Yousef Kakhki

System Architect & Infrastructure Lead

Bridging Hardware Efficiency with Cloud-Scale Architecture

System Architect & Infrastructure Lead specializing in WebRTC, High-Frequency Trading, and Linux Kernel optimization. Expert in distributed systems, real-time streaming, and enterprise-grade fintech platforms. M.Sc. in System Design.

1,200+

Concurrent Users

WebRTC / HLS

Sub-100ms

Latency

Trade Execution

78%

Cost Reduction

Infrastructure

View experience Get resume

About

With an M.Sc. in System Design from Amirkabir University of Technology (Tehran Polytechnic), I bridge hardware-level efficiency with cloud-scale architecture. My expertise spans from Linux kernel optimization and embedded systems to architecting hybrid WebRTC/HLS infrastructures serving thousands of concurrent users. My career trajectory showcases a rare combination: deep systems programming expertise coupled with high-level architectural leadership. From optimizing ARM-based IoT devices with custom Yocto distributions to designing sub-100ms high-frequency trading engines, I architect solutions where performance and reliability are non-negotiable. As Head of Software at Capitalino, I led the award-winning AI Hologram project (Best Booth, ITEX 2024) and architected digital investment platforms processing millions in monthly volume. My recent work includes production-grade WebRTC systems with NATS JetStream signaling, serving 1,200+ concurrent users while reducing infrastructure costs by 78%. I believe in leading by example—contributing directly to codebases while orchestrating cross-functional teams. Whether it's building P2P cryptocurrency exchanges, designing atomic OTA update pipelines for 5,000+ IoT devices, or implementing Greedy Knapsack algorithms for optimal trade execution, I deliver systems that scale.

ITEX 2024 — Best Booth Award

AI Hologram Project

Computer vision, NLP, holographic projection

Official Recommendation

CEO, Capitalino

View full letter →

Credentials

M.Sc. System Design — Tehran Polytechnic
IELTS 7.5
EU Blue Card Eligible

Experience

Solutions Architect (Project Contract)

HonarAmoozesh

(Jul 2025 - Nov 2025)

•Architected production-grade dual-stream WebRTC (LiveKit) + HLS system serving 1,200+ concurrent users while reducing infrastructure costs by 78%.
•Engineered sub-100ms signaling latency using NATS JetStream for seamless user role promotion and dynamic room management.
•Deployed scalable LiveKit SFU clusters with HAProxy load balancing and Prometheus monitoring.

LiveKitWebRTCHLSNATS JetStreamGoHAProxyPrometheus

Head of Software & AI Development

Capitalino (CITEX Spin-off)

(Oct 2023 - Jun 2025)

•Led the AI Hologram Project, winning Best Booth at ITEX 2024. Architected real-time AI-driven interactive displays integrating computer vision, NLP, and holographic projection systems.
•Architected Digital Investment Management Dashboard with real-time portfolio analytics, risk assessment algorithms, and blockchain API integration for crypto asset tracking.
•Designed high-throughput OTC Exchange Platform processing $2M+ monthly volume with 99.9% uptime using Docker Swarm and Redis-backed rate limiting.
•Led customization and deployment of enterprise ERP system (Odoo). Built and managed 4-person engineering team with Agile/Scrum workflows.

PythonFastAPINode.jsDocker SwarmRedisOdooPostgreSQL

Senior Backend Engineer

Avin Avisa

(Apr 2021 - Sep 2023)

•Architected sub-100ms P2P matching engine utilizing Greedy Knapsack algorithms for optimal trade execution in high-frequency cryptocurrency markets.
•Designed ACID-compliant transactional ledgers using PostgreSQL with row-level locking. Integrated Web3.js for on-chain verification.
•Reduced API response times by 60% through Redis caching and database optimization. Achieved 10,000+ requests/second throughput.

Node.jsPostgreSQLWeb3.jsRedisEthereumREST APIs

Systems Engineer (Embedded Linux)

Batna

(Sep 2019 - Mar 2021) • Concurrent with M.Sc. Studies

•Modified Linux kernel drivers and boot sequences using systemd parallelization, reducing system initialization time by 40% on ARM-based hardware.
•Designed atomic OTA firmware update pipeline for 5,000+ IoT devices using dual A/B partitions, rollback mechanisms, and delta patching.
•Developed custom Yocto/Buildroot distributions for resource-constrained targets with integrated CI/CD pipelines.

CLinux KernelYoctoBuildrootsystemdJenkinsBash

Android Systems Developer

Azma Data Structure

(Apr 2016 - Aug 2019)

•Developed native modules using Android NDK (C++) for GPS tracking, achieving sub-meter accuracy and 50% battery reduction through sensor fusion.
•Engineered fragment-based state synchronization with conflict resolution using Operational Transformation and background sync queues.
•Built scalable Android apps serving 10,000+ users with biometric authentication, encrypted storage (SQLCipher), and real-time sync via FCM.

