Mobile systems engineer

Available for selective engineering work

I build mobile systems that keep working when conditions stop being ideal.

Senior mobile engineer focused on Flutter architecture, performance, and product delivery—from constrained Android hardware to high-volume transaction flows.

Inspect the workDownload résumé

01 / CASE LOG

Evidence, not decoration.

Selected systems, the pressure they were under, and the engineering decisions behind them.

01

Mobile creation

Intro Tools ML PRO

Scaled beyond 1M downloads while keeping the core editing workflow responsive.

Open engineering record
Problem
A content-creation workflow had to remain usable on low-memory Android devices.
Ownership
Owned Flutter architecture, performance profiling, memory control, and native ML integration.
Constraint
Constrained hardware, media-heavy timelines, and on-device inference.

Public product · links withheld

Flutter · Dart · ML Kit · Dart FFI

02

Fintech operations

InKanteen

Reduced crash rate by 95% and strengthened release confidence with automated smoke checks.

Open engineering record
Problem
Ordering and payment flows needed consistent operation across 300+ locations.
Ownership
Led mobile architecture across ordering, payment, and kitchen-display workflows.
Constraint
Thousands of daily transactions and varied on-site device conditions.

Client work · confidential

Flutter · Firebase · Go · Payments

03

Web3 + AI

Myusic AI

Delivered a single cross-platform interface spanning generation through minting.

Open engineering record
Problem
Wallet connection, AI generation, and NFT minting had to feel like one coherent mobile flow.
Ownership
Integrated multi-chain wallet access, contract interactions, and generation UX.
Constraint
Multiple asynchronous systems with unfamiliar Web3 failure states.

Product build · links withheld

Flutter · Reown · Ethers.js · Solidity

04

Healthcare management

Audy Dental CMS

Saved 40 hours/week in administrative overhead while maintaining 99% appointment accuracy.

Open engineering record
Problem
Patient scheduling and clinic administration needed unified web management.
Ownership
Built healthcare management web interfaces and backend scheduling integration.
Constraint
High scheduling precision and administrative workflow efficiency.

Client work · operational

Next.js · Laravel · TypeScript · REST API

05

Edge intelligence

Smart Access

Enabled local recognition workflows without a cloud round-trip.

Open engineering record
Problem
Security checks needed face and plate recognition without reliable connectivity.
Ownership
Connected the Flutter client, Go API, and edge inference pipeline.
Constraint
Offline operation on embedded Android hardware.

Client work · confidential

Flutter · Go · YOLO · Dlib

02 / OPERATING RANGE

Architecture through release.

Capability is useful only when it changes an outcome.

A / Mobile foundations

Systems that survive scale.

Clean boundaries, predictable state, offline-first flows, native integrations, and codebases teams can extend.

Flutter · Dart · Swift · Kotlin · React Native · Expo

B / Web & Frontend

Type-safe, reactive user interfaces.

Modern web architecture with routing, state management, and responsive component design.

Next.js · React · TypeScript · Tailwind CSS

C / Backend Systems

Scalable API & microservices.

Modular backend architecture designed for heavy load, maintainability, and clean domain isolation.

Node.js · Go · Python (FastAPI) · REST · GraphQL

D / Database & Security

Robust data modeling & secure access.

Relational schema design, type-safe queries, role-based security policies, and encrypted storage.

Supabase (PostgreSQL & RLS) · Firebase · AES-GCM

E / Performance

Measured, then improved.

Frame timing, memory pressure, startup cost, network behavior, and low-end device constraints treated as product requirements.

Profiling · Rendering · FFI · Edge ML

F / Delivery

Release is part of engineering.

CI/CD, smoke checks, observability, and pragmatic architecture that moves work from commit to users safely.

CI/CD · Firebase · AWS · Docker

03 / SERVICE HISTORY

Progressive responsibility.

Roles overlap where consulting and product commitments ran in parallel.

  1. Senior Mobile Engineer

    Rolling Glory

    Architecting enterprise mobile products, improving rendering performance, and shortening release cycles through CI/CD.

  2. Senior Mobile Developer

    Nearay GmbH

    Led GDPR implementation and adapted core product flows for European users.

  3. Lead Mobile Engineer

    InKanteen

    Engineered ordering and fintech systems operating across hundreds of locations.

  4. Mobile Engineering Intern

    WorkLifeAndBeyond

    Built HR modules and improved legacy performance on low-powered field devices.

04 / FIELD NOTES

Thinking made inspectable.

Notes on AI tooling, systems, and shipping prototypes into production.

AI engineering

GPT-5.6 Sol vs Claude Fable 5: Which AI Model Should Engineers Actually Use

AI engineering

Claude 4.5 vs Gemini 3 Pro: Why Smart Developers Use Both

System architecture

From AI Prototype to Production: A Gesture-Controlled 3D System

Product engineering

Building an AI Learning Platform in Two Days

Creative Coding

How to Build Aesthetic Terminal Videos with Python

Read all field notes on Medium ↗

05 / VERIFIED SIGNALS

Outcomes over applause.

Anonymized project outcomes are used where public attribution is unavailable.

“Reduced our app crash rate by 95% while supporting thousands of daily transactions across 300+ locations.”
Project outcome · InKanteen
“Delivered GDPR work early and redesigned core flows for a new market.”
Project outcome · Nearay
“Saved 40 hours/week in administrative overhead while maintaining 99% appointment scheduling accuracy.”
Project outcome · Audy Dental CMS

06 / OPEN CHANNEL

Need an engineer who can own the difficult middle?

Share the product, constraint, and outcome you need. I’ll reply with the clearest useful next step.

Email VarrielMessage on WhatsApp ↗
muhvarriel@gmail.com