Software Developer

> Senior Full-Stack Engineer

Results-driven Senior Full-Stack Engineer with 5+ years of experience specializing in advanced Mathematical Logic, web/mobile application development, and technical leadership. Expert in React, React Native, JavaScript, TypeScript, Node.js, Python, Java, and AWS, with a proven track record of leading multi-quarter digital transformations and architecting systems for 200+ enterprise clients. Currently serving as an Architectural Design Lead at The Age of Light Inc., spearheading the end-to-end frontend and mobile architecture for an AI-driven, cross-platform ecosystem. Recently spearheaded a complete UI overhaul at MDF Commerce that increased platform efficiency by 80%. Previously at The Minery, led the full-stack architecture for a nationwide employee tracking application adopted by all Honda and Acura dealerships in Canada, specifically defining core RESTful API schemas and building the frontend. Passionate about reducing operational overhead through intelligent automation and delivering scalable, WCAG-compliant solutions in fast-paced Agile environments.

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System Architecture

Core Competencies & Engineering Disciplines

Bridging mathematical logic, ultra-responsive frontends, and mission-critical cloud infrastructure.

Real-Time AI & Streaming

Engineering ultra-low-latency 60fps audio/video streaming via LiveKit WebRTC, HeyGen avatars, Google Gemini LLMs, Qdrant semantic vector search, and agentic guardrails.

LiveKit WebRTC HeyGen Avatars Gemini LLMs Qdrant Vector DB Agentic Guardrails

Cloud & Serverless Infrastructure

Architecting resilient AWS serverless backends with AWS CDK (Infrastructure as Code), Lambda microservices, API Gateway, DynamoDB single-table designs, SQS, and Cognito.

AWS CDK AWS Lambda DynamoDB Amazon SQS Cognito & JWT S3 & CloudFront

Frontend & Mobile Ecosystem

Crafting accessible, state-of-the-art web and native applications with React, React Native, TypeScript, and Redux. WCAG 2.1 compliance and multi-language i18n support.

React.js React Native TypeScript Redux Toolkit WCAG 2.1 AA i18n (13 Languages)

Enterprise Backend & Integrations

Building secure REST & GraphQL microservices, enterprise e-signatures (OneSpan & DocuSign), RevenueCat and Stripe payment processing, and Jenkins / GitHub Actions CI/CD.

Node.js & Express Python & Django Java & XML/XSLT Stripe & RevenueCat PostgreSQL & MongoDB GitHub Actions CI/CD

Complete Technical Toolkit

★ TypeScript

★ JavaScript (ES6+)

★ React.js

★ React Native

★ Redux / Toolkit

★ AWS CDK

★ AWS Lambda

★ Amazon DynamoDB

★ Amazon SQS / S3

★ Node.js / Express

★ Python / Django

★ Java & XML/XSLT

★ LiveKit WebRTC

★ Google Gemini LLMs

★ GraphQL & REST

★ PostgreSQL

★ MongoDB

★ Stripe API

★ RevenueCat

★ Docker

★ GitHub Actions

★ Jest & JUnit

★ WCAG 2.1 AA

Portfolio Showcase

Architected Solutions & Flagship Projects

Real-world production platforms handling enterprise scale, real-time streaming, and complex workflows.

AI & Real-Time 60fps Ultra-Low Latency

Real-Time AI Avatar Streaming & Voice Ecosystem

Architected the end-to-end frontend and mobile streaming system for an AI-driven, cross-platform ecosystem. Integrated LiveKit WebRTC and HeyGen avatars with Google Gemini LLMs and Qdrant semantic vector search for interactive conversations.

AWS CDK Serverless backend with DynamoDB, SQS & 13-language i18n support

React Native LiveKit WebRTC AWS CDK Gemini LLM Qdrant RevenueCat

Enterprise Cloud +80% Platform Efficiency

Enterprise Contract Lifecycle Management (CLM)

Spearheaded complete UI overhaul using React JS with WCAG 2.1 accessibility compliance. Designed dynamic form workflows with Java, XML, XSLT, and architected a Self-Service Contract Configuration Panel that eliminated 95% of manual developer interventions.

Automated complex approval chains via AWS Lambda & OneSpan / DocuSign E-Sign

React.js AWS Lambda Java XSLT OneSpan DocuSign

Enterprise Operations +25% Productivity Boost

Nationwide Dealership Employee Tracking System

Led full-stack architecture (Frontend & API) for a nationwide employee tracking application deployed to all Honda and Acura dealerships across Canada. Boosted dealership productivity by 25% and drove a 40% increase in mobile platform usage.