Android NDKC++JavaSQLCipherFCMKotlin

Architecture case studies

Selected system design and delivery work: challenge, solution, and measurable results.

HonarAmoozesh

Solutions Architect (Project Contract)

Jul 2025 – Nov 2025

LiveKitWebRTCHLSNATS JetStreamGoHAProxyPrometheus

Challenge

Scale a virtual classroom to 1,200+ concurrent users with low latency and sustainable cost. Support real-time WebRTC and HLS fallback, plus seamless role promotion and room management.

Solution

Dual-stream architecture: LiveKit SFU for WebRTC; NATS JetStream for sub-100ms signaling (roles, dynamic rooms). HLS for passive viewing at scale. HAProxy in front of LiveKit; Prometheus for observability.

Results

•1,200+ concurrent users on hybrid WebRTC/HLS.
•78% infrastructure cost reduction with improved reliability.
•Sub-100ms signaling for role and room operations.

1,200+

Concurrent users

78%

Cost reduction

<100ms

Signaling latency

Architecture

Mermaid diagram

flowchart TD
  C[Browser / App]
  C <-->|signaling sub-100ms| N[NATS JetStream]
  C -->|WebRTC| H[HAProxy]
  H --> L[LiveKit SFU]
  L --> C
  C -->|playback| HLS[HLS Stream]
  L --> P[Prometheus]

Avin Avisa

Senior Backend Engineer

Apr 2021 – Sep 2023

PostgreSQLRedisWeb3.jsNode.jsEthereum

Challenge

Deliver a P2P matching engine for high-frequency crypto trading: fair, optimal execution and sub-100ms response under load, with ACID integrity and on-chain verification.

Solution

Matching engine using Greedy Knapsack–style algorithms for order allocation. PostgreSQL with row-level locking for ledgers; Redis for cache and throughput. Web3.js for on-chain verification. API and DB tuning to 10,000+ req/s.

Results

•Sub-100ms P2P matching with deterministic, optimal execution.
•60% API response-time reduction via Redis and DB optimization.
•10,000+ req/s throughput with full audit trail and on-chain verification.

<100ms

Matching latency

10k+

Requests/sec

60%

Faster API

Architecture

Mermaid diagram

flowchart TD
  A[API] --> N[Node.js]
  N --> M[Matching Engine]
  M --> P[(PostgreSQL)]
  M --> R[(Redis)]
  N --> W[Web3.js]
  W --> E[Ethereum]

Capitalino (CITEX Spin-off)

Head of Software & AI Development

Oct 2023 – Jun 2025

PythonFastAPINode.jsDocker SwarmRedisOdoo

Challenge

Ship three production systems: AI Hologram exhibit (ITEX 2024), digital investment dashboard with real-time analytics and crypto integration, and a high-throughput OTC exchange—all highly available with clear ownership.

Solution

Three pillars: (1) AI Hologram—computer vision, NLP, holographic projection, backend. (2) Investment dashboard—portfolio analytics, risk algorithms, blockchain API. (3) OTC platform—Docker Swarm, Redis-backed rate limiting, operational discipline for 99.9% uptime.

Results

•Best Booth Award at ITEX 2024 for the AI Hologram project.
•OTC platform at $2M+ monthly volume with 99.9% uptime.
•Investment dashboard with real-time analytics and crypto asset tracking.

ITEX 2024

Best Booth

$2M+

Monthly volume (OTC)

99.9%

Uptime

Architecture

Mermaid diagram

flowchart TD
  subgraph AI["AI Hologram"]
    CV[Computer Vision]
    NLP[NLP]
    BE[Backend]
  end
  subgraph DASH["Investment Dashboard"]
    A[Analytics]
    RA[Risk Algorithms]
    BC[Blockchain API]
  end
  subgraph OTC["OTC Exchange"]
    DS[Docker Swarm]
    R[Redis]
  end

Skills

Infrastructure & Architecture

•Microservices
•Event-Driven Systems
•DDD / CQRS
•API Gateway
•Service Mesh
•Load Balancing
•High-Availability
•Distributed Systems

Backend & Data

•Node.js(Expert)
•TypeScript
•Go
•Java / C++
•Python
•PostgreSQL(Advanced)
•Redis
•MongoDB
•Elasticsearch

DevOps & SRE

•Docker Swarm
•Kubernetes
•CI/CD (GitLab, Jenkins)
•Prometheus / Grafana
•ELK Stack
•Terraform
•Ansible
•Linux Administration

Specialized

•WebRTC (LiveKit)
•HLS Streaming
•NATS JetStream
•Linux Kernel
•Yocto / Buildroot
•Blockchain (Hyperledger)
•Web3.js
•AI / ML Ops

Projects

Award-Winning AI Hologram Project

Spearheaded the design and development of an innovative AI-powered hologram installation. The project was a major success, combining complex backend logic with an interactive user experience, resulting in the company winning the prestigious Best Booth at ITEX 2024.

