Hussein Al Khayyat

Software Engineer

I build backend systems, APIs and low-level software, with experience across microservices, emulators, compilers, game engines and commercial game development.

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Professional work

Experience

Backend engineering, gameplay programming and technical leadership across remote and commercial development teams.

09/2025 — 03/2026 · Remote

Software Engineer Intern

UniPin

  • Developed and built a Kotlin/Spring Boot backend microservice in a distributed microservices architecture, focusing on reliable integration behaviour and clean service boundaries.
  • Developed GraphQL APIs using Netflix DGS for internal and external platform integrations, validating data flow, edge cases and database-backed behaviours across services.
  • Developed a secure signed-link generation system for merchant integrations, taking care of security-sensitive inputs and integration scenarios.
  • Used tooling like PostgreSQL, Liquibase, Docker and Kubernetes for schema changes, deployments, troubleshooting and environment-level issue isolation.

03/2025 — 09/2025 · Remote

Gameplay Programmer

Segritude Games

  • Developed and maintained gameplay systems in C++ and Blueprints within Unreal Engine 5, validating feature behaviour through iterative builds and team review.
  • Reproduced, debugged and fixed gameplay logic issues affecting stability, performance and user-facing behaviour.

02/2024 — 02/2025 · Dundee, UK

Lead Programmer

Catloaf Studio

  • Led development of gameplay systems for a commercial Steam release, coordinating technical direction and programming tasks within a small team.
  • Implemented turn-based combat, save/load systems and core game logic with emphasis on correctness, maintainability, performance and regression-safe changes.

Selected work

Projects

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Client project · React · Node.js · Express · PostgreSQL

Legal Case Management Platform

Built for a prospective law firm client to manage clients, employees, legal cases, assigned tasks, documents and case statuses from one responsive dashboard.

Implemented session authentication, role-based permissions, secure password hashing, search, pagination, file attachments and PostgreSQL-backed workflows.

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Emulator · C++ · SDL2

Game Boy Emulator

A C++ emulator built to understand CPU, memory and graphics hardware. It runs Game Boy games and includes debugging tools.

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Emulator · C++ · OpenGL · MIPS

PlayStation 1 Emulator

A PlayStation emulator that can boot and run games. Building it taught me how the MIPS CPU, memory and GPU work together.

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Compiler · C++ · x86

Custom Compiler

A compiler for a small C-like language. It includes lexing, semantic analysis, control-flow graphs, intermediate representation and code generation.

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Game engine · Java · OpenGL

Custom Game Engine

A 2D and 3D engine I started as a teenager and improved through real projects, including ray tracing, a Minecraft-style prototype and several games.

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Commercial game · Unity · C#

Book of Abominations

An eldritch monster-collecting RPG released on Steam. I worked on it as part of a development team.

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Operating system · C · x86 assembly

Custom x86 OS

A small operating system built from scratch with paging, graphics and keyboard and mouse input.

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Game jam · Custom engine

Linker

A one-week prototype combining combat and base building. I created the engine, gameplay and art for the project.

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About

I learn by building.

I enjoy working close to the hardware and understanding what software is doing underneath the surface.

Most of my personal projects begin with a simple question: how does this system work? I then build my own version to find out.

Contact

Let’s talk.

Email is the fastest way to reach me.

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