Lefrand Bima Dzaki

Building reliable, scalable, and intuitive mobile experiences.

Hi, I’m Lefrand Bima Dzaki. I build production mobile applications with Flutter and Dart, focusing on clean architecture, RESTful API integration, and real-world e-commerce & B2B business workflows.

Flutter & DartAndroid & iOSB2B & E-commerce FlowsRESTful APIs & State Management
View ProjectsContact Me
// About Me

Engineering mobile solutions with precision and purpose

I am a Mobile Developer & Software Engineer with a focused dedication to building cross-platform mobile applications for Android and iOS using Flutter (Dart).

Currently at PT Oka Iki Indonesia, I architect and build enterprise-grade mobile products for the SSBO B2B marketplace ecosystem. My work spans high-stakes buyer and merchant workflows, including multi-vendor checkout, Request for Quotation (RFQ) price negotiations, in-app chat, order dispatch, and complex refund & replacement state machines.

Beyond mobile client interfaces, I hold an end-to-end perspective on software systems—integrating secure RESTful APIs, managing serverless architectures, and delivering real-time streaming experiences. I prioritize clean code principles, reactive state management, and continuous performance tuning to deliver mobile apps that stay fast, maintainable, and delightful for end users.

Quick Facts
Primary RoleMobile Developer
Primary StackFlutter / Dart
PlatformsAndroid • iOS
LocationTangerang, Banten
// Experience

Professional Journey & Engineering Track Record

Direct engineering contributions across production mobile systems, independent technical programs, and community IoT initiatives.

Mobile Developer

Current Role
Nov 2025 – Present
PT Oka Iki Indonesia

Designed, built from the ground up, and optimized cross-platform mobile applications (Android & iOS) for a B2B marketplace ecosystem through the SSBO B2B and SSBO B2B Seller products using Flutter (Dart).

  • Designed, built from the ground up, and optimized cross-platform mobile applications (Android & iOS) for a B2B marketplace ecosystem through the SSBO B2B and SSBO B2B Seller products using Flutter (Dart).
  • Connected the application to backend services through RESTful API integration to ensure real-time and secure synchronization of transaction data, product management, and application performance.
  • Implemented clean code and efficient state management to handle complex e-commerce workflows (buyer & merchant sides).
  • Actively collaborated within a cross-functional team (Product, Design, & Backend) to translate business requirements into solutive application features focused on user convenience.
FlutterDartAndroidiOSRESTful APIState ManagementClean Architecture

Blockchain Engineer

Certified Independent Study
Aug 2022 – Dec 2023
Greatedu Global Mahardika

Designed and developed smart contracts and integrated them with frontend applications for a blockchain-based waste tracking system.

  • Designed and developed smart contracts using Solidity and integrated them with the front-end.
  • Built a Web3-based application leveraging Blockchain technology for a waste management and tracking system.
  • Received the Best Blockchain Final Project award for successfully implementing the developed technology solution.
SoliditySmart ContractsReactWeb3WagmiRainbowKit

Junior Programmer

Volunteer
Nov 2022 – Jan 2023
Yayasan Hidup Berdikari Sejahtera

Collaborated within an engineering team to develop an assistive IoT Smart Chess Clock for athletes with disabilities.

  • Collaborated within a team to design the concept, architecture, and system flow of an IoT Smart Chess Clock for athletes with disabilities.
  • Actively participated in microcontroller programming and IoT component integration to ensure features functioned properly.
  • Conducted testing and system adjustments to ensure ease of use for the target users.
IoTMicrocontroller ProgrammingHardware IntegrationSystem Testing
// Projects

Featured Works & Engineering Projects

Real-world production applications, self-directed AI platforms, and technical research systems.

SSBO B2B Marketplace preview
Production App
PT Oka Iki Indonesia
B2B E-commerce • Mobile

SSBO B2B Marketplace

Cross-platform B2B marketplace mobile application built with Flutter connecting enterprise buyers with wholesale merchants and suppliers.

Key Contributions
  • Engineered core e-commerce architecture: catalog browsing, cart, multi-vendor checkout, orders, digital payment, vouchers, and in-app chat.
  • Implemented RFQ (Request for Quotation) enabling real-time price negotiations between corporate buyers and sellers.
  • Developed end-to-end post-purchase transaction workflows including shipping tracking, dispute resolution, refund, return, and replacement flows.
  • Integrated RESTful APIs with clean state management and repository pattern for scalable, maintainable mobile code.
Google PlayApp Store
FlutterDartAndroidiOSREST APIState ManagementClean Architecture
SSBO B2B Seller Merchant preview
Production App
PT Oka Iki Indonesia
Merchant Operations • Mobile

SSBO B2B Seller Merchant

Dedicated merchant mobile application empowering B2B suppliers to manage store inventory, incoming wholesale orders, price negotiations, and daily operations.

