WorkExperienceCapabilitiesWritingBackgroundContact Resume
Available for backend and full-stack roles

$ whoami / systems-minded product engineer

Yusuf NaeemAbd El-Hakim

Backend-leaning full-stack software engineer

I build production systems end to end, from APIs and data models to security boundaries and useful product surfaces. My strongest work turns messy operations into dependable software.

Explore selected work Download resume
APIsData systemsApplied securityProduct delivery
Yusuf Naeem Abd El-Hakim

01 systems-minded / people-first

Live System Radar

Core Engineering Pillars & System Matrix

4 Business EntitiesUnified in auditable pipeline

Backend & APIs

Server-side field permission filtering, atomic REQ identifier sequences, and strict REST API contract boundaries.

Core Stack Icons & Tools
Next.jsTypeScriptPostgreSQLPrismaNextAuth
Inspect in NexFlow

01 / selected work

Systems built for real constraints

Four products, four different problems. Each story focuses on the decision that made the system dependable.

Private beta
01
Learning completion product

commit_

SaaS · education · behavior design

A curriculum tracker that turns study sessions into commits, progress into a contribution graph, and unfinished learning into a visible completion loop.

Next.jsReactTypeScriptPrismaSQLiteResend

Verified signals

Completion looplog → streak → next action → nudge → celebrate
SQLite → Postgressame product model across local and production environments
Private betastatus is intentionally conservative until public access is verified
Read case study Visit product
An illustrative roadmap view showing a study session becoming progress, pacing, and the next action.
  • 01
    Curriculum as a hierarchy

    A flat task list would make ETA and roadmap behavior brittle as curricula change.

  • 02
    ETA without shame

    The product treats schedule changes as normal state transitions, not user failure.

  • 03
    Operational reminders

    The product remains useful without making email delivery a hard dependency for local work.

Public beta
02
Local-first media workflow

Videx

Python · systems · privacy

A private local video and audio download manager with a guided CLI, browser interface, persistent queue, and no hosted processing backend.

PythonFastAPISQLiteyt-dlpFFmpegReact

Verified signals

Local-firstno Videx download backend or user database
80% gateconfigured Python coverage threshold
One engineCLI and local browser app share queue services
Read case study Visit product Source Documentation
A visual map of the CLI, local browser app, queue daemon, and loopback service.
  • 01
    SQLite as a process boundary

    A durable local queue gives the browser and CLI one source of truth without adding a hosted service.

  • 02
    Loopback-only service

    The local network boundary is part of the product’s privacy model, not merely a deployment detail.

  • 03
    Shared plans and safe recovery

    The queue owns recovery so a terminal closing does not make a user restart the whole workflow.

Rebuilding
03
Relationship intelligence product

Orbit

SaaS · AI · multi-tenant data

A relationship operating system that turns professional contacts into a queryable, visual, and bilingual workspace.

Next.jsTypeScriptSupabaseGemini AIStripeTanStack Query

Verified signals

Database isolationtenant boundaries enforced with PostgreSQL RLS
Bilingual UXEnglish and Arabic interface with RTL support
Rebuildingpublic landing page currently signals an offline product
Read case study
A conceptual network view showing people, roles, and relationship strength without exposing real contacts.
  • 01
    RLS-first tenancy

    Application-only tenant checks create too many places for a future feature to get wrong.

  • 02
    Graph plus semantic search

    The graph is for orientation; search is for retrieval. They solve different jobs and should not be collapsed.

  • 03
    Billing as a system boundary

    Payment events are external facts, so the application treats them as idempotent server-side inputs.

Internal production
04
Internal production platform

NexFlow

B2B operations · security

A lead pipeline platform that replaced conflicting spreadsheets across four business entities with one auditable, role-aware workflow.

Next.jsTypeScriptPostgreSQLPrismaNextAuthWhisper AI

Verified signals

4 entitiesunified in one pipeline
Zero duplicatesreported after REQ-coded intake replaced Excel
Hours → minuteslead entry and routing workflow
Read case study Source Documentation
Session, role, business-unit, department, and field filtering converge before PostgreSQL.
  • 01
    Server-side field permissions

    A UI-only permission check would leave sensitive data in network payloads.

  • 02
    Atomic REQ identifiers

    MAX + 1 was rejected because concurrent writers could observe the same value.

  • 03
    Migration with operational continuity

    The import flow was designed as a controlled workflow, not a one-off script.

02 / experience

Where the systems met reality

The work spans internal platforms, security assessments, commerce, and API teams. The common thread is ownership from problem definition through production.

Apr 2024 - PresentCairo, Egypt · Hybrid

Egyptian Packaging & Plastic Systems (EPPS)

Software Engineer

Full-time since Jun 2024. Builds and operates internal platforms for lead pipeline, asset management, and logistics tooling, while owning reliability, security, and IT governance across the group.

