Eliachar Feig | Senior Software Engineer

My Background

Bridging Engineering, Product, and Applied AI.

I am a Senior Mobile Engineer with a strong product mindset, specialized in building scalable applications that bridge the gap between user experience and complex backends.

With 3+ years of experience in enterprise iOS & Flutter environments, I’ve expanded into full-stack ownership designing APIs and delivering features end-to-end. Recently, I’ve been focused on Applied AI, shipping production-ready LLM integrations that provide real-world value.

Current Focus: Deepening LLM Engineering to build systems where product, engineering, and AI intersect.

Download Full CV

Experience

Experience in Industry.

Building production-grade mobile products for enterprise clients where quality, security, performance, and maintainability are non-negotiable.

Operating in high-scale, regulated environments that demand long-term ownership and reliability.

Focus: Product-driven engineering, scalable architecture, end-to-end delivery, and stability across releases.

Core strengths

iOS (Swift / UIKit / SwiftUI)Flutter / DartProduct-driven EngineeringArchitecture & StatePerformance & StabilitySecurity & Reliability

Senior Mobile & Product Engineer

Balink LTD•2022 – Present

Enterprise Mobile

Shipped and maintained enterprise-scale mobile apps for global luxury brands such Cartier, Chanel and Macys's.

Designed complex user flows and scalable state management.

Owned features end-to-end, collaborating across product, backend, and design.

Improved performance, stability, and security across multiple production releases.

Portfolio

Recent Projects

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AI & Flutter

InnerOrbit

InnerOrbit is a full-stack, AI-powered mobile app designed to provide personalized self-development insights through intelligent data analysis.

Google Play

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Full Stack & LLMs

Multi-LLM Chat Platform

A production-style, multi-provider AI chat app with per-user authentication, isolated chat history, streaming responses, and PostgreSQL persistence — built with a Next.js frontend and a Dockerized FastAPI backend.

Live Demo Github

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Unity & C#

Assemble Z' Army

Real-time multiplayer RTS with synchronized state.

Github

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Full Stack

Spring Book Store

Secure e-commerce backend with auth + transactions.

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C++ & SFML

Sonic Remake

OOP game architecture with performance focus.

Github

Play Video

IoT & Python

HousEye

Raspberry Pi security with OpenCV + Firebase.

Github

Computer Vision

Mobileye TFL

Traffic light detection + distance estimation.

Github

Algorithms & Python

Google Autocomplete

Error-tolerant autocomplete under strict constraints.

Github

Expertise

Technical Stack

Mobile Architecture

Expertise in iOS (Swift/SwiftUI/UIKit) and cross-platform Flutter/Dart. Focus on modular, testable code and high-performance UI.

SwiftSwiftUIFlutterDart

Full-Stack & AI

Developing LLM-based features and personalized AI insights. Designing APIs and backend logic with Node.js and Spring Boot.

LLM IntegrationPrompt Eng.Node.jsPython

Product & System Ownership

Owning features end-to-end — from product thinking and architecture decisions to production delivery.

System DesignAPI DesignEnd-to-End Delivery

Track Record

Impact in Numbers

0+

Software Engineering

0k+

Active App Users

0%

Project Ownership

How I Work

From clarity to production.

A lightweight, product-driven workflow that keeps quality high and cycles fast.

Discover

Understand the user, scope, constraints, and success metrics.

Design

Architecture + UX decisions that scale and stay maintainable.

Build

Ship incrementally with strong state management and clean boundaries.

Ship

Performance, stability, and release readiness - no surprises.

Working principles

Architecture-firstPerformance-awareOwnership mindsetUser-centricProduction discipline

Let’s talk

Continuous Growth

What I'm Learning Now

Deepening my expertise in the frontier of Artificial Intelligence.

LLM & RAG

Building robust retrieval systems to ground LLMs in private data.

Vector DBsLangChain

Fine-tuning & LoRA

Optimizing performance using PEFT and Low-Rank Adaptation.

PyTorchHuggingFace

AI Agents

Designing autonomous systems capable of planning and tool-use.

AutoGPTFunction Calling

Deep Learning

Mastering neural architectures and attention mechanisms.

PyTorchTransformersNeural Nets

Generative AI

Exploring diffusion models and transformer architectures.

DiffusionGANsMulti-modal

Contact

Let's build something extraordinary.

Whether it's a senior role, an AI-driven project, or just a technical deep-dive, my inbox is always open.

eliacharfeig@gmail.com

linkedin.com/in/eliachar-feig