Key Contributions
  • Developed comprehensive store management: product catalog, stock synchronization, flash sales, discount bundles, and shipping options.
  • Built merchant analytics dashboard, operational notification center, and real-time customer messaging.
  • Integrated financial & balance withdrawal modules with automated transaction settlement and status tracking.
  • Optimized app rendering performance, caching, and state synchronization for heavy data loads.
FlutterDartAndroidiOSREST APIState ManagementFinancial Flows
Naranta preview
Self Project
Self Project
Self Project • AI Platform

Naranta

Responsive AI chatbot application and LLM orchestration platform built with real-time streaming, serverless backend, and session persistence.

Key Contributions
  • Built a high-performance responsive web interface using Next.js paired with a Hono serverless API on Deno.
  • Developed an API orchestration layer using LangChain to route and coordinate LLM inference models.
  • Implemented Server-Sent Events (SSE) for low-latency token streaming and responsive assistant interactions.
  • Managed user authentication, session security, and conversation history persistence via Supabase (PostgreSQL).
  • Integrated agentic search workflows and structured prompt context management.
Visit Website
Next.jsTypeScriptHonoDenoLangChainSupabasePostgreSQLSSE
WMT Project (Waste Tracking) preview
Best Final Project
Greatedu Global Mahardika
Web3 • Supply Chain

WMT Project (Waste Tracking)

Blockchain-based decentralized supply chain platform ensuring transparent, tamper-proof tracking of waste journeys from origin to recycling facilities.

Key Contributions
  • Designed and deployed smart contracts using Solidity for immutable on-chain record keeping.
  • Integrated contracts with a modern React frontend using Wagmi and RainbowKit wallet connectors.
  • Architected full lifecycle tracking from pickup and transport logistics to verified recycling centers.
  • Awarded the Best Blockchain Final Project for technical execution and sustainability impact.
Visit DApp
SoliditySmart ContractsReactWeb3WagmiRainbowKit
Embedded HardwareIoT Smart Chess Clock
Volunteer Project
Yayasan Hidup Berdikari Sejahtera
Assistive IoT • Embedded

IoT Smart Chess Clock

Assistive smart chess clock hardware system designed to empower athletes with disabilities to compete seamlessly in tournament settings.

Key Contributions
  • Collaborated on system architecture, interaction flows, and tactile feedback mechanisms.
  • Programmed microcontrollers and integrated sensory components for precise timing and accessibility.
  • Conducted usability testing and hardware calibration with target athletes to ensure reliable operation.
IoTMicrocontrollersC/C++Hardware IntegrationAccessibility
// Skills & Stack

Technical Competencies & Domain Expertise

Technologies, architectural patterns, and specialized domains utilized across production and research environments.

Mobile Development

Core expertise in cross-platform mobile engineering for Android & iOS.

FlutterDartAndroidiOSCross-Platform ArchitectureMobile UI/UX Implementation

Software Engineering & Architecture

Architecting reliable, scalable application layers and client-server communication.

RESTful API IntegrationState ManagementClean ArchitectureAuthentication & SecurityPush NotificationsServer-Sent Events (SSE)Git & Version ControlPerformance Optimization

Web & Frontend

Building responsive and accessible web applications and component systems.

Next.jsTypeScriptReactTailwind CSSResponsive DesignDesign SystemsFigma

Backend, Cloud & AI

Serverless runtime environments, databases, and AI model orchestration.

SupabasePostgreSQLHonoDenoLangChain (LLM Orchestration)

Domain Capabilities

Specialized production domain patterns and business workflows.

B2B E-commerce & MarketplacesRFQ & Price NegotiationOrder & Refund WorkflowsMerchant & Operations ToolsFinancial & Wallet SettlementWeb3 & Smart Contracts (Solidity)IoT & Microcontrollers
// Get In Touch

Let's build something impactful together

I’m always open to discussing mobile engineering roles, Flutter projects, high-scale application architectures, and collaborative opportunities.

Email Me Directly
lefrandbima@gmail.com
0882-8916-6454
Tangerang, Banten
GitHub (lilbimz)