The people behind Expert Group.
A small, senior team organised into three functions that work together every day — matrixed, without silos. All functions report directly to the director, and specialists are assigned per project and named in the proposal.
Nikola Jeremić
Co-Founder · CEO · Principal Architect. Lead architect of a HIPAA-aligned mental health EHR system — 10+ microservices and atomic permissions management, cutting the cost of onboarding a clinic by 60%. Eight years in BIG4 consulting — Senior Manager at EY, Manager at KPMG. Ten Microsoft certifications, including Fabric Analytics Engineer. Teaches the Power BI data-analysis course at MNG Center — five-plus cohorts of students.
Custom enterprise software: web applications, integrations and operational platforms.
Aleksandar Gucunja
Owns delivery end to end — specification, architecture, budget, UAT, handover — and sets the technical standards the team builds to. Seven years at EY, latterly Senior Manager.
Vukašin Vulović
Works with: Data & AI · Shared functions
Nikola Ivezić
Aleksandra Perkucin
Works with: Data & AI · Shared functions
Daria Rakkad
Tatjana Grigorijev
Data, BI and AI: Microsoft Fabric, semantic models, Power BI and on-premise LLM systems.
Stefan Seman
Builds production AI systems with the research discipline of a published academic. Took enterprise RAG from proof of concept to production at Publicis Sapient; led a team of six engineers at Valcon Netherlands. Author of the company's AI engineering standards.
Darko Simić
Lead BI engineer on treasury-sector reporting, where auditability and accuracy were acceptance criteria, not preferences. Builds Fabric platforms with medallion layering and CDC. Owns the numbers executives see.
Borivoj Grujičić
Works with: Software Development · Shared functions
Dušan Simonović
Jakov Vidojević
Dragan Rončević
Business development, human resources and accounting — support across the whole of delivery.
Viktor Jaćović
Svetlana Savić
Ana Rabrenović
