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AlexanderGoncharov

Senior full-stack and mobile engineer, technical lead. Montréal, working remotely.

For 13 years I've built production software end to end: data models, APIs, cloud infrastructure, and the web and mobile apps people actually hold. By day I lead engineering on a regulated medical software platform with AI scoring in production. The rest of the time I build my own products, led by Marketing OS, an AI marketing autopilot that has published over 1,000 posts for my apps.

Email me LinkedIn GitHub

Products

Independent work, built solo from idea to production: product design, front end, back end, AI pipelines, analytics and release automation.

Marketing OS

Running daily for my studio's apps

A marketing autopilot for apps and games. Point it at a store listing and it researches post ideas, writes them, makes short videos, publishes on a schedule and reports what worked.

I built it to market my own studio's apps, and it now runs that marketing end to end. It turns real app footage, store assets, AI pictures and an animated presenter into vertical videos, then posts them to TikTok, Instagram, Facebook, YouTube, X and Pinterest. Analytics feed the next round of ideas.

Results: daily views climbing from near zero to about 9k a day over 30 days.
Views in 30 days
147k104× the 30 days before
Posts published
1,000+6 platforms since 2026-09-14
Videos rendered
900+best post 7.1k views
  • Agent pipeline from research to strategy, copy, creative, approval, scheduling, publishing, comments and analytics. Low-risk posts go out on their own; high-risk ones wait for approval.
  • Video engine on ffmpeg: a shot planner, footage highlights, AI images and clips, text-to-speech voiceover, an animated presenter and loudness-normalised mixes.
  • Growth analytics per brand and platform, Google Play install reports matched to tagged links, app store keyword tracking, and A/B versions of the same post.
  • SaaS foundations: multi-tenant workspaces, roles and invites, credit-based plans, onboarding, a Telegram bot and a remote Mac render worker.
  • React 19
  • TypeScript
  • Vite
  • MUI
  • Recharts
  • Node.js
  • Express
  • Prisma
  • Gemini API
  • Claude API
  • ffmpeg

About 75,000 lines of TypeScript, 200 API routes and 38 data models.

  • Videos and posts
  • Home dashboard
  • Top posts
  • Calendar
  • Idea research

Watchland

On Google Play

A community gallery of Galaxy Watch faces for phones and Wear OS watches.

Watchland was my first big app: the original reached more than 100,000 downloads. Today it is a whole platform, and more than 541,000 watch faces have been installed through it.

  • A React Native phone app plus a native Kotlin Wear OS app, so people browse on the phone and install on the watch.
  • A web creator portal on Firebase where designers sign up, submit their watch faces and see their stats once approved.
  • An in-house build pipeline that packages submitted designs into signed Wear OS apps, plus AdMob mediation across five ad networks.
  • React Native
  • Expo
  • Kotlin
  • Wear OS
  • Firebase
  • Cloud Functions
  • React
  • AdMob
Get it on Google Playwatchland.ca

RateWatch

On Google Play

Canadian mortgage rates from banks, credit unions and online lenders, with alerts when they drop.

  • A Python back end on Firebase Cloud Functions collects rates every day for eight provinces and keeps the history.
  • Smart alerts in plain English: people type a goal such as "tell me when 5-year fixed is under 4.5%" and Gemini turns it into a rule.
  • A renewal tracker with reminders 180, 120, 30 and 7 days out, plain-language calculators and a glossary.
  • Localised into several languages, including on-device number and currency formatting and translated push notifications.
  • React Native
  • Expo
  • TypeScript
  • Python
  • Firebase
  • Gemini API
Get it on Google PlayWebsite

Jio Music

On Google Play

A calm music player for your own files and online catalogues.

  • Rebuilt from Flutter to React Native on the New Architecture, with a custom native module that reads the Android media library.
  • Album-art colour theming, vinyl and cassette visualisers, mood reactions and smart playlists.
  • A Premium tier with an AI assistant and a streaming relay, and a Jest test suite for the API providers and player engine.
  • React Native
  • Expo SDK 54
  • TypeScript
  • Kotlin native module
  • Track Player
  • Node.js relay
  • Jest
Get it on Google PlayWebsite

More apps

Arcana In Google Play review

Tarot on a candle-lit 3D table plus I Ching, astrology and palmistry. AI readings run through a Cloudflare Worker in front of Gemini, and subscriptions are verified directly with the stores.

Website

Qiuqian On Google Play

Shake your phone and 64 bamboo fortune sticks rattle with real physics until one falls out. Bilingual English and Chinese.

Google PlayWebsite

Meme Soundboard On Google Play

Build and share soundboards on your phone, then play them from your wrist with a native Wear OS companion.

Google Play

Open Shelf Coming soon

A calm ebook reader for EPUB, PDF, MOBI, FB2 and DjVu, with an on-device crawler that finds free public-domain classics.

