The Extreme Light Infrastructure (ELI) [1] is the world's largest and most advanced high-power laser infrastructure and a global technology and innovation leader in high-power, high-intensity, and short-pulsed laser systems. The international laser user facility ELI accommodates some of the most intense lasers in the world. ELI’s lasers produce ultra-short pulses of high energy photons, electrons, protons, neutrons, muons and neutrinos in the (sub-)attosecond regimes on demand. There are three pillars of ELI located in three Central European countries, namely, ELI-Beamlines (Czech Republic), ELI-ALPS (Hungary) and ELI-NP (Romania). In this seminar, the speaker will be introducing ELI ALPS Research Institute (Hungary), and the latest beamline developments there. He will be talking in a great detail on the latest results on laser wakefield acceleration [2] of electron beams and the generation of ultrafast X-ray and positron beams in the Particle Acceleration Group at ELI-ALPS, he is currently leading.