Southeast Asia • Delivered new payment features and UX improvements that increased 30-day user retention by 20% (from 65% to 78%), directly contributing to business growth and customer satisfaction • Integrated Stripe and regional payment gateways (PayNow, GrabPay, Alipay) using secure na- tive modules with PCI DSS compliance standards • Built automated testing suite (JUnit, XCTest, UI tests) that reduced regression testing time by 40% (from ~5 hours to ~3 hours per release cycle) and increased release velocity • Refactored legacy codebase to modern architecture patterns (MVVM, Clean Arch

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Mobile Developer

DPD Deutschland

Jan 2019 - May 2020 (1 year 5 months)

Improved the DPD mobile platform, enhancing the app's functionality and user experience. Increased app stability by 35% through targeted bug fixes and code optimization. Boosted user satisfaction by 25% as reflected in app store ratings post bugfix deployment. Enhanced feature set leading to a 15% rise in monthly active users.

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Mobile Engineer Contractor

Apps That Pay LLC

Sep 2018 - Apr 2019 (8 months)

• Developed native iOS survey rewards application for Zap Surveys, a market research platform with 3.1M+ downloads that has distributed over $51 million in cash rewards to users globally • Integrated four simultaneous third-party survey provider SDKs (PeanutLabs, TheoremReach, TapResearch, InBrain) increasing survey availability per user session by 60% and maximizing daily earning potential • Implemented RxSwift and RxCocoa reactive data pipeline with RxAlamofire networking for real-time survey matching, reducing average survey load time by 32% and improving user-to-survey fit accuracy through demographic profiling • Built AppsFlyer and Branch attribution system tracking user acquisition across paid and organic channels, providing marketing

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Android Engineer Contractor

StrangeLogic Ltd

Feb 2018 - Aug 2018 (7 months)

• Engineered Android SDK for Proxyrack's peer-node monetization infrastructure, enabling third-party app publishers to generate passive revenue by contributing users' idle device bandwidth to a residential proxy network • Reduced SDK integration time from several days to under 30 minutes by designing a modular, self-contained architecture using EventBus for internal communication and PermissionsDispatcher for transparent runtime permission handling • Implemented jmDNS-based network service discovery layer enabling reliable peer node detection and routing across diverse mobile network environments, achieving 99.2% connection success rate in QA testing • Built RxJava2 and RxAndroid real-time bandwidth monitoring pipeline tracking active and i

Cross Platform App Developer

Arcadia

Apr 2017 - Dec 2018 (1 year 9 months)

Developed the TurfWalker mobile application for Arcadia Power Inc, enhancing door-to-door community solar sales in the US. Increased sales rep accountability by implementing precise location tracking, resulting in a 40% improvement in conduct compliance. Boosted operational efficiency through the seamless integration of Rep ID storage and retrieval within the app.

Mobile Software Engineer

ATT

Sep 2016 - Dec 2019 (3 years 4 months)

Improved the efficiency of AT&T's internal device testing process by enhancing the TACS Android application. Enhanced the overall testing productivity by streamlining app-device workflows, resulting in a 35% reduction in testing cycle time.

Mobile & Web Developer

Real

Apr 2016 - Mar 2017 (1 year)

Enhanced the Real Agent platform, a comprehensive tool for real estate professionals to manage documents and track transactions. Elevated transaction tracking accuracy, resulting in a more reliable platform for real estate agents.

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Software Engineer, Mobile

Real Agency Brokerage

Mar 2015 - Jan 2018 (2 years 11 months)

• Developed cross-platform iOS and Android application for Real reZEN (formerly Real Agent), a transaction management and business intelligence platform serving 33,000+ licensed real estate agents across the US and Canada • Built MLS-connected property search and listing features using Google Maps API and React Navigation, enabling agents to discover, filter, and share active listings directly from the mobile app • Implemented document management and e-signature workflows with React Native and Redux that reduced average transaction paperwork completion time by 35%, streamlining deal closing for agents across 50 US states • Integrated Firebase Cloud Messaging for real-time push notifications on transaction status updates, commission mileston

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Mobile Application Developer

BlazePod

Mar 2015 - Mar 2016 (1 year 1 month)

Enhanced the BlazePod app, orchestrating workouts using innovative fitness pods. Integrated advanced BLE technology for real-time interaction between the app and fitness pods. Improved user retention by adding personalized workout tracking and progress analytics. The project received positive media coverage for innovation in fitness technology.

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Mobile Developer Contractor

BlazePod

Sep 2014 - Feb 2015 (6 months)

• Improved companion mobile application for BlazePod, a Bluetooth-connected reaction light training system used by 300,000+ athletes and elite organizations including Arsenal, FC Bayern München, and the UFC Performance Institute • Engineered Bluetooth Low Energy communication layer enabling sub-100ms pod response latency, delivering real-time LED activation sequences across multi-pod training configurations • Built customizable drill creation system allowing coaches to configure pod sequences, flash timing, and difficulty progressions, supporting 500+ pre-built sport-specific workout templates • Implemented real-time reaction time measurement and analytics engine capturing millisecond-precision tap response data and rendering session perfor

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Android Engineer

SaferVPN

Mar 2014 - Feb 2015 (1 year)

Contributed to full-cycle Android development of a VPN application, working with both SDK and NDK components for optimal performance and security. Improved app stability and efficiency by optimizing native code and implementing best practices in Java.

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