Maciej Winnicki

I'm a software engineer & engineering manager: 14 years of building software (TypeScript, Go, AWS, React, distributed systems) and 6 years of leading teams across the US and Europe.

These days I'm mostly into AI/ML. At RTB House I own engineering and product for the Context Intelligence Platform, with two teams applying AI/ML to hundreds of millions of documents a day. I also lead the AI Engineering Lab, building internal AI tools that make everyone faster. The work spans training small models and running state-of-the-art LLMs at scale.

I live in Poznań, Poland. My name is pronounced “much-yay”.

Work

RTB House — Senior Engineering Manager
Context Intelligence Platform and the AI Engineering Lab.
2025–now
Vendr — Director of Engineering
From Engineering Manager to Director. Workflows, Marketplace, Seller Portal.
2022–2025
Cloudash — Founder (side project)
A two-person business monitoring serverless apps on AWS.
2020–2024
Stedi — Engineering Manager
Built Mappings, Functions and Schemas for the EDI platform.
2020–2022
OLX Group — Engineering Manager
A “Tinder for Jobs” product built on an ML recommendation engine.
2019–2020
Serverless, Inc. — Principal Software Engineer
Led Event Gateway, an open-source router that sends events from any cloud to serverless functions.
2016–2018
Riot Games — Software Engineer
Microservice infrastructure on AWS ECS, services in Go and Node.js.
2015–2016
Egnyte — Senior JavaScript Developer
Refactored the Backbone.js single-page app so it could scale with a much bigger product and codebase.
2014–2015
Allegro — Solutions Architect
From Software Developer to Solutions Architect on Eastern Europe's largest e-commerce platform.
2011–2014

Work

Writing