My role:Technical & AI Team Lead

Tools:PythonAI/ML LibrariesFastAPIWebSocketDocker

Demo not available

Code not available

Digital Investment Management Dashboard

Architected and coded the heavy computational logic for a data-intensive investor dashboard, providing real-time analytics and portfolio management features for Capitalino's clients.

My role:Lead Backend Architect

Tools:Node.jsTypeScriptREST APIsMongoDBData VisualizationDocker

Demo not available

Code not available

Crypto-to-Fiat Payment Gateway

Designed and implemented a secure, high-performance gateway to bridge cryptocurrency transactions with traditional fiat payment systems. This mission-critical project enabled seamless and reliable currency exchange for users of the platform.

My role:Technical Architect

Tools:Node.jsREST APIsDatabase SecurityPayment Processing APIsNginx

Demo not available

Code not available

Financial Trading Gamification Platform

Engineered and launched a competitive gamification platform for financial trading simulations. The platform debuted at the Shiraz ITEX 2023 international exhibition to drive user engagement and demonstrate real-time data handling capabilities.

My role:Senior Software Engineer

Tools:Node.jsReactNext.jsWebSocketTailwind CSS

Demo not available

Code not available

Secure Over-the-Air (OTA) Update System

Led the end-to-end engineering of a secure software delivery pipeline for embedded Linux devices. This involved creating the package generation process, server-side infrastructure, and client-side update application, alongside performing deep, low-level kernel optimizations.

My role:Systems Engineer

Tools:LinuxCBashPythonJenkinsCI/CDNetwork Security

Demo not available

Code not available

GreedyLearner: Gamified Algorithm Tutor

Developed as my Master's thesis, 'GreedyLearner' is an Android application that gamifies complex computer science algorithms to improve student motivation and learning outcomes through a guided discovery approach. The app was successfully published on app stores.

My role:Solo Developer & Researcher

Tools:JavaAndroid SDKAndroid StudioGamificationNoSQL

Demo not available

View code

P2P Cryptocurrency Trading Platform

Architected and built a complete Peer-to-Peer cryptocurrency trading platform from the ground up. A key feature was the implementation of atomic transactions in MongoDB to guarantee financial data integrity, along with secure integration with the Ethereum blockchain via Web3.js.

My role:Lead Backend Developer

Tools:Node.jsTypeScriptMongoDBWeb3.jsEthereumREST APIsDocker

Demo not available

Code not available

Blockchain-Based Virtual Coin System

As a member of the university's Blockchain Committee, I developed a proof-of-concept virtual coin and reward system. The project utilized Hyperledger Sawtooth and Node.js to enable users to earn blockchain-based tokens from real-world transactions.

My role:Researcher & Developer

Tools:Hyperledger SawtoothNode.jsBlockchainREST APIs

Demo not available

Code not available

Testimonials

“Mr. Kakhki is a highly capable, disciplined, and solution-oriented professional whose presence adds value at every stage of a project—from design through delivery.”

Ali Mohammadian

CEO, Capitalino

Read Full Letter →

“His ability to bridge technical depth with strategic thinking made a significant contribution to the company's technical evolution and overall performance.”

Emran Mohades

COO, Capitalino

Read Full Letter →

Education

Master of Science in Computer Science (System Design)

Amirkabir University of Technology (Tehran Polytechnic)

2018 - 2021

•Tehran Polytechnic – Iran's #1 ranked university in Computer Science. GPA: 3.8/4.0
•Thesis: 'GreedyLearner' – A gamified algorithm learning platform with adaptive learning paths and real-time code evaluation (Node.js, React, PostgreSQL, Docker).
•Blockchain Committee Lead: Designed decentralized reward systems using Hyperledger Sawtooth with custom transaction processors for academic credit tokenization.
•Coursework: Advanced Algorithms, Distributed Systems, Cloud Computing, AI/ML.

Bachelor of Science in Computer Science

University of Bojnurd

2012 - 2017

•Teaching Assistant: Selected as TA for Data Structures, Advanced Algorithms, and Operating Systems across multiple semesters. Mentored 100+ students.
•Core Focus: Operating Systems Internals, Database Design, Network Protocols (TCP/IP), Compiler Design, Software Engineering.
•Capstone: Developed distributed file storage system with redundancy using Java RMI. Achieved 99% uptime in stress testing.

Writing

Scalable Virtual Classrooms: Implementing Hybrid WebRTC-HLS Architecture

livekitnatswebrtc

15 min

1 months ago

Scalable Virtual Classrooms: Implementing Hybrid WebRTC-HLS Architecture

A technical deep-dive into building 1000+ user virtual rooms using LiveKit, NATS JetStream, and a custom Node.js bridge for seamless user promotion.

Building a Premium Bilingual Portfolio with Next.js 15

A deep dive into creating a modern, bilingual developer portfolio with glassmorphism UI, RTL support, and production-ready Docker deployment.

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Contact me

If you have any questions or concerns, please don't hesitate to contact me. I am open to any work opportunities that align with my skills and interests.

[email protected]+989038158460

Tehran, Iran