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Building software
that actually ships.

I design and build the systems behind the products you actually ship. Twenty years deep in the stack, from React and TypeScript on top to Go services and AWS infrastructure underneath — usually with a team somewhere in the middle that I'm also leading.

Get in touch See work

02 By the numbers

Career · cumulative
01
20+
years shipping software
02
50+
production web apps delivered
03
$360k
annual AWS cost saved at Eyeball
04
10
person engineering team led
05
12+
years with React.js
06
millions
of monthly users served

03 Selected clients

9 engagements
Expresta
01
PHP, Nette, RabbitMQ
Eyeball
02
React.js, Go, PHP, Symfony, Python, AWS
GotCourts
03
React.js, Go, PHP, Symfony
Billdu
04
React.js, PHP, Nette, Go, Docker, AWS, RabbitMQ, MySql, MongoDb
Merck
05
React.js, Docker
Commander
06
React.js, Google Maps API
Digitask
07
PHP, Nette, RabbitMQ, MongoDb
Traveldata
08
PHP, Nette, MySql
Hammerfields
09
Astro, React.js

04 Work history

9 roles · 2010 → present
Dec 2021 ↓ Present Remote

Deputy CTO & Architect

at Eyeball ● current

Saved approx. $360k/year in AWS costs by designing and building a custom Python video-processing pipeline

  • Grew and led a 10-person in-house product engineering team across backend, frontend, design, and QA, transitioning delivery from outsourced development to internal ownership
  • Owned end-to-end platform architecture, technical delivery, and engineering standards across the product stack
  • Rearchitected a Symfony monolith into a decoupled React client and PHP API, improving maintainability and delivery speed
  • Designed and built AWS-based CI/CD from scratch, enabling per-branch testing and independent deployments for the mobile API and web applications
AWS, Docker, PHP/Symfony, Node.js/Bun, Python, React, TypeScript, MySQL
Nov 2013 ↓ Jun 2018

Deputy CTO & Architect

at Billdu Ltd.

Scaled an invoicing SaaS platform to tens of thousands of paying customers across 30+ countries

  • Owned web application and API architecture supporting hundreds of thousands of monthly invoices
  • Modernized the platform by rearchitecting the core PHP/Nette/Symfony application and API
  • Expanded product and operational capabilities by delivering platform services for logs, newsletters, mail, push notifications, and CI/CD
  • Led architecture, technical delivery, and hands-on implementation as Deputy CTO
AWS, Docker, PHP/Nette, Symfony, Go, React, RabbitMQ, MySQL, MongoDB
2020 ↓ Present Bratislava

Co-founder, Web & Backend

at UlozDoklad ● current

Shipped a live receipt-tracking SaaS for QR-code cash receipt scanning and expense tracking

  • Delivered the product end-to-end as a self-funded co-founder alongside full-time engineering roles
  • Built and maintained frontend, backend, cloud deployment, and CI/CD solo
React, Redux Toolkit, Next.js, Go, GCP, Bitbucket Pipelines, GitHub Actions
Apr 2021 ↓ Dec 2021 Remote

Team leader

at Allied Irish Banks

Delivered bank-employee mortgage calculator on schedule with zero launch defects

  • Improved maintainability and review velocity by introducing TypeScript and modern code-quality tooling
  • Led a 6-person React team through delivery, architecture decisions, and engineering standards
React, Redux, Formik, TypeScript, Node.js
Jun 2020 ↓ Apr 2021 Remote

Team leader

at Carvago/TEAS

Shipped the car-service side of the new TEAS DMS by leading a 3-person React team

  • Accelerated other Carvago teams by designing and shipping an adopted shared platform library
  • Drove architectural decisions across the workstream and enabled broader application delivery
Next.js, React, Redux Toolkit, Saga, Node.js
Jun 2018 ↓ May 2020 Bratislava

React.js developer/architect

at GotCourts Ltd.

Rebuilt the player-facing web app from scratch on a modern React architecture

  • Supported tens of thousands of players booking courts by replacing the legacy frontend
React, Redux, RxJS, Node.js, WebSockets, AWS Lambda, Go, Docker
Oct 2013 ↓ Present Remote / Bratislava

Selected Consulting & Product Delivery

at BAZIK / Traveldata / Commander / Side Projects ● current

Delivered selected client platforms and APIs end-to-end through independent consultancy

  • Unblocked Traveldata CMS delivery and shipped Commander fleet route-planning capability
  • Built multiple side projects end-to-end, including realtime social products and a golf-school information system
React, Go, Node.js, PHP/Nette, WebSockets, MySQL, MongoDB
Oct 2012 ↓ Apr 2013 Bratislava

Lead Developer/Architect

at Fatchilli.com

Shipped rtvs.sk CMS and public website for Slovakia's national broadcaster

  • Implemented video archive and online-streaming restrictions for rights, geo, and licensing windows
  • Built Node.js + ZeroMQ streaming control plane for live and on-demand broadcaster video infrastructure
  • Led architecture and delivery as Tech Lead and Team Lead for a 7-person team
PHP/Nette, Node.js, MySQL, ZeroMQ, JavaScript
Apr 2010 ↓ Nov 2012 Bratislava / Aalborg

Earlier Technical Leadership Roles

at digita.sk / Expresta

Shipped Jobzine.sk, a social network combining Facebook, Twitter, LinkedIn, and Flipboard concepts

  • Delivered realtime social and intranet systems with RabbitMQ pub/sub and long-polling before WebSocket adoption
  • Built aggregated activity feed, notifications, chat, and Expresta IVR with live caller-context screen-pop for agents
  • Led technical direction and teams up to 5 across social and intranet platforms
PHP/Nette, MySQL, MongoDB, RabbitMQ, JavaScript

05 Stack

6 categories · battle-tested
Languages 05
TypeScriptGoPythonPHPSwift
Frontend 08
React.jsReact NativeExpoNext.jsAstroVite jsTailwindZustand
Backend 08
Node.jsBunFastifytRPCSymfonyDoctrineSwagger.NET
Data 05
MySQLMongoDBRedisElasticSearchDynamoDB
DevOps & Cloud 10
DockerAnsibleRabbitMQApache KafkaTraefikAWSAzureGoogle CloudFirebaseGit
Tools 05
StorybookPlaywrightFigmaVisual Studio CodePhpStorm

06 Open source

Pinned · github.com/bazo
react-tic-tac-toe

Tic Tac Toe implementation in React + TypeScript — small reference project.

TypeScript · React
requestbin 3

Self-hosted requestbin for inspecting incoming HTTP requests in real time. Go backend, React UI.

Go · React
maildebug

Self-hosted SMTP catcher with a web UI for debugging outgoing email in development — drop-in replacement for MailHog/Mailtrap. Go backend, TypeScript UI, Docker-ready.

Go · TypeScript

07 Education

3 institutions
2010 – 2012
Aalborg University, Humanistic Informatics
Human-computer interaction studies. Designed a publishing system for field journalists, developed alongside my Expresta engineering role.
2005 – 2010
Master, Comenius University, Faculty of Management
Bachelor's in General Management; Master's in Information Systems Management.
2009 – 2009
University West Trollhättan
Erasmus exchange semester — coursework in management, human-computer interaction, and data warehousing.

Got something interesting to build?

Fractional CTO, architecture review, or hands-on engineering — happy to chat.

[email protected] Connect on LinkedIn