(Software & Cloud Architect)
Multi-tenant SaaSAWSAI-driven engineering
I design multi-tenant SaaS platforms and build the AWS infrastructure they run on myself. 20+ years in technology: from networks to SaaS, and now AI agent systems that write and review production code.
since May 2026Live
Co-founder
AI-first solutions for businesses. We help companies use artificial intelligence where it pays off: in the visibility of their answers (AEO), in how they talk to their customers, and in custom solutions built around their own needs.
Visit praion.grsince February 2026Live
Co-founder & Chief Architect
A SaaS platform for marketing and communication with AI, made of three applications:
I own the architecture and lead the team technically. I built Content Studio myself, along with the billing system for AI usage, the Autopilot for autonomous replies and the architecture of the WordPress plugin. I connected several AI providers — Claude, Gemini, OpenAI — and generative media services: Imagen, Veo, Runway. I led the security review, with automated access-control checks in CI.
Visit praion.grNicosia · since 2019Live
Founder & CEO
My own company. We build websites, online shops and platforms on our own headless CMS, and we also take care of the infrastructure they run on. I work directly with founders and executives: from the first conversation about what they need to a site that is running and maintained.
Visit iwebforyou.com2020 — 2026No name and no link, on purpose
Software Architect / Chief Technology Architect
A SaaS platform in America for quality and compliance in healthcare. It is multi-tenant, with a separate database for each customer, and has modules for analytics, standards, policy management and inventory.
I was its architect, with the final say on every technical decision. Six years, in production.
I designed, built and operated the AWS infrastructure on my own.
Next.js
In-house product
The CMS under every website and online shop we deliver. It covers online shops, bookings and multilingual content; SEO and AEO; GDPR compliance; payments through Stripe, PayPal and Viva; and product feeds for Skroutz, BestPrice, Shopflix and Google Merchant.
A new site is generated automatically from the base, and upgrades reach every running site in a controlled way, not by hand one site at a time. We keep adding features, and each one becomes available to every site.
I designed it. A developer on my team builds it.
Claude Code
In-house tools · in production
Planner takes a specification and delivers a working application. On its own it goes through architecture, implementation with tests written before the code, quality checks, an audit and deployment. It saves its state at every step, so if it stops it resumes where it left off. One project runs on one machine at a time, with a lock and with memory and load limits so tasks never collide. The owner gives feedback in rounds: they write what they want, the system applies it and shows the result again. Human approval is needed only at deployment.
Agent Studio is a set of specialised agents on Claude Code that run in parallel: code review, security audit, pentest, QA exploration, UX and SEO/AEO. Each one looks at its own area and writes up its findings.
What keeps them useful is not the model. It is the mechanisms. Completion criteria that leave no room for interpretation. Every finding checked against the current code before it is accepted. A final check that is never delivered red. Automatic rollback if a deployment fails. And every question answered once becomes a rule, so it is not proposed again.
Both are used in production, including for the security review of Praion AI
From a blank page to production: how data is split per customer, where one service ends and the next begins, what becomes a queue and what becomes an API. I make the technical decisions and stay responsible for whether they hold.
Designing, building and running production infrastructure. Network, databases, secrets, backups, logging, threat detection, identities. And the daily watch over all of it.
AI agent systems that write and review code — with completion criteria, verification of every finding before it is accepted, and automatic rollback when something fails.
From an idea to a working product: technical strategy, team, implementation, delivery and operation. Working directly with founders and executives.
(ABOUT ME)
I started as an electronic and network engineer: Intracom first, then ANCO, with a CCNA and a CCNP. In 2009 I founded Entermac and ran it for ten years — projects inside complex client environments, contracts in regulated sectors and critical infrastructure, and the job of keeping systems working year after year.
Since 2019 I have run my own company, iwebforyou, and it is still going. Since May 2026 I have also been a co-founder of Praion. Alongside, I spent six years as architect of a healthcare platform in America.
When I design a platform I do not stop at the diagram. I go down to the network, the database, the backups and who has access to what. A system is judged in production.
Konstantinos Chaitas · Software & Cloud Architect
17 services in one production infrastructure that I designed and built alone.
The backend of the platforms: REST APIs, queues, WebSockets.
The frontend, and the headless CMS behind every site we deliver.
The data model, and the separation of customers in multi-tenant SaaS.
The base of Agent Studio and Planner.
Automated access-control checks in CI.
(NUMBERS)
(AWS)
For the healthcare platform in America, the production AWS infrastructure was my work from start to finish: I designed it, I built it and I ran it, with no infrastructure team behind me.
On top of AWS WAF I wrote my own serverless system with Lambda, EventBridge and DynamoDB. It does not rely on lists of known-bad addresses. It spots malicious scanners by how they behave and blocks them automatically.
Ten years running my own technology company: projects inside complex client environments, contracts in regulated sectors and critical infrastructure, and responsibility for long-term operation.
The visitor builds a quote for a website, platform or cloud project alone, pays, and then follows the project in a client area of their own. The same app works for every company.
Text, images and video for a business’s posts, from the models that do each job best, in one place. Nothing is scheduled without your approval.
The model is not the guarantee. The guarantee is three things: completion criteria that leave no room for interpretation, verification of every finding before it is accepted, and automatic rollback when a deployment fails. What I learned building Planner.
A healthcare platform where every customer had its own database. The isolation you gain is real. You pay for it in migrations, in backups, and in the first analytics query that has to read from a hundred databases.
Lists of known-bad addresses are always a day behind. How I built, on top of AWS WAF, a serverless system with Lambda, EventBridge and DynamoDB that recognises the pattern of a scanner and shuts it out by itself.
More and more people get their information without opening a page. What AEO is, and what I built into the system behind my sites so that every page gets quoted.
(HOBBY · MOUNTAINEERING)
When I am not designing systems, I am climbing. Olympus, Kaimaktsalan, Vovousa to Valia Calda: on foot, over the last few years.
Mountaineering is closer to my work than it looks. You check the weather before you set out. You plan the route around what you can handle, not what you wish you could handle. You pack what you will need if something goes wrong. And you turn back when the data says so, not when stubbornness does.
Up there the phone has no signal. It is the one place where no system needs me.
If you have a platform to design, an infrastructure that has to hold, or a team that needs technical direction — write to me.
Greece — remote, across Europe and the US
VIDEO CALL
Pick a free time from my calendar. You will get a Microsoft Teams meeting invitation by email.