Secured sensitive enterprise payroll & performance data with Node.js & React

React.js Node.js Express Material UI REST API PostgreSQL

E-Commerce & Fintech PCI-Compliant Stripe

Multi-Vendor Merchant E-Commerce Platform

Built and scaled an online marketplace supporting independent vendors with dynamic pricing, catalog asset uploads, real-time inventory management, and zero-downtime payments.

Automated multi-merchant payouts & checkout flow with Stripe webhooks

Python Django React Stripe API PostgreSQL Docker

Mobile Engineering Real-Time Geolocation

Proximity-Based Restaurant Discovery App

Engineered a high-performance native iOS & Android application utilizing device GPS geolocation to rank and filter dining venues based on live proximity, verified reviews, and dietary tags.

Optimized native map rendering & background geolocation cache

React Native Geolocation API Node.js MongoDB Express

Algorithms & Data Dynamic Filtering

Dynamic Recommendation Engine

Designed a content-based recommendation platform using mathematical similarity ranking algorithms, advanced search filtering, and customized user preference graphs.

Sub-50ms query response times with optimized indexing

React.js Node.js REST API Mathematical Logic Tailwind

Track Record

Professional Experience & Engineering Leadership

A progressive trajectory of technical leadership, architectural design, and digital transformations.

Architectural Design Lead & Software Developer

The Age of Light Inc • Irvine, CA

Jan 2026 – Present

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Real-Time AI Streaming & UI: Engineered ultra-low-latency 60fps video/audio streaming using LiveKit WebRTC and HeyGen avatars via React Native, React JS, integrating Google Gemini LLMs, Qdrant semantic search, and agentic guardrails.

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Serverless Backend, Auth & APIs: Architected a secure serverless backend on AWS Lambda using Node.js, TypeScript, and AWS CDK, delivering scalable RESTful APIs via DynamoDB and SQS, backed by JWT authorization, AWS Cognito, and Google/Apple Sign-In.

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Localization & Global State: Implemented robust internationalization (i18n) supporting 13 different languages for global reach, while optimizing cross-platform global state using Redux.

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Monetization & Analytics: Integrated cross-platform monetization via RevenueCat and Stripe webhooks, alongside Firebase Analytics & Crashlytics, FCM push notifications, and Microsoft Clarity heatmaps.

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DevOps & Quality: Accelerated development using Claude Code and maintained 95%+ test coverage through automated GitHub Actions CI/CD pipelines and EAS OTA deployments.

React Native LiveKit WebRTC AWS CDK AWS Lambda DynamoDB Gemini LLMs Qdrant TypeScript Redux

Software Developer

MDF Commerce • Longueuil, QC

Mar 2023 – Mar 2026

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UI/UX Transformation: Spearheaded a complete UI overhaul for the Contract Management Lifecycle (CLM) platform using React JS, achieving WCAG 2.1 accessibility compliance and increasing overall platform efficiency by 80%.

▹

Dynamic Form Engineering: Developed and optimized complex contract generation workflows using Java, XML, XSLT, and React, which improved UI rendering performance by 20% and enabled dynamic data mapping.

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Automation Architecture: Architected a Self-Service Contract Configuration Panel that eliminated 95% of manual developer intervention for contract updates and reduced client turnaround time by 40%.

▹

Cloud & Scalability: Designed mission-critical serverless microservices using AWS Lambda and API Gateway, automating complex approval chains and ensuring high availability.

▹

System Modernization: Engineered a seamless E-Signature integration (OneSpan & DocuSign), replacing legacy manual workflows with a fully digital solution.

▹

Engineering Excellence: Enforced high quality standards by establishing CI/CD pipelines (Jenkins) and implementing JUnit tests (90% coverage), reducing technical debt by 35%.

React.js Java AWS Lambda API Gateway XML / XSLT OneSpan DocuSign Jenkins JUnit

Software Developer

The Minery Ltd • London, ON

Jan 2022 – Feb 2023

▹

Full-Stack Architecture: Led the architectural design (Frontend & API) for a nationwide employee tracking platform adopted by all Honda and Acura dealerships in Canada, defining core data schemas and deliverables.

