An engineering company with a long attention span.

What we are

Yaazhi Systems is a telecom-rooted systems engineering company. We architect, build, integrate and assure carrier-grade software — and we take the technical leadership role where an organisation needs the direction more than the hands.

Telecom is an unforgiving domain. The specifications are long, the interfaces are exact, and a system that is approximately right is simply broken. That standard is the whole of what we sell, and it is why the rest of what we do — platform work, AI, assurance — is held to the same line.

What we have built

A 4G and 5G network, end to end, in our own lab — radio access through mobile core to IMS voice. Specifically:

• A 5G radio access stack covering the central unit, control and user plane, and the distributed unit, over O-RAN Open Fronthaul 7.2. It has run three-sector fronthaul bidirectionally, with the packet captures kept.
• A 4G evolved packet core, a 5G core and an IMS, with registration proven across EPC and IMS against a shared subscriber database, and VoLTE call setup and media captured end to end.
• Subscriber load simulation over NGAP, S1AP and NAS at tens of thousands of simulated subscribers, to answer what happens at scale.

The stack is currently under proof of concept in a customer lab. It has not yet run on a live operator network carrying commercial traffic — we would rather say so here than have you find it during an integration.

Core philosophy

Three things sit under everything we do, whatever the sector and whatever the technology — and a fourth that only exists when the three hold together.

• Systems thinking. Thinking in parts within a whole, and the whole within each part — which is what architecture is. A change to one component is a change to everything around it, so we design for the interactions and the failure paths rather than the boxes, and we write the reasoning down, so the shape of the system outlives the people who chose it.
• AI. In the product and in the work. We build models and AI-driven applications for customers, and we turn the same tools on our own engineering — reading unfamiliar code, drafting tests, catching what a review would miss. Always where the output can be checked: unverifiable and unusable are the same thing.
• Execution. Shipping. A design that is not running somewhere is still a document. We would rather put something working in front of you early and keep going. We avoid preventable rework through architecture and verification, not by slowing down.
• Alignment. The three are not a menu. A system thought through but never shipped, or shipped without being thought through, fails in its own way. The work holds when all three point the same direction.

What that looks like in practice

Four habits follow, and we do not negotiate them away under schedule pressure.

• Design is a deliverable. Requirements and architecture come with the code, not after it. A system nobody can explain in a year has not really been delivered.
• Every component states what it needs. Compute, memory and storage are written into the design rather than discovered during deployment. If we cannot size it, we do not understand it yet.
• Claims ship with evidence. Results come with the logs, captures and configurations behind them. Nothing rests on trust that could rest on a file.
• Tests are written to break things. A test framework is the floor. On top of it we write adversarial tests — malformed input, exhausted resources, hostile timing — and they run green before anything is handed over.

How we handle your work

Code, documents and data you share with us are held in confidence and used only for your engagement. Confidentiality is a term of the contract rather than a courtesy, and we are glad to sign before you send anything at all.

Ownership of what we build, the reuse we may and may not make of it, and any third-party components involved are all defined in the contract before work starts. Nobody should have to guess who owns a deliverable.

Working with us

Engagements tend to be scoped per deliverable rather than per head. You know what you are getting and what it costs before it starts, and the deliverable is a working thing with documentation and evidence attached — not a timesheet.

If a piece of work is outside what we can do well, we will say so. That is cheaper for everyone than finding out later.

The name

The yaazhi is a guardian figure from Hindu mythology, carved into the pillars and gateways of South Indian temples. It stands at the threshold of something worth protecting, and it has been standing there for centuries.

That is the idea, and it is the mark: a shield.

The mark

The shield stands for trust. Its three faces are what the work is built from. The Y between them is not drawn at all — it is the space the three leave when they line up.