Strong attachment between functional nanoparticles and support materials is often achieved via thermal annealing. However, this can lead to sintering of the metal nanoparticles and the loss of desirable morphologies, reducing their overall performance. Polymers have been demonstrated as effective anchors without the need for further processing steps potentially detrimental to the nanoparticle properties. By avoiding harsh thermal or chemical treatments, polymers also enable the synthesis of "Janus" particles via the Pickering wax emulsion technique. The "patchiness" of such particles can lead to new properties interesting for a range of applications. For example, Synytska and co-workers demonstrated the benefits of using "hairy", sub-micron catalytic Janus particles in interfacial catalysis, exploiting an asymmetry in the particle wetting properties and the distribution of metal nanoparticles grown in-situ from solution, to better stabilise and catalyse reactions in emulsions. The asymmetric modification of solid microparticle supports with pre-synthesised functional nanoparticles is also highly advantageous for the synthesis of active matter systems. Here, the anisotropic distribution of catalytic material on a Janus microswimmer generates local gradients around its surface by decomposing "fuel", resulting in self-phoretic motion. Currently, the synthesis of active Janus colloids suffers from several limitations, in particular, an over-reliance on physical vapour deposition methods for particle functionalisation. Not only does this limit the scalability of Janus microswimmer synthesis, but it also significantly constrains the selection and quality of the materials and leads to poor reproducibility between batches. In contrast, by making use of pre-synthesised functional nanoparticles, favourable properties such as high crystallinity or specific material phases can be programmed into the microswimmer design, in-turn imparting improved catalytic efficiency or visible light activation to photo-responsive Janus colloids. This is particularly promising for the "chemistry-on-the-fly" concept, as the nano-catalysts can be targeted towards "fuels" generating useful chemical products as a byproduct of microswimmer propulsion. Thus, nanoparticle-functionalised microswimmers could realise their potential as catalyst-stirrers, locally mixing solutions while acting as motile catalysts, thereby enhancing the overall reaction efficiency. Here, we propose a flexible platform to achieve the versatile and modular attachment of a diverse range of nanoparticles onto SiO 2 microparticles. To this end, we exploit a multipurpose polymer bridge to attach mixtures of metal-oxide and metal nanoparticles onto microparticle supports. In brief, we post-modify poly(pentafluorophenyl acrylate) (pPF-PAc), to obtain a polymer backbone with different chemical functional groups, tailored towards the pre-synthesised nanoparticles of interest. We first demonstrate the versatility of our approach by attaching a mixture of metal-oxide nanoparticles, including magnetic iron oxide. We then show the generalisability of our method by attaching pre-modified TiO 2 nanoparticles, drawing upon the extensive library of synthetic strategies in the literature to functionalise TiO 2 P-25 with metal nanoparticles to obtain superior photocatalysts.