▹

Operational Efficiency: Boosted dealership productivity by 25% by simplifying complex data workflows into a high-performance interface built with React.js and Material UI.

▹

Backend Security: Engineered robust backend services using Node.js, implementing secure Authentication and Authorization workflows to protect sensitive enterprise data.

▹

Mobile Optimization: Delivered a fully responsive UI architecture that drove a 40% increase in mobile platform usage, ensuring seamless access across all devices.

React.js Node.js Express.js Material UI Enterprise Auth RESTful APIs

Full Stack Developer

Sopcal • Kitchener, ON

Apr 2021 – Jan 2022

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E-Commerce Development: Built and scaled a multi-vendor e-commerce platform supporting local businesses, enabling vendors to independently upload images, manage dynamic pricing, and update inventory in real-time.

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Payment Integration: Engineered secure payment processing workflows using Stripe, ensuring seamless and PCI-compliant transactions for diverse local merchants.

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Full-Stack Implementation: Developed robust backend services with Python (Django) and highly responsive front-end interfaces using React.js and Material UI, creating a cohesive user experience.

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Security & Mentorship: Hardened application security to eliminate vulnerabilities and mentored junior developers on code quality, boosting team productivity by 25%.

Python Django React.js Stripe API PostgreSQL Security

Full Stack Developer & Technical Mentor

Clarusway • Virginia, USA

Apr 2020 – Sep 2022

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Technical Mentorship: Mentored cohorts of junior developers on JavaScript, React.js, and Node.js fundamentals, conducting code reviews and guiding them through complex problem-solving scenarios.

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Mobile Application: Developed a location-based restaurant discovery mobile app using React Native, implementing geolocation features to rank and display venues based on proximity and reviews.

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Web Application: Built a dynamic movie recommendation engine using React.js, featuring advanced search algorithms and personalized top list curation based on user preferences.

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API Architecture: Designed and deployed scalable RESTful APIs using both Node.js and Django, ensuring efficient data consumption for web and mobile clients.

React Native React.js Node.js JavaScript ES6+ Mentorship

Academic Pedigree

Computer Engineering & Mathematical Foundations

A dual university foundation combining rigorous engineering principles with formal mathematical logic.

B.Sc. in Computer Engineering

Istanbul Technical University (İTÜ)

09/2012 – 08/2016

Comprehensive computer science curriculum focused on distributed systems, data structures, algorithms, computer architecture, operating systems, and network protocols at Turkey's premier engineering institution.

B.Sc. in Mathematics Education

Dokuz Eylul University

09/2012 – 08/2018

Rigorous grounding in advanced mathematical logic, discrete mathematics, abstract algebra, and probability theory, translating into cleaner software architecture and algorithmic problem solving.

Full Stack Development Certification

Clarusway

Certified Full-Stack Developer

Intensive full-stack curriculum mastering modern cloud, microservices, React ecosystems, Python, Node.js, and CI/CD pipelines with industry-grade production deployments.

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guest@yusuf-macbook:~ (zsh)

Welcome to Yusuf Eryilmaz's Interactive Terminal v2.4

Type help to inspect available commands or click quick shortcuts below.

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Whether you're looking for architectural leadership, full-stack excellence, or cloud consulting.

Direct Email

yusuferyilmaz1819@gmail.com

Direct Phone

+1 (416) 836-1702

LinkedIn Profile

linkedin.com/in/yseryilmaz

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Location & Timezone

Kitchener, ON, Canada (EST / UTC-5)

Remote / Hybrid

Software Developer

Core Competencies & Engineering Disciplines

Real-Time AI & Streaming

Cloud & Serverless Infrastructure

Frontend & Mobile Ecosystem

Enterprise Backend & Integrations

Complete Technical Toolkit

Architected Solutions & Flagship Projects

Real-Time AI Avatar Streaming & Voice Ecosystem

Enterprise Contract Lifecycle Management (CLM)

Nationwide Dealership Employee Tracking System

Multi-Vendor Merchant E-Commerce Platform

Proximity-Based Restaurant Discovery App

Dynamic Recommendation Engine

Professional Experience & Engineering Leadership

Architectural Design Lead & Software Developer

Software Developer

Software Developer

Full Stack Developer

Full Stack Developer & Technical Mentor

Computer Engineering & Mathematical Foundations

B.Sc. in Computer Engineering

B.Sc. in Mathematics Education

Full Stack Development Certification

Developer Terminal Console

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