[4] In September 2017, Danielian competed at his first Junior Grand Prix (JGP) assignment, placing seventh in Zagreb, Croatia.

This happened because junior champion Daniil Samsonov was not age-eligible to compete internationally and fourth-place finisher Erokhov withdrew.

At the Junior Worlds, Danielian placed ninth in the short program, fifth in the free skating and fourth overall, with a new personal best score of 220.68 points.

Making his senior international debut on the Challenger series at 2019 CS Golden Spin of Zagreb, he placed fourth.

[6] Danielian's performance earned him a berth at the 2020 European Championships, where he placed third in the short program despite stepping out of his triple Axel.

[9] Danielian was scheduled to make his Grand Prix debut at the 2020 Rostelecom Cup, but withdrew due to his surgical recovery.