Experience
Building products that scale, with a focus on mobile platforms and user impact.
Principal mobile developer
Tellent | Dec 2024 - Present
HR application
Lead conversion of existing React web application into a performant, unified native mobile experience.
Impact: Design and implement mobile architecture; coordinate cross-team collaboration & workflow optimization; lead development of critical platform capabilities; convert existing web applications to native with minimal code changes/resources; architect unified mobile platform integrating multiple web apps into a cohesive experience.
Tech stack: React, Capacitor, Node.js, Elixir
Senior mobile developer
Tellent (formerly Recruitee) | May 2020 - Dec 2024
Companion App for Applicant Tracking System
Mobile app focused on quick, frequent operations on the go. Team: 5 (sub-team) within 40+ engineering org
Impact: Owned mobile & PWA lifecycle (development, deployment, monitoring, infrastructure); tripled user base and increased product awareness/independence; improved cold startup performance by 50%; developed custom native plugins reducing external dependency risk; removed technical debt enabling faster delivery; researched user needs and organized backlog flow.
Tech stack: Angular, Ionic, Capacitor, Android (Kotlin), iOS (Swift), Elixir
React Native and React developer
Monterail (Software house) | Oct 2018 - Apr 2020
Luxury Fashion Browsing App
Fashion browser tailored for luxury fashion retail companies. Team: 4
Impact: Developed and deployed apps; produced rapid prototypes & PoCs validating UX/features; advised stakeholders on technical limitations and performance trade-offs; leveraged latest stack to accelerate iteration speed.
Tech stack: Redux, Expo, React Native, React, Airtable, Firebase technologies, Android (Java), iOS (Objective-C)
Fintech + HR Application
Hybrid application for customer experimental wage-related processes
Impact: Implemented & deployed hybrid app (iOS & Android); shipped supporting website improvements; navigated tight deadlines while maintaining quality; improved customer communication loops; balanced scope with team capacity to meet milestones.
Tech stack: Expo, Ruby on Rails, Postgres, Android (Java), iOS (Objective-C)
Multiplatform Business Communication App
Business communication across smartphones & PCs. Team: 6, Scrum
Impact: Implemented multi-platform communication client (mobile & web) using early-stage libraries; engineered shared components minimizing platform divergence; deployed and maintained apps across targets; overcame tooling immaturity
Tech stack: React Native for Web, NodeJS, Postgres, GraphQL, Android (Java), iOS (Objective-C)
Parking App for Shopping Malls
Seamless, ticketless parking experience for shopping mall visitors. Team: 4, Kanban
Impact: Developed web & mobile ticketless parking solution; reconstructed missing documentation; collaborated with cross-continental stakeholders on roadmap; delivered core feature set within very limited budget while maintaining usability.
Tech stack: Redux, React Native, React, NodeJS, MongoDB, GitHub, Git, Android (Java), iOS (Objective-C)
Mobile Game - Charity Encouragement
Simple game promoting charitable contributions. Team: 3, Waterfall
Impact: Consulted & mentored team on React Native and store compliance; mitigated framework constraints to reach acceptable performance; pushed React Native to its limits for game interactions.
Tech stack: React Native, Android (Java), iOS (Objective-C)
IoT and Android developer (R&D Specialist on Grant Project)
Wrocław University of Science and Technology | May 2017 - Nov 2018
Heat Detection in Cows
Project aimed at improving cow health and milk production by gathering and analyzing data from cow collars. Team: 6 (incl. 4 lecturers)
Impact: Conducted hardware testing & Android development for BLE livestock collars; deployed and programmed devices; built auxiliary data-gathering software; mediated between research requirements and hardware constraints; resolved connectivity issues in metal barns; implemented algorithms and produced comprehensive research documentation.
Tech stack: Android (Java), Bluetooth 4.2/5, R, Python, C++, BLE scanning libraries, nRF51/52 dev kit, Redmine
Mobile developer (Android & iOS)
Human Device (Software house) | Aug 2014 - Sep 2017
Multi-domain mobile solutions
Delivered Android & iOS applications across logistics (fleet & cargo), on-demand food delivery, renewable energy device management, and offline retail inventory. Transitioned from Android focus into full bi-platform ownership, including CI/CD and mentoring.
Impact: Owned end-to-end mobile delivery (architecture, features, releases); integrated peripherals (barcode scanners, printers); maintained CI/CD; mentored and onboarded developers; implemented accessibility improvements; built custom ORM & caching layer for offline search & faster iteration; coordinated cross-platform feature parity; delivered renewable energy management suite; established reliable peripheral & offline communication workflows.
Tech stack: Android (Java/Kotlin), iOS (Swift), Google Maps API, Retrofit, Alamofire, BLE / peripheral comms, Java EE, Spring, PHP, Git/Subversion, CI/CD tooling