Chapter 01 · The People

Lore & Crew

05 makers

A living record of our roots from Catechu to Halden Software, the minds behind the machine, and the shared convictions that guide every system we shape.

We are a multidisciplinary studio of software artisans, systems architects, and product designers. We reject assembly-line development: every system is shaped by hands that take pride in both the interface you feel and the database underneath.

guest@halden:~/crew$ cat prologue.txt

Our story first began under the name Catechu, founded on the principles of disciplined systems engineering, uncompromising performance, and pure software craftsmanship.

This year, we formally rebranded as Halden Software. While our identity has evolved, our core obsession remains unchanged: engineering resilient, durable software architectures that stand the test of time.

guest@halden:~/crew$ ls files/

guest@halden:~/crew$

Zeyad Elkurdi
Zeyad Studio Lead

Founder & Lead Engineer

Zeyad Elkurdi

System Design · Solution Procurement · Distributed Architecture

Founder and technical lead with over a decade of hands-on software engineering mastery. Specializing in high-level system design, complex domain modeling, and technical solution procurement. Fluent across all major language ecosystems with deep specialization in Go and TypeScript, backed by proficiency in Python, Zig, and C for low-level systems and performance-critical pipelines.

Years by domain

System Design & Architecture
10+y
Golang & Microservices
8y
TypeScript & Fullstack
7y
Systems (Zig / C) & Python
5y

Strengths

  • System Design & Procurement: Architecting resilient, cost-conscious foundations and procuring the right technical stack for complex business domains.
  • Polyglot Mastery: Primary focus in Go and TypeScript with deep multi-language proficiency (Python, Zig, C) across all major paradigms.
  • Zero-Heroics Reliability: Building deterministic software engines that remain maintainable and performant for years to come.

Arsenal: Golang TypeScript Python Zig C System Procurement

open file · /crew/zeyad
Elhashmi A. Naas
Elhashmi Frontend & AI

Software Engineer

Elhashmi A. Naas

Frontend · Mobile & App Dev · AI System Design

Software engineer with 7 years of deep product engineering experience. Specializes in building bespoke frontend architectures, native and cross-platform application development, and sophisticated AI system design. Core languages centered on Python and TypeScript, complemented by strong engineering proficiency across Go, Java, and Swift.

Years by domain

Software Engineering
7y
Frontend & App Dev
6y
Python & TypeScript
5y
AI System Design
4y

Strengths

  • AI System Design: Architecting intelligent workflows, LLM tool pipelines, and automated reasoning integrations.
  • Cross-Platform & App Dev: Delivering responsive, high-performance web applications and mobile experiences in Swift and Java.
  • Frontend Architecture: Crafting high-fidelity UI systems in TypeScript with intuitive interactions and robust state management.

Arsenal: Python TypeScript Go Java Swift AI System Design

open file · /crew/elhashmi
Saeed Ashour
Saeed 25y Veteran

Cloud Engineer & Cybersecurity Specialist

Saeed Ashour

Cloud Engineering · Cyber Defense · C / C++ · Security in Go & Rust

A 25-year systems veteran dedicated to mission-critical infrastructure, binary defense, and enterprise cybersecurity. Primarily working in C and C++, with ongoing security engineering in Go and memory-safe systems research in Rust. Specializes in impenetrable cloud topology design, attack surface reduction, and low-level protocol security.

Years by domain

Cybersecurity & Cloud
25y
C & C++ Systems
20+y
Infrastructure Hardening
15y
Go Security & Rust
4y

Strengths

  • Defensive Cloud Topologies: Designing fortified multi-cloud and bare-metal environments immune to single-point compromise.
  • Low-Level Systems Security: Deep expertise in C/C++ memory architectures, binary auditing, and modern Go/Rust tooling.
  • Threat Mitigation & Resilience: Zero-trust network segmentation, cryptographic verification, and bulletproof security posture.

Arsenal: C C++ Go (Cybersecurity) Rust Cloud Security Linux Hardening

open file · /crew/saeed
Muhammad Abu Hajar
Muhammad Frontend & UX

Jr. Engineer

Muhammad Abu Hajar

Frontend Engineering · JavaScript & TypeScript · UX Design

Frontend and interaction engineer passionate about fluid user experience design and modern web interfaces. Focusing on JavaScript and TypeScript architectures, translating complex product requirements into responsive, elegant, and tactile digital surfaces with fine UX polish.

Years by domain

Frontend Engineering
3y
UX & Interaction
3y
TypeScript & JS
2y
Design Systems
2y

Strengths

  • Intuitive UX Design: Developing clean user journeys, wireframes, and ergonomic interaction patterns.
  • Modern Frontend: Building fast, responsive layouts using TypeScript, modern JavaScript, and Tailwind CSS.
  • Visual Polish: Obsessing over component micro-interactions, responsive states, and layout cohesion.

Arsenal: JavaScript TypeScript UX Design Tailwind CSS Figma HTMX

open file · /crew/muhammad
Takumi Yamada
Takumi Backend & Linux

Jr. Engineer

Takumi Yamada

Backend Engineering · Database Architecture · Linux Expert

Backend specialist and Linux expert with 3 years of systems engineering depth. Passionate about compiled languages and database architecture, building robust services in Go, Rust, Odin, and Zig, while wielding Python whenever rapid automation is required.

Years by domain

Backend & Linux
3y
Database Architecture
3y
Go / Rust / Odin / Zig
2y
Python Automation
2y

Strengths

  • Linux & OS Internals: Deep understanding of Unix paradigms, kernel tuning, process isolation, and server administration.
  • Database Architecture: Crafting optimized SQL schemas, query indices, transactional consistency, and data caching.
  • Modern Systems Tooling: Leveraging high-performance compiled languages (Go, Rust, Odin, Zig) for specialized services.

Arsenal: Go Rust Odin Zig Python Linux PostgreSQL

open file · /crew/takumi

04 tenets

Values

Great software isn't born from process alone—it stems from shared conviction. These tenets are the ethos that unites our work and defines how we build.

  1. Durability & Longevity

    Software as a Durable Artifact

    We build for the decade, not the sprint.

    We treat every codebase as an enduring artifact. We avoid the treadmill of ephemeral trends and bloated dependencies, favoring clean architecture, plain data models, and maintainable patterns that stay robust long after launch.

  2. Radical Transparency

    Radical Transparency & Ownership

    No black boxes. No hostage codebases.

    We believe clients must have full ownership of their systems. We deliver complete source repositories, comprehensive runbooks, and clear architectural documentation so that you are never locked into any vendor—including us.

  3. Mastery & Velocity

    Craft Over Noise

    Small teams, high velocity, unmatched care.

    We reject bureaucratic bloat and endless alignment meetings. By keeping our team compact and deeply skilled, we move with extreme agility, obsessing over the details that elevate ordinary applications into extraordinary tools.

  4. Applied Discovery

    Play with Purpose

    Continuous discovery directly fuels production.

    The experiments we run in our Sandbox and the lessons distilled in our Codex are not distractions—they are our R&D engine. Constant curiosity keeps our blades sharp and our production work ahead of the curve.

guest@halden:~/crew$ cat sign-off

Building software with intention, depth, and human connection.

guest@halden:~/crew$ cd /cases

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