  We evaluate the performance of hybrid microwave resonators made by combining
sputtered Nb thin films with Tungsten nanowires grown with a He-beam induced
deposition technique. Depending on growth conditions the nanowires have a
typical width $w\in[35-75]$~nm and thickness $t\in[5-40]$~nm. We observe a high
normal state resistance $R_{sq}\in [65-150]$ $\Omega/sq$ which together with a
critical temperature $T_c\in[4-6]~K$ ensure a high kinetic inductance making
the resonator strongly nonlinear. Both lumped and coplanar waveguide resonators
were fabricated and measured at low temperature exhibiting internal quality
factors up to $3990$ at $4.5$~GHz in the few photon regime. Analyzing the wire
length, temperature and microwave power dependence we extracted a kinetic
inductance for the W nanowire of $L_K\approx15$ pH/sq, which is 250 times
higher than the geometrical inductance, and a Kerr non-linearity as high as
$K_{W,He}/2\pi=200 \pm 120$~Hz/photon at $4.5$~GHz. The nanowires made with the
helium focused ion beam are thus versatile objects to engineer compact, high
impedance, superconducting environments with a mask and resist free direct
write process.
