Claude Code Expert Developer · United Kingdom
Claude Code developer working across United Kingdom. I treat Anthropic's AI as a build tool, not a shortcut to skip the hard parts.
Claude Code writes Firebase Cloud Functions, Flutter state machines, REST client wrappers. I own the architecture, run penetration tests, and code the business rules that differentiate your product. London fintech, Manchester healthtech, Edinburgh insurtech: I ship production code that survives audit.
The UK demands compliance and uptime. I deliver apps that clear FCA hurdles, handle Black Friday traffic, and don't leak PII in Sentry logs.
Fixed-price packages. No hourly guessing.
50% upfront, 50% at delivery. Stripe or wire transfer. VAT invoiced if you're UK-registered.
MVP sprint
- 2-week delivery, Claude Code accelerated
- Flutter + Firebase backend, production config
- Auth, Firestore, Cloud Functions Gen 2
- iOS + Android builds, TestFlight + internal test track
- 48-hour support window post-launch
Full app build
- 4-6 week delivery, iterative sprints
- Custom UI, animations, offline-first architecture
- Stripe or GoCardless integration, webhooks
- App Store + Google Play submission, metadata
- 2 months post-launch support included
Security audit
- Firestore rules review, penetration testing
- OWASP Top 10 mobile checklist
- PII leak scan, secret detection in logs
- Fixes prioritised by CVSS score
- Compliance report for FCA or ICO if needed
App marketing sprint
- TikTok organic content strategy, 4 videos scripted and edited
- ASO audit: keywords, screenshots, A/B test plan
- Paid acquisition test: £500 ad budget included, Meta or TikTok
- Landing page copy and conversion funnel review
What I build with Claude Code in the UK
Fintech MVPs that clear compliance
London's fintech cluster moves fast but FCA doesn't. I build payment flows, KYC integrations, transaction ledgers that pass third-party audit.
Claude Code scaffolds the API clients and Firestore schema. I write the PCI-DSS checks, the idempotency keys, the webhook retry logic that keeps your float balanced. Starling, Revolut, Monzo set the bar. I help you clear it.
Healthtech apps with real data governance
NHS procurement is brutal. GDPR fines are real. I build patient portals, telemedicine booking, symptom trackers that treat PHI like radioactive material.
Claude Code generates the CRUD and the form validation. I design the role-based access control, encrypt fields at rest, log every read for audit trails. Cambridge and Manchester healthtech hubs demand this discipline. I deliver it.
Legacy Flutter refactors using Claude Code
You inherited a 40k-line Flutter monolith with no tests and a GetX dependency hell. I've seen worse.
Claude Code rewrites feature modules into clean architecture layers. I migrate Firebase SDK versions, replace deprecated packages, add integration tests that catch regressions. Three-week sprint, Git history preserved, your team can maintain it after I leave. Check FlutterFlow expertise if you want a no-code audit path later.
Claude Code writes scaffolding. I write the logic that survives production.
<p>I don't prompt Claude Code to "build me an app". I feed it architecture decisions, type signatures, test cases. It outputs boilerplate. I review every line, run static analysis, fuzz the endpoints, deploy behind feature flags.</p><p>The result is production-grade code you can audit, extend, and hand to your next hire without a 40-page knowledge transfer doc.</p>
$ claude-code "Audit the Firestore rules in firestore.rules.
Find any collection readable without auth.
Fix each rule to require authentication.
Add rate limiting on the leads collection.
Run firebase deploy --only firestore:rules when done."
> Reading firestore.rules...
> Found 2 collections with public read: analytics_events, settings
> Patching rules... Done.
> Deploying... ✓ Rules updated.Solo dev vs agency vs marketplace
| UK agency | Upwork freelancer | Hugo + Claude Code | |
|---|---|---|---|
| Delivery speed | 8-12 weeks, waterfall | 4-6 weeks, chaos | 2-4 weeks, iterative |
| Code ownership | Locked in proprietary tooling | Spaghetti you inherit | Clean repo, yours forever |
| Security audit | Extra £15k, 3-week wait | Not offered | Included, OWASP checklist |
| Post-launch support | Retainer or nothing | Gone after final payment | 48h response, async Slack |
| FCA/GDPR compliance | Yes, billable hours | No clue | Baked into architecture |
| Price transparency | Opaque, scope creep | Low until revisions | Fixed, no surprise invoices |
Claude Code developer UK: your questions answered
No. Claude Code generates Firebase Function skeletons, Firestore security rules templates, Flutter repository classes. It doesn't understand your business model, your KYC provider's webhook signature scheme, or why idempotency matters when charging cards.
I map the domain logic, audit the generated code, write integration tests, deploy with feature flags. Claude Code is a compiler that speaks English. I'm the engineer who feeds it specs and catches the bugs.
I work remote from Tbilisi. UK timezone overlap is fine: 9am London is 1pm here. I do kick-off calls, weekly syncs, and launch retrospectives over Zoom.
If you need on-site pairing for a compliance workshop or architecture review, I can fly in for 3-5 days. You cover flights and accommodation, I cover my time. Most clients find async Slack and Loom videos sufficient.
I never send real user data, API keys, or production secrets to Claude Code. Prompts use anonymised schemas, dummy fixtures, placeholder emails.
Generated code runs in a sandboxed Firebase emulator first. I review every Firestore rule, check for accidental logging of PII, validate encryption at rest. Your ICO audit won't find Claude Code in the data flow because it never touched production data.
It has, twice. Once a malformed Firestore query that worked in emulator but failed at scale. Once a race condition in a payment webhook that Claude Code missed because I didn't specify idempotency in the prompt.
Both caught in staging. I run integration tests on every PR, deploy behind feature flags, monitor Sentry in real time for 48 hours post-launch. If a Claude Code bug reaches production, I fix it same-day at no extra cost. That's in the contract.
I worked with a London insurtech building a claims photo upload app. Legacy Firebase setup, no tests, Cloud Functions timing out under load.
Claude Code rewrote the image pipeline: client-side compression, signed upload URLs, Cloud Vision OCR, Firestore transaction to update claim status. I added retry logic, structured logging, alerting when OCR confidence drops below 85%. Three-week sprint, passed their penetration test, handles 400 uploads per hour now.
NDA prevents naming the client. If you're Series A or later I can intro you to their CTO for a reference call.
Ship production-ready code in United Kingdom with Claude Code
<p>Book a 30-minute call. Explain your product, your deadline, your compliance requirements. I'll send a fixed-price quote within 48 hours. If we're a fit, I start within a week.</p><p>No hourly guessing. No scope creep invoices. No code you can't maintain after I leave.</p>
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