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The 4-Day Sprint: How I Navigated a High-Stakes KMP Refactor
My native Android app was live and stable, when a key stakeholder arrived with a familiar request: they needed iOS support, and they needed it fast.
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MUHAMMAD TANTOWI JAUHARI
BUILDING
MOBILE & SYSTEM
PRODUCTS.
Software Engineer crafting high-performance Kotlin Multiplatform apps, Go backends, and automated digital platforms.
MOBILE & FULL-STACK ENGINEER BANJARMASIN / INDONESIA
FEATURED CASE STUDIES
Project Highlights
Active Production (2026) PRODUCTION
NEBU | Digital Top-Up Platform
Independent digital top-up platform engineered with Go and Svelte for automated transaction processing and sub-second payment webhooks.
Product Engineer / Full-stack Developer
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Flagship Enterprise (2025 - 2026) PRODUCTION
EDUNUSA Suite | Educational Ecosystem & CBT Engine
Unified cross-platform mobile suite sharing 85%+ Kotlin code across iOS and Android with hardware secure enclave anti-cheat lockdown.
Lead Mobile Architect
Explore Details →
02 // CAREER PIPELINE
Professional Journey
Engineered career progression across high-growth startups, mobile ecosystems, and Google accelerator cohorts.
ACTIVE ROLE Mar 2026 - Present
Mobile Developer
Freelance • Remote
Spearheading mobile architecture evolution and cross-platform component maintenance for PT Instrumeta Teknologi Nusantara.
Key Impact Milestones:
KMP Migration iOS Parity +35% Speed Codemagic CI/CD
Migrated core UI components to Compose Multiplatform for iOS parity.
Optimized memory footprint and startup performance by 35%.
Automated CI/CD distribution pipelines using Codemagic and TestFlight.
COMPLETED Nov 2025 - Feb 2026
Mobile Developer (Contract)
PT Instrumeta Teknologi Nusantara • Banjarbaru, South Kalimantan
Architected production-grade Android and cross-platform applications focused on educational ecosystems.
Key Impact Milestones:
Clean Architecture EDUNUSA CBT Multi-Module API Integration
Built EDUNUSA and EDUNUSA CBT from ground up.
Implemented Clean Architecture and modular multi-module project structures.
Integrated complex RESTful APIs for real-time exam execution and robust data flow.
GRADUATE Feb 2024 - Jul 2024
Mobile Development Cohort
Bangkit Academy 2024 • Remote (Google, GoTo, Traveloka)
Graduated from Google's intensive Android developer accelerator program under MSIB Kampus Merdeka.
Key Impact Milestones:
Android Architecture Android XML
Mastered advanced Android architecture, Jetpack libraries, and testing.
Led mobile engineering for 'Moove' capstone project.
03 // CAPABILITIES MATRIX
Technical Stack
Comprehensive technical proficiencies, production languages, microservice frameworks, and DevOps tooling.
Mobile Engineering
Cross-platform & Native Android Solutions
Kotlin
Primary Lang
Jetpack Compose
UI Engine
Compose Multiplatform
iOS & Android
Kotlin Multiplatform (KMP)
Shared Logic
Android Native
SDK & NDK
Swift / iOS
Platform Integration
Backend & Systems
High-concurrency Microservices & Storage
Go (Golang)
High Perf API
Java (Spring Boot)
Enterprise
Ktor Engine
Kotlin HTTP
PostgreSQL & MySQL
Relational DB
Redis
Async Queue & Cache
RESTful APIs
Integrations
DevOps & Tooling
Deployment, Monitoring & Web Stack
Docker & VPS
Containers
Nginx & Cloudflare
Reverse Proxy
Grafana, Loki, Promtail
Telemetry
Svelte
Frontend UI
Tailwind CSS
Styling
Git & Postman
Workflow
