Mateusz Worotyński
Senior Software Engineer / Technical Lead
Profile
10+ years designing and implementing scalable SaaS systems, including a platform processing 1.5+ billion daily events. I am looking for a technical role where I can stay hands-on, support architectural decisions, and deliver reliable backend, data, or full-stack solutions. Strongest areas: Node.js, TypeScript, Go, distributed systems, data pipelines, and cloud infrastructure.
Experience
PushPushGo Sp. z o.o.
2016 – present
Co-Founder / IT Architect
SaaS platform for Web Push & Mobile Push
- Designed and evolved system architecture handling 1.5+ billion daily events (HA, distributed system)
- Built data warehouse and analytics pipelines: BigQuery + Airflow (Python) + MongoDB + DuckDB + GCS/S3
- Implemented CI/CD with GitHub Actions, Terraform & Terragrunt in a trunk-based development model
- Collaborated with DevOps on HA infrastructure: Nomad, Consul, Vault
- Backend and full-stack development: Node.js, TypeScript, Deno, Go, Next.js, React, RabbitMQ, MongoDB, Redis
- SDK development: Vanilla JS (web), Kotlin (Android), Swift (iOS), Dart (Flutter)
- Self-service analytics for business teams: Looker Studio, Metabase
- Security audits and Bug Bounty program management
FreshMail Sp. z o.o.
Jun – Oct 2015
Software Developer
SaaS email marketing platform
- Maintained and developed the platform (PHP, MySQL, Redis)
- Improved frontend features (Backbone.js, JavaScript)
- Worked in Scrum, closely collaborated with customer service team
Alior Bank S.A. / Alior Raty Sp. z o.o.
Jun 2013 – May 2015
Consumer Finance Systems Implementation Specialist
Alior Raty consumer loan system
- Partner integrations via XML/SOAP
- Designed and configured business processes (BPM)
- Built a temporary CRM system (PHP + PostgreSQL) for a new sales team
- QA: Selenium tests and manual testing
- Supported VoIP implementation (AlfaVox)
Alior Bank S.A.
Dec 2010 – Jun 2013
HelpDesk Specialist → Customer Service Consultant
Bank branch support and individual customer service
- Supported bank branches via phone, Jira, and email
- Designed and deployed internal knowledge base on xWiki
- Built a call center break-slot management system (PHP + MySQL)
Education
University of Warsaw
2018 – 2019
FinTech — Postgraduate Studies
Co-organized by BNP Paribas, Alior Bank, KNF, and PwC. Regulation, technology, and financial innovation ecosystem.
WSZiB in Cracow
2008 – 2012
Finance & Accounting (Banking) — BA
Thesis: "Covered Bonds as a Source of Funding for Mortgage Banks in Poland"