Nachmias was born in kibbutz Ein Zivan, Israel, to an Israeli family of Greek Jewish descent. He was grew up in moshav Ani'am, Israel.
Nachmias made his professional debut for Ironi Kiryat Shmona in the Israeli Premier League on 6 May 2017, coming on as a substitute in the 58th minute for Ahmed Abed against Hapoel Kfar Saba, which finished as a 1–4 home loss.
On 21 June 2021, Nachmias signed for 4 years in Maccabi Tel Aviv.
Nachmias made his international debut for Israel on 14 October 2020 in the UEFA Nat…
ions League, coming on as a substitute for Orel Dgani in the third minute of second-half stoppage time against Slovakia. The away match finished as a 3–2 win.
| Season | Team | Competition | Apps | St | Min | G | A | ||
|---|---|---|---|---|---|---|---|---|---|
| 2026-2027 | Hapoel Be'er Sheva |
UEFA Europa League | 2 | 1 | 98 | 0 | 0 | 0 | 0 |
| 2026-2027 | Israel |
UEFA Nations League | 3 | 3 | 270 | 0 | 0 | 1 | 0 |
| 2026-2027 | Ludogorets Razgrad |
UEFA Conference League | 2 | 0 | 14 | 0 | 0 | 1 | 0 |
| Total | 7 | 4 | 382 | 0 | 0 | 2 | 0 | ||
