Designed system architecture and developed several free services and two commercial products. Free Services are: SSL/TLS Security Checker, Web Server Security Checker, Phishing Security Checker, Mobile Application Security CheckerDesigned and implemented security tests, from HeartBleed, GoldenDoodle to Mobile SAST/DAST tests such as SCA (software composition analysis, which components is software made of)Made system for SSL/TLS security checks on the low level while being necessary to understand what is "16 03 ...", as well as PCI DSS, HIPAA and NIST compliances and guidelinesBuilt Phishing Security Checker free service by real time monitoring of Cybersquatting, Typosquatting and Phishing URLs targeting domain or brand. Distributed high volume of raw dns checks and aggregate phishing data for analysisBuilt Web Server Security service for checking of existence, absence and miss configuration of http security headers such as Content Security Policy, Strict Transport Security, Feature Policy; Built detection of used JavaScript components inside bundled JavaScript file. It was precise to detect which version was usedBuilt a commercial Mobile App Scanner (SAST, DAST and IAST) and asset discovery system similar to Shodan, which is used in recon/osintDeveloped lots of interesting internally used systems and tools, mainly focused on infosecMy job was often including mentoring younger colleagues. I was mentoring and teaching about raw dns packages, network analysis using traceroute, ping, tcpdump, wireshark; software engineering about deep understanding of mutexes and race conditions; security understanding how to perform and how to detect against sql injections, xss, improper access control etc.Pentesting mobile and web applications only of special clients Assisting sales for special clients. Giving advice, joining conference calls etc

Projected and developed systems for automatization of human workDevelopment of applications on social networksDevelopment of software for user analyticsDevelopment of Web portalsDevelopment of hybrid mobile applications

Development of software for automated data import from non-structured form through web site into structured data form, datamining. Software built for ​ https://nekretnine.rsBuilt CMS for classified adsTesting internal security of company IT infrastructure, as well as several pentests of https://www.blic.rs