  • Built and now operate an internal B2B lead pipeline platform replacing spreadsheet tracking across four business entities, holding roughly 2,000 records for the 8 to 10 staff running marketing capture through to closed sale
  • Designed a full audit trail and an atomic identifier generator that keeps records conflict-free under concurrent writes
  • Resolved a Marketing and Sales data-ownership conflict with field-level, server-side access control that strips restricted fields from API payloads before they reach the client
  • Built SC 3D Optimizer, applying a 3D bin-packing heuristic to container load planning under door-clearance constraints, cutting planning time fourfold and improving space utilisation (React, Three.js)
  • Modelled the data and lifecycle workflows for the IT asset management platform, tracking roughly 3,000 assets with full check-out and check-in history
  • Extended the company's public web presence with new pages and features, taking each from business requirement to production deployment
  • Integrated analytics and tracking tools across the sites, instrumenting performance measurement to guide optimisation
  • Own reliability and security across 25+ domains and 7 production sites through caching, automated backups, database cleanup, and web server hardening
  • De-risked capital allocation by delivering cost-benefit and ROI analyses to executive stakeholders, translating business requirements into Power BI dashboards and written executive summaries
  • Co-architected IT governance, standard operating procedures, and Active Directory infrastructure for 90+ users
  • Automated repetitive IT and reporting workflows with Python scripts, reducing manual overhead and improving consistency across operations
Node.jsExpress.jsPostgreSQLREST APIsReactThree.jsPythonTypeScriptLLMs / WhisperActive DirectoryPower BIWordPressGit
Sep 2024 - Dec 2024Cairo, Egypt · Hybrid

WE INNOVATE

Offensive Security Engineer (Intern)

Executed white-box and black-box penetration testing across enterprise web, mobile, and infrastructure systems.

  • Exploited web, mobile, and infrastructure vulnerabilities against the OWASP Top 10, documenting every finding with a reproducible proof-of-concept and a remediation path (Burp Suite, Metasploit, Wireshark)
  • Ran Active Directory and network penetration tests, mapping privilege-escalation and lateral-movement paths across the target environment
  • Wrote Python tooling to automate recurring reconnaissance and vulnerability-assessment workflows, beyond the defined scope of the internship
PythonBurp Suite ProMetasploitWiresharkOWASP Top 10Kali LinuxActive Directory
Nov 2023 - Oct 2024Ontario, Canada · Remote

HomeBay Furniture

Software Engineer

Built and optimised the e-commerce platform for a Canadian furniture brand, improving site performance and eliminating manual catalogue overhead.

  • Automated product catalogue and asset synchronisation through the Google Sheets API, removing a recurring manual cataloguing task from the team's weekly cycle (Python)
  • Extended WooCommerce product-management and checkout functionality, and applied caching, database indexing, and image optimisation across the storefront
  • Grew organic search visibility through structured keyword analysis, meta-tag optimisation, and on-page SEO improvements
JavaScriptPythonWordPressWooCommerceREST APIsGoogle Sheets APIHTMLCSS
Aug 2023 - Nov 2023Cairo, Egypt · Hybrid

Kites Software

Software Engineer (Intern)

Built test-driven RESTful APIs for Egypt's first SaaS ERP in an Agile/Scrum engineering team.

  • Built and shipped RESTful API endpoints test-first for Egypt's first SaaS ERP for import and distribution, writing integration tests in BDD style with Cucumber (Java, Spring Boot, PostgreSQL)
  • Diagnosed and fixed QA-reported defects inside a full Agile and Scrum cycle
  • Authored onboarding documentation that the team adopted for subsequent intern cohorts
JavaSpring BootPostgreSQLREST APIsBDDCucumberLiquibaseGitScrumJira
Jun 2023 - Aug 2023Cairo, Egypt · Remote · Part-time

Tact Decoration

Business Analyst

Led the company's first digital transformation — replacing informal, untracked coordination with a centralised system.

  • Led the company's first digital-transformation initiative, replacing informal, untracked coordination with a centralised system
  • Built a CRM and operations hub in Notion from scratch, giving site engineers, architects, and supervisors a single platform for task assignment and progress tracking
  • Redesigned cross-functional workflows between field and office teams, and documented the new process as a standard other staff could follow
NotionSystems ThinkingProcess DesignDigital Transformation
Jan 2022 - Jun 2022Remote

Self-employed

Freelance Full-Stack Developer

Built and shipped websites and online storefronts for small businesses end to end, working directly with each owner without a team or supervision.

