# Michał Tajchert
**Chief Technology Officer** · Warsaw, PL · [@tajchert](https://github.com/tajchert)

CTO and engineering leader with 15+ years across consumer mobile, platform, q-commerce, eCommerce, fintech, banking, and startup product work. Strongest where product ambition, architecture, data, and team design need to move together.

## Leadership Profile

I build high-agency product engineering teams that can ship reliably without losing technical depth. I lead through clear ownership, strong technical judgment, and enough hands-on engineering context to keep decisions grounded.

## Selected Scope

- CTO scope: software, design, and data for Żabka Jush and Delio.
- Managed through Team Leaders and Tech Leaders, including 4 teams with ~25 mobile developers at MODIVO.
- Mobile products across 19 markets, with Backend-For-Frontend responsibility and close product, business, marketing, and design collaboration.
- Built mobile capability from 2 to 25+ developers at DXC, including client-facing technical leadership and pre-sales.
- Led remote and distributed teams across Poland, Ukraine, and Austria.
- Shipped or led products with 200k+ active users, 5M+ banking reach, and 100k-user launch spikes.

## Experience

### Chief Technology Officer — Lite e-Commerce · Feb 2025 — present · Warsaw
Leading software, design, and data for Żabka Jush and Delio. Responsible for engineering direction, product delivery, team design, and building systems that can keep shipping under real operational pressure.

### Engineering Manager — MODIVO SA · May 2022 — Dec 2024
Managed mobile-related teams in a fast-growing eCommerce group. Responsible for MODIVO and eObuwie apps across 19 markets, the Backend-For-Frontend layer supporting them, and cooperation with product, business, and platform teams.

- Coordinated 4 teams with ~25 mobile developers.
- Managed through Team Leaders and Tech Leaders, keeping ownership close to the teams.
- Worked closely with product, business, marketing, design, and platform teams.
- Helped move mobile development from outsourcing toward in-house delivery.

### Mobile Technology Leader — MODIVO SA · Nov 2021 — May 2022
Set mobile engineering direction during a fast-growth phase. Focused on architecture, team practices, delivery standards, and scaling mobile development across brands.

### Mobile Technology Leader — BlueSoft · Oct 2020 — Oct 2021 · Warsaw
Led mobile technology and the Android team for Raiffeisen Ukraine. Also supported other mobile initiatives inside BlueSoft, helping teams choose architecture, tooling, and delivery practices.

- Worked with 4 feature teams and ~14 senior developers.
- Led distributed remote work across Poland, Ukraine, and Austria.
- Used Jetpack Compose, SwiftUI, shared modules, and design-system work.

### Technology Business Development Manager — DXC Technology · Feb 2019 — Sep 2020 · Warsaw
Worked across technology ownership, software management, architecture, and client-facing business development.

- Technology Product Owner / Software Manager / Architect for eDirham G3 in the United Arab Emirates, based on BLIK/OTP flows.
- Supported IKO modularization for a 5M+ client banking app.
- Worked directly with clients in technical discovery, delivery steering, and pre-sales.
- Helped build mobile capability from 2 to 25+ developers.

### Android Team Lead @ Raiffeisen — BlueSoft · Jul 2017 — Jan 2019 · Warsaw
Led a six-person Android team building a new banking application on a modern mobile stack. Supported the previous Mobilny Portfel app while preparing the new version and coordinating the merge path with the BNP mobile team.

- Delivered the new banking app in 7 months.
- Introduced Kotlin, DI, and multi-module architecture in banking.

### Startups — Brand24, Yawn, Icelytics, 12Hours · Jun 2015 — Jun 2017 · Warsaw / Toronto
Built and led early-stage product work across mobile apps, analytics, and consumer products.

- **Brand24** — Team lead and Android developer for a new Brand24 mobile app built from scratch.
- **Yawn** — CEO; built the team, managed delivery, shaped product ideas, and selected the technology stack.
- **Icelytics** — CEO; built a mobile analytics product focused on network performance, cache behavior, and cost optimization.
- **12Hours.io** — CEO; led early product and technical direction.

### Software Engineer — Polidea · Jul 2014 — Apr 2015 · Warsaw
Professional software engineering in a mobile-focused software house, building Android products for clients. Started regular public speaking and Android education work during this period.

### Android Developer — BrandCare · Jul 2013 — Oct 2013 · Warsaw
Early commercial Android development work, including Banamo, a privacy-focused safer community app.

## Education

### SGH Warsaw School of Economics — Master's degree, E-Business · 2015 — 2019
- Toronto Metropolitan University, Canada · Feb 2017 — Jul 2017
- Full scholarship at The DMZ startup accelerator.

### Polish-Japanese Academy of Information Technology — Bachelor of Engineering, Computer Science (Mobile Devices) · 2011 — 2015

## Focus Areas

Engineering leadership · Team design · Mobile platforms · Android · Kotlin · eCommerce · Fintech · Banking · Backend-For-Frontend · Software architecture · Product delivery · AI-assisted engineering · LLMs

## Selected Open Source

- **WaitingDots** — Android loading-animation library built around bouncing dots. Kotlin · Android · MIT · 700+ GitHub stars.
- **Nammu** — Android runtime-permission helper for permission checks, callbacks, and monitoring. Kotlin · Android · MIT · 700+ GitHub stars.
- **BusWear** — EventBus support for Android Wear and mobile apps. Java · Android Wear · Apache-2.0.
- **ExceptionWear** — Android Wear exception-handling library.
- **RuntimePermissionWorkshop** — Practical workshop material for Android runtime permissions.

## Selected Products & Community

- **Kanarek.app** — Air-quality monitoring app with 200k+ active users and 4.8/5 rating.
- **12Hours** — Calendar-as-analog-clock Android widget; 100k users in three days after Reddit traction.
- **SGH Daily** — University app with timetable, news, and cancelled-class alerts; 10k+ users.
- **Warsaw Hacks** — 1st prize for a civic identity-verification concept using one-time codes.
- **GDG Warszawa** — Organizer and public speaker, 2013–2019, including 25+ Android talks in 2015.
- **Google Launchpad Week** — Startup mentor for mobile and technical direction.

## Connect

- LinkedIn: https://www.linkedin.com/in/micha%C5%82-tajchert-517b7668/
- X: https://x.com/Tajchert
- GitHub: https://github.com/tajchert
- GitLab: https://gitlab.com/mtajchert