John Kalpouzos  -  ByteBerry
Founder @ ByteBerry • Lead Software Engineer

Building modern web platforms
with clean architecture.

I am John Kalpouzos. I ship scalable products with Symfony/Laravel & Docker, and high-performance WordPress/WooCommerce solutions for businesses.

View Projects Work with me
Company
Byteberry - Digital Solutions
Focus
Web Platforms • E-commerce • APIs
Location
Greece (remote-friendly)
John Kalpouzos
John Kalpouzos
Founder @ ByteBerry • Lead Software Engineer
Symfony Laravel Spring Boot Docker MySQL PostgreSQL Redis WordPress
LinkedIn ByteBerry Email
What I do
Product-minded engineering & delivery

From architecture to implementation to deployment to monitoring.

Fast outcomes
Clean, maintainable, scalable

Speed without tech debt.

Engagement
Build • Fix • Improve

New builds, migrations, performance + SEO.

Availability
Projects & retainers

Let us scope it and ship.

Work

Recent roles and the kind of impact I focus on.

ByteBerry - Founder
2025 -> now
  • WordPress/WooCommerce builds, performance, SEO, and custom integrations.
  • Custom apps with Symfony/Laravel for business workflows and automation.
Lead Software Engineer @Wedata Services
2024 -> today
  • Symfony/Laravel services, Dockerized deployments, scalable architecture.
  • Focus on reliability, observability, and predictable delivery.

Projects

Selected Wedata delivery for DEI digital energy products.

myEnergyCoach (Greece)
Web Platform

Digital energy advisor delivered with Wedata for DEI in Greece.

SymfonyAPIDEI
Open site
myEnergyCoach SME
Business

Dedicated DEI myEnergyCoach experience for SME customer profiles.

SymfonyAPISME
Open site
heatpumps.dei.gr
Campaign Site

DEI heat pump funnel and conversion-focused landing experience.

Landing PageDEIEnergy
Open site
myenergyupgrade.dei.gr
Upgrade Program

DEI digital entry point for energy upgrade journeys and lead capture.

UpgradeDEICampaign
Open site
myEnergyCoach (Romania)
Regional Rollout

Romanian-market localization and rollout of the myEnergyCoach platform.

RomaniaLocalizationRollout
Open site
myEnergyCoach Offline (Greece & Romania Stores)
Offline Experience

Offline/in-store version for Greece and Romania stores to support assisted customer flows.

OfflineIn-storeKiosk
Available on request
DEI x IKEA Contest
Limited-Time Campaign

Contest page built for a limited period campaign on contest.dei.gr.

ContestDEI x IKEACampaign
Open site
Personal Work Portfolio
ByteBerry

Explore my personal/commercial work showcase on ByteBerry.

PortfolioCase StudiesByteBerry
View work

Stack

Tools I am comfortable shipping with.

Backend
Symfony Laravel Spring Boot PHP 8+ JAVA
Infra
Docker Nginx Linux
Data
MySQL Postgres SQL Redis Queues
Web
WordPress WooCommerce SEO

Contact

Send a message - it goes to info@byteberry.gr.

Direct

Email is the fastest way. Include a short scope + deadline.

info@byteberry.gr LinkedIn