CALLJOE.CO: full-stack web and app developer in London

Problem

Need a fast, scalable web app built from scratch?

Solution

I don't just write code; I make sure performance is an absolute given from day one. Clean architecture, zero bloat, and code you can actually maintain. I build apps that don't fall over when real users show up.

Problem

Need an app on both stores without paying for two separate builds?

Solution

Flutter for one codebase across iOS and Android, native Swift or Kotlin when the app depends on the device itself. I'll tell you honestly which one your app needs, and whether a mobile web app would get you there sooner and cheaper.

Problem

Unclear on what to build next or how to prioritise?

Solution

Most people build the wrong thing first. I help you cut the noise and come up with master plans to help take over the world. We make a concrete plan before I write a single line of zero-bloat code.

Problem

Struggling with slow APIs or complex integrations?

Solution

Inherited a mess from a cheap offshore dev that's killing performance? I'll sort it out. I've built complex computer systems from the early days, and I know what proper architecture needs to look like.

Problem

Worried about code quality, security or performance?

Solution

Got a codebase from a cut-price offshore team that promised the world and delivered spaghetti? Let me give you honest feedback. No miscommunication, no faff, just a straight-up technical audit.

Problem

Spending too many hours on repetitive manual work?

Solution

I've automated entire businesses end-to-end. CRM workflows, invoice chasing, scheduled reporting, multi-platform notifications, if your team is doing the same thing manually every day, that's a solvable problem.

Problem

Ready to launch but need to move fast and validate quickly?

Solution

I've launched businesses from nothing. I know what to cut, what to keep, and how to ship something real people will actually use, without spending six months building features nobody asked for.

Problem

Stuck on Wix, Squarespace, WordPress or Lovable, and paying for the privilege?

Solution

I migrate you off the builder onto Next.js and real infrastructure, with every URL redirected so your rankings survive the move. Faster, cheaper to run, and the code is yours this time.

Problem

Posting nothing, or posting content that reads like a robot wrote it?

Solution

Photo, video, and copy that actually sounds like your business. I've built and run the kind of businesses I make content for, so I know what the offer is before I point a camera at it. No stock photos of strangers shaking hands in a boardroom.

Problem

Account's been dead since last year and you've no time to fix it?

Solution

I run it properly. Consistent posting, replies that sound like a human wrote them, and an actual plan behind it instead of posting whenever someone remembers. You get the visibility without adding another job to your week.

Problem

Burning budget on ads that bring in nothing?

Solution

Most ad spend dies because nobody's tracking what happens after the click. I build the campaign and the thing it points at, landing page, tracking, follow-up, so you can see what a lead actually costs. No vanity metrics, no monthly report full of impressions.

Problem

Need something physical? A prototype, a display piece, a run of promo?

Solution

Design to watertight STL to printed part, all in-house. Prototypes, signage, display pieces, awards, models. I got into it because I like making things, and it turns out plenty of businesses need something a customer can actually pick up.

Problem

Need to show a product that doesn't exist yet, or can't be photographed?

Solution

Modelled, lit and rendered in Blender. Product visuals, animations, and interactive 3D that runs in the browser with Three.js. Useful when the product is unbuilt, too big to photograph, or comes in fourteen finishes.

Problem

Got a part to make and no drawings, or drawings nobody can manufacture from?

Solution

Parametric CAD from a sketch, a measurement or a broken original. Dimensioned drawings, watertight STLs for printing, and files a manufacturer can actually quote against.

Problem

Want something interactive and real-time rather than a video?

Solution

Unreal Engine builds: game prototypes, architectural walkthroughs, product configurators, training simulations. Real-time and explorable, not a fixed camera path someone watches once.

Problem

Want a presence on Roblox, or a map built properly rather than bodged?

Solution

Roblox maps and experiences built in Studio with Luau scripting. Branded worlds, game mechanics, monetisation and analytics. Including a straight answer on whether your audience is actually there.

Problem

Need an experience people walk into, not another screen they scroll past?

Solution

Installations, exhibition stands, projection and VR builds that put your audience inside the thing. I design the experience, build the real-time content behind it, and make sure it survives a week of strangers pressing every button on it.