# Javad Rajabzadeh - Senior Software Engineer

> Explore the personal portfolio and tech blog of Javad Rajabzadeh. Expert in Blockchain, IoT, and High-Performance Software Architecture.

Primary Website: http://javad.dev/
Markdown Homepage: http://javad.dev/index.md

## About Me
With over nine years of experience in software engineering, I specialize in architecting high-performance backend microservices, decentralized blockchain networks (Layer 1, 2 & 3), real-time AI/ML signal processing systems, and ROS2 robotics modules. Currently, I serve as Software Technical Lead & Senior SW Engineer at Sensifai, leading the engineering of scalable SaaS platforms integrating deep learning, video recognition, robotics, and edge IoT pipelines.

## Contact & Links
- GitHub: https://github.com/ja7ad
- LinkedIn: https://www.linkedin.com/in/ja7ad/
- Twitter / X: https://twitter.com/Ja7adR
- Email: ja7ad@live.com

## Technical & Leadership Skills
- Software Architecture & System Design: Distributed systems, Go (Golang), Python, Node.js, Microservices, gRPC, Docker, Kubernetes
- Technical Leadership & Business Strategy: Team leadership, B2B/B2C SaaS products, cloud cost & energy optimization, strategic roadmaps
- Blockchain & Web3 Infrastructure: Layer 1, 2 & 3 architectures, consensus protocols, Filecoin Lotus Devnet, TrustWallet Core, Solana NFTs
- Robotics, IoT & AI Systems: ROS2 (Robot Operating System) module engineering, real-time IoT pipelines, MQTT, ThingsBoard, PostgreSQL, MongoDB, Redis, TensorFlow

## Featured Projects
- DoRAI (ROS2): https://github.com/Sensifai-BV/dorai/
- Q-WiSE: https://sensifai-qwise.hf.space/
- Aerium: https://aerium.network/
- Meilisearch Go SDK: https://github.com/meilisearch/meilisearch-go
- TrustWallet Core: https://github.com/trustwallet/wallet-core

## Blog Posts (Markdown Links)

- [Optimally-Modified Log-Spectral Amplitude (OM-LSA): Post-Filtering for Speech Intelligibility](http://javad.dev/posts/omlsa-speech-enhancement-postfiltering.md): An in-depth mathematical and algorithmic guide to single-channel speech enhancement using Optimally-Modified Log-Spectral Amplitude (OM-LSA) post-filtering to boost speech intelligibility and eliminate musical noise.

- [Real-Time Multichannel Speech Enhancement: Inverse-Free Rank-N Matrix Updating on Edge Hardware](http://javad.dev/posts/rankn-multichannel-wiener-filter.md): Solving matrix inversion bottlenecks in Multi-channel Wiener Filtering (MWF) using neural covariance attention and complex Conjugate Gradient solver for low-power drone and robotics hardware.