  • Built and shipped websites and online storefronts for small businesses end to end, from static frontend (HTML, CSS, vanilla JavaScript) through backend logic and data (Django, Django REST Framework)
  • Worked directly with each business owner to scope requirements and turn them into a working site without a team or supervision
  • Implemented storefront features, including product catalogues and inquiry forms, backed by Django REST Framework APIs
PythonDjangoDjango REST FrameworkJavaScriptHTMLCSSSQLite

03 / capabilities

How I think about engineering

Tools change. These are the problem spaces I can take responsibility for.

01

APIs and backend systems

REST design, Spring Boot, Node.js, server-side validation, background work, and integration boundaries.

02

Data and persistence

PostgreSQL, SQLite, Prisma, RLS, transactions, migrations, audit history, and query-aware models.

03

Security and authorization

OWASP-informed thinking, field-level access control, tenant isolation, secure local services, and least privilege.

04

Applied AI

Whisper pipelines, semantic search, streaming generation, prompt context, and product boundaries that keep AI useful.

05

Product delivery

Turning ambiguous workflows into shipped interfaces, usable defaults, documentation, and measurable operational change.

06

Infrastructure ownership

Vercel, Nginx, Docker, caching, backups, domain hygiene, deployment checks, and cost-aware operations.

04 / more work

Smaller projects, different muscles

The flagship case studies show depth. This archive shows range without competing for attention.

01

Full-Stack · AI

Throughline

Behavioral Intelligence Platform

Transforms CliftonStrengths reports into structured behavioral insights through parallel AI generation, persistent review state, and specificity checks. The pipeline works end to end but is not yet public.

Next.jsTypeScriptClaude AIPostgreSQLDrizzle ORM
Source
02

Algorithms · Visualization

EPPS Container Optimizer

3D Bin Packing & Logistics Tool

Computes container placement with 3D bin-packing, door-clearance validation, visual comparison, and PDF export for logistics teams.

ReactThree.jsVite3D AlgorithmsBin Packing
Live Source
03

Educational · CS

Algorithm Visualizer

Interactive CS Learning Platform

Explains 15+ algorithms and eight data structures through step-by-step animation and complexity breakdowns.

ReactViteJavaScriptCanvasAlgorithms
Live Source
04

Academic · Full-Stack

iREAD

Reading Platform & Digital Bookstore · 2023

Graduation project with one REST API serving Flutter and React clients across reading history, reviews, commerce, and community workflows.

FlutterReactREST APIMobile + WebGraduation Project

05 / writing

Technical notes with a point of view

All articles
Sep 25, 20254 min read

Correlation vs. Causation: Why Our Brains Keep Falling for the Wrong Story

There’s an old story from Russian folklore about a governor who noticed something alarming: in the areas where more people were sick, the number of doctors was also higher.

Read on Medium
Sep 16, 20253 min read

Logical Thinking in Analytics: The Skill Nobody Talks About (But Everyone Needs)

Whenever people talk about data analytics, the conversation usually turns to tools. Which dashboard should we use? Which programming language is better? How do we visualize the data?

Read on Medium
Sep 15, 20253 min read

The Hidden Power of Questions in Data Analytics

In today’s world, data feels infinite. Organizations invest heavily in dashboards, KPIs, and analytics platforms, believing that more data equals better decisions. Yet, despite these investments, many leaders remain frus

Read on Medium

06 / background

The context behind the work

A compact record of the foundations that inform how I build, communicate, and keep learning.

Education & Foundation

B.Sc. Computer Science & IT

Software Engineering Major · Ahram Canadian University (ACU)

Sep 2019 - Jul 2023 · Cairo, Egypt
Overall GPA3.36 / 4.00
Final Term4.00 / 4.00
Grad ProjectGrade A+
Communities & Peer Tutoring
ACU Competitive Programming CommunityCyberTalents

Peer tutoring for classmates in Algorithms, Software Engineering, Design Patterns, and Information Security.

Verified Certifications & Training
CS50: Introduction to Computer ScienceFoundations
HarvardX
Offensive Security EngineeringApplied Security
WE INNOVATE2024
Web & .NET Development Summer TrainingWeb Systems
Information Technology Institute (ITI)2022
Forward ProgramLeadership & Strategy
McKinsey.org
Signals & Spoken Languages
🏆
Honourable MentionEgyptian Collegiate Programming Contest (ECPC) (2021)

Languages & Mobility

ARArabic
Native / Bilingual
ENEnglish
Professional C1
DEGerman
Limited Working

07 / contact

Let’s build something dependable.

I’m open to backend and full-stack engineering roles, infrastructure work, and collaborations involving systems design, APIs, data, or applied security.

Email me LinkedIn GitHub
Cairo, Egypt · open to remote collaboration