Nikolas Trentin
Software Engineer
System Architecture · AI · Scalable Solutions
I build systems that truly work.
I develop and modernize complex systems, optimize performance, work with data, and integrate external services. I bring a product-oriented mindset with strong focus on scalability and long-term sustainability.
Professional journey
Experience
Senior Software Engineer
Infina System
Aug 2021 – Present · 4 yrs 11 mos · Brno, Czech Republic · Hybrid
As part of the long-term development of a complex business system, I contributed to architecture design, legacy modernization, and the delivery of key features across frontend, backend, and integrations. My role combined hands-on engineering with strong technical ownership, including strategic decision-making and continuous improvement of engineering practices.
System Development & Modernization
- Working with a large legacy codebase and driving gradual modernization (jQuery → Vue migration)
- Introducing modern technologies into an existing stack
- Designing and optimizing database structure and data models
- Significant SQL query optimization and overall system performance improvements
Backend, Integrations & Automation
- Backend development in PHP (Nette), Python, and Go (microservices)
- Designing reliable integrations with external systems (banking APIs / PSD2, SAP, Google services, etc.)
- Implementing asynchronous processing (queues, email delivery, background jobs)
- Building scalable solutions with a strong focus on stability and long-term maintainability
AI & Data
- Development of AI-powered features and integration with LLM APIs
- Building analytics and statistics modules and working with data-driven functionality
- Designing solutions for advanced calculations and data processing
Technical Leadership & Engineering Practices
- Active participation in technical and architectural decision-making
- Ownership of key system components and long-term product evolution
- Working within Git workflows and the Atlassian stack (Jira, Confluence)
- Standardizing engineering processes and implementing CI/CD practices
Full Stack Developer
VAE CONTROLS
Aug 2021 – Sep 2022 · 1 yr 2 mos · Ostrava, Czech Republic · On-site
Full-stack development of a web and VR application within a team of developers, focusing on a modern frontend and a high-performance backend in Go.
Backend (Go)
- Development of REST APIs and business logic in Go
- Designing and optimizing application architecture
- Implementation of validation and authentication mechanisms
- Working with databases and designing efficient data structures
Frontend (Vue.js & VR)
- Development of user interfaces in Vue.js
- Creating interactive 3D/VR scenes using A-Frame
- Integrating the frontend with backend APIs
- Optimizing UX and overall application performance
- Collaboration on UI/UX design solutions
Freelance Full Stack Developer
Self-employed
Jan 2018 – Aug 2021 · 3 yrs 8 mos · Remote
End-to-end delivery of corporate websites, e-commerce solutions, and technical optimization projects. Independent project ownership with direct client communication.
Key Areas of Work
- Development of corporate websites, e-commerce solutions, and presentation projects
- Maintenance, improvement, and technical optimization of WordPress-based websites
- Integration with supplier APIs and third-party services
Delivered Solutions
- Vehicle management system integrated with automotive listing portals
- Legal information system for case and agenda management
- Workforce shift and attendance tracking system
Academic background
Education
Master's degree
Information Technology
VSB – Technical University of Ostrava
2020 – 2022
Bachelor's degree
Information and Communication Technology
VSB – Technical University of Ostrava
2017 – 2020
Technologies & expertise
Skills
Backend & Languages
Frontend
Databases & Infrastructure
AI & Data
Tools & Practices
Process & Leadership
Selected work
Projects
Solar Panel Calculator
Advanced solar panel calculator integrating EU APIs for sunlight prediction based on GPS location. Yearly output estimates by panel orientation and tilt, ROI calculations, and CO₂ savings projections.
Canteen Management System
End-to-end meal-service management system — tablet-based serving terminals, personalized card printing, Bluetooth QR code scanning. Credit system connected to ComGate and GoPay payment gateways with real-time sync.
CRM System
Full CRM system designed and built from the data model up to the UI. Modules for client management, sales pipeline with visualization, meeting scheduling with calendar integration, task delegation, and real-time notifications.
Attendance ERP (Píchačky)
Comprehensive time & attendance ERP — originally a native Android app, later rewritten as an offline-first PWA. GPS location verification, hour tallying, sick-day and vacation management, detailed work-log, and Firebase push notifications.
Google Calendar Sync Engine
Bidirectional sync system linking internal events, tasks, and meetings with Google Calendar via the Calendar API. Watch channels for real-time change detection, conflict resolution, and periodic full-sync runs.
DMS — Document Management
Full Document Management System from architecture to deployment. Document versioning with change history, archival with retention policies, fine-grained ACL permissions, folder-tree structure with permission inheritance, and full-text search.
PSD2 Banking Integration
Integration system for automated bank statement retrieval and transaction matching via PSD2 APIs. Multi-bank support, periodic statement pulls, invoice/order matching, and discrepancy alerting.
Digital Signatures
Deployment and customization of DocuSign for corporate signing workflows + custom-built signature system for safety-at-work and contractual documentation. Wacom digitizer and tablet support via the Wacom Web API.
Integration & Webhook Hub
Central integration hub connecting internal services with external systems. Universal webhook engine with retry logic, dead-letter queues, delivery monitoring, and payload schema versioning.
Analytics & BI Modules
Suite of analytics modules for large-scale datasets — real-time interactive dashboards and charts, configurable reports, comparative analysis across periods, and bulk CSV/Excel/PDF exports.
Dynamic Table Engine
Custom dynamic table system letting end users define entity schemas with no coding. Required fields, validation rules, custom column types, conditional display logic, and bulk exports.
Shipment Tracking
Complete shipment tracking system with full state, action, and item history per shipment. Workflow engine for status transitions, automated notifications, and a live dashboard of active shipments.
Mobile File Uploader
Companion PWA app for external photo and document uploads directly into the central system. Batch upload, client-side image compression and resize, offline queue with retry, and GPS geotagging.
SAP & Enterprise Integrations
Integration interfaces between the internal system and enterprise platforms — SAP, PowerKey, PowerFlow, Advent. Bidirectional master-data sync, entity mapping, and data-flow monitoring with alerting.
Client Projects
vse-pro-vas-dum.cz
Full-featured OpenCart e-shop with automated supplier product feed imports, inventory sync, and Heureka XML price comparison export. Custom template modifications, payment gateway integrations, and performance tuning.
zs-stechovice.cz
Redesign and technical maintenance of a school website on WordPress. Security hardening, CDN setup, cache strategy, and ongoing upkeep with focus on accessibility and responsive design.
petvarols.eu
Corporate website redesign with a custom-built component for a full product catalog. Custom taxonomies, parametric filtering, responsive gallery, and an admin interface for product management.
primeautomotive.cz
Modern serverless website built with Astro and Tailwind CSS with full multi-language support. Deployed on edge infrastructure, focused on Core Web Vitals and optimized asset loading.
MotoDB
Vehicle fleet management system with automated listing exports to SAuto and Tipcars. Custom database model with vehicle history, state logic, photo gallery, and bulk data operations.
scribe.trentin.cz
Serverless PWA for audio transcription via OpenAI Whisper API. Mic recording, file drag & drop, and clipboard paste. Offline-first architecture with automatic background sync on reconnection.
smartnabidka.cz
Full-stack Next.js app for creating professional proposal documents. TipTap WYSIWYG editor with custom pricing blocks, template system, and PDF export. Multi-tenant architecture.