Joris Kapeta's Resume

Joris Kapeta

Full-stack engineer & Founder | Bootstrapped to €50k/mo | Now focused on B2B product & UX challenges

Brussels, Belgium, CET

About

Full-stack engineer & founder with a proven track record of shipping real SaaS products and scaling a bootstrapped startup to €50k/month.


I bring a rare mix of technical execution, user understanding, and business insight. Over the past few years, I’ve built full-stack systems for white-label SaaS platforms and customer-facing apps, all used in real-world operations.


Whether I’m building an API, mapping workflows, or improving UX flows, I always start with the same principle: talk to users, understand the problem deeply, then build what matters.


I specialize in back-end systems (Python/Flask, PostgreSQL), but also collaborate closely with UI/UX teams and stakeholders to deliver polished, usable experiences. I’m also comfortable with front-end stacks like MERN and agile product environments.

Work Experience

TaxGer

2025 - Present

Founder & Full-stack Engineer

White-label SaaS for taxi fleets | Built from scratch | In demo & onboarding phase
I built it end-to-end (backend-heavy, frontend, infra) with a focus on:
  • Real-time location tracking & trip management
  • Fleet operations dashboard (multi-role access)
  • Branded apps for operators
  • Single-tenant architecture
  • SaaS
  • White-label
  • B2B
  • Flask
  • Python
  • PostgreSQL
  • Heroku

Family Cabs

2023 - 2025

CTO as service

Leading technical development and architecture for a dynamic school transportation service.
  • Stabilized the platform by significantly reducing technical debt from the legacy codebase.
  • Helped the company take ownership of their backend, with a focus on the mobile app.
  • Digitized the business by developing new features to meet market demands.
  • Remote
  • Flask
  • Python
  • PostgreSQL
  • Heroku
  • AWS
  • APIs

Koalfit

2018 - 2023

Co-founder & CTO

Successfully transitioned from Founder to CTO: Led the growth of Koalfit, an Uber-like platform for children transportation service in Brussels.
  • Played a key role in establishing and growing the business from its start.
  • Streamlined operations to enhance efficiency and effectiveness.
  • Managed rapid scaling and growth while maintaining a pragmatic and efficient approach in a high-stress environment.
  • Brussels
  • Python
  • Strategy
  • Management
  • Problem-solving

Bordet

2017 - 2022

IT Project Manager

Managing the technical aspects of the IT department for radiotherapy, nuclear medicine, and radiology.
  • Developed an application to automate patient reception and registration (over 70/day) in the radiotherapy department.
  • Led an agile project to create a workflow management application for nuclear medicine - 15 patients/day across six departments.
  • On Site
  • Management
  • Troubleshooting
  • Communication
  • Leadership

Bordet

2015 - 2017

Imaging Engineer | IT

Managing the engineering aspects of handling medical imaging equipment and images to improve patient care.
  • Served as the primary point of contact with externals and the IT department to resolve complex issues.
  • Provided technical support for medical studies conducted in the nuclear medicine department.
  • Participated in enhancing medical image usage (PET and MRI) for diagnostics and treatments through image registration.
  • Improved the use of PETScan imaging in radiotherapy by integrating together softwares from 4 different manufacturers: Telemis, GE, Varian, and Siemens.
  • On Site
  • Technical
  • Calibration
  • Networking
  • Optimization

Education

ISIB - Brussels

2010 - 2015
Master's Degree in Nuclear physics

Skills

  • Design Systems
  • Python
  • MERN
  • Node.js
  • AWS
  • SQL
  • Database modeling
  • Restful APIs
  • Git
  • GitLab
  • GitHub
  • CI/CD
  • Agile
  • AI development tools
  • Vector Database
  • Heroku
  • Vercel

Side projects

Wordlogger

A tool that allows users to share word lists via a simple link without using Google Drive, PDFs, or Word documents.

  • TypeScript
  • Next.js
  • Vite
  • Firebase
  • Stripe

Zakatify

A small tool to activate smart notifications for hijri financial obligations.

  • TypeScript
  • Next.js
  • Tailwind CSS
  • Supabase

PlayTest

A tool that connects your builds, your feedback, and your team. Automatically.

  • Coming soon
  • CI/CD
  • Game Engines
  • Three.js
  • GitHub
  • Vercel