Customer portal and SRM product where I'm collaborating as architect and technical consultant. It enables companies to effectively communicate and exchange documents with their suppliers. Developed as SPA, it can connect and get data from SAP ERP and store documents to ECM, specifically OpenText Content Server.

Its modular basis and group-based permissions enable users to set product to their needs. Modules include: inquiry and offer system, orders, delivery notes, invoices, supplier registration, qualification and classification, ...

Time tracking web solution that was developed for internal use, where employees enter time spent on projects or support tickets. Automatically generated reports enable analysis of time spent per client for support vs. time spent for new products or time spent on outsourcing projects that do not have in-company project management.

Backend service that is acting as SAP Archive Link (REST) server on one side and stores document to different ECM servers on other side - used as intermediary for content management solutions that do not provide SAP integration by default. It has to deal with different authentication options and integration endpoints, including SOAP and REST. It is developed as high concurrency, fast and stable service as important company processes rely on it, so writing it in Go turned out to be a great choice.

SPA style page developed in SAP OpenUI5 JavaScript framework that serves as alternative interface for SAP financial processes and documents. It can be deployed standalone or as feature rich Fiori launchpad application. It is completely dynamic - SAP sends all the configuration options and data as REST API responses. This way it's mostly used as SAP web framework and as such enables SAP programmers to easily develop web interfaces that are accessible from anywhere, including mobile devices, without having to install special clients.

Software design and development of the product was mostly done by me, which gave me oportunity to learn about SAP UI5 framework and Fiori application development.

Solution used by large companies as integration and document exchange between different systems. It is mostly used for invoices, transfering them from 3rd party interexchanges and email systems, through OCR and into ERP or ECM systems. This standard program can be easily tailored to clients' needs with lots of configuration options and built in scripting language as well as used to identify problems and bottlenecks with different systems.

I made initial architecture and design, based on previous custom tailored solutions and client requests, and also programmed lots of it. It was built as windows service and web frontend, with high concurrency, easy extensions and integrations in mind, also accounting for faster and more reliable processing of large amounts of documents. One challenge was making it reliable and stable, regardless of 3rd party service instabilities. It is used in more than 10 large companies, processing around 5000 documents/invoices per day.

Main POS program with same codebase for different operating systems - running on Windows, Linux, Android and iOS.

One of main challenges and my responsibilities were writing online software updates that are done in background, online and offline secure storage and sync with backoffice for reporting and backup, connecting and low level printing on different thermal printers using JavaScript technology, integration of mobile wallet/payment system Moneta/VALÚ, and developing a system for multiple POS clients to discover each other and to sync their data on local networks.

Bigger project as part of this software was loyalty and prepaid card system, using NFC cards and communication with NFC readers.

With new version we ran, made online updates to and constantly sync more than 1000 POS clients at once.

POS software online backoffice with inventory management, list of invoices issued, access management and business reports. My work included optimizing queries, security and rendering of large data tables, writing advanced graphical interface based on canvas for restaurant or bar floor drawing so users have overview of tables in use.

We also developed light mobile client so customers have constant updates how their business is doing and are able to make changes on the move.

I designed, developed and documented secure REST API which is able to communicate with either backoffice or POS clients and is needed for connecting with 3rd party software, mostly e-commerce sites. This enables customers to have invoices issued with single system.