Website

Kitchen Up On Google Play

A recipe app with AI features. More than 5,000 downloads.

Google Play

Bailong Console Internal tool

The release platform behind every app here: builds, uploads, promotes and submits to the App Store, Google Play and Aptoide, with dry-run plans and live job logs.

Games

Folkplay In testing

160+ folk and schoolyard games in one offline app, with my own 3D renderer on React Native Skia and bot opponents.

Website

Rope Ninja On Google Play

A grappling-rope tower climber in TypeScript and Capacitor. Its physics run headless in Node so bots can soak-test every tuning change.

Google Play

Loo Lord On Google Play

An 8-bit restroom management game in Phaser 3, in 16 languages, with pixel art generated from code.

Google Play

Experience

Lead engineer roles across healthcare, mapping, marketing analytics and wearables.

  1. Technical Lead, MoCA Cognition

    to present. Remote

    Cross-platform Software as a Medical Device (SaMD) for self-administered digital cognitive assessment on iPad, Android and web, with AI scoring of speech and drawings, used in clinical studies in Canada and the US.

    • End-to-end ownership: lead engineer for the architecture, data model, REST APIs and React Native and web clients, working with product, clinical science, QA and regulatory teams.
    • Multi-region data residency: designed study routing through a GraphQL registry on Azure so each study's data is created and served only in its home region.
    • ML in production: own the integration with the AI scoring pipeline (speech-to-text on GPU, LLM scoring on Amazon Bedrock); added versioned rescoring, and server-side audio normalisation that fixed AI calls on Android and web, which had a 0% success rate.
    • Cost and performance: measured AI infrastructure spend, then scheduled scaling that roughly halved the run rate; removed about 30 s from session start.
    • Security and compliance: led penetration-test remediation, structured logging with automatic redaction, and IEC 62304 / ISO 13485 change control with requirement-to-test traceability in Ketryx.
    • Leadership: assign and guide the team's work, review every pull request and run second-round technical interviews.

  2. Senior Software Engineer, Mapgears

    to . Remote

    Real-time mapping and fleet tracking for sports, waste removal and snow removal.

    • Technical lead for the mobile product line on Android, iOS and Kotlin Multiplatform, sharing business logic across platforms.
    • Delivered features from Flask and Firebase APIs through to UI, with multithreading and memory work for continuous real-time tracking.

  3. Senior Mobile Engineer, Tongdao

    to . Shanghai, China

    Marketing-analytics SDKs that collect user events for intelligent campaigns.

    • Managed the mobile team building the Android, iOS, JavaScript and WeChat SDKs; made the SDK three times smaller.
    • Built GitLab CI pipelines with unit tests, GCP integration tests, Docker sandboxes and automatic CDN deployment.

  4. Full-Stack Engineer, Daragon Technology

    to . Montréal, QC

    • Built a platform for sharing large watch-face files worldwide from scratch: Django and PostgreSQL backend, REST APIs, Android, iOS and wearable apps.

  5. Mobile Engineer, QuickMobile

    to . Vancouver, BC

    • Custom Android components and SQL tuning for event apps used by Fortune 500 companies.

Skills

Mobile
React Native, Expo, Android (Kotlin, Java, Jetpack Compose), iOS (Swift, SwiftUI, Objective-C), Kotlin Multiplatform, Flutter, Capacitor, Wear OS, watchOS
Backend and APIs
C#, .NET 8, ASP.NET Core, Entity Framework Core, Python (FastAPI, Django, Flask), Node.js, REST, GraphQL
Front end
React, TypeScript, JavaScript, HTML and CSS, accessible and responsive UI
Cloud and DevOps
AWS (ECS Fargate, Lambda, API Gateway, RDS, S3, CloudFront, Bedrock, Secrets Manager), Azure, Terraform, Docker, Firebase, Supabase, Cloudflare Workers, Bitbucket Pipelines, GitHub Actions, GitLab CI, Datadog
AI and ML in production
Speech-to-text (Whisper, Parakeet) on GPU, LLM scoring on Amazon Bedrock, Gemini API, on-device speech recognition, model cost analysis
Data
SQL Server, PostgreSQL, MySQL, DynamoDB, BigQuery, data modelling and migrations, audit trails
Security and regulated delivery
HIPAA, GDPR, RBAC, OIDC, SAML, JWT, penetration-test remediation, IEC 62304, ISO 13485, SOUP management, Ketryx, Jira
Games and graphics
Phaser, three.js, React Three Fiber, Skia, Canvas, shaders, procedural art, game AI and balance testing

B.Sc., Biochemistry, McGill University to

Certified ScrumMaster (CSM)Scrum Alliance

LanguagesEnglish, French, Mandarin, Spanish, Hebrew, Russian

Let's build the next one together

I'm open to senior and lead roles in full-stack, mobile and AI product engineering, remote or in Montréal.

alexandergoncharov88@gmail.com LinkedIn GitHub