SAMMUEL JANSSENS

Full-Stack Developer — YumanIT

IT Company - Verviers

March 2021 – October 2024

Key Projects:

• Complete ERP System: Development and optimization with multiple modules (customer portal, quotes, invoicing, inventory, calendar, etc.)
  Angular Laravel ERP
• Phishing Prevention Solution: Awareness platform including fake page generation, mass email sending, and tracking dashboard
  Laravel Vue.js Livewire Security
• Logistics Mobile Application: Warehouse truck entry management with driver information capture, electronic signature, and license plate reading
  Flutter Mobile
• Appointment Management System: Microsoft calendar integration, conditional forms, validation and automatic visitor notification
  Laravel Vue.js Microsoft API
• Website: Complete integration from design mockups

Cross-functional Achievements:

• Design and implementation of responsive UI/UX interfaces
• SEO strategies and Google Ads campaign management
• Architecture of full-stack solutions improving operational workflows

Business Intelligence Consultant — Technifutur

Competence Center - Seraing

Jan. 2026 – In Progress

• Intensive training: advanced SQL, dimensional modeling (Star/Snowflake), Data Warehouses, ETL/ELT
• Reporting and analytics with Power BI and DAX
• Business KPI definition, data dictionaries, translating business needs into technical solutions

Cybersecurity Assessment Certification — HackTheBox

Nov. 2025 – In Progress

• Application security assessment and vulnerability identification (OWASP Top 10)
• Penetration testing on web applications and APIs
• Secure development practices and remediation

Student — 42 Coding School

2019

• Successfully completed the 42 Piscine (highly selective program)
• Experience in C programming, algorithms, data structures, peer-to-peer environment

Web Development Program — Becode

2018

• Intensive full-stack development training
• Specialization in PHP, HTML, JavaScript

Creator & Developer — TCGLake

SaaS Platform for TCG Collection & Inventory Management (tcglake.com)

2024 – Present

• Complex data modeling: product catalog, granular inventory, multi-channel orders
• Multi-source integration via external APIs with data mapping and transformation
• Two-way stock and order synchronization via API
• Inventory dashboard: item count, listed value, average price, listing rate, breakdown by game and condition

Creator & Developer — CowCowTools

Analytics Dashboard & Data Pipeline (Archived)

Dec. 2023 – June 2024

• Automated data collection pipeline: scheduled Python scripts (cron) fetching data via multiple APIs, transformation and SQL database storage
• Analytics dashboard with KPI visualization: floor price, holder count, token volume, price evolution over time
• Multi-source aggregation: marketplace APIs (XOXNO, Frameit), blockchain data, smart contracts
• Scheduled collection: hourly (critical data) and daily (general statistics)
• 3,000 unique users, ~75 visitors/day, ~700 events/day

Creator & Developer — Yltra

Blockchain Verification Platform (yltra.xyz)

2024 – Present

• Containerized microservices architecture with Docker (each service in dedicated container)
• Holder verification via message signing, server-side validation, on-chain signature
• Snapshot dashboard, automatic Discord role attribution based on token ownership
• 76 verified users across 2 active Discord servers

Creator & Developer — Silencia

Prototype / Technical Experiment

April 2025

• Discord multiplayer game where two AIs compete: each AI must avoid saying its "forbidden word"
• Automatic Discord temporary channel management, turn system (5 messages/AI limit)
• OpenAI API integration: AI response generation based on player's custom prompts
• Victory detection system and game tracking (MongoDB + SQLite for temporary data)
• Developed in a few days as POC to test OpenAI integration and AI game design

Administrator — INSOGAMES

Trading Card Shop - Verviers

Nov. 2021 – Present

• End-to-end management: purchasing, inventory, card authentication, supplier relations (FR/EN)
• Invoicing (Odoo), quality checklists
• Online customer service (FR/EN), structured request resolution

Administrator & Organizer — Quokka Gaming

Competitive Gaming Association - Liège

2016 – 2019

• Tournament organization (e.g. Meltdown): planning, logistics, registrations
• Team coordination: role distribution, operational checklists, event-day runbook
• Game server management and installation (configuration, maintenance)
• Website development and maintenance for the association

WordPress Developer — SRPA (Royal Society for Animal Protection)

Animal shelter website

Sept. 2025 – Present

• WordPress development with custom plugin to sync adoptable animals from intranet to website
• Custom Post Types (CPT) usage to avoid impacting intranet during traffic spikes
• Custom theme adaptation and customization: animal pages, shelters, additional sections
• Synchronization of ~100 adoptable animals with automatic updates

Coach — Rails Girls Brussels

Free web programming introduction workshops for women

October 2018

• Facilitation of web introduction workshops for women
• Hands-on support for creating HTML pages and Ruby on Rails applications
• Promoting inclusive pedagogy in development learning

Coach — Google Digital Workshop

Google program for free digital skills training

October 2018

• HTML/CSS/JavaScript workshops for beginners
• Simplification of web development concepts
• Continuous feedback and personalized support

Creation & Branding, Operations & Supply Chain — Inside LVMH Certificate

June 2025

Exploration of luxury brand strategy, product creation, supply chain and sustainability

2nd Place — Degroof Petercam Hackathon

December 2018

Project: Mobile application connecting experts (accounting, HR, finance, IT) with missions/projects

Role: UI/UX design, task distribution, front-end development