Software architecture · real-time communication · technical writing

Siavash Arzhangi

I work on software systems where architecture, reliability, and product decisions meet.

Most of my work has been around communication platforms: systems that need to stay understandable as they grow. This site is where I keep longer notes from that work.

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I tend to care about clear boundaries, calm systems, and decisions that remain explainable later.

Work

A few areas I keep returning to.

Architecture and system design

Finding boundaries that make software easier to understand, change, and operate.

Real-time communication

VoIP, SIP, WebRTC, media flows, and the operational details that make them dependable.

Technical direction

Thinking through engineering choices in relation to product needs, team constraints, and the cost of change.

Perspective

I start with the constraints, not the tools.

Before choosing a pattern or a technology, I try to understand where the system can fail, what is likely to change, and what complexity is worth carrying.

Software architecture and system design

VoIP, SIP, WebRTC, and media systems

Distributed systems and production reliability

Technical direction and engineering trade-offs

Architecture for products that keep evolving

Research-driven technical writing

Writing

Notes from the work.

I write slowly here: field notes, mental models, and problems that do not fit into a quick answer.

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September 7, 2026

Forecasting Market Direction in the Iranian Stock Exchange Using Recurring Patterns

An in-depth quantitative analysis of the Tehran Stock Exchange using the Matrix Profile algorithm and technical indicators to forecast 90-day market cycles and identify high-probability trading signals.

On my desk

Current notes and questions.

A few things I am currently thinking through before they become longer writing.

Voipano's Call Center

Leading the architecture and development of Voipano's dedicated call center platform. designing real-time call flows, scalable communication services, and a reliable VoIP infrastructure.

X Project

Building a FinTech platform for the Forex market, exploring how market data, analytical systems, and AI-assisted processing can work together to produce more meaningful market intelligence.

Open-source VoIP Security Toolkit

Building an open-source toolkit for observing and protecting VoIP infrastructure. focused on SIP signaling, SBC monitoring, security events, and operational visibility.

Contact

Send a note.

If something here connects with what you are thinking about, a short message is enough.